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Dayang Chem (Hangzhou) Co.,Ltd.

Dayangchem's R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. DayangChem can provide different quantities

3,3'-Dihydroxybenzidine Manufacturer/High quality/Best price/In stock

Cas:2373-98-0

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply 3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:1

Negotiable

Type:Other

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Xi'an Xszo Chem Co., Ltd.

1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s

Factory Price OLED 99% 2373-98-0 3,3'-Dihydroxybenzidine Manufacturer

Cas:2373-98-0

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

inquiry

Chemwill Asia Co., Ltd.

3,3'-Dihydroxybenzidine Manufacturer Factory CAS 2373-98-0 3,3'-Dihydroxybenzidine Manufacturer High quality Best price In stock factory CAS 2373-98-0 3,3'-Dihydroxybenzidine COA TDS price MSDS 3,3'-Dihydroxybenzidine Chemical P

3,3'-Dihydroxybenzidine Manufacturer Factory CAS 2373-98-0

Cas:2373-98-0

Min.Order:5 Kiloliter

FOB Price: $3.5 / 5.0

Type:Manufacturers

inquiry

Henan Tianfu Chemical Co., Ltd.

Our company was built in 2009 with an ISO certificate.In the past 5 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.O

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:1 Gram

FOB Price: $1.0

Type:Lab/Research institutions

inquiry

Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

Pharmaceutical Grade CAS 2373-98-0 with competitive price

Cas:2373-98-0

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Henan Sinotech Import&Export Corporation

Product Name 3,3'-Dihydroxybenzidine Abbreviation HAB Cas No. 2373-98-0 Appearance Off-white powder Purity ≥99% Molecular formula Appearance:Off-white powder Storag

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

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Hubei Langyou International Trading Co., Ltd

Advantages: Hubei XinRunde Chemical Co., Ltd is a renowned pharmaceutical manufacturer. We can offer high quality products at competitive price in quick delivery with 100% custom pass guaranteed. Never stop striving to offer our best service is

3,3'-Dihydroxybenzidine CAS NO 2373-98-0

Cas:2373-98-0

Min.Order:1 Kilogram

Negotiable

Type:Other

inquiry

Shanghai Upbio Tech Co.,Ltd

1.No Less 8 years exporting experience. Clients can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specialized

[1,1'-Biphenyl]-3,3'-diol,4,4'-diamino- 2373-98-0

Cas:2373-98-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Qingdao Beluga Import and Export Co., LTD

3,3'-Dihydroxybenzidine CAS:2373-98-0 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high quality organ

3,3'-Dihydroxybenzidine CAS:2373-98-0

Cas:2373-98-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Shandong Hanjiang Chemical Co., Ltd.

Hello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai

[1,1'-Biphenyl]-3,3'-diol,4,4'-diamino-

Cas:2373-98-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Wentao Chemical Product Co., Ltd.

Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

[1,1'-Biphenyl]-3,3'-diol,4,4'-diamino-

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Wuhan Zenuo Biological Medicine Technology Co Ltd

Product Name: 3,3'-Dihydroxybenzidine Synonyms: Dihydroxybenzidine;2-amino-5-(4-amino-3-hydroxyphenyl)phenol;3,3-DIHYDROXYBENZIDINE 98+%;4,4'-Diamino-3,3'-biphenyldiol;4,4'-Diaminobiphenyl-3,3'-diol;3,3'-Dihydroxybiphenyl

3,3'-Dihydroxybenzidine manufactory best quality

Cas:2373-98-0

Min.Order:100 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Xiamen Hisunny Chemical Co.,Ltd

Best quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia

3,3'-Biphenyldiol, 4,4'-Diamino

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Afine Chemicals Limited

Company Introduction 1. Established in 2005, with two independent business divisions: Fine chemicals division; Pharmaceutical division. 2. Main product: Optical brightener Textile auxiliary Dye stuff Pigments

3,3'-DIHYDROXYBENZIDINE

Cas:2373-98-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou J&H Chemical Co., Ltd.

J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

3.3'-DIHYDROXY-4.4'-DIAMINO-BIPHENYL

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Fonlynn Health Technology Co., Ltd.

Packing: According to customer requirements Delivery time: In stock or depands Port of shipment: Ningbo/Shanghai/Qingdao OEM/ODM:Welcome Sample:We can offer our existing samples at once Transportation:Express/Sea/Air Port:Ningbo/Shanghai/Qingd

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Zibo Hangyu Biotechnology Development Co., Ltd

Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi

cas:2373-98-0

Cas:2373-98-0

Min.Order:10 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Siwei Development Group Ltd.

Product name: 3,3’-Dihydroxybenzidine CAS No.:2373-98-0 Molecule Formula:C12H12N2O2 Molecule Weight:216.23 Purity: 99% Package: 25kg/drum Description:White powder Manufacture Standards:Enterprise Standard TESTING ITEMS

High Quality 3,3’-Dihydroxybenzidine in stock

Cas:2373-98-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Zibo Dorne chemical technology co. LTD

Product Details Grade: pharmaceutical grade Purity:99%+ ProductionCapacity: 1000 Kilogram/Month Scope of use: For scientific research only(The product must be used legally) Our Advantage 1. Best quality with competitive price. 2. Quick shipping,

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Kanbei Chemical Co.,LTD

High quality, competitive price, fast delivery and first-class service we possesses have won the trust and praise of customers. Standard: BP/USP/EP The purity is equal or greater than 99%. As a supplier, we can provide high-quality products. Cle

3,3'-Dihydroxybenzidine (HAB)

Cas:2373-98-0

Min.Order:1 Metric Ton

FOB Price: $1.0

Type:Lab/Research institutions

inquiry

Shandong Mopai Biotechnology Co., LTD

Shandong Mopai Biotechnology Co., LTD is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemicals. W

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou ZeErRui Chemical Co., Ltd.

Product Name 3,3'-Dihydroxybenzidine CAS No 2373-98-0 Structural formula Molecular formula

3,3'-Dihydroxybenzidine manufacture

Cas:2373-98-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

HANGZHOU TIANYE CHEMICALS CO., LTD.

We product this chemical more than 10 years . We are very experience to export it to many countries, Our superior & stable quality , competitive price gain warm reception from our customers. Specification : 3,3'-Dihydroxybenzidine CAS

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:1 Gram

Negotiable

Type:Trading Company

inquiry

KAISA GROUP INC

1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer

2373-98-0 CAS NO.2373-98-0

Cas:2373-98-0

Min.Order:1 Metric Ton

FOB Price: $7.0 / 8.0

Type:Trading Company

inquiry

HANGZHOU YUNUO CHEMICAL CO.,LTD

Superior quality, moderate price & quick delivery. Appearance:white powder Storage:sealed and stored Package:as per your request Application:pharmaceutical intermediates; synthesis intermediates. Transportation:as per your request Port:Shanghai

3,3'-Dihydroxybenzidine(p-HAB)

Cas:2373-98-0

Min.Order:1 Gram

Negotiable

Type:Trading Company

inquiry

Win-Win chemical Co.Ltd

Stock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai

2-amino-5-(4-amino-3-hydroxyphenyl)phenol cas no. 2373-98-0 98%

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hubei Vanz Pharm Co.,Ltd

ISO Factory/Good qualityAppearance:off white Storage:dry and cool place Package:10G/BAG; 1KG/BAG ;25KG/DRUM Application:Active pharaceutical ingredients Transportation:BY SEA,AIR,EXPRESS Port:SHANGHAI;BEIJING

3,3'-Dihydroxybenzidine (p-HAB)

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Kono Chem Co.,Ltd

high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Other

inquiry

GIHI CHEMICALS CO.,LIMITED

high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier

3,3'-Dihydroxybenzidine

Cas:2373-98-0

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

3,3’-dihydroxy-4,4’-dinitrobiphenyl

3,3’-dihydroxy-4,4’-dinitrobiphenyl

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With sodium tetrahydroborate; nickel(II) chloride hexahydrate In tetrahydrofuran for 2h; Cooling with ice;97.4%
C14H8N2O4

C14H8N2O4

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Stage #1: C14H8N2O4 With ammonium hydroxide at 100 - 110℃; under 750.075 - 2250.23 Torr; Large scale;
Stage #2: With sulfuric acid at 20 - 70℃; pH=3-4; Large scale;
89.9%
3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine
119-90-4

3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With hydrogen iodide at 138℃;
With potassium hydroxide at 230 - 240℃; under 22065.2 - 29420.3 Torr;
3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine
119-90-4

3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine

A

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

B

4,4'-diamino-3'-methoxy-biphenyl-3-ol
87084-62-6

4,4'-diamino-3'-methoxy-biphenyl-3-ol

Conditions
ConditionsYield
With sulfuric acid
4,4'-diamino-3,3'-diethoxybiphenyl
6264-77-3

4,4'-diamino-3,3'-diethoxybiphenyl

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With sodium hydroxide at 230 - 240℃; under 22065.2 - 29420.3 Torr;
3,3'-bis-sulfooxy-benzidine
738545-25-0

3,3'-bis-sulfooxy-benzidine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With hydrogenchloride
With hydrogenchloride
With sulfuric acid
hydrogenchloride
7647-01-0

hydrogenchloride

2,2'-dimethyl-[6,6']bibenzoxazolyl
6309-66-6

2,2'-dimethyl-[6,6']bibenzoxazolyl

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

hydrogenchloride
7647-01-0

hydrogenchloride

3,3'-bis-sulfooxy-benzidine
738545-25-0

3,3'-bis-sulfooxy-benzidine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

sulfuric acid
7664-93-9

sulfuric acid

3,3'-bis-sulfooxy-benzidine
738545-25-0

3,3'-bis-sulfooxy-benzidine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

2-amino-6-nitrophenol
603-87-2

2-amino-6-nitrophenol

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1.1: triethylamine / 1,2-dichloro-ethane / 65 - 75 °C / Large scale
2.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
3.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
4.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
5.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
6.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
6.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
2,6-dinitrophenol
573-56-8

2,6-dinitrophenol

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1.1: palladium on activated charcoal; hydrogen / 1,2-dichloro-ethane / 35 - 40 °C / 1500.15 - 4500.45 Torr / Large scale
2.1: triethylamine / 1,2-dichloro-ethane / 65 - 75 °C / Large scale
3.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
4.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
5.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
6.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
7.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
7.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
4-nitrobenzo[d]oxazol-2(3H)-one
28955-71-7

4-nitrobenzo[d]oxazol-2(3H)-one

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
2.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
3.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
4.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
5.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
5.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
4-amino-2-benzoxazolone
81900-93-8

4-amino-2-benzoxazolone

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
2.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
3.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
4.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
4.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
2-Benzoxazolinone
59-49-4

2-Benzoxazolinone

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
2.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
3.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
3.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
1-chloro-2,6-dinitrobenzene
606-21-3

1-chloro-2,6-dinitrobenzene

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1.1: water / 50 - 85 °C / Alkaline conditions; Large scale
1.2: pH 1 / Large scale
2.1: palladium on activated charcoal; hydrogen / 1,2-dichloro-ethane / 35 - 40 °C / 1500.15 - 4500.45 Torr / Large scale
3.1: triethylamine / 1,2-dichloro-ethane / 65 - 75 °C / Large scale
4.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
5.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
6.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
7.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
8.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
8.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Gold's reagent
20353-93-9

Gold's reagent

6,6'-bisbenzoxazole
31139-60-3

6,6'-bisbenzoxazole

Conditions
ConditionsYield
In 1,4-dioxane for 17h; Heating;100%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

orthoformic acid triethyl ester
122-51-0

orthoformic acid triethyl ester

6,6'-bisbenzoxazole
31139-60-3

6,6'-bisbenzoxazole

Conditions
ConditionsYield
for 48h; Heating;100%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C19H21BrN2O8

C19H21BrN2O8

C51H54N6O19

C51H54N6O19

Conditions
ConditionsYield
With calcium hydride In tetrahydrofuran for 48h; Inert atmosphere; Reflux;98.2%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C48H79BrN2O8

C48H79BrN2O8

C108H168N6O18

C108H168N6O18

Conditions
ConditionsYield
With calcium hydride In tetrahydrofuran for 48h; Inert atmosphere; Reflux;98.2%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C22H27ClN2O8

C22H27ClN2O8

C57H66N6O19

C57H66N6O19

Conditions
ConditionsYield
With sodium hydride In tetrahydrofuran for 48h; Inert atmosphere; Reflux;98.2%
maleic anhydride
108-31-6

maleic anhydride

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C20H16N2O8

C20H16N2O8

Conditions
ConditionsYield
In acetone for 12h; Inert atmosphere;96.5%
phthalic anhydride
85-44-9

phthalic anhydride

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

2,2'-(3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-diyl)bis(isoindoline-1,3-dione)

2,2'-(3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-diyl)bis(isoindoline-1,3-dione)

Conditions
ConditionsYield
With isoquinoline In 1-methyl-pyrrolidin-2-one at 170℃; for 2h;96%
With isoquinoline In 1-methyl-pyrrolidin-2-one at 170℃; for 2h;91.4%
Stage #1: phthalic anhydride; 3,3'-dihydroxybenzidine In 1-methyl-pyrrolidin-2-one Inert atmosphere;
Stage #2: With isoquinoline In 1-methyl-pyrrolidin-2-one at 170℃; for 2h;
86%
With isoquinoline In 1-methyl-pyrrolidin-2-one at 170℃; for 2h; Inert atmosphere; Schlenk technique;
With isoquinoline In 1-methyl-pyrrolidin-2-one at 120℃; for 6h;
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

N-bis-(methylsulfanylmethylene)benzenesulfonamide
13068-20-7

N-bis-(methylsulfanylmethylene)benzenesulfonamide

2,2'-bis(phenylsulfonylamino)-6,6'-bibenzoxazole
127933-42-0

2,2'-bis(phenylsulfonylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With sodium hydroxide In N,N-dimethyl-formamide95%
Stage #1: 3,3'-dihydroxybenzidine With sodium hydroxide In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: N-bis-(methylsulfanylmethylene)benzenesulfonamide In N,N-dimethyl-formamide for 8h; Reflux; Inert atmosphere;
80%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C22H27IN2O8

C22H27IN2O8

C57H66N6O19

C57H66N6O19

Conditions
ConditionsYield
With sodium carbonate In tetrahydrofuran for 8h; Inert atmosphere; Reflux;93.8%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C22H27BrN2O8

C22H27BrN2O8

C57H66N6O19

C57H66N6O19

Conditions
ConditionsYield
With potassium carbonate In tetrahydrofuran for 24h; Inert atmosphere; Reflux;93.7%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

1-naphthaldehyde
66-77-3

1-naphthaldehyde

C34H24N2O2

C34H24N2O2

Conditions
ConditionsYield
In ethanol at 78℃; for 6h;93%
tert-butylisonitrile
119072-55-8, 7188-38-7

tert-butylisonitrile

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

N3,N3'-di-tert-butyl-2,2'-bis(tert-butylimino)-2H,2'H-[7,7'-bibenzo[b][1,4]oxazine]-3,3'-diamine
1427468-99-2

N3,N3'-di-tert-butyl-2,2'-bis(tert-butylimino)-2H,2'H-[7,7'-bibenzo[b][1,4]oxazine]-3,3'-diamine

Conditions
ConditionsYield
With palladium dichloride In 1,4-dioxane at 50℃; for 2h;89%
C18H12F12N2O3
883747-51-1

C18H12F12N2O3

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

benzene-1,3-dicarbonyl dichloride
99-63-8

benzene-1,3-dicarbonyl dichloride

Reaxys ID: 18370081

Reaxys ID: 18370081

Conditions
ConditionsYield
In N,N-dimethyl acetamide at 20℃; for 5h;87%
3,3’-dihydroxy-4,4’-dinitrobiphenyl

3,3’-dihydroxy-4,4’-dinitrobiphenyl

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With sodium tetrahydroborate; nickel(II) chloride hexahydrate In tetrahydrofuran for 2h; Cooling with ice;97.4%
C14H8N2O4

C14H8N2O4

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Stage #1: C14H8N2O4 With ammonium hydroxide at 100 - 110℃; under 750.075 - 2250.23 Torr; Large scale;
Stage #2: With sulfuric acid at 20 - 70℃; pH=3-4; Large scale;
89.9%
3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine
119-90-4

3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With hydrogen iodide at 138℃;
With potassium hydroxide at 230 - 240℃; under 22065.2 - 29420.3 Torr;
3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine
119-90-4

3,3'-dimethoxy-(1,1'-biphenyl)-4,4'-diamine

A

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

B

4,4'-diamino-3'-methoxy-biphenyl-3-ol
87084-62-6

4,4'-diamino-3'-methoxy-biphenyl-3-ol

Conditions
ConditionsYield
With sulfuric acid
4,4'-diamino-3,3'-diethoxybiphenyl
6264-77-3

4,4'-diamino-3,3'-diethoxybiphenyl

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With sodium hydroxide at 230 - 240℃; under 22065.2 - 29420.3 Torr;
3,3'-bis-sulfooxy-benzidine
738545-25-0

3,3'-bis-sulfooxy-benzidine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
With hydrogenchloride
With hydrogenchloride
With sulfuric acid
hydrogenchloride
7647-01-0

hydrogenchloride

2,2'-dimethyl-[6,6']bibenzoxazolyl
6309-66-6

2,2'-dimethyl-[6,6']bibenzoxazolyl

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

hydrogenchloride
7647-01-0

hydrogenchloride

3,3'-bis-sulfooxy-benzidine
738545-25-0

3,3'-bis-sulfooxy-benzidine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

sulfuric acid
7664-93-9

sulfuric acid

3,3'-bis-sulfooxy-benzidine
738545-25-0

3,3'-bis-sulfooxy-benzidine

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

2-amino-6-nitrophenol
603-87-2

2-amino-6-nitrophenol

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1.1: triethylamine / 1,2-dichloro-ethane / 65 - 75 °C / Large scale
2.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
3.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
4.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
5.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
6.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
6.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
2,6-dinitrophenol
573-56-8

2,6-dinitrophenol

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1.1: palladium on activated charcoal; hydrogen / 1,2-dichloro-ethane / 35 - 40 °C / 1500.15 - 4500.45 Torr / Large scale
2.1: triethylamine / 1,2-dichloro-ethane / 65 - 75 °C / Large scale
3.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
4.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
5.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
6.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
7.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
7.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
4-nitrobenzo[d]oxazol-2(3H)-one
28955-71-7

4-nitrobenzo[d]oxazol-2(3H)-one

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
2.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
3.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
4.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
5.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
5.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
4-amino-2-benzoxazolone
81900-93-8

4-amino-2-benzoxazolone

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
2.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
3.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
4.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
4.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
2-Benzoxazolinone
59-49-4

2-Benzoxazolinone

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
2.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
3.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
3.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
1-chloro-2,6-dinitrobenzene
606-21-3

1-chloro-2,6-dinitrobenzene

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1.1: water / 50 - 85 °C / Alkaline conditions; Large scale
1.2: pH 1 / Large scale
2.1: palladium on activated charcoal; hydrogen / 1,2-dichloro-ethane / 35 - 40 °C / 1500.15 - 4500.45 Torr / Large scale
3.1: triethylamine / 1,2-dichloro-ethane / 65 - 75 °C / Large scale
4.1: hydrogen; platinum on activated charcoal / 1,2-dichloro-ethane / 55 - 65 °C / 4500.45 - 6000.6 Torr / Large scale
5.1: sulfuric acid; sodium nitrite; copper(II) sulfate / isopropyl alcohol; ethyl acetate / Heating; Large scale
6.1: sulfuric acid; sodium iodide; dihydrogen peroxide / methanol / 34 - 38 °C / Large scale
7.1: palladium on activated charcoal; triethylamine / toluene / Heating; Large scale
8.1: ammonium hydroxide / 100 - 110 °C / 750.08 - 2250.23 Torr / Large scale
8.2: 20 - 70 °C / pH 3-4 / Large scale
View Scheme
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

acrolein
107-02-8

acrolein

[6,6'-biquinoline]-8,8'-diol

[6,6'-biquinoline]-8,8'-diol

Conditions
ConditionsYield
With hydrogenchloride; sodium hydroxide In water for 2h; Skraup, Doebner-Miller Synthesis; Reflux;34%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

2-(4-(dibutylamino)phenyl)-6-hydroxybenzofuran-5-carbaldehyde

2-(4-(dibutylamino)phenyl)-6-hydroxybenzofuran-5-carbaldehyde

C58H58N4O6

C58H58N4O6

Conditions
ConditionsYield
With potassium cyanide; phenylboronic acid In methanol at 20℃; Inert atmosphere;43%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

methyl N-phenyldithiocarbamate
701-73-5

methyl N-phenyldithiocarbamate

2,2'-bis(phenylamino)-6,6'-bibenzoxazole
127933-19-1

2,2'-bis(phenylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With mercury(II) oxide In N,N-dimethyl-formamide for 8h; Heating;48%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

methyl N-(4-methoxyphenyl)dithiocarbamate
34956-06-4

methyl N-(4-methoxyphenyl)dithiocarbamate

2,2'-bis(4-methoxyphenylamino)-6,6'-bibenzoxazole
127933-22-6

2,2'-bis(4-methoxyphenylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With mercury(II) oxide In N,N-dimethyl-formamide50%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C12H14N2S3
103588-18-7

C12H14N2S3

2,2'-bis(5,6-dimethyl-2-benzothiazolylamino)-6,6'-bibenzoxazole

2,2'-bis(5,6-dimethyl-2-benzothiazolylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With sodium hydroxide In N,N-dimethyl-formamide58%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

N-(4-chlorophenyl)-S-methyldithiocarbamate
705-69-1

N-(4-chlorophenyl)-S-methyldithiocarbamate

2,2'-bis(4-chlorophenylamino)-6,6'-bibenzoxazole
127933-21-5

2,2'-bis(4-chlorophenylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With mercury(II) oxide In N,N-dimethyl-formamide60%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

methyl (N-(4-methylphenyl))dithiocarbamate
13037-22-4

methyl (N-(4-methylphenyl))dithiocarbamate

2,2'-bis(4-tolylamino)-6,6'-bibenzoxazole
127933-20-4

2,2'-bis(4-tolylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With mercury(II) oxide In N,N-dimethyl-formamide63%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

benzoyl chloride
98-88-4

benzoyl chloride

2,2'-diphenyl-6,6'-bibenzoxazole
1724-54-5

2,2'-diphenyl-6,6'-bibenzoxazole

Conditions
ConditionsYield
Stage #1: 3,3'-dihydroxybenzidine; benzoyl chloride In 1-methyl-pyrrolidin-2-one at 0℃; for 1h; Inert atmosphere;
Stage #2: With pyridine In 1-methyl-pyrrolidin-2-one for 2h; Inert atmosphere; Reflux;
65%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

4-fluorobenzenesulfonic acid sodium salt
651-07-0

4-fluorobenzenesulfonic acid sodium salt

3,3'-bis(4-sulfophenoxy)benzidine
860615-75-4

3,3'-bis(4-sulfophenoxy)benzidine

Conditions
ConditionsYield
With potassium carbonate In 1-methyl-pyrrolidin-2-one; toluene at 20 - 170℃; for 28.5h; Inert atmosphere;65%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

dimethyl N-(1,3-benzothiazol-2-yl) dithio imidocarbonate
76423-99-9

dimethyl N-(1,3-benzothiazol-2-yl) dithio imidocarbonate

2,2'-bis(2-benzothiazolylamino)-6,6'-bibenzoxazole
127933-31-7

2,2'-bis(2-benzothiazolylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With sodium hydroxide In N,N-dimethyl-formamide for 9h; Heating;68%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

N-p-Bromphenylsulfonyliminodithiokohlensaeuredimethylester
32323-85-6

N-p-Bromphenylsulfonyliminodithiokohlensaeuredimethylester

C26H16Br2N4O6S2
1342307-99-6

C26H16Br2N4O6S2

Conditions
ConditionsYield
Stage #1: 3,3'-dihydroxybenzidine With sodium hydroxide In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: N-p-Bromphenylsulfonyliminodithiokohlensaeuredimethylester In N,N-dimethyl-formamide for 8h; Reflux; Inert atmosphere;
70%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

dimethyl N-<(2-chlorophenyl)sulfonyl>dithiocarbonimidate
84346-43-0

dimethyl N-<(2-chlorophenyl)sulfonyl>dithiocarbonimidate

C26H16Cl2N4O6S2
1342307-95-2

C26H16Cl2N4O6S2

Conditions
ConditionsYield
Stage #1: 3,3'-dihydroxybenzidine With sodium hydroxide In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: dimethyl N-<(2-chlorophenyl)sulfonyl>dithiocarbonimidate In N,N-dimethyl-formamide for 8h; Reflux; Inert atmosphere;
72%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

4-methyl-benzoyl chloride
874-60-2

4-methyl-benzoyl chloride

2,2'-di-p-tolyl-6,6'-bibenzoxazole
16155-59-2

2,2'-di-p-tolyl-6,6'-bibenzoxazole

Conditions
ConditionsYield
Stage #1: 3,3'-dihydroxybenzidine; 4-methyl-benzoyl chloride In 1-methyl-pyrrolidin-2-one at 0℃; for 1h; Inert atmosphere;
Stage #2: With pyridine In 1-methyl-pyrrolidin-2-one for 2h; Inert atmosphere; Reflux;
72%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

N-[bis(methylthio)methylene]-p-toluenesulfonamide
2651-15-2

N-[bis(methylthio)methylene]-p-toluenesulfonamide

2,2'-bis(tosylamino)-6,6'-bibenzoxazole
127933-43-1

2,2'-bis(tosylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With sodium hydroxide In N,N-dimethyl-formamide73%
Stage #1: 3,3'-dihydroxybenzidine With sodium hydroxide In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: N-[bis(methylthio)methylene]-p-toluenesulfonamide In N,N-dimethyl-formamide for 8h; Reflux; Inert atmosphere;
70%
N--4-chlorobenzenesulfonamide
13068-12-7

N--4-chlorobenzenesulfonamide

3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

2,2'-bis(4-chlorophenylsulfonylamino)-6,6'-bibenzoxazole
127933-44-2

2,2'-bis(4-chlorophenylsulfonylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
Stage #1: 3,3'-dihydroxybenzidine With sodium hydroxide In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: N--4-chlorobenzenesulfonamide In N,N-dimethyl-formamide for 8h; Reflux; Inert atmosphere;
75%
With sodium hydroxide In N,N-dimethyl-formamide73%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

C10H9N3O2S3
71156-12-2

C10H9N3O2S3

2,2'-bis(6-nitro-2-benzothiazolylamino)-6,6'-bibenzoxazole
127933-34-0

2,2'-bis(6-nitro-2-benzothiazolylamino)-6,6'-bibenzoxazole

Conditions
ConditionsYield
With sodium hydroxide In N,N-dimethyl-formamide75%
3,3'-dihydroxybenzidine
2373-98-0

3,3'-dihydroxybenzidine

N--2-methylbenzenesulfonamide
32323-87-8

N--2-methylbenzenesulfonamide

C28H22N4O6S2
1342307-93-0

C28H22N4O6S2

Conditions
ConditionsYield
Stage #1: 3,3'-dihydroxybenzidine With sodium hydroxide In N,N-dimethyl-formamide at 20℃; for 0.5h;
Stage #2: N--2-methylbenzenesulfonamide In N,N-dimethyl-formamide for 8h; Reflux; Inert atmosphere;
75%

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