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Vertexyn (Nanjing) Bioworks Co., Ltd.

Product Advantages: 1. Protocatechic acid is a competitive product of our company, and free samples can be applied. 2. It is available in stock for quick shipment. 3. Biological synthesis, natural, healthy, can be safely used in medicine, dyes, fe

Chemsigma International Co.,Ltd.

bulk production Chemsigma International Co.,Ltd. is a chemical manufacturer, specialize in custom synthesis and organic chemical manufacturing for overseas customers, in the field of API, pharmaceutical intermediates, chemical intermediates, fine ch

3,4-Dihydroxybenzoic Acid

Cas:99-50-3

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Viablife Biotech CO.,LTD

High quality, best service,competitive price are our principle 1.Low price & high quality products (G-KG) & first-class service are waiting for our clients 2.Professional transport team to ensure the goods safety and on time arrived your

protocatechuic acid cas:99-50-3 3,4-Dihydroxybenzoic acid

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Trading Company

inquiry

Jinan Finer Chemical Co., Ltd

Product description: Product name 3,4-Dihydroxybenzoic acid CAS number 99-50-3 Assay ≥99% Appearance Off-white to yellowish powder Capacity 200mt/year Application Pharmaceuti

3,4-Dihydroxybenzoic acid

Cas:99-50-3

Min.Order:10 Gram

FOB Price: $12.0

Type:Lab/Research institutions

inquiry

Dayang Chem (Hangzhou) Co.,Ltd.

As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem's R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis ch

3,4-Dihydroxybenzoic acid Manufacturer/High quality/Best price/In stock

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Hangzhou Dingyan Chem Co., Ltd

Items Limits Results Quantity 1.5kg 1.57kg Appearance White solid

High purity 99-50-3 4-(4-Bromopyrazol-1-yl)piperidine-1-carboxylic acid tert-butyl ester

Cas:99-50-3

Min.Order:1 Gram

FOB Price: $100.0 / 500.0

Type:Trading Company

inquiry

Simagchem Corporation

Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our

High quality 3,4-Dihydroxybenzoicacid supplier in China

Cas:99-50-3

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

inquiry

Kono Chem Co.,Ltd

Superiority KONO is a leading manufacturer and supplier of chemicals in China. We develop ,produce and distribute high quality pharmaceuticals, intermediates, special chemicals and other fine chemicals. We could give you: 1.Best quality in your r

High quality 3,4-Dihydroxybenzoic acid CAS 99-50-3 99% with best price

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $230.0 / 260.0

Type:Other

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Hangzhou JINLAN Pharm-Drugs Technology Co., Ltd

We can provide GMP validation service that complies with SFDA, FDA, WHO and EU EMPA.Excellent registration team could help us easlily to register our products in different countries.If you and your customer are interested in some products or need CMO

3,4-dihydroxybenzoic acid manufacturer/supplier

Cas:99-50-3

Min.Order:1 Gram

Negotiable

Type:Manufacturers

inquiry

Hebei yanxi chemical co.,LTD.

1 Factory price 2 High quality 3 Good service chengdu and import and export trade co., LTD., who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw m

3,4-Dihydroxybenzoic acid / Protocatehuic acid

Cas:99-50-3

Min.Order:25 Kilogram

FOB Price: $1.0 / 2.0

Type:Manufacturers

inquiry

Xi'an Quanao Biotech Co., Ltd.

Herbal Extracts Protocatechuic Acid 98% powder Xi'an Quanao Biotech Co., Ltd. is is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, peptide,Nootropis etc API, food and feed additives, herbal extrac

Herbal Extracts Protocatechuic Acid 98% powder

Cas:99-50-3

Min.Order:100 Kilogram

FOB Price: $110.0 / 120.0

Type:Manufacturers

inquiry

Hangzhou Think Chemical Co. Ltd

3,4-Dihydroxybenzoic Acid[CAS:99-50-3] HANGZHOU THINK CHEMICAL CO., LTD. (THINKCHEM) is an integrative corporation of trade, research and contract manufacture. With about ten years of business experiences on the marketing & distribut

High purity 3,4-Dihydroxybenzoic Acid stock

Cas:99-50-3

Min.Order:200 Gram

Negotiable

Type:Other

inquiry

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 3,4-Dihydroxybenzoicacid

Cas:99-50-3

Min.Order:1

Negotiable

Type:Other

inquiry

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

Natural Extract 98% Protocatechuic acid 99-50-3 HACCP Manufacturer

Cas:99-50-3

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

inquiry

Xi`an Eastling Biotech Co., Ltd.

99-50-3 - Physico-chemical Properties Molecular Formula C7H6O4 Molar Mass 154.12 Density 1.54 Melting Point 197-200 °C (dec.) (lit.) Boling Point 237.46°C (rough estimate)

Factory high quality 3,4-Dihydroxybenzoic acid

Cas:99-50-3

Min.Order:1 Gram

FOB Price: $30.0 / 40.0

Type:Lab/Research institutions

inquiry

Shanghai Seasonsgreen Chemical Co.,Ltd

Shanghai Seasonsgreen Chemical is a high-tech research and development, production, sale and custom synthesis set in one high-tech chemical products enterprises. Our sales and marketing division is located in Shanghai, serving international pharmaceu

lower price High quality Protocatechuic acid

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Manufacturers

inquiry

Chemwill Asia Co., Ltd.

Our main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block

Protocatechuic acid

Cas:99-50-3

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

Henan Tianfu Chemical Co., Ltd.

TIANFUCHEM--99-50-3--High purity 3,4-Dihydroxybenzoic acid factory price Our company was built in 2009 with an ISO certificate.In the past 10 years, we have grown up as a famous fine chemicals supplier in China And we had established stabl

TIANFUCHEM--99-50-3--High purity 3,4-Dihydroxybenzoic acid factory price

Cas:99-50-3

Min.Order:1 Metric Ton

FOB Price: $2000.0

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

High CAS 99-50-3 with best quality

Cas:99-50-3

Min.Order:10 Gram

FOB Price: $146.0 / 176.0

Type:Trading Company

inquiry

Wuhan Han Sheng New Material Technology Co.,Ltd

Our Advantage: high quality with competitive price High quality standard: BP/USP/EP Enterprise standard All purity customized Fast and safe delivery We have reliable forwarder who can help us deliver our goods more fast and safe. We

3,4-Dihydroxybenzoic acid

Cas:99-50-3

Min.Order:10 Kilogram

Negotiable

Type:Trading Company

inquiry

Henan Sinotech Import&Export Corporation

Superlist Name:3,4-Dihydroxybenzoic acid Molecular Formula:C7H6O4 CAS No.: 99-50-3 Purity:99% Synonyms:Protocatechuic acid Molecular Weight:154.12 Appearance:white powder Appearance: white powder Storage: Preserve in well-closed, light-

3,4-Dihydroxybenzoic acid

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

inquiry

Hubei Langyou International Trading Co., Ltd

1. Guaranteed purity; 2. Large quantity in stock; 3. Largest manufacturer; 4. Best service after shipment with email; 5. High quality & competitive price; Appearance:white or off-white powder Storage:Store in sealed containers

Top quality Pharmaceutical Grade Protocatechuic acid CAS 99-50-3

Cas:99-50-3

Min.Order:100 Gram

Negotiable

Type:Other

inquiry

Hangzhou Sartort Biopharma Co., Ltd

Appearance:beige to brown?powder Storage:Store below +30°C. Package:25kg/drum Application:A phenolic acid antioxidant and chemopreventive agent Transportation:Express/Sea/Air Port:any port in china

Protocatechuic acid with high quality

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Lab/Research institutions

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

3,4-Dihydroxybenzoic acid 99-50-3

Cas:99-50-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

Basic Information Synonym 3,4-DIHYDROXYBENZOIC ACID/Protocatechuic acid/Protocatehuic acid/4-Carboxy-1,2-dihydroxybenzene CAS No. 99-50-3 Formula C7H6O4 Molecular Weight 154.12 g/mol Appa

Protocatechuic Acid CAS: 99-50-3

Cas:99-50-3

Min.Order:1 Gram

FOB Price: $16.0 / 160.0

Type:Trading Company

inquiry

Leader Biochemical Group

Overview of Our Factories Our Factories production lines Our Factories R&D ability Our Factories warehouse Our Factorie

China Biggest Factory & Manufacturer supply 3,4-Dihydroxy Benzoic Acid

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $30.0 / 35.0

Type:Lab/Research institutions

inquiry

Hubei CuiRan Biotechnology Co., Ltd

Hubei CuiRan Biotechnology Co., Ltd is a leading company in the research, development, manufacture and marketing of High Quality Phytochemicals and Extracts(especially Active Ingredients from Traditional Chinese Medicine,Traditional Chinese Medicine)

protocatechuic acid

Cas:99-50-3

Min.Order:10 Milligram

Negotiable

Type:Lab/Research institutions

inquiry

Baoji Guokang Healthchem co.,ltd

Our company has been in existence for 10 years since its establishment. We have our own unique team. The company integrates independent research and development, production and sales. We have established famous brands at home and abroad. At prese

Antibacterial effect, 3,4-Dihydroxybenzoic acid CAS:99-50-3

Cas:99-50-3

Min.Order:1 Kilogram

FOB Price: $70.9 / 78.2

Type:Trading Company

inquiry

Qingdao Beluga Import and Export Co., LTD

Protocatechuic acid CAS:99-50-3 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 organic intermed

Protocatechuic acid CAS:99-50-3

Cas:99-50-3

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

3,4-Dihydroxybenzoic acid

Cas:99-50-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

3-methoxy-4-hydroxybenzoic acid
121-34-6

3-methoxy-4-hydroxybenzoic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With aluminium(III) iodide; diisopropyl-carbodiimide In acetonitrile at 80℃; for 18h;100%
With aluminium(III) iodide; diisopropyl-carbodiimide In acetonitrile at 80℃; for 18h;100%
With 1,4-dithio-D,L-threitol; phosphite dehydrogenase; phosphite ion; iron(II) sulfate; NADH In dimethyl sulfoxide at 30℃; for 7h; pH=7.5; Catalytic behavior; Reagent/catalyst; Solvent; Enzymatic reaction;77%
vanillin
121-33-5

vanillin

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With potassium hydroxide In water at 260℃; for 0.75h;94%
With potassium carbonate durch Schmelzen;
With potassium hydroxide durch Schmelzen;
With potassium hydroxide at 250℃;
3-hydroxy-4-methoxybenzoate
6702-50-7

3-hydroxy-4-methoxybenzoate

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With aluminium(III) iodide; diisopropyl-carbodiimide In acetonitrile at 80℃; for 18h;89%
4-oxocyclohexanecarboxylic acid
874-61-3

4-oxocyclohexanecarboxylic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With iodine; oxygen; dimethyl sulfoxide at 80℃; for 12h;84%
4-hydroxy-3-methoxybenzoic acid methyl ester
3943-74-6

4-hydroxy-3-methoxybenzoic acid methyl ester

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

3,4-dihydroxybenzoic acid methyl ester
2150-43-8

3,4-dihydroxybenzoic acid methyl ester

Conditions
ConditionsYield
With aluminium(III) iodide; ethyl acetate; diisopropyl-carbodiimide In acetonitrile at 80℃; for 5h; Temperature;A 14%
B 72%
With aluminium(III) iodide; diisopropyl-carbodiimide In acetonitrile at 40℃; for 18h; Temperature; Overall yield = 89 %; Overall yield = 0.684 g;A 64%
B 31%
4-formyl-3-hydroxybenzoic acid
619-12-5

4-formyl-3-hydroxybenzoic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With dihydrogen peroxide In water; acetonitrile at 35℃; for 12h; Dakin Phenol Oxidation;71%
acetic anhydride
108-24-7

acetic anhydride

3',4'-dihydroxy-7-dimethoxyflavylium chloride
89475-36-5

3',4'-dihydroxy-7-dimethoxyflavylium chloride

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

4-methoxysalicylic acid
2237-36-7

4-methoxysalicylic acid

Conditions
ConditionsYield
With ruthenium(IV) oxide; sodium periodate 1) 5 h, room temp., pyridine; 2) acetic ester, water, 20 min : decomposition reaction;A 70%
B 67%
3-hydroxy-4-methoxybenzoate
6702-50-7

3-hydroxy-4-methoxybenzoate

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

3,4-dihydroxybenzoic acid methyl ester
2150-43-8

3,4-dihydroxybenzoic acid methyl ester

Conditions
ConditionsYield
With aluminium(III) iodide; diisopropyl-carbodiimide In acetonitrile at 40℃; for 18h;A 64%
B 31%
3-oxo-cyclohexanecarboxylic acid
16205-98-4

3-oxo-cyclohexanecarboxylic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With iodine; oxygen; dimethyl sulfoxide at 80℃; for 12h; regioselective reaction;63%
(-)-3-dehydroshikimic acid
2922-42-1

(-)-3-dehydroshikimic acid

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

3,4,5-trihydroxybenzoic acid
149-91-7

3,4,5-trihydroxybenzoic acid

Conditions
ConditionsYield
With copper diacetate In water; acetic acid at 40℃; for 36h; Oxidation; aromatization;A 0.7%
B 62%
With copper diacetate; oxygen; zinc(II) oxide In acetic acid at 50℃; under 760.051 Torr; for 14h; Kinetics; Product distribution; Further Variations:; Reagents; Oxidation; aromatization;
3,4-dihydroxybenzaldehyde
139-85-5

3,4-dihydroxybenzaldehyde

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With potassium bromate; hydrogenchloride; potassium bromide In water for 12h; Time;55%
With potassium carbonate durch Schmelzen;
With potassium hydroxide at 150 - 190℃; Ausschluss von Sauerstoff;
methanol
67-56-1

methanol

3-dehydroquinic acid
10534-44-8

3-dehydroquinic acid

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

methyl (4S,5R)-4,5-dihydroxy-3-oxo-1-cyclohexene-1-carboxylate
84806-48-4

methyl (4S,5R)-4,5-dihydroxy-3-oxo-1-cyclohexene-1-carboxylate

C

methyl 3-dehydroquinate
57764-14-4

methyl 3-dehydroquinate

Conditions
ConditionsYield
With Amberlite IR 120 for 1.5h; Heating;A 30%
B 20%
C 50%
cyanidin 3-O-glucopyranoside chloride

cyanidin 3-O-glucopyranoside chloride

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

glucopyranosyl 2-O-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxyphenylacetate

glucopyranosyl 2-O-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxyphenylacetate

C14H16O10

C14H16O10

Conditions
ConditionsYield
With 2,2'-azobis-(2,4-dimethylvaleronitrile) In water; acetonitrile at 60℃; for 6h;A 34%
B 13.6%
C 15%
quercetol
117-39-5

quercetol

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With potassium superoxide; tetraethylammonium bromide In N,N-dimethyl-formamide at 20℃; for 18h;17%
With potassium carbonate beim Schmelzen;
With potassium carbonate
With potassium hydroxide
With potassium hydroxide Heating;
(-)-3-dehydroshikimic acid
2922-42-1

(-)-3-dehydroshikimic acid

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

tricarallylic acid
99-14-9

tricarallylic acid

C

3,4,5-trihydroxybenzoic acid
149-91-7

3,4,5-trihydroxybenzoic acid

D

dihydrogallic acid
184105-29-1

dihydrogallic acid

E

2-hydroxyresorcinol
87-66-1

2-hydroxyresorcinol

Conditions
ConditionsYield
With air; Na1.5H1.5PO4 at 40℃; for 50h; Rate constant; Mechanism; other oxidant, var. time;A 12 % Spectr.
B 14 % Spectr.
C 13%
D n/a
E 3 % Spectr.
4-hydroxy-benzoic acid
99-96-7

4-hydroxy-benzoic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With peroxygenase; dihydrogen peroxide In acetonitrile at 20℃; for 0.5h; pH=5; pH-value; Enzymatic reaction;12.4%
With Aspergillus carbonarius peroxygenase gene; dihydrogen peroxide; ascorbic acid In aq. phosphate buffer; acetonitrile at 20℃; for 0.25h; pH=6; Catalytic behavior; Enzymatic reaction;1%
With potassium peroxomonosulphate Kochen des Reaktionsproduktes mit verd. Salzsaeure;
Multi-step reaction with 2 steps
1: bromine
2: concentrated KOH-solution
View Scheme
methanol
67-56-1

methanol

caffeic acid
331-39-5

caffeic acid

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

3,4-dihydroxybenzaldehyde
139-85-5

3,4-dihydroxybenzaldehyde

C

(E)-2-hydroxy-2-(3,4-dihydroxyphenyl)ethanaloxime

(E)-2-hydroxy-2-(3,4-dihydroxyphenyl)ethanaloxime

D

(E)-2-(3,4-dihydroxyphenyl)-2-methoxyethanaloxime

(E)-2-(3,4-dihydroxyphenyl)-2-methoxyethanaloxime

Conditions
ConditionsYield
With acetate buffer; sodium nitrite at 20℃; for 4h; pH=4; Further byproducts.;A 6%
B 9%
C 10%
D 5%
cyanidin-3-O-glucoside

cyanidin-3-O-glucoside

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

C21H22O13

C21H22O13

C

jaboticabin acid (2-O-(3,4-dihydroxybenzoyl)-2,4,6-dihydroxyphenyl)acetic acid

jaboticabin acid (2-O-(3,4-dihydroxybenzoyl)-2,4,6-dihydroxyphenyl)acetic acid

Conditions
ConditionsYield
With water; dihydrogen peroxide In acetonitrile at 40℃; for 8h; Mechanism; Reagent/catalyst; Solvent; Time;A 9%
B n/a
C n/a
D-erythrose
583-50-6

D-erythrose

A

5-hydroxymethyl-2-furfuraldehyde
67-47-0

5-hydroxymethyl-2-furfuraldehyde

B

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

C

1-(3,4-dihydroxyphenyl)ethan-1-one
1197-09-7

1-(3,4-dihydroxyphenyl)ethan-1-one

D

1-[5-(hydroxymethyl)furan-2-yl]ethan-1-one
55087-82-6

1-[5-(hydroxymethyl)furan-2-yl]ethan-1-one

E

3,4-dihydroxybenzaldehyde
139-85-5

3,4-dihydroxybenzaldehyde

F

3-methylbenzene-1,2-diol
488-17-5

3-methylbenzene-1,2-diol

Conditions
ConditionsYield
With acetate buffer for 45h; Product distribution; Heating;A 0.04%
B 0.03%
C 0.01%
D 0.15%
E 0.01%
F 0.03%
piperonal
120-57-0

piperonal

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With tetrachloromethane; chlorine Einwirkung im Sonnenlicht und Verseifen des entstandenen Chlorids mit Wasser;
oxalyl dichloride
79-37-8

oxalyl dichloride

1,2-dimethoxybenzene
91-16-7

1,2-dimethoxybenzene

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

4-allylguaiacol
97-53-0

4-allylguaiacol

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
bei der Kalischmelze;
Multi-step reaction with 3 steps
1: KOH; water
2: K2cr2O7; glacial acetic acid / 100 °C
3: hydriodic acid / 120 - 130 °C / im geschlossenen Rohr
View Scheme
3-(4-hydroxy-3-methoxyphenyl)acrylic acid
1135-24-6

3-(4-hydroxy-3-methoxyphenyl)acrylic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
bei der Kalischmelze;
Piperonylic acid
94-53-1

Piperonylic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With hydrogenchloride at 170℃; im geschlossenen Rohr;
With water at 210℃; im geschlossenen Rohr;
With aluminium trichloride; chlorobenzene
2-oxo-benzo[1,3]dioxole-5-carboxylic acid
861605-32-5

2-oxo-benzo[1,3]dioxole-5-carboxylic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With water
With salt solution
1-methyl-4-nitrosobenzene
623-11-0

1-methyl-4-nitrosobenzene

3-bromo-4-hydroxybenzylaldehyde
2973-78-6

3-bromo-4-hydroxybenzylaldehyde

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

4-hydroxy-benzaldehyde
123-08-0

4-hydroxy-benzaldehyde

C

3,4-dihydroxybenzaldehyde
139-85-5

3,4-dihydroxybenzaldehyde

D

4-hydroxy-benzoic acid
99-96-7

4-hydroxy-benzoic acid

Conditions
ConditionsYield
at 160℃;
at 190℃;
(2,4‐dihydroxyphenyl)(3,4,5‐trihydroxyphenyl)methanone
10425-09-9

(2,4‐dihydroxyphenyl)(3,4,5‐trihydroxyphenyl)methanone

A

3,5-dihydroxyphenol
108-73-6

3,5-dihydroxyphenol

B

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With sulfuric acid at 120℃;
With potassium hydroxide
(2,4‐dihydroxyphenyl)(3,4,5‐trihydroxyphenyl)methanone
10425-09-9

(2,4‐dihydroxyphenyl)(3,4,5‐trihydroxyphenyl)methanone

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
With potassium hydroxide
With sulfuric acid at 120℃;
With hydrogenchloride at 120℃;
2-methoxy-4-(2-propenyl)phenoxyacetic acid
6331-61-9

2-methoxy-4-(2-propenyl)phenoxyacetic acid

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Conditions
ConditionsYield
bei der Kalischmelze;
4-ethoxy-3-hydroxybenzaldehyde
2539-53-9

4-ethoxy-3-hydroxybenzaldehyde

4-ethoxy-3-methoxybenzoic acid
3535-30-6

4-ethoxy-3-methoxybenzoic acid

A

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

B

4-ethoxy-3-hydroxy-benzoic acid
90536-50-8

4-ethoxy-3-hydroxy-benzoic acid

Conditions
ConditionsYield
With hydrogen bromide Reaktion ueber mehrere Stufen;
methanol
67-56-1

methanol

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

3,4-dihydroxybenzoic acid methyl ester
2150-43-8

3,4-dihydroxybenzoic acid methyl ester

Conditions
ConditionsYield
With thionyl chloride Heating;100%
With sulfuric acid for 8h; Reflux;100%
With sulfuric acid under 760.051 Torr; Reflux;100%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

Cyclohexyl isocyanide
931-53-3

Cyclohexyl isocyanide

4-methoxy-benzylamine
2393-23-9

4-methoxy-benzylamine

para-tert-butoxycarbonyloxybenzaldehyde
87188-50-9

para-tert-butoxycarbonyloxybenzaldehyde

C34H40N2O8

C34H40N2O8

Conditions
ConditionsYield
Stage #1: 4-methoxy-benzylamine; para-tert-butoxycarbonyloxybenzaldehyde In ethanol; 2,2,2-trifluoroethanol for 4h; Inert atmosphere;
Stage #2: 3,4-Dihydroxybenzoic acid; Cyclohexyl isocyanide In ethanol; 2,2,2-trifluoroethanol for 48h; Inert atmosphere;
100%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

ethanol
64-17-5

ethanol

Ethyl protocatechuate
3943-89-3

Ethyl protocatechuate

Conditions
ConditionsYield
With sulfuric acid Heating;99%
With sulfuric acid at 50℃; for 3h;98%
With sulfuric acid98%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

5,8-dichloro-2,3,4,9-tetrahydro-1H-carbazole

5,8-dichloro-2,3,4,9-tetrahydro-1H-carbazole

7,10-dichloro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

7,10-dichloro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;99%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

benzyl chloride
100-44-7

benzyl chloride

3,4-(bisbenzyloxy)benzoic acid benzyl ester
882427-72-7

3,4-(bisbenzyloxy)benzoic acid benzyl ester

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 60℃; Inert atmosphere;98%
With potassium carbonate In N,N-dimethyl-formamide at 60℃; Inert atmosphere;98%
With sodium carbonate In N,N-dimethyl-formamide for 48h; Reflux;85%
With potassium carbonate In N,N-dimethyl-formamide at 20 - 85℃; for 12h; Inert atmosphere;
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

tert-butyldimethylsilyl chloride
18162-48-6

tert-butyldimethylsilyl chloride

3,4‐bis(tert‐butyldimethylsilyloxy)benzoic acid
154083-18-8

3,4‐bis(tert‐butyldimethylsilyloxy)benzoic acid

Conditions
ConditionsYield
With 1H-imidazole In N,N-dimethyl-formamide at 20℃; for 0.5h;98%
With 1H-imidazole In N,N-dimethyl-formamide at 20℃; for 4h; Inert atmosphere;76.7%
With 1H-imidazole In N,N-dimethyl-formamide for 66h; Inert atmosphere;75%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

6,8-difluoro-2,3,4,9-tetrahydro-1H-carbazole

6,8-difluoro-2,3,4,9-tetrahydro-1H-carbazole

7,9-difluoro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

7,9-difluoro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;96%
6-(trifluoromethyl)-2,3,4,9,-tetrahydro-1H-carbazole
2805-84-7

6-(trifluoromethyl)-2,3,4,9,-tetrahydro-1H-carbazole

3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

C20H16F3NO4

C20H16F3NO4

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;96%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

8‐methyl‐2‐tosyl‐2,3,4,5‐tetrahydro‐1H‐pyrido[4,3‐b]indole

8‐methyl‐2‐tosyl‐2,3,4,5‐tetrahydro‐1H‐pyrido[4,3‐b]indole

9-methyl-13-tosyl-6H-5a,10b-(ethanoiminomethano)benzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

9-methyl-13-tosyl-6H-5a,10b-(ethanoiminomethano)benzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;96%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

N,N'-Dibenzylethylenediamine
140-28-3

N,N'-Dibenzylethylenediamine

1,4-dibenzyl-1,2,3,4-tetrahydroquinoxaline-6,7-dione
1418195-30-8

1,4-dibenzyl-1,2,3,4-tetrahydroquinoxaline-6,7-dione

Conditions
ConditionsYield
In aq. phosphate buffer at 20℃; pH=7; Electrochemical reaction;95.5%
In aq. phosphate buffer; acetonitrile at 25℃; for 20h; pH=7.0; Reagent/catalyst; Electrochemical reaction;
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-alanine
35661-39-3

N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-alanine

Fmoc-L-Arg-OH
91000-69-0

Fmoc-L-Arg-OH

protocatechuic-RA-NH2

protocatechuic-RA-NH2

Conditions
ConditionsYield
Stage #1: N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-alanine With (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine In 1-methyl-pyrrolidin-2-one for 3h;
Stage #2: With piperidine In 1-methyl-pyrrolidin-2-one
Stage #3: 3,4-Dihydroxybenzoic acid; Fmoc-L-Arg-OH Further stages;
95.215%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

acetic anhydride
108-24-7

acetic anhydride

3,4-Diacetoxy-benzoesaeure
58534-64-8

3,4-Diacetoxy-benzoesaeure

Conditions
ConditionsYield
With pyridine at 0℃; for 2h; Inert atmosphere;95%
With sulfuric acid at 70℃;86.5%
for 2h; Heating;84%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

1-Tetradecanol
112-72-1

1-Tetradecanol

tetradecanyl 3,4-dihydroxybenzoate

tetradecanyl 3,4-dihydroxybenzoate

Conditions
ConditionsYield
With sulfuric acid In tetrahydrofuran at 45 - 65℃; for 120 - 240h; Darkness; Molecular sieve;95%
With dicyclohexyl-carbodiimide In tetrahydrofuran at 20℃;36%
With dicyclohexyl-carbodiimide In tetrahydrofuran
With dicyclohexyl-carbodiimide In 1,4-dioxane at 5℃; for 48h;
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

tert-butyl alcohol
75-65-0

tert-butyl alcohol

3,4-dihydroxy-benzoic acid tert-butyl ester
760947-24-8

3,4-dihydroxy-benzoic acid tert-butyl ester

Conditions
ConditionsYield
With dmap at 20℃; for 72h;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

6,8-dichloro-2,3,4,9-tetrahydro-1H-carbazole
101349-10-4

6,8-dichloro-2,3,4,9-tetrahydro-1H-carbazole

C19H15Cl2NO4

C19H15Cl2NO4

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In acetonitrile for 0.0833333h; Cooling with ice;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

8-chloro-2,3,4,9-tetrahydro-1H-carbazole
53475-34-6

8-chloro-2,3,4,9-tetrahydro-1H-carbazole

C19H16ClNO4

C19H16ClNO4

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In acetonitrile for 0.0833333h; Cooling with ice;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

8‐methyl‐2‐tosyl‐2,3,4,5‐tetrahydro‐1H‐pyrido[4,3‐b]indole

8‐methyl‐2‐tosyl‐2,3,4,5‐tetrahydro‐1H‐pyrido[4,3‐b]indole

C26H24N2O6S

C26H24N2O6S

Conditions
ConditionsYield
With methanesulfonic acid; di-tert-butyl peroxide; iron phthalocyanine; acetic acid In acetonitrile for 0.0833333h; Cooling with ice;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

ethyl 1,3,4,9‐tetrahydro‐2H‐pyrido[3,4‐b]indole‐2‐carboxylate
89424-03-3

ethyl 1,3,4,9‐tetrahydro‐2H‐pyrido[3,4‐b]indole‐2‐carboxylate

C21H20N2O6

C21H20N2O6

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In acetonitrile for 0.0833333h; Cooling with ice;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

2‐(phenylsulfonyl)‐2,3,4,9‐tetrahydro‐1H‐pyrido[3,4‐b]indole

2‐(phenylsulfonyl)‐2,3,4,9‐tetrahydro‐1H‐pyrido[3,4‐b]indole

C24H20N2O6S

C24H20N2O6S

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In acetonitrile for 0.25h; Cooling with ice;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

6,8-dichloro-2,3,4,9-tetrahydro-1H-carbazole
101349-10-4

6,8-dichloro-2,3,4,9-tetrahydro-1H-carbazole

7,9-dichloro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

7,9-dichloro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

8-chloro-2,3,4,9-tetrahydro-1H-carbazole
53475-34-6

8-chloro-2,3,4,9-tetrahydro-1H-carbazole

7-chloro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

7-chloro-6H-5a,10b-butanobenzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

2‐(phenylsulfonyl)‐2,3,4,9‐tetrahydro‐1H‐pyrido[3,4‐b]indole

2‐(phenylsulfonyl)‐2,3,4,9‐tetrahydro‐1H‐pyrido[3,4‐b]indole

14-(phenylsulfonyl)-6H-10b,5a-(ethanoiminomethano)benzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

14-(phenylsulfonyl)-6H-10b,5a-(ethanoiminomethano)benzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.25h;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

ethyl 1,3,4,9‐tetrahydro‐2H‐pyrido[3,4‐b]indole‐2‐carboxylate
89424-03-3

ethyl 1,3,4,9‐tetrahydro‐2H‐pyrido[3,4‐b]indole‐2‐carboxylate

14-(ethoxycarbonyl)-6H-10b,5a-(ethanoiminomethano)benzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

14-(ethoxycarbonyl)-6H-10b,5a-(ethanoiminomethano)benzo[5,6][1,4]dioxino[2,3-b]indole-2-carboxylic acid

Conditions
ConditionsYield
With tert.-butylhydroperoxide; methanesulfonic acid; iron(II) phthalocyanine; acetic acid In water; acetonitrile at 5℃; for 0.0833333h;95%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

1-dodecyl alcohol
112-53-8

1-dodecyl alcohol

3,4-dihydroxybenzoic acid dodecyl ester

3,4-dihydroxybenzoic acid dodecyl ester

Conditions
ConditionsYield
With sulfuric acid In tetrahydrofuran at 45 - 65℃; for 120 - 240h; Darkness; Molecular sieve;94%
With dicyclohexyl-carbodiimide In tetrahydrofuran at 0℃; for 20h;81%
With dicyclohexyl-carbodiimide In tetrahydrofuran at 20℃;33%
With dicyclohexyl-carbodiimide In 1,4-dioxane at 5℃; for 48h;
With sulfuric acid Fischer-Speier Esterification;
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

benzyl bromide
100-39-0

benzyl bromide

3,4-(bisbenzyloxy)benzoic acid benzyl ester
882427-72-7

3,4-(bisbenzyloxy)benzoic acid benzyl ester

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide Inert atmosphere;94%
With potassium carbonate In N,N-dimethyl-formamide for 20h; Inert atmosphere;92%
With potassium carbonate In N,N-dimethyl-formamide at 20℃;91%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

difluoroethanol
359-13-7

difluoroethanol

C9H8F2O4

C9H8F2O4

Conditions
ConditionsYield
With thionyl chloride Inert atmosphere; Reflux;94%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

chloro-methylsulfanyl-methane
2373-51-5

chloro-methylsulfanyl-methane

C9H10O4S

C9H10O4S

Conditions
ConditionsYield
With triethylamine In acetonitrile Reflux;93.4%
3,4-Dihydroxybenzoic acid
99-50-3

3,4-Dihydroxybenzoic acid

butan-1-ol
71-36-3

butan-1-ol

protocatechuic acid n-butyl ester
37622-53-0

protocatechuic acid n-butyl ester

Conditions
ConditionsYield
With dicyclohexyl-carbodiimide In 1,4-dioxane at 5℃; for 48h;93%
With sulfuric acid In tetrahydrofuran at 45 - 65℃; for 120 - 240h; Darkness; Molecular sieve;82%
With dicyclohexyl-carbodiimide In tetrahydrofuran at 20℃;64%
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