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Hebei Nengqian Chemical Import and Export Co., LTD

With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufacturin

orellanine

Cas:37338-80-0

Min.Order:1 Kilogram

FOB Price: $1.0 / 10.0

Type:Trading Company

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Shanghai Upbio Tech Co.,Ltd

1.In No Less 10 years exporting experience. you 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 Specializ

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:1 Gram

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Qingdao Beluga Import and Export Co., LTD

orellanine CAS:37338-80-0 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 organic intermediates,

orellanine CAS:37338-80-0

Cas:37338-80-0

Min.Order:1 Gram

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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

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:1 Kilogram

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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

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:0

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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

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:10 Gram

FOB Price: $100.0

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Hangzhou J&H Chemical Co., Ltd.

J&H CHEM is one of China's leading providers of integrated fine chemical services including offering, research and development, Custom manufacturing business, as well as other Value-added customer services, for diversified range products of chemicals

orellanine

Cas:37338-80-0

Min.Order:0

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Henan Tianfu Chemical Co., Ltd.

1.Our services：A.Supply sampleB.The packing also can be according the customers` requirmentC.Any inquiries will be replied within 24 hoursD.we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate.

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:0

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Xian Changyue Biological Technology Co., Ltd.

best seller Application:API

orellanine

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Manufacturers

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Antimex Chemical Limied

Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:0

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DB BIOTECH CO., LTD

best seller Application:API

orellanine

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Trading Company

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Henan Kanbei Chemical Co.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

orellanine

Cas:37338-80-0

Min.Order:0

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Shanghai Chinqesen Biotechnology Co., Ltd.

Good Quality Package:1kg/bag Application:Medical or chemical Transportation:Air/Train/Sea Port:Shenzhen

37338-80-0

Cas:37338-80-0

Min.Order:0

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Hebei Muhuang Technology Co., Ltd

best seller Application:API

orellanine

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Trading Company

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ZHEJIANG JIUZHOU CHEM CO.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

orellanine

Cas:37338-80-0

Min.Order:0

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Type:Trading Company

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HuBei Ipure Biotech CO.,ltd

HuBei ipure is a diversified product production and operation enterprise, with API, pharma intermediates, and other fine chemicals as well as R&D and pigments development and sales as one of the large enterprises, with more than 130 acres of pl

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide/

Cas:37338-80-0

Min.Order:1 Gram

FOB Price: $1.0

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Chengdu Push Bio-technology Co., Ltd

Chengdu Push Bio-technology Co., Ltd. provides more than 4,000 natural monomeric substances, including approximately 6,000 products at different grades, specifications and purities. We have specialized in the R&D of medicinally active ingredients sta

Orellanine

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Chungking Joyinchem Co., Ltd.

Joyinchem have been committed to chemical supply for several years and have built good cooperation records with multinational chemical corporations and importers from all over the world. Our services include:-Spot goods-Contract manufacturing-Custom

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:0

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Nanjing Raymon Biotech Co., Ltd.

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxideAppearance:Off white to slight yellow solid Storage:Store in dry and cool condition Package:25kg or according to cutomer's demand Application:Chemical research/Pharmaceutical intermediates Transportation

[2,2'-Bipyridine]-3,3',4,4'-tetrol,1,1'-dioxide

Cas:37338-80-0

Min.Order:0

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Hebei Ruishun Trade Co.,Ltd

Supply top quality products with a reasonable price Application:api

37338-80-0

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Trading Company

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Sparrow Chemical Co.,Ltd

Our company provides the best service for our customers. Under the premise of ensuring quality and delivery date, give customers the best price. The company is more willing to meet our customers. If you want to visit our factories and warehouses, we

Orellanine

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Trading Company

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LEANCARE Limited

Orellanine

Cas:37338-80-0

Min.Order:0

Negotiable

Type:Lab/Research institutions

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View More

Synthetic route

orelline
72016-31-0

orelline

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
With dihydrogen peroxide for 8h; Ambient temperature;87%
for 336h; Irradiation; isomerisation also without irradiation;
tetra-O-methylorellanine
101664-54-4

tetra-O-methylorellanine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
With hydrogen bromide; acetic acid for 5h; Heating;77%
With hydrogen bromide at 120℃; for 5h;60%
With hydrogen bromide at 120℃;60%
With hydrogen bromide In acetic acid for 4h;30%
3,3',4,4'-tetramethoxy-2,2'-bipyridine
101664-55-5

3,3',4,4'-tetramethoxy-2,2'-bipyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: m-chloroperbenzoic acid
2: m-chloroperbenzoic acid
3: 60 percent / 48percent HBr / 120 °C
View Scheme
Multi-step reaction with 2 steps
1: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
2: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 2 steps
1: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
2: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
Multi-step reaction with 2 steps
1: 41 percent / Ac2O, H2O2
2: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-bromo-3,4-dimethoxy pyridine
104819-52-5

2-bromo-3,4-dimethoxy pyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 87 percent / NiCl2, P(Ph)3, Zn / dimethylformamide / 50 °C
2: m-chloroperbenzoic acid
3: m-chloroperbenzoic acid
4: 60 percent / 48percent HBr / 120 °C
View Scheme
Multi-step reaction with 3 steps
1: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
2: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
3: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
2-bromo-3,4-dimethoxy pyridine-N-oxide
105011-83-4

2-bromo-3,4-dimethoxy pyridine-N-oxide

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: phosphorus tribromide
2: 87 percent / NiCl2, P(Ph)3, Zn / dimethylformamide / 50 °C
3: m-chloroperbenzoic acid
4: m-chloroperbenzoic acid
5: 60 percent / 48percent HBr / 120 °C
View Scheme
Multi-step reaction with 4 steps
1: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
2: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
3: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
4: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
3,4,3',4'-Tetramethoxy-[2,2']bipyridinyl 1-oxide
112516-35-5

3,4,3',4'-Tetramethoxy-[2,2']bipyridinyl 1-oxide

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: m-chloroperbenzoic acid
2: 60 percent / 48percent HBr / 120 °C
View Scheme
4-methoxypyridin-3-amine
33631-09-3

4-methoxypyridin-3-amine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 80 percent / Br2, conc. HCl / 1 h
3: 42 percent / NiCl2*6H2O/(C6H5)3P, Zn / 4 h / 50 °C
4: 27 percent / 30percent H2O2, (CH3CO)2O / 14 h / 100 °C
5: 92 percent / Na / 0.25 h / Heating
6: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
2-chloro-3-fluoropyridine
17282-04-1

2-chloro-3-fluoropyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 64 percent / (CH3CO)2O, 30percent H2O2 / 12 h / 80 °C
2: 44 percent / conc. H2SO4/H2SO4 (20percent SO3) (1:1); H2SO4 (20percent SO3)/100percent HNO3 / 1 h / Heating
3: 1.) Na, 2.) PCl3 / 1.) MeOH, 24 h, room temp. 2.) chloroform, 2 h, reflux
4: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
5: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
6: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 7 steps
1: 64 percent / (CH3CO)2O, 30percent H2O2 / 12 h / 80 °C
2: 44 percent / conc. H2SO4/H2SO4 (20percent SO3) (1:1); H2SO4 (20percent SO3)/100percent HNO3 / 1 h / Heating
3: 83 percent / Na / methanol / 72 h / Ambient temperature
4: 80 percent / PCl3 / CHCl3 / 2 h / Heating
5: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
6: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
7: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 7 steps
1: 54 percent / acetic anhydride, 30percent H2O2
2: 42 percent / 100percent HNO3/ 100percent H2SO4 containing 10percent SO3
3: Ambient temperature
4: PCl3
5: 25 percent / dimethylformamide / 4 h / 50 °C
6: 41 percent / Ac2O, H2O2
7: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-Chlor-3-fluorpyridin-1-oxid
85386-94-3

2-Chlor-3-fluorpyridin-1-oxid

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: 44 percent / conc. H2SO4/H2SO4 (20percent SO3) (1:1); H2SO4 (20percent SO3)/100percent HNO3 / 1 h / Heating
2: 1.) Na, 2.) PCl3 / 1.) MeOH, 24 h, room temp. 2.) chloroform, 2 h, reflux
3: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
4: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
5: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 6 steps
1: 44 percent / conc. H2SO4/H2SO4 (20percent SO3) (1:1); H2SO4 (20percent SO3)/100percent HNO3 / 1 h / Heating
2: 83 percent / Na / methanol / 72 h / Ambient temperature
3: 80 percent / PCl3 / CHCl3 / 2 h / Heating
4: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
5: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
6: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 6 steps
1: 42 percent / 100percent HNO3/ 100percent H2SO4 containing 10percent SO3
2: Ambient temperature
3: PCl3
4: 25 percent / dimethylformamide / 4 h / 50 °C
5: 41 percent / Ac2O, H2O2
6: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-chloro-3,4-dimethoxypyridine
101664-59-9

2-chloro-3,4-dimethoxypyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
2: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
3: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 3 steps
1: 25 percent / dimethylformamide / 4 h / 50 °C
2: 41 percent / Ac2O, H2O2
3: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-Chlor-3,4-dimethoxypyridin-1-oxid
101664-58-8

2-Chlor-3,4-dimethoxypyridin-1-oxid

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 80 percent / PCl3 / CHCl3 / 2 h / Heating
2: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
3: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
4: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 4 steps
1: PCl3
2: 25 percent / dimethylformamide / 4 h / 50 °C
3: 41 percent / Ac2O, H2O2
4: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-Chlor-3-fluor-4-nitropyridin-1-oxid
101664-56-6

2-Chlor-3-fluor-4-nitropyridin-1-oxid

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 1.) Na, 2.) PCl3 / 1.) MeOH, 24 h, room temp. 2.) chloroform, 2 h, reflux
2: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
3: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
4: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 5 steps
1: 83 percent / Na / methanol / 72 h / Ambient temperature
2: 80 percent / PCl3 / CHCl3 / 2 h / Heating
3: 52 percent / NiCl2*6H2O/(C6H5)3P, Zn, KI / dimethylformamide / 12 h / 50 °C
4: 53 percent / 30percent H2O2, (CH3CO)2O, / 14 h / 100 °C
5: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
Multi-step reaction with 5 steps
1: Ambient temperature
2: PCl3
3: 25 percent / dimethylformamide / 4 h / 50 °C
4: 41 percent / Ac2O, H2O2
5: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-bromo-3-fluoro-4-methoxypyridine
109613-98-1

2-bromo-3-fluoro-4-methoxypyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 42 percent / NiCl2*6H2O/(C6H5)3P, Zn / 4 h / 50 °C
2: 27 percent / 30percent H2O2, (CH3CO)2O / 14 h / 100 °C
3: 92 percent / Na / 0.25 h / Heating
4: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
2-bromo-4-methoxy-pyridin-3-amine
109613-97-0

2-bromo-4-methoxy-pyridin-3-amine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 5 steps
2: 42 percent / NiCl2*6H2O/(C6H5)3P, Zn / 4 h / 50 °C
3: 27 percent / 30percent H2O2, (CH3CO)2O / 14 h / 100 °C
4: 92 percent / Na / 0.25 h / Heating
5: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
3,3'-Difluor-4,4'-dimethoxy-2,2'-bipyridin
109613-99-2

3,3'-Difluor-4,4'-dimethoxy-2,2'-bipyridin

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 27 percent / 30percent H2O2, (CH3CO)2O / 14 h / 100 °C
2: 92 percent / Na / 0.25 h / Heating
3: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
3,3'-Difluor-4,4'-dimethoxy-<2,2'-bipyridin>-1,1'-dioxid
109613-94-7

3,3'-Difluor-4,4'-dimethoxy-<2,2'-bipyridin>-1,1'-dioxid

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 92 percent / Na / 0.25 h / Heating
2: 77 percent / 33percent HBr/CH3COOH / 5 h / Heating
View Scheme
3-HYDROXYPYRIDINE
109-00-2

3-HYDROXYPYRIDINE

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 9 steps
1: 35 percent / Br2, 10percent aq. NaOH / 24 h
2: 1.) NaOCH3 / 1.) MeOH, DMF; 2.) DMF, RT, 1.5 h
3: 90 percent / m-chloroperbenzoic acid / CHCl3 / 2.5 h / Ambient temperature
4: 48 percent / fuming HNO3, conc. H2SO4 / 1 h / 60 °C
5: 78 percent / NaOCH3 / methanol / 2 h / Ambient temperature
6: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
7: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
8: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
9: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
3-hydroxypyridine N-oxide
6602-28-4

3-hydroxypyridine N-oxide

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1: 1.) Br2; 2.) NaOCH3 / 1.) 10percent aq. NaOH, 24 h; 2.) MeOH, DMF, RT, 1.5 h
2: 48 percent / fuming HNO3, conc. H2SO4 / 1 h / 60 °C
3: 78 percent / NaOCH3 / methanol / 2 h / Ambient temperature
4: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
5: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
6: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
7: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
2-bromo-pyridin-3-ol
6602-32-0

2-bromo-pyridin-3-ol

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1: 1.) NaOCH3 / 1.) MeOH, DMF; 2.) DMF, RT, 1.5 h
2: 90 percent / m-chloroperbenzoic acid / CHCl3 / 2.5 h / Ambient temperature
3: 48 percent / fuming HNO3, conc. H2SO4 / 1 h / 60 °C
4: 78 percent / NaOCH3 / methanol / 2 h / Ambient temperature
5: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
6: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
7: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
8: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
2-bromo-3-methoxypyridine
24100-18-3

2-bromo-3-methoxypyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 7 steps
1: 90 percent / m-chloroperbenzoic acid / CHCl3 / 2.5 h / Ambient temperature
2: 48 percent / fuming HNO3, conc. H2SO4 / 1 h / 60 °C
3: 78 percent / NaOCH3 / methanol / 2 h / Ambient temperature
4: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
5: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
6: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
7: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
2-bromo-3-methoxypyridine N-oxide
104819-48-9

2-bromo-3-methoxypyridine N-oxide

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: 48 percent / fuming HNO3, conc. H2SO4 / 1 h / 60 °C
2: 78 percent / NaOCH3 / methanol / 2 h / Ambient temperature
3: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
4: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
5: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
6: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
2-bromo,3-methoxy,4-nitropyridine-N-oxide
104819-50-3

2-bromo,3-methoxy,4-nitropyridine-N-oxide

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: 78 percent / NaOCH3 / methanol / 2 h / Ambient temperature
2: 85 percent / PBr3 / CHCl3 / 0.5 h / 60 °C
3: 1.) NiCl2*6H2O, Ph3P, Zn powder / 1.) DMF, 50 deg C, 1 h; 2.) DMF, 50 deg C, 2 h; other cond.: Cu, KI, DMF or Pd/C, phase transfer conditions
4: 85 percent / m-chloroperbenzoic acid / CHCl3 / 8 h / Ambient temperature
5: 60 percent / 48percent aq. HBr / 5 h / 120 °C
View Scheme
pyridin-3-ylamine
462-08-8

pyridin-3-ylamine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 9 steps
1: 82 percent / 15percent H2O2, conc. HCl
2: 38 percent
3: 54 percent / acetic anhydride, 30percent H2O2
4: 42 percent / 100percent HNO3/ 100percent H2SO4 containing 10percent SO3
5: Ambient temperature
6: PCl3
7: 25 percent / dimethylformamide / 4 h / 50 °C
8: 41 percent / Ac2O, H2O2
9: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
2-chloro-3-aminopyridine
6298-19-7

2-chloro-3-aminopyridine

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1: 38 percent
2: 54 percent / acetic anhydride, 30percent H2O2
3: 42 percent / 100percent HNO3/ 100percent H2SO4 containing 10percent SO3
4: Ambient temperature
5: PCl3
6: 25 percent / dimethylformamide / 4 h / 50 °C
7: 41 percent / Ac2O, H2O2
8: 30 percent / 33percent HBr, acetic acid / acetic acid / 4 h
View Scheme
3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

orelline
72016-31-0

orelline

Conditions
ConditionsYield
at 220℃; under 0.01 Torr; sublimation;50%
for 336h; Irradiation;
diazomethane
186581-53-3, 908094-01-9

diazomethane

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

A

tetra-O-methylorellanine
101664-54-4

tetra-O-methylorellanine

B

1,3,3',4'-Tetramethoxy<2,2'-bipyridin>-4(1H)-on-1'-oxid
109613-96-9

1,3,3',4'-Tetramethoxy<2,2'-bipyridin>-4(1H)-on-1'-oxid

C

1,1',3,3'-Tetramethoxy<2,2'-bipyridin>-4,4'(1H,1'-H)-dion
109613-95-8

1,1',3,3'-Tetramethoxy<2,2'-bipyridin>-4,4'(1H,1'-H)-dion

Conditions
ConditionsYield
In methanol; diethyl etherA 18%
B 16%
C 16%
...Expand
3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

C10H8N2O5

C10H8N2O5

Conditions
ConditionsYield
at 180 - 200℃;
3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide
37338-80-0

3,3',4,4'-tetrahydroxy-2,2'-bipyridine-1,1'-dioxide

orellanine anion radical

orellanine anion radical

Conditions
ConditionsYield
With phosphate buffer; oxygen for 0.0166667h; Ambient temperature; tyrosinase;

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