Chengdu Biopurify Phytochemicals 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 Medic
Known for its best quality and competitve price, this chemicals we offered is widely appreciated by our customers.Appearance:White powder Storage:keep sealed and keep from direct light Package:According client's requirements Application:pharmaceutica
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inquiryThe 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
17-year experience in Phytochemicals Each product has passed very strict tests (NMR\MS\HPLC) Agents in 13 countries Certified by ISO 9001:2008 quality management system Leader Supplier of Botanical Reference Materials in China
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inquiryName PROCYANIDIN B2 CAS No 29106-49-8 MF C30H26O12 Purity 99% Appearance white powder Appearance: white powder Storage:Store in co
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inquiry1.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
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About Product Details Items Specifications Test Results Appearance White to white crystalline powde
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inquiryBasic Information Product Categories Biochemical >> Natural products English name is Proanthocyanidin B2 Aliases Procyanidin B2; Procyanidol B2; (2R,2'R,3R,3'R,4R)-2,2'-Bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-[4,8
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inquiryOur 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 present,
PROCYANIDIN B2 CAS:29106-49-8 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 intermedia
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inquiryCompany 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
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inquiryWhy Choose Us: 1. Factory direct sales, so we can provide the competitive price and high quality product base on 8 years of production and R&D experience. 2. It is available in stock for quick shipment.Products could be packaged according to cu
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
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inquiryfactory?direct?saleAppearance:White Powder Storage:Store In Dry, Cool And Ventilated Place Package:25kg/drum, also according to the clients requirement Application:It is widely used as a thickener, emulsifier and stabilizer Transportation:By Sea Or B
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inquiryTriumph has the complete production of G- KG - MT service chain,we can make the new technology into productivity quickly in the research and development of new products. Main Business Custom Synthesis:
3',4',5,7-tetra-O-benzyl-8-bromoepicatechin-4β,8-(3',4',5,7-tetra-O-benzylepicatechin)
procyanidin B2
Conditions | Yield |
---|---|
With hydrogen; sodium hydrogencarbonate; triethylamine; palladium dihydroxide In methanol; water; ethyl acetate at 20℃; for 18h; | 99% |
5,7,3',4'-tetra-O-benzyl-(-)-epicatechin-(4β,8)-[5,7,3',4'-tetra-O-benzyl-(-)-epicatechin]
procyanidin B2
Conditions | Yield |
---|---|
With hydrogen; palladium dihydroxide In tetrahydrofuran; methanol; water at 20℃; for 12h; | 86% |
With palladium hydroxide on carbon; hydrogen In water; ethyl acetate at 20℃; under 760.051 Torr; for 18h; | 85% |
With 20 % Pd(OH)2/C; hydrogen In water; ethyl acetate at 20℃; for 18h; | 85% |
4β-benzylthioepicatechin
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
procyanidin B2
Conditions | Yield |
---|---|
silver tetrafluoroborate In tetrahydrofuran at 0℃; for 1h; Condensation; | 37% |
procyanidin B2-3,3'-di-O-gallate
procyanidin B2
Conditions | Yield |
---|---|
With tannase In water at 37℃; for 1h; |
procyanidin B2-3,3'-di-O-gallate
A
procyanidin B2
B
3,4,5-trihydroxybenzoic acid
Conditions | Yield |
---|---|
With tannase at 37℃; for 1h; 0.05 M acetate buffer (pH 5.0); |
kandelin B-1
A
procyanidin B2
Conditions | Yield |
---|---|
With acetic acid; phenylmethanethiol In ethanol for 8h; Heating; |
(-)-epicatechin-<4β->8>-(-)-epicatechin-<4β->8>-(-)-epicatechin-<4β->8>-(-)-epicatechin
phenylmethanethiol
A
procyanidin B2
B
4β-benzylthioepicatechin
C
(2R,3R,4R)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-<(2R,3S,4S)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-benzylthioflavan-8-yl>flavan
D
procyanidin C1
E
procyanidin C-1 4''-benzylthioether
F
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
acetic acid In ethanol for 6h; Product distribution; Heating; other reaction time; |
epicatechin-(4β->8)-epicatechin-(4β->8)-epicatechin-(4β->8)-epicatechin-(4β->8)-epicatechin
phenylmethanethiol
A
procyanidin B2
B
4β-benzylthioepicatechin
C
(2R,3R,4R)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-<(2R,3S,4S)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-benzylthioflavan-8-yl>flavan
D
procyanidin C1
E
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
acetic acid In ethanol for 6h; Product distribution; Heating; other reaction time; |
epicatechin (4β,8)5-hexamer
phenylmethanethiol
A
procyanidin B2
B
4β-benzylthioepicatechin
C
(2R,3R,4R)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-<(2R,3S,4S)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-benzylthioflavan-8-yl>flavan
D
procyanidin C1
E
epicatechin-(4β->8)-epicatechin-(4β->8)-epicatechin-(4β->8)-epicatechin-(4β->8)-epicatechin
F
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
acetic acid In ethanol for 5h; Product distribution; Heating; other reaction time; |
phenylmethanethiol
A
procyanidin B2
B
procyanidin B-5 4'-benzykthioether
Conditions | Yield |
---|---|
In ethanol; acetic acid for 8h; Heating; degradation; |
aesculitannin E
phenylmethanethiol
A
procyanidin B2
B
proanthocyanidin A-2 4'-benzylthioether
C
4β-benzylthioepicatechin
D
cinnamtannin B1 4''-benzylthioether
E
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
With hydrogenchloride for 2h; Heating; partial thiolytic degradation; | A 7 mg B 30 mg C 15 mg D 284 mg E 10 mg |
aesculitannin F
phenylmethanethiol
A
procyanidin B2
B
4β-benzylthioepicatechin
C
C37H30O12S
D
C52H42O18S
E
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
With hydrogenchloride for 2h; Heating; partial thiolytic degradation; | A 16 mg B 8 mg C 12 mg D 152 mg E 5 mg |
procyanidin B2
Conditions | Yield |
---|---|
With W-2 Raney-Ni |
(2R,3R,4S)-2,3-cis-3,4-trans-3',4',5,7-tetramethoxyflavan-3,4-diol
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
A
procyanidin B2
B
procyanidin B5
Conditions | Yield |
---|---|
With hydrogenchloride Ambient temperature; |
procyanidin C1
phenylmethanethiol
A
procyanidin B2
B
4β-benzylthioepicatechin
C
(2R,3R,4R)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-<(2R,3S,4S)-2,3-cis-3,4-trans-3,5,7,3',4'-pentahydroxy-4-benzylthioflavan-8-yl>flavan
D
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
In ethanol at 94℃; |
(-)-epicatechin-<4β->6>-(-)-epicatechin-<4β->8>-(-)-epicatechin
phenylmethanethiol
A
procyanidin B2
B
4β-benzylthioepicatechin
C
epicatechin-(4β<*>6)-epicatechin-(4β<*>S)-benzylthioether
D
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
In ethanol at 94℃; |
Conditions | Yield |
---|---|
With hydrogenchloride In 1,4-dioxane; water at 25℃; for 48h; |
A
procyanidin B2
B
procyanidin B1
C
procyanidin B5
D
catechin
Conditions | Yield |
---|---|
In ethanol; water at 27℃; for 108h; fermentation; Saccharomyces rouxii; Further byproducts given; |
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
A
procyanidin B2
B
ent-epicatechin-(4α->8)-epicatechin
Conditions | Yield |
---|---|
With acetic acid In ethanol at 95℃; for 22h; |
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
A
procyanidin B2
B
ent-epicatechin-(4α->8)-epicatechin
Conditions | Yield |
---|---|
Multistep reaction; |
A
procyanidin B2
B
procyanidin B1
C
procyanidin B5
D
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
In ethanol; water at 27℃; for 108h; fermentation; Saccharomyces rouxii; Further byproducts given; |
procyanidin B2
Conditions | Yield |
---|---|
Stage #1: [4,8']-2,3-cis-3,4-trans:2',3'-cis-octa-O-benzyl-3-O-acetyl-bi-(-)-epicatechin With potassium carbonate In methanol Stage #2: With hydrogen; palladium dihydroxide In tetrahydrofuran; methanol; water Further stages.; |
3’,4’,5,7-tetra-O-benzyl-4β-(2-hydroxyethyloxy)epicatechin
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 99 percent / N-bromosuccinimide / CH2Cl2 / -78 - 20 °C 2: 43 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 3 h / 20 °C 3: 99 percent / H2; Et3N; NaHCO3 / Pd(OH)2/C / H2O; methanol; ethyl acetate / 18 h / 20 °C View Scheme |
3’,4’,5,7-tetra-O-benzyl-4β-(2-hydroxyethyloxy)-8-bromoepicatechin
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 43 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 3 h / 20 °C 2: 99 percent / H2; Et3N; NaHCO3 / Pd(OH)2/C / H2O; methanol; ethyl acetate / 18 h / 20 °C View Scheme |
5,7,3',4'-tetra-O-benzylepicatechin
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1.1: DDQ / CH2Cl2 / 3 h / 20 °C 1.2: 63 percent / DMAP / CH2Cl2 / 0.33 h 2.1: 99 percent / N-bromosuccinimide / CH2Cl2 / -78 - 20 °C 3.1: 43 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 3 h / 20 °C 4.1: 99 percent / H2; Et3N; NaHCO3 / Pd(OH)2/C / H2O; methanol; ethyl acetate / 18 h / 20 °C View Scheme | |
Multi-step reaction with 2 steps 1: 43 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 3 h / 20 °C 2: 99 percent / H2; Et3N; NaHCO3 / Pd(OH)2/C / H2O; methanol; ethyl acetate / 18 h / 20 °C View Scheme | |
Multi-step reaction with 2 steps 1: TMSOTf / CH2Cl2 / 0.08 h / -78 °C 2: 86 percent / hydrogen / Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 12 h / 20 °C View Scheme | |
Multi-step reaction with 3 steps 1: 52 percent / DDQ / CH2Cl2 / 20 °C 2: 53 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 20 °C 3: H2 / 20 percent Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 750.06 Torr View Scheme | |
Multi-step reaction with 2 steps 1: 53 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 20 °C 2: H2 / 20 percent Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 750.06 Torr View Scheme |
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1.1: 82 percent / K2CO3 / dimethylformamide / 0 - 20 °C 2.1: DDQ / CH2Cl2 / 3 h / 20 °C 2.2: 63 percent / DMAP / CH2Cl2 / 0.33 h 3.1: 99 percent / N-bromosuccinimide / CH2Cl2 / -78 - 20 °C 4.1: 43 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 3 h / 20 °C 5.1: 99 percent / H2; Et3N; NaHCO3 / Pd(OH)2/C / H2O; methanol; ethyl acetate / 18 h / 20 °C View Scheme | |
Multi-step reaction with 3 steps 1: 82 percent / K2CO3 / dimethylformamide / 0 - 20 °C 2: 43 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 3 h / 20 °C 3: 99 percent / H2; Et3N; NaHCO3 / Pd(OH)2/C / H2O; methanol; ethyl acetate / 18 h / 20 °C View Scheme |
(2R,3S,4S)-5,7,3',4'-tetrabenzyloxy-4-(2"-ethoxyethoxy)flavan-3-ol
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: TMSOTf / CH2Cl2 / 0.08 h / -78 °C 2: 86 percent / hydrogen / Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 12 h / 20 °C View Scheme |
5,7,3',4'-tetra-O-benzyl-(+)-catechin
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 90 percent / Dess-Martin periodinane; H2O / CH2Cl2 / 20 °C 2: 81 percent / L-Selectride; LiBr / tetrahydrofuran / -78 °C 3: 52 percent / DDQ / CH2Cl2 / 20 °C 4: 53 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 20 °C 5: H2 / 20 percent Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 750.06 Torr View Scheme | |
Multi-step reaction with 4 steps 1: 90 percent / Dess-Martin periodinane; H2O / CH2Cl2 / 20 °C 2: 81 percent / L-Selectride; LiBr / tetrahydrofuran / -78 °C 3: 53 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 20 °C 4: H2 / 20 percent Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 750.06 Torr View Scheme |
(+)-(2R)-5,7-bis(benzyloxy)-2-[3,4-bis(benzyloxy)phenyl]chroman-3-one
procyanidin B2
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: 81 percent / L-Selectride; LiBr / tetrahydrofuran / -78 °C 2: 52 percent / DDQ / CH2Cl2 / 20 °C 3: 53 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 20 °C 4: H2 / 20 percent Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 750.06 Torr View Scheme | |
Multi-step reaction with 3 steps 1: 81 percent / L-Selectride; LiBr / tetrahydrofuran / -78 °C 2: 53 percent / TiCl4 / CH2Cl2; tetrahydrofuran / 20 °C 3: H2 / 20 percent Pd(OH)2/C / tetrahydrofuran; methanol; H2O / 750.06 Torr View Scheme |
procyanidin B2
dimethyl sulfate
5,7,3',4'-tetra-O-methylepicatechin-4β,8-(5,7,3',4'-tetra-O-methylepicatechin)
Conditions | Yield |
---|---|
With potassium carbonate In various solvent(s) at 60℃; for 4h; Methylation; | 41% |
diazomethane
procyanidin B2
5,7,3',4'-tetra-O-methylepicatechin-4β,8-(5,7,3',4'-tetra-O-methylepicatechin)
Conditions | Yield |
---|---|
In methanol; diethyl ether at -15℃; for 48h; | |
at -15℃; for 48h; | |
Stage #1: procyanidin B2 With hydrogen; palladium dihydroxide In tetrahydrofuran; methanol under 750.075 Torr; for 0.666667h; Hydrogenolysis; Stage #2: diazomethane In diethyl ether at 20℃; for 0.133333h; Methylation; Further stages.; | 4.8 mg |
procyanidin B2
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
With hydrogenchloride for 0.5h; heating on a boiling water bath; | |
Multi-step reaction with 2 steps 1: ethanol / 1 h / boiling water bath 2: Raney nickel / ethanol / 2 h / Ambient temperature View Scheme |
procyanidin B2
A
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
B
catechin
Conditions | Yield |
---|---|
phosphoric acid In water; acetonitrile at 25 - 40℃; Rate constant; acid catalysis at different pH-values; |
procyanidin B2
A
(-)-epicatechin-(2β→O→7,4β→8)-(-)-catechin
B
(2R,3R:8S,9R,10R)-3,5,9-Trihydroxy-2,8-bis-(3,4-dihydroxyphenyl)-10-(2,4,6-trihydroxyphenyl)-2,3-cis-8,9-trans-9,10-cis-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromene
C
(2R,3R:8S,9S,10R)-3,5,9-Trihydroxy-2,10-bis-(3,4-dihydroxyphenyl)-8-(2,4,6-trihydroxyphenyl)-2,3-cis-8,9-cis-9,10-trans-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromene
D
(2S,3R:8S,9S,10R)-3,5,9-Trihydroxy-2,10-bis-(3,4-dihydroxyphenyl)-8-(2,4,6-trihydroxyphenyl)-2,3-trans-8,9-cis-9,10-trans-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromene
Conditions | Yield |
---|---|
With sodium hydrogencarbonate at 40℃; for 6.5h; Product distribution; Mechanism; | A 17 mg B 6 mg C 29 mg D 15 mg |
With sodium hydrogencarbonate at 40℃; for 6.5h; | A 17 mg B 6 mg C 29 mg D 15 mg |
procyanidin B2
aesculitannin C
Conditions | Yield |
---|---|
With dihydrogen peroxide; sodium hydrogencarbonate In ethanol for 12h; Ambient temperature; | 32 mg |
procyanidin B2
acetic anhydride
epicatechin-(4β->8)-epicatechin decaacetate
Conditions | Yield |
---|---|
With pyridine | |
In pyridine for 24h; Ambient temperature; | |
With pyridine Yield given; |
procyanidin B2
mercaptoacetic acid
B
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
In ethanol for 1h; boiling water bath; |
procyanidin B2
phenylmethanethiol
A
4β-benzylthioepicatechin
B
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
Conditions | Yield |
---|---|
With acetic acid In ethanol Heating; Yield given. Yields of byproduct given; |
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