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
Cas:154-23-4
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inquiryItems Standard Result Appearance White powder Conforms Assay,HPLC 98%min
Cas:154-23-4
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Type:Manufacturers
inquiryWelcome 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
Cas:154-23-4
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inquiryHebei yanxi chemical co., LTD is a professional research, development and production Cyromazine、lead diacetate trihydrate /Lead acetate trihydrateC、 2-phenylacetamide 、 4-Aminophenyl-1-phenethylpiperidine 、Citric acid monohydrate 、 Citric acid/c
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Type:Manufacturers
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
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
Cas:154-23-4
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inquiryShanghai 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
Cas:154-23-4
Min.Order:1 Kilogram
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Type:Manufacturers
inquiryAbout Product Details Cianidanol Chemical Properti
Cas:154-23-4
Min.Order:1 Kilogram
FOB Price: $1.0 / 5.0
Type:Lab/Research institutions
inquiryOur 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
Cas:154-23-4
Min.Order:1 Kilogram
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inquiryOur Advantage Rich Experience Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term. Quality service Company cooperates with research institutes. We strictly con
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inquiryWITH 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
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inquiryOur 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
Cas:154-23-4
Min.Order:10 Kilogram
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Type:Trading Company
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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Min.Order:1 Kilogram
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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 prese
Cas:154-23-4
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Type:Trading Company
inquiryCianidanol CAS:154-23-4 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,
Cas:154-23-4
Min.Order:1 Gram
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Type:Lab/Research institutions
inquiryHello, 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
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
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
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Nanjing Spring & Autumn Biological Engineering Co., Ltd. Which was founded at 2008, has an R & D team composed very experienced natural products chemists. The company is a high-tech enterprise engaged in functional health care products raw ma
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
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:154-23-4
Min.Order:10 Gram
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inquiryWe are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov
Cas:154-23-4
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Type:Lab/Research institutions
inquiryOur Advantages A. International Top level TechnologyOur company owned biomedicine experts are famous at home and abroad with rich experience in research and development in the field of efficient chiral functional molecules research and development an
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Min.Order:1 Milligram
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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
Cas:154-23-4
Min.Order:1 Kilogram
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Type:Trading Company
inquiryHubei 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)
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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
Cas:154-23-4
Min.Order:1 Gram
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Type:Lab/Research institutions
inquiry1.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
Cas:154-23-4
Min.Order:1 Metric Ton
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Type:Trading Company
inquiry5,7,3',4'-tetra-O-benzyl-(+)-catechin
catechin
Conditions | Yield |
---|---|
With hydrogen; palladium on activated charcoal In methanol | 92% |
With 10 wt% Pd(OH)2 on carbon In methanol; water at 20℃; for 10h; | 90% |
A
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
B
catechin
Conditions | Yield |
---|---|
With palladium 10% on activated carbon; hydrogen In methanol; ethyl acetate at 20 - 55℃; | A 55% B n/a |
2-[(2S,3S)-3-(3'',4''-dihydroxyphenyl)-2,3-dihydroxypropyl]-1,3,5-benzenetriol
catechin
Conditions | Yield |
---|---|
With triphenylphosphine; diethylazodicarboxylate In tetrahydrofuran at 20℃; for 1.5h; Mitsunobu reaction; | 50% |
Conditions | Yield |
---|---|
With acetic acid In ethanol at 105℃; for 18h; | A 40% B n/a |
Conditions | Yield |
---|---|
With acetic acid In ethanol at 105℃; for 18h; | A 40% B n/a |
Conditions | Yield |
---|---|
With acetic acid In ethanol at 105℃; for 18h; | A 40% B n/a |
Conditions | Yield |
---|---|
With acetic acid In ethanol at 105℃; for 18h; | A 40% B n/a |
Conditions | Yield |
---|---|
With acetic acid In ethanol at 105℃; for 18h; | A 40% B n/a |
procyanidin B3
catechin
Conditions | Yield |
---|---|
With sodium cyanoborohydride In trifluoroacetic acid at 0℃; for 1h; | 35% |
With hydrogenchloride for 0.5h; heating on a boiling water bath; |
(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
B
catechin
Conditions | Yield |
---|---|
With deuterated sodium cyanoborohydride In trifluoroacetic acid at 0℃; for 2h; | A 25% B 26% |
With deuterated sodium cyanoborohydride; trifluoroacetic acid at 0℃; for 6h; |
(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
A
(2R)-1-(2,4-Dihydroxyphenyl)-3-(3,4-dihydroxyphenyl)-propan-2-ol
B
catechin
Conditions | Yield |
---|---|
With sodium cyanoborohydride; trifluoroacetic acid at 0℃; for 3h; | A 25% B 24% |
With sodium cyanoborohydride In trifluoroacetic acid at 0℃; for 3h; | A 25% B 24% |
With sodium cyanoborohydride; trifluoroacetic acid at 0℃; for 6h; Mechanism; other profisetinidin biflavanoids; | A 16% B 15% |
procyanidin B1
A
(2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol
B
catechin
Conditions | Yield |
---|---|
With sodium cyanoborohydride In trifluoroacetic acid at 0℃; for 1h; Title compound not separated from byproducts; | A 21% B 20% |
(2R,3S,4R)-2,3-trans-3,4-cis-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
A
(2R)-1-(2,4-Dihydroxyphenyl)-3-(3,4-dihydroxyphenyl)-propan-2-ol
B
catechin
Conditions | Yield |
---|---|
With sodium cyanoborohydride; trifluoroacetic acid at 0℃; for 6h; | A 18% B 17% |
With sodium cyanoborohydride In trifluoroacetic acid at 0℃; for 6h; | A 18% B 17% |
procyanidin B3
A
8,9-cis-9,10-trans-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromene
B
(2R,3R,4S,2'R,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,8']bichromenyl-3,5,7,3',5',7'-hexaol
C
(2R,3R,4S,2'R,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,6']bichromenyl-3,5,7,3',5',7'-hexaol
D
catechin
Conditions | Yield |
---|---|
With sodium hydrogencarbonate; sodium carbonate In water at 45℃; for 1.5h; Further byproducts given; | A n/a B n/a C 9% D 9% |
With sodium hydrogencarbonate; sodium carbonate In water at 45℃; for 1.5h; Further byproducts given; | A n/a B n/a C n/a D 9% |
procyanidin B3
A
8,9-cis-9,10-trans-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromene
B
(2R,3R,4S,2'R,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,8']bichromenyl-3,5,7,3',5',7'-hexaol
C
(2R,3R,4S,2'R,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,6']bichromenyl-3,5,7,3',5',7'-hexaol
D
(2R,3R,4S,2'S,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,6']bichromenyl-3,5,7,3',5',7'-hexaol
E
catechin
Conditions | Yield |
---|---|
With sodium hydrogencarbonate; sodium carbonate In water at 45℃; for 1.5h; | A n/a B n/a C n/a D n/a E 9% |
procyanidin B3
A
8,9-cis-9,10-trans-3,4,9,10-tetrahydro-2H,8H-pyrano<2,3-h>chromene
B
(2R,3R,4S,2'R,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,8']bichromenyl-3,5,7,3',5',7'-hexaol
C
(2R,3R,4S,2'S,3'S)-4,2'-Bis-(3,4-dihydroxy-phenyl)-3,4,3',4'-tetrahydro-2H,2'H-[2,6']bichromenyl-3,5,7,3',5',7'-hexaol
D
catechin
Conditions | Yield |
---|---|
With sodium hydrogencarbonate; sodium carbonate In water at 45℃; for 1.5h; Further byproducts given; | A n/a B n/a C n/a D 9% |
(2R,3S)-2,3-trans-6-<(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxyflavan-4-yl>-3,3',4',5,7-pentahydroxyflavan
A
(2R)-1-(2,4-Dihydroxyphenyl)-3-(3,4-dihydroxyphenyl)-propan-2-ol
B
catechin
Conditions | Yield |
---|---|
With sodium cyanoborohydride; trifluoroacetic acid at 0℃; for 6h; | A 4% B 4% |
With sodium cyanoborohydride In trifluoroacetic acid at 0℃; for 6h; | A 4% B 4% |
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 B1
A
4β-benzylthioepicatechin
B
4α-Benzylthioepicatechin
C
catechin
Conditions | Yield |
---|---|
With acetic acid In ethanol for 2h; Heating; | A 108 mg B 3 mg C 78 mg |
Conditions | Yield |
---|---|
With sodium hydrogensulfite |
procyanidin B3
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 40℃; Rate constant; acid-catalysed hydrolysis at pH 0.55 value; |
Conditions | Yield |
---|---|
With methanol at 60℃; for 6h; Yield given. Yields of byproduct given; |
Conditions | Yield |
---|---|
With potassium carbonate In water Heating; | |
With anthocyanidin reductase from Vitis vinifera; β-nicotinamide adenine dinucleotide phosphate sodium salt at 30℃; for 0.5h; pH=7.5; aq. buffer; Enzymatic reaction; | 30 %Chromat. |
procyanidin B4
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 40℃; Rate constant; acid-catalysed hydrolysis at pH 0.55 value; |
6-iodo-(+)-catechin
(+)-mollisacacidin
A
(2R,3S,4R)-2,3-trans-3,4-cis-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
B
(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
C
(2R,3S)-2,3-trans-6-<(2R,3S,4R)-2,3-trans-3,4-cis-3,3',4',7-tetrahydroxyflavan-4-yl>-3,3',4',5,7-pentahydroxyflavan
D
catechin
Conditions | Yield |
---|---|
With hydrogenchloride; N-iodo-succinimide In N,N-dimethyl-formamide Yield given. Further byproducts given; | A 130 mg B 124 mg C n/a D 251 mg |
6-iodo-(+)-catechin
(+)-mollisacacidin
A
(2R,3S,4R)-2,3-trans-3,4-cis-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
B
(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
C
(2R,3S)-2,3-trans-6-<(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxyflavan-4-yl>-3,3',4',5,7-pentahydroxyflavan
D
catechin
Conditions | Yield |
---|---|
With hydrogenchloride; N-iodo-succinimide In N,N-dimethyl-formamide Further byproducts given; | A 130 mg B 124 mg C 5 mg D 251 mg |
catechin
Conditions | Yield |
---|---|
With acetic acid In ethanol for 90h; Heating; Yield given; |
Conditions | Yield |
---|---|
In ethanol for 1h; boiling water bath; |
(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-8-yl>flavan
B
(2R,3S)-2,3-trans-6-<(2R,3S,4R)-2,3-trans-3,4-cis-3,3',4',7-tetrahydroxyflavan-4-yl>-3,3',4',5,7-pentahydroxyflavan
C
(2R,3S)-2,3-trans-6-<(2R,3S,4S)-2,3-trans-3,4-trans-3,3',4',7-tetrahydroxyflavan-4-yl>-3,3',4',5,7-pentahydroxyflavan
D
catechin
Conditions | Yield |
---|---|
With acetic acid; chloroacetic acid In ethanol for 24h; Heating; | A 8 mg B n/a C 8 mg D 53 mg |
C60H48O24
A
proanthocyanidin A-2 4'-benzylthioether
B
4β-benzylthioepicatechin
C
catechin
Conditions | Yield |
---|---|
With acetic acid; phenylmethanethiol In ethanol for 10h; Heating; | A 25 mg B 12 mg C 11 mg |
acetone
catechin
(6aS,12aR)-6a,12a-trans-2,3,8,10-Tetrahydroxy-5,5-dimethyl-5,6a,7,12a-tetrahydro<1>benzopyrano<3,2-c><2>benzopyran
Conditions | Yield |
---|---|
With trimethylsilyl trifluoromethanesulfonate In tetrahydrofuran; acetone at -20℃; Pictet-Spengler Synthesis; | 100% |
With trimethylsilyl trifluoromethanesulfonate In tetrahydrofuran at -5℃; for 12h; | 76.3% |
With boron trifluoride diethyl etherate In acetone at 20℃; for 3h; oxa-Pictet-Spengler reaction; | 71% |
With water; toluene-4-sulfonic acid at 22℃; for 72h; | 24% |
With water; toluene-4-sulfonic acid at 22℃; for 72h; Mechanism; Product distribution; also other flavan-3-ols; other acids, variation of conditions; |
Conditions | Yield |
---|---|
With pyridine In water at 0 - 20℃; | 99% |
With sodium acetate | |
With pyridine |
dimethyl sulfate
catechin
(2R,3S)-(+)-catechin 3',4',5,7-tetramethyl ether
Conditions | Yield |
---|---|
Stage #1: catechin With potassium carbonate In acetone for 1h; Inert atmosphere; Stage #2: dimethyl sulfate In acetone Reflux; Inert atmosphere; | 99% |
Stage #1: catechin With potassium carbonate In acetone for 1h; Inert atmosphere; Stage #2: dimethyl sulfate In acetone Reflux; Inert atmosphere; | 99% |
Stage #1: catechin With potassium carbonate In acetone for 1h; Inert atmosphere; Stage #2: dimethyl sulfate In acetone for 2h; Inert atmosphere; Reflux; | 99% |
Conditions | Yield |
---|---|
With sodium hydride In N,N-dimethyl-formamide at -78 - 20℃; | 98% |
With sodium hydride In N,N-dimethyl-formamide at -78 - 20℃; for 7.25h; | 97% |
With sodium hydride In N,N-dimethyl-formamide; mineral oil at -78 - 20℃; for 7.25h; Inert atmosphere; | 94% |
2-Nitrobenzenesulfonyl chloride
catechin
(2R,3S)-2-(3,4-bis(2-nitrophenylsulfonyloxy)phenyl)-3-hydroxychromane-5,7-diyl bis(2-nitrobenzenesulfonate)
Conditions | Yield |
---|---|
With triethylamine In acetonitrile at -20℃; Inert atmosphere; regioselective reaction; | 94% |
With triethylamine In acetonitrile at -20℃; for 1.5h; Inert atmosphere; | 94% |
benzyl chloride
catechin
(2R,3S)-3,5,7-tris(benzyloxy)-2-(3,4-bis(benzyloxy)phenyl)chroman
Conditions | Yield |
---|---|
With sodium hydride In N,N-dimethyl-formamide; mineral oil at -78 - 20℃; Inert atmosphere; | 91% |
Conditions | Yield |
---|---|
With sodium hydride at -78 - 20℃; | 90% |
Conditions | Yield |
---|---|
With pyridine; dmap at 20℃; for 24h; | 90% |
Conditions | Yield |
---|---|
With α-glucosidase from sulfolobus solfataricus In dimethyl sulfoxide at 45℃; for 2h; pH=9; Enzymatic reaction; | 90% |
Conditions | Yield |
---|---|
With lipozyme TLIM In ethanol at 45℃; for 12h; Enzymatic reaction; | 86.9% |
Indole-3-carboxaldehyde
allyl bromide
catechin
(2R,3S)-2-(3,4-dihydroxy-phenyl)-8-[1-(1H-indol-3-yl)-but-3-enyl]-chroman-3,5,7-triol
Conditions | Yield |
---|---|
With indium In tetrahydrofuran; water at 50℃; for 8h; | 86% |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 0 - 20℃; | 81% |
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 20h; | 74% |
Stage #1: catechin With potassium carbonate In N,N-dimethyl-formamide at 0℃; for 0.25h; Inert atmosphere; Stage #2: benzyl bromide In N,N-dimethyl-formamide at 0 - 25℃; Inert atmosphere; | 68% |
benzyl bromide
benzyl chloride
catechin
(2R,3S)-3,5,7-tris(benzyloxy)-2-(3,4-bis(benzyloxy)phenyl)chroman
Conditions | Yield |
---|---|
Stage #1: benzyl chloride; catechin With potassium carbonate In N,N-dimethyl-formamide at 130℃; for 3h; Stage #2: benzyl bromide With sodium hydride In N,N-dimethyl-formamide at 20℃; for 3h; | 81% |
Conditions | Yield |
---|---|
With pyridine In 1,4-dioxane at 25℃; for 6h; | 80.7% |
Conditions | Yield |
---|---|
With hydrogenchloride In acetonitrile at 20℃; for 6h; | 80.6% |
Conditions | Yield |
---|---|
With pyridine In 1,4-dioxane at 25℃; for 6h; | 79.5% |
Conditions | Yield |
---|---|
With triethylamine In tert-butyl methyl ether at 20℃; for 15h; | 78% |
benzyl bromide
catechin
(2R,3S)-3,5,7-tris(benzyloxy)-2-(3,4-bis(benzyloxy)phenyl)chroman
Conditions | Yield |
---|---|
With sodium hydride In N,N-dimethyl-formamide Reagent/catalyst; | 77% |
Conditions | Yield |
---|---|
With hydrogenchloride In acetonitrile at 20℃; for 6h; | 76.9% |
4-oxopentanoic acid ethyl ester
catechin
(6aS,12aR)-3-(2,3,8,10-tetrahydroxy-5-methyl-5,6a,7,12a-tetrahydro-isochromeno[4,3-b]chromen-5-yl)-propionic acid ethyl ester
Conditions | Yield |
---|---|
With trimethylsilyl trifluoromethanesulfonate In tetrahydrofuran at -5℃; | 76.3% |
catechin
Conditions | Yield |
---|---|
In dichloromethane room temp., under N2, overnight; evapd., residue was applied to a size-exclusion column (Bio-beds S-X1, Bio-rad) using CH2Cl2 as eluent, green portion was collected and recrystd. from CH2Cl2-hexane; elem. anal.; | 75% |
Conditions | Yield |
---|---|
With hydrogenchloride In acetonitrile at 20℃; for 6h; | 73.5% |
Conditions | Yield |
---|---|
With trimethylsilyl trifluoromethanesulfonate In tetrahydrofuran at -5℃; for 12h; | 73.5% |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 15.5h; Inert atmosphere; | 72% |
With potassium carbonate In acetone for 336h; Inert atmosphere; | 59% |
Conditions | Yield |
---|---|
With hydrogenchloride In acetonitrile at 20℃; for 6h; | 71.5% |
Conditions | Yield |
---|---|
With hydrogenchloride In acetonitrile at 20℃; for 6h; | 71.1% |
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