CAS: 20315-25-7; (2R,2'R,3R,3'S,4R)-2,2'-Bis(3,4-Dihydroxyphenyl)-[4,8'-Bichromane]-3,3',5,5',7,7'-Hexaol

上下游产品

CAS号664351-43-3 pr°Cyanidin B1 ... | CAS号154-23-4 儿茶精； 儿茶素； (2R,3... | CAS号20728-73-8 5,7,3',4'-四-O-苄基儿茶素 | CAS号87292-49-7 tetrabeuzyl-(-)... | CAS号490-46-0 表儿茶素(EC) | CAS号664351-42-2 [4,8]-2,3-cis-3... | CAS号490-46-0 表儿茶素(EC) | CAS号154-23-4 儿茶精； 儿茶素； (2R,3... | CAS号128837-34-3 4α-Benzylthioep... | CAS号13306-05-3 花青素

儿茶提取物置于palladium Dihydroxide 氢气,四氯化钛,碳酸氢钠,Potassium Carbonate,三乙胺体系中,用 四氢呋喃,甲醇,二氯甲烷,水,乙酸乙酯,N,N-二甲基甲酰胺 用作溶剂,化学反应 21.0H,反应生成原花青素(Opc)
参考文献:原花青素二聚体的改进合成:间黄烷键的区域和立体控制
标题:原花青素二聚体的改进合成:间黄烷键的区域和立体控制
摘要:介绍了原花青素二聚体 B1,B2,B3 和 B4 (10A-D) 的直接和一般合成.该方法基于两个受保护单体单元(亲核 2A-B 和亲电 4A-B 伙伴)的化学计量偶联,并处理 C4-C8 间黄烷键的区域和立体控制以及控制程度低聚.合成涉及从天然儿茶素 (1A) 或表儿茶素 (1B) 开始到完全脱保护的二聚体 10A-D 的五步途径.此外,该过程似乎是迭代的,因为偶联中间体 9A-D 本身可以很容易地用于三聚体或更高级低聚物的进一步选择性合成.(© Wiley-Vch Verlag Gmbh & Co. Kgaa,69451 Weinheim,Germany,2006)
Doi:10.1002/ejoc.200600668

专利信息

专利号:EP-1921076-A1
优先权日:2002-10-11
标题:systhesis of procyanidin B2
发明人：CASTILLO GERARDO M; NGUYEN BETH P; CHOI PAULA Y; LARSEN LESLEY; LORIMER STEPHEN D; SNOW ALAN D
权利人:PROTEOTECH INC
摘要:Methods for the synthesis of procyanidin B2 are disclosed. The synthetic methods utilize epicatechin as a starting material and produce procyanidin BZ in high yields.

专利号:US-2025281637-A1
优先权日:2021-05-17
标 题 :Au, ag and rich phytochemical payload nanomaterials, antiviral/antibacterial products and synthesis methods
发明人：KATTI KATTESH V; KATTI KAVITA K
权利人:UNIV MISSOURI
摘要:A nanomaterial is gold or silver nanoparticle having a nanoparticle surface that consists of one or more of the following extracts from sweet gum leaves: shikimic acid, sweet gum leaf family of Catechins, sweet gum leaf family of Quercetin Sweroside, Afzelechin, p-Coumaric Acid, Epiafzelechin Trimethyl Ether, Myricetin, Naringenin, Phloretin, Procyanidin B1 and related polyphenols, flavonoids and alkaloids. An antiviral/antibacterial agent includes sweet gum mediated silver nanoparticles having a core size and in a concentration having efficacy as an antiviral/antibacterial exceeding a 3 log 10 reduction in viral titer.

专利号:CA-2499549-C
优先权日:2002-10-11
标题:Isolation, purification and synthesis of procyanidin b2 and uses thereof

专利号:US-2008306142-A1
优先权日:2002-02-15
标题 :Isolation, purification and synthesis of procyanidin B2 and uses thereof

专利号:US-2008306286-A1
优先权日:2002-10-11
标题 :Isolation, Purification and Synthesis of Procyanidin B2 and Uses Thereof

专利号:JP-2004508362-A
优先权日:2000-09-05
标 题 :Synthesis of 4α-aryl epicatechin