(-)-epicatechin (4β-8)-(-)-epigallocatechin 3-O-gallate | 126715-89-7

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 黄酮类化合物
• 英文名称: (-)-epicatechin (4β-8)-(-)-epigallocatechin 3-O-gallate
• 英文别名: (-)-epicatechin-(4β-8)-(-)-epigallocatechin-3-O-gallate；(-)-epicatechin-(4β-8)-3-O-galloyl-(-)-epigallocatechin；epicatechin-(4β->8)-epigallocatechin 3-O-gallate；(-)-epicatechin(4β-8) (-)-epigallocatechin 3-O-gallate；(-)-epicatechin-(4β-8)-epigallocatechingallate；(-)-epicatechin-(4β-8)-(-)-epigallocatechin 3-O-gallate；Epicatechin-(4beta->8)-epigallocatechin 3'-gallate；[(2R,3R)-8-[(2R,3R,4R)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-4-yl]-5,7-dihydroxy-2-(3,4,5-trihydroxyphenyl)-3,4-dihydro-2H-chromen-3-yl] 3,4,5-trihydroxybenzoate
• CAS: 126715-89-7
• 化学式: C₃₇H₃₀O₁₇
• 分子量: 746.635
• InChiKey: BUOLDWJIICQRBU-RGOYVLDUSA-N

物化性质

• 沸点：
  1086.1±65.0 °C(Predicted)
• 密度：
  1.97±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  54
• 可旋转键数：
  6
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.16
• 拓扑面积：
  308
• 氢给体数：
  13
• 氢受体数：
  17

反应信息

• 作为反应物：
  描述：

  (-)-epicatechin (4β-8)-(-)-epigallocatechin 3-O-gallate 在 水 作用下， 反应 0.17h， 以10 mg的产率得到epicatechin(4β->8)epigallocatechin
  参考文献：
  名称：

  Tannins and related compounds. XC. 8-C-ascorbyl (-)-epigallocatechin 3-O-gallate and novel dimeric flavan-3-ols, oolonghomobisflavans A and B, from oolong tea.(3).

  摘要：

  对商业乌龙茶中的多酚成分进行化学检查，导致了一种新的黄烷-3-醇的分离，两个新型的二聚黄烷-3-醇被命名为乌龙双黄烷 A 和 B，以及八种新的原花青素，并与二十一种已知的多酚类物质包括原花青素、水解单宁和红色素一同发现。根据化学和光谱证据，该黄烷-3-醇被表征为8-C-抗坏血酸 (-)-表没食子酸-3-O-没食子酸酯（22），而乌龙双黄烷 A（26）和 B（27）被确定为二聚黄烷-3-醇，其中两个单元通过甲撑桥分别在8, 8'-和8, 6'-位连接。新的原花青素的结构主要通过单宁酶水解和硫解降解阐明，分别为表没食子酸-(4β→8)-表没食子酸-3-O-没食子酸酯（29）、表没食子酸-3-O-没食子酸酯-(4β→8)-表没食子酸-3-O-没食子酸酯（30）、儿茶素-(4α→8)-表没食子酸-3-O-没食子酸酯（31）、前南梅素 B-4 3'-O-没食子酸酯（32）、表没食子酸-3-O-没食子酸酯-(4β→6)-表没食子酸-3-O-没食子酸酯（33）、表没食子酸-3-O-没食子酸酯-(4β→6)-表没食子酸-3-O-没食子酸酯（34）、表阿伏塞黑素-3-O-没食子酸酯-(4β→6)-表没食子酸-3-O-没食子酸酯（35）和前南梅素 B-2 3'-O-没食子酸酯（36）。

  DOI：

  10.1248/cpb.37.3255

文献信息

• METHOD OF PRODUCING PROANTHOCYANIDIN OLIGOMER
  申请人：Tanaka Takashi

  公开号：US20090047305A1

  公开（公告）日：2009-02-19

  The present invention relates to a composition containing as its main component proanthocyanidin oligomer to which a substance having a phloroglucinol ring structure or resorcinol ring structure has been bonded, and reduced in the molecular weight, which is obtained by heating plant materials containing proanthocyanidin polymer or extract thereof with a substance having a phloroglucinol ring structure or resorcinol ring structure in an acidic aqueous solution, production method thereof, and uses of the composition in health products and pharmaceutical products. According to the invention, proanthocyanidin oligomer having physiological activity, to which a substance having a phloroglucinol ring structure or resorcinol ring structure has been bonded and reduced in the molecular weight to such a level that the oligomer can be absorbed into living body, which has been conventionally difficult to obtain at high yield from plant raw materials, can be produced efficiently and easily.

  本发明涉及一种组合物，其主要成分为与具有邻苯二酚环结构或间苯二酚环结构的物质键合并分子量降低的原花青素寡聚体，该组合物通过在酸性水溶液中将含有原花青素聚合物或其提取物的植物材料与具有邻苯二酚环结构或间苯二酚环结构的物质加热而得到，以及该组合物在健康产品和药品中的用途和其制备方法。根据本发明，具有生理活性的原花青素寡聚体，其分子量已经被降低到能够被生物体吸收的水平，并且与具有邻苯二酚环结构或间苯二酚环结构的物质键合，这在以往从植物原材料中高产得到是困难的，现在可以高效、容易地生产。
• Tannins and related compounds. XC. 8-C-ascorbyl (-)-epigallocatechin 3-O-gallate and novel dimeric flavan-3-ols, oolonghomobisflavans A and B, from oolong tea.(3).
  作者：Fumio HASHIMOTO、Gen-ichiro NONAKA、Itsuo NISHIOKA

  DOI：10.1248/cpb.37.3255

  日期：——

  A chemical examination of the polypenolic constituents in commercial oolong tea has led to the isolation of a new-flavan-3-ol, two novel dimeric flavan-3-ols named oolonghomobisflavans A and B eight new proanthocyanidins, together with twenty-one known polyphenols including proanthocyanidins, hydrolyzable tannins and red pigments. On the basis of chemical and spectroscopic evidence, the flavan-3-ol has been characterized as 8-C-ascorbyl (-)-epigallocatechin 3-O-gallate (22), while oolonghomobisflavans A (26) and B (27) have been determined to be dimeric flavan-3-ols in which two units are linked through a methylene bridge at the 8, 8'- and 8, 6'-positions, respectively. The structures of the new proanthocyanidins were elucidated mainly by tannase hydrolysis and thiolytic degradtion as epicatechin-(4β→8)-epigallocatechin 3-O-gallate (29), epicatechin 3-O-gallate-(4β→8)-epigallocatechin 3-O-gallate (30), catechin-(4α→8)-epigallocatechin 3-O-gallate (31), prodelphinidin B-4 3'-O-gallate (32), epicatechin 3-O-gallate-(4β→6)-epigallocatechin 3-O-gallate (33), epigallocatechin 3-O-gallate-(4β→6)-epicatechin 3-O-gallate (34), epiafzelechin 3-O-gallate-(4β→6)-epigallocatechin 3-O-gallate (35) and prodelphinidin B-2 3'-O-gallate (36).

  对商业乌龙茶中的多酚成分进行化学检查，导致了一种新的黄烷-3-醇的分离，两个新型的二聚黄烷-3-醇被命名为乌龙双黄烷 A 和 B，以及八种新的原花青素，并与二十一种已知的多酚类物质包括原花青素、水解单宁和红色素一同发现。根据化学和光谱证据，该黄烷-3-醇被表征为8-C-抗坏血酸 (-)-表没食子酸-3-O-没食子酸酯（22），而乌龙双黄烷 A（26）和 B（27）被确定为二聚黄烷-3-醇，其中两个单元通过甲撑桥分别在8, 8'-和8, 6'-位连接。新的原花青素的结构主要通过单宁酶水解和硫解降解阐明，分别为表没食子酸-(4β→8)-表没食子酸-3-O-没食子酸酯（29）、表没食子酸-3-O-没食子酸酯-(4β→8)-表没食子酸-3-O-没食子酸酯（30）、儿茶素-(4α→8)-表没食子酸-3-O-没食子酸酯（31）、前南梅素 B-4 3'-O-没食子酸酯（32）、表没食子酸-3-O-没食子酸酯-(4β→6)-表没食子酸-3-O-没食子酸酯（33）、表没食子酸-3-O-没食子酸酯-(4β→6)-表没食子酸-3-O-没食子酸酯（34）、表阿伏塞黑素-3-O-没食子酸酯-(4β→6)-表没食子酸-3-O-没食子酸酯（35）和前南梅素 B-2 3'-O-没食子酸酯（36）。