(-)-epiafzelechin 4β-benzylthioether | 114653-49-5

• 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: (-)-epiafzelechin 4β-benzylthioether
• 英文别名: epiafzelechin-(4β-8)-benzylthioether；(-)-4β-benzylthioepiafzelechin；(-)-epiafzelechin 4-benzylthioether；(2R,3S,4S)-4-benzylsulfanyl-2-(4-hydroxyphenyl)-3,4-dihydro-2H-chromene-3,5,7-triol
• CAS: 114653-49-5
• 化学式: C₂₂H₂₀O₅S
• 分子量: 396.464
• InChiKey: FWCMTVSSPCQCKY-BDTNDASRSA-N

物化性质

• 沸点：
  671.4±55.0 °C(predicted)
• 密度：
  1.49±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  28
• 可旋转键数：
  4
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  115
• 氢给体数：
  4
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  (-)-epiafzelechin 4β-benzylthioether 在 Raney-nickel (W-4) 作用下， 以 乙醇 、 溶剂黄146 为溶剂， 反应 0.5h， 以5 mg的产率得到(-)-表阿夫儿茶精
  参考文献：
  名称：

  Morimoto, Satoshi; Nonaka, Gen-Ichiro; Chen, Rong-Fu, Chemical and pharmaceutical bulletin, 1988, vol. 36, # 1, p. 39 - 47

  摘要：

  DOI：
• 作为产物：
  描述：

  (2R,3S,4S)-4-benzylsulfanyl-2-(4-hydroxyphenyl)-8-[(2R,3R,4R)-3,5,7-trihydroxy-2-(4-hydroxyphenyl)-3,4-dihydro-2H-chromen-4-yl]-3,4-dihydro-2H-chromene-3,5,7-triol 在 镍 、 溶剂黄146 作用下， 以 乙醇 为溶剂， 反应 10.5h， 生成 (-)-epiafzelechin 4β-benzylthioether
  参考文献：
  名称：

  Morimoto, Satoshi; Nonaka, Gen-Ichiro; Chen, Rong-Fu, Chemical and pharmaceutical bulletin, 1988, vol. 36, # 1, p. 39 - 47

  摘要：

  DOI：

文献信息

• 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）。
• Tannins and related compounds. XCI. Isolation and characterization of proanthocyanidins with an intramolecularly doubly-linked unit from the fern, Dicranopteris pedata Houtt.
  作者：Yoshiki KASHIWADA、Masafumi MORITA、Gen-ichiro NONAKA、Itsuo NISHIOKA

  DOI：10.1248/cpb.38.856

  日期：——

  A chemical examination of the polyphenolic constituents of the fern, Dicranopteris pedata HOUTT., has led to the isolation of eight new proanthocyanidins possessing a doubly-linked (A-type) unit, together with known flavan-3-ols and proanthocyanidins. On the basis of chemical and spectroscopic evidence, they are characterized as epiafzelechin-(4β→8, 2β→O→7)-eniafzelechin-(4α→8)-epiafzelechin(8), epicatechin-(4β→8, 2β→O→7)-epiafzelechin-(4α→8)-epiafzelechin(9), epiafzelechin-(4β→8, 2β→O→7)-epizfzelechin-(4α→8)-epicatechin(10), epiafzelechin-(4β→8, 2β→O→7)-epicatechin-(4α→8)-epicatechin (11), epicatechin-(4β→8, 2β→O→7)-epiafzelechin-(4α→8)-epicatechin (12), epicatechin-(4β→8, 2β→O→7)-epicatechin-(4α→8)-epiafzelechin (13), epicatechin-(4β→8, 2β→O→7)-epicatechin-(4α→8)-epigallocatechin (14) and epiafzelechin-(4β→8)epicatechin-(4β→8, 2β→O→β→7)-epicatechin-(4α→8)-epicatechin (15).

  通过对蕨类植物 Dicranopteris pedata HOUTT.的多酚类成分进行化学研究，分离出了 8 种新的原花青素，它们与已知的黄烷-3-醇和原花青素都具有双链（A 型）单元。根据化学和光谱证据，它们的特征是表儿茶素-(4β→8, 2β→O→7)-epeniafzelechin-(4α→8)-epiafzelechin(8), 表儿茶素-(4β→8、2β→O→7)-epiafzelechin-(4α→8)-epiafzelechin(9), epiafzelechin-(4β→8, 2β→O→7)-epizfzelechin-(4α→8)-epicatechin(10), epiafzelechin-(4β→8, 2β→O→7)-epicatechin-(4α→8)-epicatechin (11)、表儿茶素-(4β→8, 2β→O→7)-epiafzelechin-(4α→8)-epicatechin (12)、表儿茶素-(4β→8, 2β→O→7)-epicatechin-(4α→8)-epiafzelechin (13)、表儿茶素-(4β→8、2β→O→7)-epicatechin-(4α→8)-epigallocatechin (14) 和 epiafzelechin-(4β→8)epicatechin-(4β→8, 2β→O→β→7)-epicatechin-(4α→8)-epicatechin (15)。
• KASHIWADA, YOSHIKI;MORITA, MASAFUMI;NONAKA, GEN-ICHIRO;NISHIOKA, ITSUO, CHEM. AND PHARM. BULL., 38,(1990) N, C. 856-860
  作者：KASHIWADA, YOSHIKI、MORITA, MASAFUMI、NONAKA, GEN-ICHIRO、NISHIOKA, ITSUO

  DOI：——

  日期：——
• KASHIWADA, YOSHIKI;IIZUKA, HIROYUKI;YOSHIOKA, KEIKO;CHEN, RONG-FU;NONAKA,+, CHEM. AND PHARM. BULL., 38,(1990) N, C. 888-893
  作者：KASHIWADA, YOSHIKI、IIZUKA, HIROYUKI、YOSHIOKA, KEIKO、CHEN, RONG-FU、NONAKA,+

  DOI：——

  日期：——
• MORIMOTO, SATOSHI;NONAKA, GEN-ICHIRO;CHEN, RONG-FU;NISHIOKA, ITSUO, CHEM. AND PHARM. BULL., 36,(1988) N 1, 39-47
  作者：MORIMOTO, SATOSHI、NONAKA, GEN-ICHIRO、CHEN, RONG-FU、NISHIOKA, ITSUO

  DOI：——

  日期：——