Afzelechin gallate | 108907-43-3

• 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: Afzelechin gallate
• 英文别名: (+)-afzelichin gallate；[(2R,3S)-5,7-dihydroxy-2-(4-hydroxyphenyl)-3,4-dihydro-2H-chromen-3-yl] 3,4,5-trihydroxybenzoate
• CAS: 108907-43-3
• 化学式: C₂₂H₁₈O₉
• 分子量: 426.38
• InChiKey: SDZPYNMXGUHFMZ-PZJWPPBQSA-N

物化性质

• 熔点：
  242-244 °C (decomp)
• 沸点：
  822.1±65.0 °C(Predicted)
• 密度：
  1.72±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  31
• 可旋转键数：
  4
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.14
• 拓扑面积：
  157
• 氢给体数：
  6
• 氢受体数：
  9

反应信息

• 作为产物：
  描述：

  E-3-(4-苄氧基)-1-(2.4-二苄氧基-6-羟基)苯基)丙烯酮 在 palladium on activated charcoal N-甲基吗啉 、 4-二甲氨基吡啶 、 sodium tetrahydroborate 、 硼烷四氢呋喃络合物 、 氢气 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 作用下， 以 四氢呋喃 、 甲醇 、 乙醇 、 N,N-二甲基甲酰胺 为溶剂， 生成 Afzelechin gallate
  参考文献：
  名称：

  A structure-activity study for the inhibition of metalloproteinase-9 activity and gene expression by analogues of gallocatechin-3-gallate

  摘要：

  Catechins are able to modulate the gelatinolytic activity of matrix metalloproteinase-9 (MMP-9) by reducing its release from macrophages. Gallocatechins decrease MMP-9 secretion by lowering MMP-9 promoter activity and mRNA levels. The effect appears to be dependent on some structural and stereochemical requirements. In this study, the relationship between chemical structure and activity was studied by testing the effect of analogues of (+/-)-gallocatechin-3-gallate (+/-)-GCG, selectively deprived of hydroxyl groups, on MMP-9 activity, transcription, and secretion. Our results indicate that (+/-)-GCG and (+/-)-catechin-3-gallate are characterized by a substitution pattern compatible with direct inhibition of MMP-9 activity. Conversely, when transcription was the target, (+/-)-trans-3-flavanol-3-benzoate, lacking all the hydroxyl groups, was the most effective both in lowering MMP-9 promoter activity and consequently protein secretion, and in inhibiting nuclear-factor-kappa B-driven transcription. Our results suggest that the structural requirements for enzyme inhibition are different from those necessary for targeting gene expression.

  DOI：

  10.1007/s00018-005-5422-7

文献信息

• (-)-Epigallocatechin Gallate Derivatives For Inhibiting Proteasome
  申请人：Chan Tak-Hang

  公开号：US20080176931A1

  公开（公告）日：2008-07-24

  (−)-EGCG, the most abundant catechin, was found to be chemopreventive and anticancer agent. However, (−)-EGCG has at least one limitation: it gives poor bioavailability. This invention provides compounds of generally formulae below, wherein R 11 , R 12 , R 13 , R 21 , R 22 , R 2 , R 3 , and R 4 are each independently selected from the group consisting of —H, and C 1 to C 10 acyloxyl group; and R 5 is selected from the group consisting of —H, C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, C 2 -C 10 -alkynyl, C 3 -C 7 -cycloalkyl, phenyl, benzyl and C 3 -C 7 -cycloalkenyl, whereas each of the last mentioned 7 groups can be substituted with any combination of one to six halogen atoms; at least one of R 11 , R 12 , R 13 , R 21 , R 22 , R 2 , R 3 and R 4 is —H, which were found to be more potent than their non-protected counterparts, which can be used as proteasome inhibitors to reduce tumor cell growth.

  (-)-EGCG是最丰富的儿茶素之一，被发现具有化学预防和抗癌作用。然而，(-)-EGCG至少存在一个限制：其生物利用度较低。本发明提供了一般化学式如下的化合物，其中R11、R12、R13、R21、R22、R2、R3和R4各自独立地选择自-H和C1到C10酰氧基的群组成；而R5选择自-H、C1-C10烷基、C2-C10烯基、C2-C10炔基、C3-C7环烷基、苯基、苄基和C3-C7环烯基，而最后提到的7个基团中的每一个都可以用任意组合的1到6个卤素原子取代；其中至少有一个是R11、R12、R13、R21、R22、R2、R3和R4中的-H，这些化合物比其非保护的对应物更有效，可用作蛋白酶体抑制剂来减少肿瘤细胞生长。
• (-)-Epigallocatechin Gallate Derivatives for Inhibiting Proteasome
  申请人：CHAN Tak-Hang

  公开号：US20120232135A1

  公开（公告）日：2012-09-13

  A method of reducing tumor cell growth, the method including administering an effective amount of a compound having the formula:

  一种减少肿瘤细胞生长的方法，包括给予一种具有以下化学式的化合物的有效剂量：
• (-)-EPIGALLOCATECHIN GALLATE DERIVATIVES FOR INHIBITING PROTEASOME
  申请人：The Hong Kong Polytechnic University

  公开号：US20160068503A1

  公开（公告）日：2016-03-10

  A method of reducing tumor cell growth, the method including administering an effective amount of a compound having the formula:

  一种减少肿瘤细胞生长的方法，该方法包括给予一种具有以下公式的化合物的有效量：
• Enantioselective synthesis of afzelechin and epiafzelechin
  作者：Sheng Biao Wan、Tak Hang Chan

  DOI：10.1016/j.tet.2004.06.113

  日期：2004.9

  The flavonoids afzelechin and epiafzelechin as well as their gallate esters were synthesized enantioselectively via Sharpless hydroxylation followed by regioselective cyclization. (C) 2004 Elsevier Ltd. All rights reserved.
• Proanthocyanidins of Rhodiola semenovii
  作者：Kim Khvan Khi、Z. A. Kuliev、A. D. Vdovin、M. R. Yagudaev、V. M. Malikov

  DOI：10.1007/bf00629925

  日期：1991.11