(2R,3S)-5,7,3',4'-tetra-O-benzylflavan-3-yl (3'',4'',5''-tri-O-benzyl)gallate | 732298-13-4

• 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: (2R,3S)-5,7,3',4'-tetra-O-benzylflavan-3-yl (3'',4'',5''-tri-O-benzyl)gallate
• 英文别名: (+)-(2R,3S)-5,7-bis(benzyloxy)-2-[3,4-bis(benzyloxy)phenyl]chroman-3-yl 3,4,5-tris(benzyloxy)benzoate；3′,3″,4′,4″,5,5″,7-per-O-benzyl-(+)-catechin gallate；[(2R,3S)-2-[3,4-bis(phenylmethoxy)phenyl]-5,7-bis(phenylmethoxy)-3,4-dihydro-2H-chromen-3-yl] 3,4,5-tris(phenylmethoxy)benzoate
• CAS: 732298-13-4
• 化学式: C₇₁H₆₀O₁₀
• 分子量: 1073.25
• InChiKey: KWJCLAGWFCETNY-JPFIOEMMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  15.3
• 重原子数：
  81
• 可旋转键数：
  25
• 环数：
  11.0
• sp3杂化的碳原子比例：
  0.14
• 拓扑面积：
  100
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  (2R,3S)-5,7,3',4'-tetra-O-benzylflavan-3-yl (3'',4'',5''-tri-O-benzyl)gallate 在 5%-palladium/activated carbon 、 氢气 作用下， 以 四氢呋喃 为溶剂， 反应 32.0h， 以46%的产率得到(+)-catechin 3-O-gallate
  参考文献：
  名称：

  茶儿茶素降低胆固醇的胶束溶解度的分子机制

  摘要：

  茶多酚通过降低胆固醇的胶束溶解度来降低血液中的胆固醇水平。为阐明该机制，研究了牛磺胆酸与（-）-表没食子儿茶素没食子酸酯（EGCg）及其衍生物之间的相互作用。13 C NMR研究表明，羰基碳原子以及没食子酰基部分中的1''-和4''-位置发生了显着的化学位移变化。此外，使用（-）-EGCg衍生物的1 H NMR研究表明，B环上的羟基数目不影响这些相互作用，而羰基碳原子和没食子酰基部分的芳环则具有显着影响。在儿茶素的2-和3-位上的构型也影响这些相互作用，与反式构型比顺构型产生更强的抑制活性。此外，通过电喷雾电离质谱法测定了儿茶素-牛磺胆酸络合物的1：1组分比。这些分子机制有助于胆固醇吸收抑制剂的发展。

  DOI：

  10.1021/acs.jafc.9b02265
• 作为产物：
  描述：

  3,4-二苄氧基苯甲醛 在 咪唑 、 4-二甲氨基吡啶 、 AD-mix-α 、 甲基磺酰胺 、 硫酸 、 四丁基氟化铵 、 4-甲基苯磺酸吡啶 、 silica gel 、 sodium hydride 、 二异丁基氢化铝 、 原甲酸三乙酯 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 、 水 、 1,2-二氯乙烷 、 N,N-二甲基甲酰胺 、 叔丁醇 为溶剂， 反应 13.0h， 生成 (2R,3S)-5,7,3',4'-tetra-O-benzylflavan-3-yl (3'',4'',5''-tri-O-benzyl)gallate
  参考文献：
  名称：

  Study of the green tea polyphenols catechin-3-gallate (CG) and epicatechin-3-gallate (ECG) as proteasome inhibitors

  摘要：

  The green tea polyphenol catechin-3-gallate (CG) and epicatechin-3-gallate (ECG) were synthesized enantioselectively via a Sharpless hydroxylation reaction followed by a diastereoselective cyclization. Their potencies to inhibit the proteasome activity were measured. The unnatural enantiomers were found to be equally potent to the natural compounds. (C) 2004 Elsevier Ltd, All rights reserved.

  DOI：

  10.1016/j.bmc.2004.04.033

文献信息

• A structure-activity study for the inhibition of metalloproteinase-9 activity and gene expression by analogues of gallocatechin-3-gallate
  作者：M. Dell’Agli、S. Bellosta、L. Rizzi、G. V. Galli、M. Canavesi、F. Rota、R. Parente、E. Bosisio、S. Romeo

  DOI：10.1007/s00018-005-5422-7

  日期：2005.12

  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.
• Systematic synthesis of galloyl-substituted procyanidin B1 and B2, and their ability of DPPH radical scavenging activity and inhibitory activity of DNA polymerases
  作者：Akiko Saito、Yoshiyuki Mizushina、Hiroshi Ikawa、Hiromi Yoshida、Yuki Doi、Akira Tanaka、Noriyuki Nakajima

  DOI：10.1016/j.bmc.2005.02.023

  日期：2005.4

  Six galloyl-substituted procyanidin B1 and B2, 3-O-gallate, 3"-O-gallate, and 3,3"-di-O-gallate, were systematically synthesized with the condensation method using TMSOTf as a catalyst. Their ability of DPPH radical scavenging activity and DNA polymerase inhibitory activity were also investigated. The results indicated that the galloyl group of these compounds is very important for both activities. 3,3"-Di-O-gallate dimers acted as strong inhibitor against DNA polymerase alpha and beta, whereas the desgalloyl and monogalloyl compounds did not exhibit any appreciable inhibitory activity against the DNA polymerase beta. (c) 2005 Elsevier Ltd. All rights reserved.
• Stereoselective synthesis of procyanidin B3-3-O-gallate and 3,3″-di-O-gallate, and their abilities as antioxidant and DNA polymerase inhibitor
  作者：Akiko Saito、Mana Emoto、Akira Tanaka、Yuki Doi、Kazuaki Shoji、Yoshiyuki Mizushina、Hiroshi Ikawa、Hiromi Yoshida、Nobuyasu Matsuura、Noriyuki Nakajima

  DOI：10.1016/j.tet.2004.10.048

  日期：2004.12

  A simple method for the synthesis of procyanidin B3 substituted with a galloyl group at the 3 and 3" position is described. Condensation of a benzylated catechin-3-O-gallate electrophile with a nucleophile, catechin and catechin-3-O-gallate, proceeded smoothly and stereoselectively to afford the corresponding dimer gallates, procyanidin B3-3-O-gallate and procyanidin B3-3,3"-di-O-gallate, in good yields. Further, their antioxidant activities on UV-induced lipid peroxide formation, DPPH radical scavenging activity and inhibitory activity of DNA polymerase were also investigated. Among three procyanidin B3 congeners (procyanidin B3, 3-O-gallate and 3,3"-di-O-gallate), the 3,3"-di-O-gallate derivative showed the strongest antioxidant and radical scavenging activity. Interestingly, the 3-O-gallate derivative was the strongest inhibitor of mammalian DNA polymerase a with IC50 value of 0.26 muM, although it showed the weakest antioxidant and radical scavenging activity. It became apparent that the presence of a galloyl group at the C-3 position in the proanthocyanidin oligomer was very important for biological activity, however, the antioxidant activity of these compounds was not parallel to the DNA polymerase inhibitory activity. (C) 2004 Elsevier Ltd. All rights reserved.
• Molecular Mechanism by Which Tea Catechins Decrease the Micellar Solubility of Cholesterol
  作者：Takumi Sakakibara、Yoshiharu Sawada、Jilite Wang、Satoshi Nagaoka、Emiko Yanase

  DOI：10.1021/acs.jafc.9b02265

  日期：2019.6.26

  (EGCg) and its derivatives were investigated. 13C NMR studies revealed remarkable chemical-shift changes for the carbonyl carbon atom and the 1″- and 4″-positions in the galloyl moiety. Furthermore, 1H NMR studies using (−)-EGCg derivatives showed that the number of hydroxyl groups on the B ring did not affect these interactions, whereas the carbonyl carbon atom and the aromatic ring of the galloyl moiety

  茶多酚通过降低胆固醇的胶束溶解度来降低血液中的胆固醇水平。为阐明该机制，研究了牛磺胆酸与（-）-表没食子儿茶素没食子酸酯（EGCg）及其衍生物之间的相互作用。13 C NMR研究表明，羰基碳原子以及没食子酰基部分中的1''-和4''-位置发生了显着的化学位移变化。此外，使用（-）-EGCg衍生物的1 H NMR研究表明，B环上的羟基数目不影响这些相互作用，而羰基碳原子和没食子酰基部分的芳环则具有显着影响。在儿茶素的2-和3-位上的构型也影响这些相互作用，与反式构型比顺构型产生更强的抑制活性。此外，通过电喷雾电离质谱法测定了儿茶素-牛磺胆酸络合物的1：1组分比。这些分子机制有助于胆固醇吸收抑制剂的发展。
• Study of the green tea polyphenols catechin-3-gallate (CG) and epicatechin-3-gallate (ECG) as proteasome inhibitors
  作者：Sheng Biao Wan、Di Chen、Q. Ping Dou、Tak Hang Chan

  DOI：10.1016/j.bmc.2004.04.033

  日期：2004.7

  The green tea polyphenol catechin-3-gallate (CG) and epicatechin-3-gallate (ECG) were synthesized enantioselectively via a Sharpless hydroxylation reaction followed by a diastereoselective cyclization. Their potencies to inhibit the proteasome activity were measured. The unnatural enantiomers were found to be equally potent to the natural compounds. (C) 2004 Elsevier Ltd, All rights reserved.