(1R, 2R)-3-(2,4-bis(benzyloxy)-6-(tert-butyldimethylsilyloxy)phenyl)-1-(3',4'-bis(benzyloxy)phenyl)propane-1,2-diol | 918157-98-9

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 直链 1,3-二芳基丙烷
• 英文名称: (1R, 2R)-3-(2,4-bis(benzyloxy)-6-(tert-butyldimethylsilyloxy)phenyl)-1-(3',4'-bis(benzyloxy)phenyl)propane-1,2-diol
• 英文别名: (1R,2R)-3-(2,4-bis(benzyloxy)-6-(tert-butyldimethylsilyloxy)phenyl)-1-(3',4'-bis(benzyloxy)phenyl)propane-1,2-diol；(1R,2R)-3-(2,4-bis(benzyloxy)-6-tert-butyldimethylsilyloxyphenyl)-1-(3',4'-bis(benzyloxy)phenyl)propane-1,2-diol；(1R,2R)-1-[3,4-bis(phenylmethoxy)phenyl]-3-[2-[tert-butyl(dimethyl)silyl]oxy-4,6-bis(phenylmethoxy)phenyl]propane-1,2-diol
• CAS: 918157-98-9
• 化学式: C₄₉H₅₄O₇Si
• 分子量: 783.049
• InChiKey: WEJBULQRVXUHEE-PLIFBFMESA-N

物化性质

• 沸点：
  851.6±65.0 °C(Predicted)
• 密度：
  1.157±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  11.02
• 重原子数：
  57
• 可旋转键数：
  19
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  86.6
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  (1R, 2R)-3-(2,4-bis(benzyloxy)-6-(tert-butyldimethylsilyloxy)phenyl)-1-(3',4'-bis(benzyloxy)phenyl)propane-1,2-diol 在 四丁基氟化铵 、 4-甲基苯磺酸吡啶 、 L-Selectride 、 戴斯-马丁氧化剂 、 原甲酸三乙酯 作用下， 以 四氢呋喃 、 二氯甲烷 、 1,2-二氯乙烷 为溶剂， 反应 11.0h， 生成 tetrabenzyloxy-5,7,3',4'-epicatechin
  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
• 作为产物：
  描述：

  (E)-3-[2,4-bis(benzyloxy)-6-hydroxyphenyl]-1-[3,4-bis(benzyloxy)phenyl]propene 在 咪唑 、 甲基磺酰胺 、 氢化奎尼定 1,4-(2,3-二氮杂萘)二醚 作用下， 以 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 、 叔丁醇 为溶剂， 生成 (1R, 2R)-3-(2,4-bis(benzyloxy)-6-(tert-butyldimethylsilyloxy)phenyl)-1-(3',4'-bis(benzyloxy)phenyl)propane-1,2-diol
  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

• Total Synthesis of Proanthocyanidin A1, A2, and Their Stereoisomers
  作者：Pradeep K. Sharma、Leo J. Romanczyk、Leelakrishna Kondaveti、Bollu Reddy、Jeeva Arumugasamy、Richard Lombardy、Yanni Gou、Hagen Schroeter

  DOI：10.1021/acs.orglett.5b00646

  日期：2015.5.15

  formation, and (c) separation of the diasteromers via silica gel column chromatography. The structures of A1 and A2 proanthocyanidins were unequivocally established by analytical comparison to the natural products. Following this methodology, an additional six diastereomers of proanthocyanidins A1 and A2 have been synthesized. A plausible mechanism for the formation of the A-type linkage in proanthocyanidins

  已经实现了天然存在的A1（1）和A2原花青素（2）的第一个新颖的立体选择性合成。关键的合成步骤涉及（a）在（+）-儿茶素或（-）-表儿茶素的开链C环C-4羟基乙氧基类似物与5,7,3之间形成偶联产物（13或14）在膨润土K-10存在下，'，3'-四-O-苄基-（+）-儿茶素/-（-）-表儿茶素，（b）在温和的催化氢化条件下除去苄基保护基以形成所需的原位A型化合物通过缩酮/氧鎓离子/碳酸根离子形成非对映异构体的混合物，以及（c）通过硅胶柱色谱分离非对映异构体。通过与天然产物的分析比较，明确地确定了A1和A2原花色素的结构。按照这种方法，已经合成了另外六个原花色素A1和A2的非对映异构体。已经提出了在原花青素中形成A型连接的合理机制。
• Preparation of (+)-Catechin, (-)-Epicatechin, (-)-Catechin, and (+)-Epicatechin and Their 5,7,3',4'-Tetra-O-Benzyl Analogues
  申请人：Romanczyk, JR. Leo J.

  公开号：US20100048920A1

  公开（公告）日：2010-02-25

  Processes for preparing racemic mixtures of 5,7,3′,4′-tetra-O-benzyl-(±)-catechin and (±)-epicatechin involves (i) condensing 2-hydroxy-4,6-bis(benzyloxy)-acetophenone and 3,4-bis(benzyloxy)benzaldehyde, cyclizing the resulting compound, oxidizing the resulting compound; (ii) dihydroxylating (E)-3-(3′,4′-bis(benzyloxy)phenyl)prop-2-ene-1-ol and reducing the 1,2-diol; or (iii) coupling 3,5-bis(benzyloxy)phenol with (E)-3,5-bis(benzyloxy)-2-(3′,4′-bis(benzyloxy)phenyl)allyl)phenol and cyclizing the resulting chalcone. A process for preparing the benzylated epimers of catechin and epicatechin involves seven steps. 3,4-Bis(benzyloxy)benzaldehyde is coupled with 2-hydroxy-4,6-benzyloxy-acetophenone to form a chalcone. The chalcone is selectively reduced to an alkene. The phenolic group of the alkene is protected. The protected alkene is asymetrically dihydroxylated. The resulting compound is deprotected, cyclized, and finally hydrolyzed. Epimers resulting from these processes are chemically resolved or separated by chiral high pressure liquid chromatography. Also disclosed is a method for preparing enantiomerically pure 5,7,3′,4′-tetra-O-benzyl-(+)-catechin from a racemic mixture using dibenzoyl-L-tartaric acid monomethyl ester. Further, disclosed is an improved process for preparing dibenzoyl-L-tartaric acid monomethyl ester.

  制备5,7,3′,4′-四-O-苄基-(±)-儿茶素和(±)-表儿茶素的外消旋混合物的过程包括：(i)缩合2-羟基-4,6-双(苄氧基)-乙酮和3,4-双(苄氧基)苯甲醛，环化生成化合物，氧化化合物；(ii)双羟基化(E)-3-(3′,4′-双(苄氧基)苯基)丙-2-烯-1-醇，还原1,2-二醇；或(iii)将3,5-双(苄氧基)苯酚与(E)-3,5-双(苄氧基)-2-(3′,4′-双(苄氧基)苯基)丙烯基)苯酚偶联，生成的查尔酮环化。制备儿茶素和表儿茶素的苄基异构体的过程包括七个步骤。3,4-双(苄氧基)苯甲醛与2-羟基-4,6-双(苄氧基)-乙酮偶联形成查尔酮。查尔酮被选择性还原为烯烃。烯烃的酚基被保护。保护的烯烃被不对称地二羟基化。生成的化合物被去保护，环化，最后水解。这些过程生成的异构体通过手性高压液相色谱进行化学分离。还公开了一种使用二苯乙酰-L-酒石酸单甲酯制备对映纯5,7,3′,4′-四-O-苄基-(+)-儿茶素的方法。此外，还公开了一种改进的制备二苯乙酰-L-酒石酸单甲酯的方法。
• WO2007/2877
  申请人：——

  公开号：——

  公开（公告）日：——