(2R,3S,4S)-3-acetoxy-4-(2-ethoxyethoxy)-5,7,3',4',5'-pentabenzyloxyflavan | 1429125-63-2

• 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,4S)-3-acetoxy-4-(2-ethoxyethoxy)-5,7,3',4',5'-pentabenzyloxyflavan
• 英文别名: [(2R,3S,4S)-4-(2-ethoxyethoxy)-5,7-bis(phenylmethoxy)-2-[3,4,5-tris(phenylmethoxy)phenyl]-3,4-dihydro-2H-chromen-3-yl] acetate
• CAS: 1429125-63-2
• 化学式: C₅₆H₅₄O₁₀
• 分子量: 887.039
• InChiKey: WZHZMTYPJANANS-FNEPHLAQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10.4
• 重原子数：
  66
• 可旋转键数：
  23
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.23
• 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)-2-[3,4-bis(phenylmethoxy)phenyl]-8-[(2R,3S,4S)-3-hydroxy-5,7-bis(phenylmethoxy)-2-[3,4,5-tris(phenylmethoxy)phenyl]-3,4-dihydro-2H-chromen-4-yl]-5,7-bis(phenylmethoxy)-3,4-dihydro-2H-chromen-3-ol 、 (2R,3S,4S)-3-acetoxy-4-(2-ethoxyethoxy)-5,7,3',4',5'-pentabenzyloxyflavan 在 silver tetrafluoroborate 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 以63%的产率得到[(2R,3S,4S)-4-[(2R,3S,4R)-4-[(2R,3S)-2-[3,4-bis(phenylmethoxy)phenyl]-3-hydroxy-5,7-bis(phenylmethoxy)-3,4-dihydro-2H-chromen-8-yl]-3-hydroxy-5,7-bis(phenylmethoxy)-2-[3,4,5-tris(phenylmethoxy)phenyl]-3,4-dihydro-2H-chromen-8-yl]-5,7-bis(phenylmethoxy)-2-[3,4,5-tris(phenylmethoxy)phenyl]-3,4-dihydro-2H-chromen-3-yl] acetate
  参考文献：
  名称：

  Syntheses of prodelphinidin B3 and C2, and their antitumor activities through cell cycle arrest and caspase-3 activation

  摘要：

  Total synthesis of prodelphinidin B3 and C2 have been accomplished. The key step is Lewis acid-mediated equimolar condensations between a catechin and/or gallocatechin nucleophile and a gallocatechin electrophile. The antitumor effects of synthetic prodelphidin B3 and C2 against PC-3 prostate cancer cell lines have been investigated. Both compounds showed significant antitumor effects. Their activity was almost the same as that of EGCG, a known antitumor agent. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.02.087
• 作为产物：
  描述：

  、 乙酸酐 在 吡啶 、 4-二甲氨基吡啶 作用下， 以70 mg的产率得到(2R,3S,4S)-3-acetoxy-4-(2-ethoxyethoxy)-5,7,3',4',5'-pentabenzyloxyflavan
  参考文献：
  名称：

  Syntheses of prodelphinidin B3 and C2, and their antitumor activities through cell cycle arrest and caspase-3 activation

  摘要：

  Total synthesis of prodelphinidin B3 and C2 have been accomplished. The key step is Lewis acid-mediated equimolar condensations between a catechin and/or gallocatechin nucleophile and a gallocatechin electrophile. The antitumor effects of synthetic prodelphidin B3 and C2 against PC-3 prostate cancer cell lines have been investigated. Both compounds showed significant antitumor effects. Their activity was almost the same as that of EGCG, a known antitumor agent. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.02.087

文献信息

• Structure–Activity Relationship of Oligomeric Flavan-3-ols: Importance of the Upper-Unit B-ring Hydroxyl Groups in the Dimeric Structure for Strong Activities
  作者：Yoshitomo Hamada、Syota Takano、Yoshihiro Ayano、Masahiro Tokunaga、Takahiro Koashi、Syuhei Okamoto、Syoma Doi、Masahiko Ishida、Takashi Kawasaki、Masahiro Hamada、Noriyuki Nakajima、Akiko Saito

  DOI：10.3390/molecules201018870

  日期：——

  Proanthocyanidins, which are composed of oligomeric flavan-3-ol units, are contained in various foodstuffs (e.g., fruits, vegetables, and drinks) and are strongly biologically active compounds. We investigated which element of the proanthocyanidin structure is primarily responsible for this functionality. In this study, we elucidate the importance of the upper-unit of 4–8 condensed dimeric flavan-3-ols for antimicrobial activity against Saccharomyces cerevisiae (S. cerevisiae) and cervical epithelioid carcinoma cell line HeLa S3 proliferation inhibitory activity. To clarify the important constituent unit of proanthocyanidin, we synthesized four dimeric compounds, (−)-epigallocatechin-[4,8]-(+)-catechin, (−)-epigallocatechin-[4,8]-(−)-epigallocatechin, (−)-epigallocatechin-[4,8]-(−)-epigallocatechin-3-O-gallate, and (+)-catechin-[4,8]-(−)-epigallocatechin and performed structure–activity relationship (SAR) studies. In addition to antimicrobial activity against S. cerevisiae and proliferation inhibitory activity on HeLa S3 cells, the correlation of 2,2-diphenyl-l-picrylhydrazyl radical scavenging activity with the number of phenolic hydroxyl groups was low. On the basis of the results of our SAR studies, we concluded that B-ring hydroxyl groups of the upper-unit of the dimer are crucially important for strong and effective activity.

  原花青素是由低聚黄烷-3-醇单位组成的，存在于各种食品（如水果、蔬菜和饮料）中，是一种具有很强生物活性的化合物。我们研究了原花青素结构中哪种元素主要负责这种功能。在这项研究中，我们阐明了 4-8 缩合二聚体黄烷-3-醇上部单元对酿酒酵母（S. cerevisiae）和宫颈上皮样癌细胞株 HeLa S3 增殖抑制活性的重要性。(-)-表没食子儿茶素-[4,8]-(-)-表没食子儿茶素-3-O-没食子酸酯，以及(+)-儿茶素-[4,8]-(-)-表没食子儿茶素，并进行了结构-活性关系（SAR）研究。 除了对葡萄孢菌的抗菌活性和对 HeLa S3 细胞的增殖抑制活性外，2,2-二苯基-l-苦基肼自由基清除活性与酚羟基数目的相关性较低。根据我们的 SAR 研究结果，我们得出结论：二聚体上部单元的 B 环羟基对于强有效的活性至关重要。
• Syntheses of prodelphinidin B1, B2, and B4 and their antitumor activities against human PC-3 prostate cancer cell lines
  作者：Wataru Fujii、Kazuya Toda、Kiriko Matsumoto、Koichiro Kawaguchi、Sei-ichi Kawahara、Yasunao Hattori、Hiroshi Fujii、Hidefumi Makabe

  DOI：10.1016/j.tetlet.2013.10.113

  日期：2013.12

  Total synthesis of prodelphinidin B1, B2, and B4 has been accomplished. The key step is Lewis acid-mediated equimolar condensations between an epigallocatechin and/or a gallocatechin nucleophile and an epigallocatechin and/or a gallocatechin electrophile. The antitumor effects of synthetic prodelphinidin B1-B4 against human PC-3 prostate cancer cell lines have been investigated. These compounds showed significant antitumor effects. Their activity seemed to be little bit stronger than EGCG and prodelphinidin B3, known antitumor agent. (C) 2013 Elsevier Ltd. All rights reserved.