[4,8]-2,3-trans-3,4-trans:2,3-trans-deca-O-acetyl-bi-(+)-catechin | 21179-22-6

• 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: [4,8]-2,3-trans-3,4-trans:2,3-trans-deca-O-acetyl-bi-(+)-catechin
• 英文别名: catechin-(4α->8)-catechin decaacetate；catechin-(4α,8)-catechin peracetate；decaacetate of procyanidin B₃；procyanidin B3 acetate；procyanidin B3 decaacetate；[(2R,3S)-5,7-diacetyloxy-2-(3,4-diacetyloxyphenyl)-8-[(2R,3S,4S)-3,5,7-triacetyloxy-2-(3,4-diacetyloxyphenyl)-3,4-dihydro-2H-chromen-4-yl]-3,4-dihydro-2H-chromen-3-yl] acetate
• CAS: 21179-22-6
• 化学式: C₅₀H₄₆O₂₂
• 分子量: 998.902
• InChiKey: XVPHXHFVALQSOB-RQKDNSMESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  72
• 可旋转键数：
  23
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.32
• 拓扑面积：
  282
• 氢给体数：
  0
• 氢受体数：
  22

反应信息

• 作为产物：
  描述：

  原花清素B3 、 乙酸酐 在 吡啶 作用下， 反应 24.0h， 生成 [4,8]-2,3-trans-3,4-trans:2,3-trans-deca-O-acetyl-bi-(+)-catechin
  参考文献：
  名称：

  醋栗木原花色素和间苯三酚衍生物。

  摘要：

  从鼠尾草（Polygonaceae）的地上部分的丙酮-水提取物中的乙酸乙酯可溶级分中，可以得到各种单体黄烷-3-醇（儿茶素，表儿茶素，表儿茶素-3-O-没食子酸酯），A- B型原花青素和炔丙基炔醇（15个二聚体，7个三聚体，2个四聚体）与5种迄今未知的天然产物分离。二聚体：原花青素B1，B2，B3，B4，B5，B7，A2，表阿哌齐林-（4beta-> 8）-表儿茶素，表阿哌齐林-（4beta-> 8）-表儿茶素-3-O-没食子酸酯（新的天然产物），Epiafzelechin-（4β-> 6）-表儿茶素-3-O-没食子酸酯（新天然产物），epiafzelechin-3-O-没食子酸酯-（4beta-> 8）-epicatechin-3-O-没食子酸酯，B2 -3'-O-没食子酸酯，B2-3,3'-二-O-没食子酸酯，B5-3'-O-没食子酸酯和B5-3,3'-二-O-没食子酸酯。三聚体：原花青素C1，表阿奇西林-（4beta->

  DOI：

  10.1016/j.fitote.2009.08.015

文献信息

• Synthetic studies of proanthocyanidins. Part 2: Stereoselective gram-scale synthesis of procyanidin-B3
  作者：Akiko Saito、Noriyuki Nakajima、Akira Tanaka、Makoto Ubukata

  DOI：10.1016/s0040-4020(02)00936-5

  日期：2002.9

  A stereoselective synthesis of procyanidin-B3, a condensed catechin dimer, is described. Condensation of benzylated catechin with various 4-O-alkylated flavan-3,4-diol derivatives as an electrophile in the presence of a Lewis acid led to protected procyanidin-B3 and its diastereomer. In particular, the reaction using (2R,3S,4S)-3-acetoxy-5,7,3′,4′-tetrabenzyloxy-4-(2″-ethoxyethoxy)flavan as an electrophile

  描述了花青素-B3（一种儿茶素缩合二聚体）的立体选择性合成。在路易斯酸的存在下，苄基儿茶素与各种4 - O-烷基化的flavan-3,4-二醇衍生物作为亲电试剂的缩合导致被保护的原花青素-B3及其非对映异构体。特别地，在TMSOTf存在下，使用（2 R，3 S，4 S）-3-乙酰氧基-5,7,3'，4'-四苄氧基-4-（2“-乙氧基乙氧基）黄酮作为亲电试剂的反应在-78℃下，得到具有高立体选择性和优良分离产率的八-O-苄基化花青素-B3。此外，我们成功地完成了保护性原花青素B3的立体选择性克级合成。
• Characterization and trypsin inhibitor activity of proanthocyanidins from Vicia faba
  作者：Johannes P.F.G. Helsper、Johanna M. Hoogendijk、Arend van Norel、Herbert Kolodziej

  DOI：10.1016/0031-9422(91)80011-o

  日期：1993.11

  and B-4, and the prodelphinidins gallocatechin-(4α,8)-catechin, gallocatechin-(4α,8)-epicatechin and gallocatechin-(4α,8)-epigallocatechin have been isolated from the testa of faba beans and characterized by means of spectroscopic methods. Proanthocyanidin samples were compared for their trypsin inhibitory activity. The results suggest that the degree of polymerization, the number of phenolic hydroxyl

  摘要 在一项化学研究中，表儿茶素、表没食子儿茶素、原花青素 B-1、B-3 和 B-4，以及原飞燕草素没食子儿茶素-(4α,8)-儿茶素、没食子儿茶素-(4α,8)-表儿茶素和没食子儿茶素-(4α ,8)-表没食子儿茶素已从蚕豆的种皮中分离出来，并通过光谱方法进行了表征。比较原花青素样品的胰蛋白酶抑制活性。结果表明聚合度、酚羟基数量和组成单元的2,3-立体化学显着影响抑制强度。
• Extensive high-resolution reverse 2D NMR analysis for the structural elucidation of procyanidin oligomers
  作者：Laurence Balas、Joseph Vercauteren

  DOI：10.1002/mrc.1260320703

  日期：1994.7

  The structures of the procyanidin dimers catechin‐(4α–8)‐catechin and catechin‐(4α–6)‐catechin were proved by spectroscopic means. To distinguish between the two possible interflavanoid linkages, it is necessary to assign all the quaternary aromatic carbon signals. How these assignments can be made through two‐dimensional NMR spectroscopy is described.

  通过光谱方法证明了原花青素二聚体儿茶素-(4α-8)-儿茶素和儿茶素-(4α-6)-儿茶素的结构。为了区分两种可能的类黄酮间键，有必要分配所有的季芳碳信号。描述了如何通过二维核磁共振光谱进行这些分配。
• Synthesis and characterization of procyanidin dimers as their peracetates and octamethyl ether diacetates
  作者：Herbert Kolodziej

  DOI：10.1016/s0031-9422(00)81582-4

  日期：1986.4
• Carbon-14 Biolabeling of (+)-Catechin and Proanthocyanidin Oligomers in Willow Tree Cuttings
  作者：Stéphanie Déprez、Isabelle Mila、Augustin Scalbert

  DOI：10.1021/jf981380z

  日期：1999.10.1

  Proanthocyanidin polymers, oligomers, and the structurally related monomer (+)-catechin were labeled by incorporation of radioactive precursors in shoots of willow tree (Salix caprea L.). [1-C-14]-Acetate and [U-C-14]-phenylalanine precursors were fed through the cut stems or petioles of leaves. Optimization of several parameters such as the nature and origin of the plant material, leaf maturity, nature, and quantity of radioactive precursor applied and the duration of metabolism led to incorporation yields of 3.2% and to specific activities of 500 mu Ci/g. Detailed characterization of the products (polymerization degree, procyanidin/prodelphinidin ratio, specific activities) and purification by chromatography are reported. Some sugars bound to radiolabeled proanthocyanidin polymers were removed by enzymic treatment with a mixture of glycosidases. A radioactive purity close to 100% and specific activities suitable for bioavailability studies were obtained.