(+/-)-silychristin | 119435-01-7

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 2-芳基苯并呋喃类黄酮
• 英文名称: (+/-)-silychristin
• 英文别名: (+/-)-[2 alpha(2S*,3R*),3 beta]-3,5,7-Trihydroxy-2-[7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-2,3-dihydro-1-benzofuran-5-yl]-2,3-dihydro-4H-chromen-4-one；(2S,3S)-3,5,7-trihydroxy-2-[(2S,3R)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-2,3-dihydro-1-benzofuran-5-yl]-2,3-dihydrochromen-4-one
• CAS: 119435-01-7
• 化学式: C₂₅H₂₂O₁₀
• 分子量: 482.444
• InChiKey: BMLIIPOXVWESJG-XMXZYVDCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  35
• 可旋转键数：
  4
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.24
• 拓扑面积：
  166
• 氢给体数：
  6
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  溴甲苯 、 (+/-)-silychristin 在 potassium carbonate 作用下， 以 丙酮 为溶剂， 反应 7.0h， 以47.7%的产率得到7-O-benzylsilychristin A
  参考文献：
  名称：

  Enzymatic oxidative dimerization of silymarin flavonolignans

  摘要：

  Dimerization of phenolic compounds can potentially enhance their biological (antioxidant) activity. We present here the selective oxidative dimerization of several flavonolignans from Silybum marianum seed extract, namely, silybin A (1a), silybin B (1b), silychristin (3), and silydianin (4) catalyzed by a laccase from Trametes versicolor. Selective benzylation of C-7 OH group of both silybins ensured the priority of the dimerization reaction, avoiding thus polymerization. C-C homodimers connected via E-rings of silybin A and B and silydianin dimers were successfully isolated after respective debenzylation. On the contrary, dimerization of 7-O-benzyl silychristin afforded a complex, inseparable mixture of the products. All isolated flavonolignan dimers exhibited significantly improved 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity compared to their monomers and, therefore, seem to be promising for further biological studies. (C) 2014 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.molcatb.2014.07.012
• 作为产物：
  描述：

  4-苄氧基-3-甲氧基苯乙酮 在 palladium on activated charcoal 盐酸 、 manganese(IV) oxide 、 氢氧化钾 、 sodium hydroxide 、 sodium tetrahydroborate 、 三氟化硼乙醚 、 氢气 、 双氧水 、 N,N-二异丙基乙胺 作用下， 以 1,4-二氧六环 、 甲醇 、 乙醇 、 二氯甲烷 、 溶剂黄146 为溶剂， 反应 23.83h， 生成 (+/-)-silychristin
  参考文献：
  名称：

  Total synthesis of silychristin, an antihepatotoxic flavonolignan.

  摘要：

  描述了水飞蓟汀（一种抗肝毒性黄酮木脂素）的全合成。关键中间体反式二氢苯并呋喃 (15) 的合成如下。用乙醚三氟化硼处理查耳酮环氧化物(9)，随后用硼氢化钠还原，仅得到赤式-1,2-二芳基-1,3-丙二醇(10)。在钯催化剂上用氢气氢解10，然后用三氟化硼醚合物在乙酸中环化脱苄基产物(13)，得到单一产物15。

  DOI：

  10.1248/cpb.37.1441

文献信息

• Total synthesis of silychristin, an antihepatotoxic flavonolignan
  作者：Hitoshi Tanaka、Masaru Hiroo、Kazuhiko Ichino、Kazuo Ito

  DOI：10.1039/c39880000749

  日期：——

  The first total synthesis of silychristin is reported; the key intermediate [the dihydrobenzofuran (9)] was easily prepared in three steps from the readily available chalcone epoxide (6).

  据报道，首次合成了水飞蓟素。关键中间体[二氢苯并呋喃（9）]可以容易地从容易获得的查尔酮环氧化物（6）分三步制备。
• Enzymatic oxidative dimerization of silymarin flavonolignans
  作者：Paolo Gavezzotti、Eva Vavříková、Kateřina Valentová、Giovanni Fronza、Tukayi Kudanga、Marek Kuzma、Sergio Riva、David Biedermann、Vladimír Křen

  DOI：10.1016/j.molcatb.2014.07.012

  日期：2014.11

  Dimerization of phenolic compounds can potentially enhance their biological (antioxidant) activity. We present here the selective oxidative dimerization of several flavonolignans from Silybum marianum seed extract, namely, silybin A (1a), silybin B (1b), silychristin (3), and silydianin (4) catalyzed by a laccase from Trametes versicolor. Selective benzylation of C-7 OH group of both silybins ensured the priority of the dimerization reaction, avoiding thus polymerization. C-C homodimers connected via E-rings of silybin A and B and silydianin dimers were successfully isolated after respective debenzylation. On the contrary, dimerization of 7-O-benzyl silychristin afforded a complex, inseparable mixture of the products. All isolated flavonolignan dimers exhibited significantly improved 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity compared to their monomers and, therefore, seem to be promising for further biological studies. (C) 2014 Elsevier B.V. All rights reserved.
• Total synthesis of silychristin, an antihepatotoxic flavonolignan.
  作者：Hitoshi TANAKA、Masaru HIROO、Kazuhiko ICHINO、Kazuo ITO

  DOI：10.1248/cpb.37.1441

  日期：——

  The total synthesis of silychristin, an antihepatotoxic flavonolignan, is described. The key intermediate, the transdihydrobenzofuran (15) was synthesized as follows. Treatment of the chalcone epoxide (9) with boron trifluoride etherate and subsequent reduction with sodium borohydride gave exclusively the erythro-1, 2-diaryl-1, 3-propanediol (10). Hydrogenolysis of 10 with hydrogen over a palladium catalyst followed by cyclization of the debenzylation product (13) with boron trifluoride etherate in acetic acid afforded 15 as a single product.

  描述了水飞蓟汀（一种抗肝毒性黄酮木脂素）的全合成。关键中间体反式二氢苯并呋喃 (15) 的合成如下。用乙醚三氟化硼处理查耳酮环氧化物(9)，随后用硼氢化钠还原，仅得到赤式-1,2-二芳基-1,3-丙二醇(10)。在钯催化剂上用氢气氢解10，然后用三氟化硼醚合物在乙酸中环化脱苄基产物(13)，得到单一产物15。