(3S,5aS,7aS,14aR,14bR)-1,2,3,7,7a,14,14a,14b-octahydro-3,13-dimethoxy-5,5,7a,9,14b-pentamethyl-6H-3,5a-epoxy-5H-furo<3,4-i>oxepino<4,9-a>xanthene-6,12(H)-dione | 96817-53-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: (3S,5aS,7aS,14aR,14bR)-1,2,3,7,7a,14,14a,14b-octahydro-3,13-dimethoxy-5,5,7a,9,14b-pentamethyl-6H-3,5a-epoxy-5H-furo<3,4-i>oxepino<4,9-a>xanthene-6,12(H)-dione
• 英文别名: (1S,4S,16R,17R,20S)-13,20-dimethoxy-4,7,17,22,22-pentamethyl-5,10,21,23-tetraoxahexacyclo[18.2.1.01,17.04,16.06,14.08,12]tricosa-6(14),7,12-triene-2,11-dione
• CAS: 96817-53-7
• 化学式: C₂₆H₃₂O₈
• 分子量: 472.535
• InChiKey: ZHUYKOMQZDAAAB-NDYVSCQDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  34
• 可旋转键数：
  2
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.69
• 拓扑面积：
  89.5
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  (3S,5aS,7aS,14aR,14bR)-1,2,3,7,7a,14,14a,14b-octahydro-3,13-dimethoxy-5,5,7a,9,14b-pentamethyl-6H-3,5a-epoxy-5H-furo<3,4-i>oxepino<4,9-a>xanthene-6,12(H)-dione 在 sodium tetrahydroborate 作用下， 以 甲醇 为溶剂， 以91%的产率得到(3S)-1,2,3,6,7,7A,10,14,14ab,14b-十氢-6a-羟基-3Α,13-二甲氧基-5,5,7ab,9,14ba-五甲基-12H-3b,5ab-环氧-5H-呋喃并[3,4-I]氧杂卓并[4,3-a]氧杂蒽-12-酮
  参考文献：
  名称：

  Total Synthesis of (-)-Austalide B. A Generic Solution to Elaboration of the Pyran/p-Cresol/Butenolide Triad

  摘要：

  The toxic meroterpenoid (-)-austalide B has been prepared in its natural form by chemical modification of the readily available optically active enedione 11. Following stereocontrolled Robinson annulation to give 13 and fully regiocontrolled gem-dimethylation of this intermediate, the highly functionalized tetracyclic ortho ester 22 was produced in four additional steps. At this point, it proved an easy matter to obtain 23 by Baeyer-Villiger oxidation. For the purpose of annealing rings E and F, carbomethoxy trinate 41 was prepared and coupled to 42 through the agency of Pd-2(dba)(3) and (furyl)(3)P. With arrival at 39, it proved possible by sequential intramolecular Claisen condensation, O-methylation, and modest warming to produce 50. Deprotection of the secondary hydroxyl and inversion of its configuration delivered synthetic austalide B, which exhibited melting point, specific rotation, infrared, and NMR properties (H-1 and C-13) identical to the natural material obtained from South Africa.

  DOI：

  10.1021/ja00104a012
• 作为产物：
  描述：

  (3S,5aR,6S,7aS,14aR,14bR)-1,2,3,6,7,7a,10,14,14a,14b-decahydro-3,13-dimethoxy-5,5,7a,9,14b-pentamethyl-6-<<2-(trimethylsilyl)ethoxy>methoxy>-12H-3,5a-epoxy-5H-furo<3,4-i>oxepino<4,9-a>xanthene-12-one 在 四丙基高钌酸铵 、 四丁基氟化铵 作用下， 以 六甲基磷酰三胺 、 二氯甲烷 为溶剂， 生成 (3S,5aS,7aS,14aR,14bR)-1,2,3,7,7a,14,14a,14b-octahydro-3,13-dimethoxy-5,5,7a,9,14b-pentamethyl-6H-3,5a-epoxy-5H-furo<3,4-i>oxepino<4,9-a>xanthene-6,12(H)-dione
  参考文献：
  名称：

  Enantioselective synthesis of natural (-)-austalide B, an unusual ortho ester metabolite produced by toxigenic cultures of Aspergillus ustus

  摘要：

  DOI：

  10.1021/ja00085a075