3-epi-alloyohimbinone | 83540-87-8

• 分子结构分类: 有机化合物 - 生物碱及其衍生物 - 柯楠因类生物碱
• 英文名称: 3-epi-alloyohimbinone
• CAS: 83540-87-8
• 化学式: C₂₁H₂₄N₂O₃
• 分子量: 352.433
• InChiKey: XRPLBLPRUDFFCC-UBTURXDTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.86
• 重原子数：
  26.0
• 可旋转键数：
  1.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  62.4
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  3-epi-alloyohimbinone 在 sodium tetrahydroborate 作用下， 以 甲醇 为溶剂， 反应 0.33h， 生成 (+/-)-3-epi-alloyohimbine 、 (+/-)-3-epi-17-epi-alloyohimbine
  参考文献：
  名称：

  Total syntheses of yohimbe alkaloids, with stereoselection for the normal, allo, and 3-epiallo series, based on annelations of 4-methoxy-1,2-dihydropyridones

  摘要：

  N-[2-(1H-3-indolyl)ethyl]-2,3-dihydro-4-pyridone (31) was generated in two steps (77% yield) from tryptamine and N-methyl-4-piperidone methiodide. Its cyclization (90% yield) and oxidation (91% yield) provided the tetracyclic analogue 32. O-Methylation and Robinson-type annelation of these vinylogous lactams (the latter in form of its N(a)-carbamate) furnished the dienones 38 (64%) and 43 (90%). Further elaboration by cyclization and/or reduction reactions selectively provided the 15,16-didehydroyohimbinones 7 or 44. Their reductions then led to yohimbinone (52, 20% overall yield from tryptamine), alloyohimbinone (11, 19% overall yield), and 3-epi-alloyohimbinone (10, 23% overall yield), which led to yohimbine (3), beta-yohimbine (9), 3-epi-alloyohimbine (53), and 3-epi-17-epi-alloyohimbine (54).

  DOI：

  10.1021/jo00008a025
• 作为产物：
  描述：

  N-[2-(1H-吲哚-3-基)乙基]甲酰胺 在 palladium on activated charcoal 盐酸 、 4-二甲氨基吡啶 、 1,4-diazabicyclo[5.4.0]-7-undecene 、 次氯酸叔丁酯 、 水 、 氢气 、 sodium methylate 、 铜 、 三氟乙酸 、 锌 、 三氯氧磷 作用下， 以 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 20.26h， 生成 3-epi-alloyohimbinone
  参考文献：
  名称：

  Total syntheses of yohimbe alkaloids, with stereoselection for the normal, allo, and 3-epiallo series, based on annelations of 4-methoxy-1,2-dihydropyridones

  摘要：

  N-[2-(1H-3-indolyl)ethyl]-2,3-dihydro-4-pyridone (31) was generated in two steps (77% yield) from tryptamine and N-methyl-4-piperidone methiodide. Its cyclization (90% yield) and oxidation (91% yield) provided the tetracyclic analogue 32. O-Methylation and Robinson-type annelation of these vinylogous lactams (the latter in form of its N(a)-carbamate) furnished the dienones 38 (64%) and 43 (90%). Further elaboration by cyclization and/or reduction reactions selectively provided the 15,16-didehydroyohimbinones 7 or 44. Their reductions then led to yohimbinone (52, 20% overall yield from tryptamine), alloyohimbinone (11, 19% overall yield), and 3-epi-alloyohimbinone (10, 23% overall yield), which led to yohimbine (3), beta-yohimbine (9), 3-epi-alloyohimbine (53), and 3-epi-17-epi-alloyohimbine (54).

  DOI：

  10.1021/jo00008a025

文献信息

• Wenkert, Ernest, Heterocycles, 1984, vol. 21, # 1, p. 325 - 329
  作者：Wenkert, Ernest

  DOI：——

  日期：——