tert-butyl (S)-1-<1-<2-(N,N-dibenzylamino)-4-hydroxybutyl>>-3-hydroxypyrrole-2-carboxylate | 159497-96-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: tert-butyl (S)-1-<1-<2-(N,N-dibenzylamino)-4-hydroxybutyl>>-3-hydroxypyrrole-2-carboxylate
• 英文别名: tert-butyl 1-[(2S)-2-(dibenzylamino)-4-hydroxybutyl]-3-hydroxypyrrole-2-carboxylate
• CAS: 159497-96-8
• 化学式: C₂₇H₃₄N₂O₄
• 分子量: 450.578
• InChiKey: FXMQPKMLBKTWKP-QHCPKHFHSA-N

物化性质

• 沸点：
  587.3±50.0 °C(predicted)
• 密度：
  1.11±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.7
• 重原子数：
  33
• 可旋转键数：
  12
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.37
• 拓扑面积：
  74.9
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  tert-butyl (S)-1-<1-<2-(N,N-dibenzylamino)-4-hydroxybutyl>>-3-hydroxypyrrole-2-carboxylate 在 四溴化碳 、 sodium hydride 、 三苯基膦 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 1.08h， 生成 tert-butyl (6S,8aR)-6-(N,N-dibenzylamino)-5,6,7,8-tetrahydro-1-oxo-8a(1H)-indolizinecarboxylate
  参考文献：
  名称：

  Enantiomerically Pure Amino Alcohols and Diamino Alcohols from L-Aspartic Acid. Application to the Synthesis of Epi- and Diepislaframine

  摘要：

  Starting from natural aspartic acid (6) a practical method for the synthesis of enantiomerically pure 3-amino alcohols 8 including 3,4-diamino derivatives is described. After perbenzylation of 6 and reduction of both carboxylates, position 4 of the resultant (dibenzylamino)butanediol (11) could be regioselectively blocked to afford the silyloxy-protected intermediate 12a. Functionalization of position 1 was accomplished by nucleophilic displacement reactions including a 2-fold migration of the dibenzylamino substituent or by reductive amination of the amino aldehyde 15. Both routes proceeded under complete preservation of the optical purity. For envisioned SAR studies, we, furthermore, report on the application of this method to a chirospecific synthesis of epi- and diepislaframine (9a and 9b) as diastereomers of the highly bioactive indolizidine alkaloid slaframine (9c). Our first approach including reductive coupling of the chiral amino aldehyde 15 with 5-hydroxypyrrolidine failed when formation of a quaternary ammonium salt occurred, preventing the anticipated anionic cyclization. Therefore, we turned out attention to methodology developed by Wasserman. In fact, introduction of a 3-hydroxypyrrole-2-carboxylate fragment gave a cyclization precursor (30b) which could be successfully transformed into epi- and diepislaframine.

  DOI：

  10.1021/jo00101a042
• 作为产物：
  描述：

  (R)-2-<1-(N,N-dibenzylamino)-4-<(tert-butyldimethylsilyl)oxy>butyl> methanesulfonate 在 sodium hydroxide 、 silica gel 、 一水合肼 、 lithium chloride 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 为溶剂， 反应 136.0h， 生成 tert-butyl (S)-1-<1-<2-(N,N-dibenzylamino)-4-hydroxybutyl>>-3-hydroxypyrrole-2-carboxylate
  参考文献：
  名称：

  Enantiomerically Pure Amino Alcohols and Diamino Alcohols from L-Aspartic Acid. Application to the Synthesis of Epi- and Diepislaframine

  摘要：

  Starting from natural aspartic acid (6) a practical method for the synthesis of enantiomerically pure 3-amino alcohols 8 including 3,4-diamino derivatives is described. After perbenzylation of 6 and reduction of both carboxylates, position 4 of the resultant (dibenzylamino)butanediol (11) could be regioselectively blocked to afford the silyloxy-protected intermediate 12a. Functionalization of position 1 was accomplished by nucleophilic displacement reactions including a 2-fold migration of the dibenzylamino substituent or by reductive amination of the amino aldehyde 15. Both routes proceeded under complete preservation of the optical purity. For envisioned SAR studies, we, furthermore, report on the application of this method to a chirospecific synthesis of epi- and diepislaframine (9a and 9b) as diastereomers of the highly bioactive indolizidine alkaloid slaframine (9c). Our first approach including reductive coupling of the chiral amino aldehyde 15 with 5-hydroxypyrrolidine failed when formation of a quaternary ammonium salt occurred, preventing the anticipated anionic cyclization. Therefore, we turned out attention to methodology developed by Wasserman. In fact, introduction of a 3-hydroxypyrrole-2-carboxylate fragment gave a cyclization precursor (30b) which could be successfully transformed into epi- and diepislaframine.

  DOI：

  10.1021/jo00101a042