(-)-heliotridane picrate | 134457-92-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 酚类
• 英文名称: (-)-heliotridane picrate
• 英文别名: (-)-heliotridane; picrate；(-)-Heliotridan; Picrat
• CAS: 134457-92-4
• 化学式: C₆H₃N₃O₇*C₈H₁₅N
• 分子量: 354.32
• InChiKey: ZWPSTRYKNHMQLZ-WSZWBAFRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.61
• 重原子数：
  25.0
• 可旋转键数：
  3.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  152.89
• 氢给体数：
  1.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  (-)-heliotridane picrate 生成 (-)-heliotridane
  参考文献：
  名称：

  Stereoselective Synthesis of (7aS)-1-Methylenehexahydro-1H-pyrrolizine and (−)-Heliotridane from N-Diphenylmethyl-(S)-proline Ethyl Ester

  摘要：

  生物碱(7aS)-1-亚甲基六氢-1H-吡咯啉是通过N-二苯甲基-(S)-脯氨酸乙酯与氯化镍存在下的乙基溴化镁进行环丙烷化反应合成的，随后在氮原子上替换保护基团，以及对(S)-1-(1-乙氧基羧基吡咯烷-2-基)环丙基磺酸酯进行阳离子环丙基烯丙基异构化反应，得到相应的烯丙基溴化物。采用四氢硼钠在氯化镍的存在下选择性还原(7aS)-1-亚甲基六氢-1H-吡咯啉，最终高收率地获得了(−)-海灯草烷[(1S,7aS]-1-甲基六氢-1H-吡咯啉]。

  DOI：

  10.1007/s11178-005-0123-0
• 作为产物：
  描述：

  5-(1-Methyl-allyl)-1-((S)-1-phenyl-ethyl)-pyrrolidin-2-one 在 lithium aluminium tetrahydride 、 氨 、 双氧水 、 sodium 、 二(3-甲基丁烷-2-基)硼烷 、 sodium hydride 、 三乙胺 作用下， 生成 (-)-heliotridane picrate
  参考文献：
  名称：

  Enantioselective total syntheses of indolizidine alkaloids (-)-205A and (-)-235B

  摘要：

  Enantioselective total syntheses of indolizidine alkaloids (-)-205A and (-)-235B are described. The syntheses proceed via a common late-stage intermediate, alpha-aminonitrile 1. Absolute stereochemical control over the C8 and C8a stereocenters in these materials was achieved by a stereoselective crotylation reaction between chiral acyliminium ion (R)-3b and crotylmagnesium chloride. The selectivity of this reaction, which produced the (future)-8R,8aS configuration was complementary to the result obtained by crotylation of acyliminium ion (S)-3a with trans-crotyltrimethylsilane, which produced predominantly an adduct with the (future)-8S,8aS configuration. This latter crotyl lactam was converted to two additional diastereomers of alkaloid 205A. Comparison of the H-1 and C-13 NMR and optical rotation values of the four synthetic diastereomers of 205A with literature values supported the proposed assignment of the absolute and relative configuration of (-)-205A. The C-13 spectrum of synthetic (5R,8R,8aS)-235B was identical with that of natural 235B and supported the proposed assignment of relative configuration of the alkaloid. The optical rotation differed in sign and magnitude from the published value. Revised values of the optical rotations of (-)-205A and (-)-235B are suggested. This work constitutes the first enantioselective syntheses of 205A and 235B, which were prepared in 15 and 14 steps, respectively, from succinic anhydride, in an average overall yield of 17%.

  DOI：

  10.1021/jo00016a013