(S)-(-)-2,2-dimethoxy-5,8,13,13a-tetrahydro-6H-dibenzo[a,g]quinolizine

• 分子结构分类: 有机化合物 - 生物碱及其衍生物 - 原小檗碱生物碱及其衍生物
• 英文名称: (S)-(-)-2,2-dimethoxy-5,8,13,13a-tetrahydro-6H-dibenzo[a,g]quinolizine
• 英文别名: (S)-2,3-dimethoxy-5,8,13,13a-tetrahydro-6H-dibenzo[a,g]quinolizine；(S)-(-)-O-methylbharatamine；(13aS)-(-)-5,8,13,13a-tetrahydro-2,3-dimethoxy-6H-dibenzo[a,g]quinolizine；(13aS)-2,3-dimethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline
• 化学式: C₁₉H₂₁NO₂
• 分子量: 295.381
• InChiKey: OPTJHLICZXOBIQ-KRWDZBQOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.3
• 重原子数：
  22
• 可旋转键数：
  2
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.37
• 拓扑面积：
  21.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  6,7-二甲氧基-3,4-二氢异喹啉 在 lithium aluminium tetrahydride 、 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 、 甲苯 为溶剂， 反应 25.0h， 生成 (S)-(-)-2,2-dimethoxy-5,8,13,13a-tetrahydro-6H-dibenzo[a,g]quinolizine
  参考文献：
  名称：

  （R）-（+）-和（S）-（-）- O-甲基巴拉特明的不对称合成

  摘要：

  （R）-（+）-和（S）-（-）- O-甲基巴拉特明的不对称合成是通过侧向金属化策略进行的，其中将（R）-和（S）-苯丙氨醇用作手性助剂。手性邻甲苯甲酰碳负离子向6,7-二甲氧基-3,4-二氢异喹啉的加成反应同时进行环化反应，得到2,3-二甲氧基-8-氧代心rb的两种对映体，收率高（76％）对映选择性（99％ee）。每种对映异构体的氢化铝锂还原导致（R）-（+）-和（S）-（-）- O-甲基巴拉塔明，而不会损失对映选择性。

  DOI：

  10.1016/j.tetasy.2004.06.038

文献信息

• Diastereoselective Pomeranz–Fritsch–Bobbitt synthesis of (S)-(−)-O-methylbharatamine using (S)-N-tert-butanesulfinimine as a substrate
  作者：Agnieszka Grajewska、Maria D. Rozwadowska

  DOI：10.1016/j.tetasy.2007.11.010

  日期：2007.12

  The protoberberine-type alkaloid, (S)-(-)-O-methylbharatamine, has been synthesized in six steps involving the addition of laterally lithiated o-toluamide to (S)-N-tert-butanesulfinimine as the crucial process. The target alkaloid was obtained in 24.4% overall yield with 88% ee. (c) 2007 Elsevier Ltd. All rights reserved.
• Synthesis of Both Enantiomers of Protoberberines via Laterally Lithiated (S)-4-Isopropyl-2-(o-tolyl)oxazolines
  作者：Masatomo Iwao、Tsutomu Fukuda

  DOI：10.3987/com-07-s(w)56

  日期：——
• Synthesis of (S)-(−)- and (R)-(+)-O-methylbharatamine using a diastereoselective Pomeranz–Fritsch–Bobbitt methodology
  作者：Maria Chrzanowska、Agnieszka Dreas、Maria D. Rozwadowska

  DOI：10.1016/j.tetasy.2005.07.025

  日期：2005.9

  Laterally lithiated (S)-(-)- and (R)-(+)-o-toluamides 6 with a chiral auxiliary derived from (S)- and (R)-phenylalaninol, respectively, were used as the building blocks and chirality inductors in the asymmetric modification of the Pomeranz-Fritsch-Bobbitt synthesis of isoquinoline alkaloids. Their addition to imine 2 proceeded with partial cyclization, giving isoquinolones (+)-7 and (-)-7 along with acyclic products, (-)-8 and (+)-8, respectively. LAH-reduction of (+)-7 and (-)-7, followed by cyclization, afforded both enantiomers of the alkaloid, (S)-(-)- and (R)-(+)-O-methylbharatamine 5, in 32% and 40% overall yield and with 88% and 73% ees, respectively. (c) 2005 Elsevier Ltd. All rights reserved.
• AN IMPROVED ASYMMETRIC SYNTHESIS OF alpha-BRANCHED CHIRAL AMINES
  申请人：PIRAMAL PHARMA LIMITED

  公开号：US20210114977A1

  公开（公告）日：2021-04-22

  The present invention relates to an improved asymmetric synthesis of alpha-branched amines (hereafter referred to as the compound) and relative chiral amines (1″) or its pharmaceutically acceptable salt and derivatives. The process comprises an unusual substrate specific regioselective ortho lithiation of substituted arene compounds, followed by its highly diastereoselective addition to N-tert-butanesulfinylimines resulting in the selective formation of alpha-branched sulfinyl amine and chiral amine; which on subsequently removing the sulfinyl group provides corresponding alpha-branched amines or relative chiral amines (1″).
• The asymmetric synthesis of (R)-(+)- and (S)-(−)-O-methylbharatamine
  作者：Maria Chrzanowska、Agnieszka Dreas

  DOI：10.1016/j.tetasy.2004.06.038

  日期：2004.8

  The asymmetric syntheses of (R)-(+)- and (S)-(−)-O-methylbharatamine were performed using the lateral metallation strategy, in which (R)- and (S)-phenylalaninol were applied as chiral auxiliaries. The addition reaction of chiral o-toluamide carbanion to 6,7-dimethoxy-3,4-dihydroisoquinoline proceeded with a simultaneous cyclization reaction, giving both enantiomers of 2,3-dimethoxy-8-oxoberbine in

  （R）-（+）-和（S）-（-）- O-甲基巴拉特明的不对称合成是通过侧向金属化策略进行的，其中将（R）-和（S）-苯丙氨醇用作手性助剂。手性邻甲苯甲酰碳负离子向6,7-二甲氧基-3,4-二氢异喹啉的加成反应同时进行环化反应，得到2,3-二甲氧基-8-氧代心rb的两种对映体，收率高（76％）对映选择性（99％ee）。每种对映异构体的氢化铝锂还原导致（R）-（+）-和（S）-（-）- O-甲基巴拉塔明，而不会损失对映选择性。