quinolactacin B | 319917-26-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 喹啉及其衍生物
• 英文名称: quinolactacin B
• 英文别名: (3S)-4-methyl-3-propan-2-yl-2,3-dihydropyrrolo[3,4-b]quinoline-1,9-dione
• CAS: 319917-26-5
• 化学式: C₁₅H₁₆N₂O₂
• 分子量: 256.304
• InChiKey: YCGFIOZHNUQYSK-LBPRGKRZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  19
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  49.4
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  tert-butyl (3S)-4-methyl-1,9-dioxo-3-propan-2-yl-3H-pyrrolo[3,4-b]quinoline-2-carboxylate 在 zinc dibromide 作用下， 以 二氯甲烷 为溶剂， 反应 12.0h， 以94%的产率得到quinolactacin B
  参考文献：
  名称：

  Enantioselective total synthesis of (S)-(−)-quinolactacin B

  摘要：

  The enantioselective total synthesis of (-)-quinolactacin B (-)-1 was performed in seven steps and 33% overall yield from tryptamine. The synthesis features the use of ruthenium catalytic asymmetric hydrogen reaction to introduce the chirality in dihydro-beta-carboline 2. Based on Noyori's work, the hydrogenation using the (R,R)-TsDPEN-Ru complex produces dihydro-beta-carbolines possessing the (S) absolute configuration, the corrected asymmetric center of the natural product. The synthetic quinolactacin B displayed optical rotations that was in accordance with that of the natural product, thereby supporting the (S) configuration for natural quinolactacin B. The final product's stereochemical assignment is in agreement with that proposed by Nakagawa and co-workers. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2008.04.130

文献信息

• ENANTIOSELECTIVE SYNTHESIS OF ASYMMETRIC BETA-CARBOLINE INTERMEDIATES
  申请人：Santos Leonardo

  公开号：US20110245503A1

  公开（公告）日：2011-10-06

  Described herein is a new asymmetric synthesis of imines to obtain β-carboline derivatives useful as key intermediate compounds for the synthesis of phosphodiesterase inhibitors using a new process with palladium or ruthenium hydride and/or nickel boride to reduce chiral intermediates. The use of chloroformate chiral auxiliaries is further described for the reduction and asymmetric hydrogenation of imines to obtain β-carboline derivatives and intermediate compounds used in the preparation thereof.

  本文介绍了一种新的不对称合成亚胺的方法，以获得β-咔啉衍生物，这些衍生物是合成磷酸二酯酶抑制剂的关键中间体化合物。该方法使用钯或钌氢化物和/或镍硼化物来还原手性中间体。进一步描述了氯甲酸酯手性辅助剂的使用，用于还原和不对称氢化亚胺，以获得β-咔啉衍生物和用于制备它们的中间体化合物。