高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (8): 1707.doi: 10.7503/cjcu20170847

• 有机化学 • 上一篇    下一篇

叔胺硫脲催化的2,5-二羟基-1,4-二噻烷与氮叔丁氧羰基醛亚胺的不对称[3+2]环化反应

董旭, 封博谞, 陈莉(), 李鑫   

  1. 南开大学元素有机化学国家重点实验室, 化学学院, 天津 300071
  • 收稿日期:2017-12-26 出版日期:2018-08-10 发布日期:2018-06-13
  • 作者简介:联系人简介: 陈 莉, 女, 博士, 副教授, 主要从事有机合成方法学及天然产物全合成方面的研究. E-mail: chenliyss@nankai.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21390400, 21421062)资助.

Asymmetric [3+2] Annulations of 1,4-Di-thiane-2,5-diol and N-Boc Aldimines Catalyzed by Tertiary-amine Thiourea

DONG Xu, FENG Boxu, CHEN Li*(), LI Xin   

  1. State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2017-12-26 Online:2018-08-10 Published:2018-06-13
  • Contact: CHEN Li E-mail:chenliyss@nankai.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21390400, 21421062).

摘要:

以双功能手性叔胺硫脲作为催化剂, 用于催化2,5-二羟基-1,4-二噻烷与氮叔丁氧羰基(N-Boc)醛亚胺的不对称[3+2]环化反应. 实验结果表明, 在10%(摩尔分数)手性催化剂的作用下, 反应底物均能高产率地转化成目标产物, 并且得到高达95%的对映选择性和7:1的非对映选择性, 实现了一系列含有四氢噻唑骨架的双手性中心化合物的合成.

关键词: 3+2]环化反应, 噻唑烷, 叔胺硫脲, 有机催化

Abstract:

A highly enantioselective asymmetric [3+2] annulation of 1,4-di-thiane-2,5-diol and N-tert-butoxy-carbonyl(N-Boc) aldimines was catalyzed by a bifunctional tertiary-amine thiourea catalyst. The N-Boc aldimine was assumed to be activated and oriented by the hydrogen bonds of the thiourea, meanwhile the tertiary amine of the catalyst would provide suitable basicity to enhance the nucleophilicity of the mercaptoace-taldehyde. This method realized the construction of double chiral center via a one-step synthesis. As a result, a number of chiral thiazolidine scaffolds, which present in bioactive molecules widely, were smoothly synthesized with 10%(molar fraction) chiral catalysts, and achieved up to 95% enantioselectivity and 7:1 diastereoselectivity in good yields.

Key words: 3+2] Annulation, Thiazolidine, Tertiary amine thiourea, Organocatalysis

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