The enantioselective construction of chiral spirooxindole-based 4-thiazolidinone via asymmetric catalytic formal [3+2] annulation using a bifunctional catalyst

Chem Commun (Camb). 2016 Feb 25;52(16):3418-21. doi: 10.1039/c5cc10292h. Epub 2016 Feb 2.

Abstract

4-Thiazolidinone is regarded as a privileged structural unit in bioactive compounds. However, there is still no example of a catalytic method for the synthesis of chiral 4-thiazolidinone until now. We reported herein a facile and efficient method for the construction of chiral spirooxindole-based 4-thiazolidinone. This methodology is based on the asymmetric formal [3+2] annulation of 1,4-dithiane-2,5-diol to ketimines which is followed by simple oxidation, featuring a broad substrate scope with high enantioselectivity (up to 98% ee). The method has been successfully applied to the synthesis of a novel class of mycobacterium tuberculosis inhibitor-spirooxindole based 4-thiazolidinone.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Spiro Compounds / chemistry*
  • Stereoisomerism
  • Thiazoles / chemistry*

Substances

  • Spiro Compounds
  • Thiazoles