Zn(OTf)2 promoted rearrangement of 1,2-cyclopropanated sugars with amines: a convenient method for the synthesis of 3-polyhydroxyalkyl-substituted pyrrole derivatives

Org Biomol Chem. 2015 Nov 28;13(44):10865-73. doi: 10.1039/c5ob01620g. Epub 2015 Sep 14.

Abstract

A rearrangement reaction of 1,2-cyclopropanated sugars with alkylamines or arylamines promoted by Zn(OTf)2 is described. The method offers a series of 3-polyhydroxyalkyl-substituted pyrrole derivatives with multiple chiral centers in moderate to excellent yields. The epimerization is achieved by inverting the stereochemistry at the free hydroxyl group of the resulting pyrrole, which would give access to many more possible stereoisomers.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amines / chemistry*
  • Carbohydrates / chemistry*
  • Cyclopropanes / chemistry*
  • Pyrroles / chemical synthesis
  • Pyrroles / chemistry*
  • Stereoisomerism
  • Zinc / chemistry*

Substances

  • Amines
  • Carbohydrates
  • Cyclopropanes
  • Pyrroles
  • cyclopropane
  • Zinc