Synthesis of Small 3-Fluoro- and 3,3-Difluoropyrrolidines Using Azomethine Ylide Chemistry

J Org Chem. 2015 Jul 17;80(14):7266-74. doi: 10.1021/acs.joc.5b00853. Epub 2015 Jun 24.

Abstract

Here, we report accessing small 3-fluoropyrrolidines and 3,3-difluoropyrrolidines through a 1,3-dipolar cycloaddition with a simple azomethine ylide and a variety of vinyl fluorides and vinyl difluorides. We demonstrate that vinyl fluorides within α,β-unsaturated, styrenyl and even enol ether systems can participate in the cycloaddition reaction. The vinyl fluorides are relatively easy to synthesize through a variety of methods, making the 3-fluoropyrrolidines very accessible.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Azo Compounds / chemistry*
  • Cycloaddition Reaction
  • Molecular Structure
  • Pyrrolidines / chemical synthesis*
  • Pyrrolidines / chemistry
  • Stereoisomerism
  • Thiosemicarbazones / chemistry*

Substances

  • Azo Compounds
  • Pyrrolidines
  • Thiosemicarbazones
  • azomethine