Modular Cyclopentenone Synthesis through the Catalytic Molecular Shuffling of Unsaturated Acid Chlorides and Alkynes

J Am Chem Soc. 2020 Dec 16;142(50):20948-20955. doi: 10.1021/jacs.0c10832. Epub 2020 Dec 7.

Abstract

We describe a general strategy for the intermolecular synthesis of polysubstituted cyclopentenones using palladium catalysis. Overall, this reaction is achieved via a molecular shuffling process involving an alkyne, an α,β-unsaturated acid chloride, which serves as both the alkene and carbon monoxide source, and a hydrosilane to create three new C-C bonds. This new carbon monoxide-free pathway delivers the products with excellent yields. Furthermore, the regioselectivity is complementary to conventional methods for cyclopentenone synthesis. In addition, a set of regio- and chemodivergent reactions are presented to emphasize the synthetic potential of this novel strategy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkynes / chemistry*
  • Catalysis
  • Chemistry Techniques, Synthetic
  • Chlorides / chemistry*
  • Cyclopentanes / chemical synthesis*
  • Cyclopentanes / chemistry*

Substances

  • Alkynes
  • Chlorides
  • Cyclopentanes
  • cyclopentenone