Facile access to chiral chromanone-2-carboxylic acids enabled by rhodium-catalyzed chemo- and enantioselective hydrogenation

Chem Commun (Camb). 2022 May 12;58(39):5837-5840. doi: 10.1039/d2cc00589a.

Abstract

Rh-catalyzed highly chemo- and enantioselective hydrogenation of chromone-2-carboxylic acids was successfully established for the first time, providing a wide range of enantiopure chromanone-2-carboxylic acids with excellent results (up to 97% yield and 99% ee) and high efficiency (up to 10 000 TON). The carboxylic group in the substrate was demonstrated to play a vital role and an enantio-induction mode was elucidated by DFT calculation. This hydrogenation protocol provided straightforward access to various bioactive chromanoids.

MeSH terms

  • Carboxylic Acids
  • Catalysis
  • Hydrogenation
  • Rhodium*
  • Stereoisomerism

Substances

  • Carboxylic Acids
  • Rhodium