Formation and Disproportionation of Xanthenols to Xanthenes and Xanthones and Their Use in Synthesis

J Org Chem. 2021 Feb 19;86(4):3334-3343. doi: 10.1021/acs.joc.0c02694. Epub 2021 Jan 5.

Abstract

A facile and versatile strategy employing TiCl4-mediated cyclization followed by a Cannizzaro reaction has been developed for the synthesis of various xanthene derivatives. The reaction proceeded smoothly to afford both xanthenes/xanthones or their sulfur derivatives and tolerated a wide range of electronically diverse substrates. Using this methodology, pranoprofen was synthesized in three steps in 59% overall yield from commercially available starting materials.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Cyclization
  • Xanthenes*
  • Xanthones*

Substances

  • Xanthenes
  • Xanthones