Pd/Ming-Phos-Catalyzed Asymmetric Three-Component Arylsilylation of N-Sulfonylhydrazones: Enantioselective Synthesis of gem-Diarylmethine Silanes

J Am Chem Soc. 2022 Aug 31;144(34):15468-15474. doi: 10.1021/jacs.2c07037. Epub 2022 Aug 22.

Abstract

A Pd-catalyzed enantioselective three-component reaction of N-sulfonylhydrazones, aryl bromides, and silylboronic esters is developed, enabling the synthesis of chiral gem-diarylmethine silanes in high enantioselectivity with the use of a newly identified Ming-Phos. Compared with N-tosyl, the more easily decomposed N-mesitylsulfonyl is more suitable as the masking group of electron-rich hydrazone to improve the reaction efficiency. The reaction features a broad scope concerning both coupling partners, high enantioselectivity, and mild reaction conditions. The ready access to enantiomers and utility of this catalytic method are also presented.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Esters
  • Palladium*
  • Silanes*
  • Stereoisomerism

Substances

  • Esters
  • Silanes
  • Palladium