Catalytic Asymmetric Diarylation of Internal Acyclic Styrenes and Enamides

J Am Chem Soc. 2022 May 11;144(18):8389-8398. doi: 10.1021/jacs.2c03411. Epub 2022 Apr 28.

Abstract

Enantioselective transformations of olefins are among the most important strategies for the asymmetric synthesis of organic compounds. Chemo-, diastereo-, and stereoselective control of reactions with internal acyclic alkenes for the construction of functionalized acyclic alkanes still remain a persistent challenge. Here, we report a palladium-catalyzed asymmetric regiodivergent Heck-type diarylation of internal acyclic alkenes. The 1,2-diarylation of two accessible acyclic alkenes, cinnamyl carbamates and enamides with diazonium salts and aromatic boronic acids, furnishes products containing vicinal stereogenic centers via the stereospecific formation of carbonyl coordination-assisted transient palladacycles. Moreover, the asymmetric migratory diarylation of enamides enables the formation of incontiguous stereocenters by an interrupted diastereoselective 1,3-chain-walking process. This protocol streamlines access to highly functionalized multisubstituted enantioenriched carbamates and amine derivatives which are embedded in the key biologically active motifs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkenes*
  • Carbamates
  • Catalysis
  • Stereoisomerism
  • Styrenes*

Substances

  • Alkenes
  • Carbamates
  • Styrenes