Improved Palladium Catalysis in Suzuki‐Type Coupling of Benzotriazinones for o‐Aryl/Alkenyl Benzamides

Author:

Xü Minling1,Xü Ke1,Zou Gang1ORCID

Affiliation:

1. School of Chemistry & Molecular Engineering East China University of Science & Technology 130 Meilong Rd Shanghai 200237 People's Republic of China

Abstract

AbstractA palladium catalyst system based on PdCl2(PPh3)2 or PdCl2(dppf) is reported for Suzuki‐type coupling of both N‐aryl and alkyl benzotriazinones with aryl/alkenyl boronic acids to afford a series of ortho‐aryl/alkenyl benzamides in yields up to 99%, showing improvements on catalytic efficiency, substrate scope and practicality. Scope and limitations of the improved protocol have been demonstrated with more than 40 examples, including a multigram‐scale synthesis of activated o‐biphenyl amide. Large electronic and steric effects from the boronic acid counterpart have been observed, implying the transmetallation from boron to palladium should be involved in the rate‐determining step in catalytic cycle.

Publisher

Wiley

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