A Reagent for the One-Step Preparation of Potassium Acyltrifluoroborates (KATs) from Aryl- and Heteroarylhalides
作者:Gábor Erős、Yo Kushida、Jeffrey W. Bode
DOI:10.1002/anie.201403931
日期:2014.7.14
design and synthesis of a new reagent for their one‐step preparation from aryl‐ and heteroarylhalides. The reagent is a stable, soluble zwitterion prepared by S‐alkylation of a novel thioformamide trifluoroboronate. The KATs are prepared by adding one equivalent of nBuLi to a mixture of the aryl halide and the reagent at −78 °C. This protocol is suitable for the preparation of KATs containing pyridines
Catalytic Synthesis of Potassium Acyltrifluoroborates (KATs) through Chemoselective Cross‐Coupling with a Bifunctional Reagent
作者:Dino Wu、Nicole A. Fohn、Jeffrey W. Bode
DOI:10.1002/anie.201904576
日期:2019.8.5
Potassium acyltrifluoroborates (KATs) are increasingly important functional groups, and general methods for their preparation are of great current interest. We report a bifunctional iminium reagent bearing both a tin nucleophile and a trifluoroborate, which was applied in chemoselective Pd0‐catalyzed Migita–Kosugi–Stille cross‐coupling reactions owith aryl and vinyl halides. This method gives access