Copper-Catalyzed Nondecarboxylative Cross Coupling of Alkenyltrifluoroborate Salts with Carboxylic Acids or Carboxylates: Synthesis of Enol Esters
作者:Fang Huang、Tan D. Quach、Robert A. Batey
DOI:10.1021/ol4013712
日期:2013.6.21
A mild copper-catalyzed Chan–Lam–Evans type cross-coupling reaction for the regioselective and stereospecific preparation of (E)- or (Z)-enol esters is described. The method couples carboxylate salts or carboxylic acids with potassiumalkenyltrifluoroboratesalts in the presence of catalytic CuBr and DMAP with 4 Å molecular sieves under O2 at 60 °C. Overall, this method demonstrates carboxylic acids