The Pd-catalyzed cross-coupling ethoxycarbonylation of aryl boronic acids with N-aryl-α-iminoesters affords aryl carboxylic esters via carbonyl-imino Ï bond cleavage. This unprecedented mode of reaction allows regioselective installation of the ethoxycarbonyl group into target molecules. Mechanism studies have revealed that an unusual 1,2-aryl shift process is involved in the transformation.
钯催化的芳基
硼酸与N-芳基α-
亚胺酯的交叉偶联乙氧羰基化反应,通过碳基-
亚胺σ键断裂形成芳基
羧酸酯。这种前所未有的反应模式允许将乙氧羰基团区域选择性地安装到目标分子中。机理研究表明,在该转化过程中涉及了一种不寻常的1,2-芳基迁移过程。