to access the isoquinolone motif via cross-coupling/cyclization of benzhydroxamic acid with alkynes is described. The reaction features a regioselective cleavage of a C-H bond on the benzhydroxamic acid coupling partner as well as a regioselective alkyne insertion. Mechanistic studies point out the important involvement of a N-Obond as a tool for C-Nbondformation and catalystturnover.
描述了通过苯异羟肟酸与炔烃的交叉偶联/环化获得异喹诺酮基序的无外部氧化剂过程。该反应的特点是区域选择性裂解苯异羟肟酸偶联物上的 CH 键以及区域选择性炔烃插入。机理研究指出 NO 键作为 CN 键形成和催化剂周转的工具的重要参与。