reaction of oximes with vinyl azides or homocoupling of oximes is reported. Oximes could serve as a directing group and an internal oxidant in the transformation. This reaction features good functional group tolerance and provides a useful protocol for the synthesis of different kinds of isoquinolines under mild conditions. Some control experiments and 15N isotope labeling experiments were conducted for
Methyl Ketone Oxime Esters as Nucleophilic Coupling Partners in Pd-Catalyzed C–H Alkylation and Application in the Synthesis of Isoquinolines
作者:Zhi-Wei Zhang、Aijun Lin、Jiong Yang
DOI:10.1021/jo5010586
日期:2014.8.1
excellent coupling partners for C(sp2)–C(sp3) bond formation via Pd-catalyzed aromatic C–H activation. This transformation forms the basis of an approach to regioselectively synthesize substituted isoquinolines via coupling with aryloxime esters. Our mechanistic studies suggested that the reaction proceeded through Pd(II)-catalyzed aromatic C–H activation, tautomerization, and a 1,3-shift of the palladacycle-ligated