Access to Cycloalkeno[<i>c</i>]-Fused Pyridines via Pd-Catalyzed C(sp<sup>2</sup>)–H Activation and Cyclization of <i>N</i>-Acetyl Hydrazones of Acylcycloalkenes with Vinyl Azides
作者:Biao Nie、Wanqing Wu、Qingyun Ren、Zhongqing Wang、Ji Zhang、Yingjun Zhang、Huanfeng Jiang
DOI:10.1021/acs.orglett.0c02466
日期:2020.10.16
A novel Pd(II)-catalyzed vinylic C-H activation and cyclization has been developed, reacting a series of small, medium, and large N-acetyl hydrazones of acylcycloalkenes with vinyl azides to access diverse cycloalkeno[c]-fused pyridine scaffolds. This protocol provides progress in C(sp2)-H bond activation of medium to large cycloalkenes, and the target products can be obtained in a specific regioselectivity with good functional group tolerance and a broad substrate scope.