it is possible to activate toluene efficiently and use it directly for the benzylation of different 2-aminopyridines. The transformation is not restricted to simple toluene, but also substituted derivatives give the desired product in good yields. Effective cleavage of the pyridine moiety is presented.
One-Pot Access to <i>peri</i>-Condensed Heterocycles via Manganese-Catalyzed Cascade C–N and C–C Bond Formation
作者:Yunliang Yu、Yadong Feng、Remi Chauvin、Shuangshuang Ma、Lianhui Wang、Xiuling Cui
DOI:10.1021/acs.orglett.8b01586
日期:2018.7.20
A Mn(III)-catalyzed three-component cascade C–H/N–H functionalization of 2-aminopyridines with 2 equiv of dialkyl butyndioates leads to peri-condensed tricylic azines through a selective, but partly destructive, stoichiometry. A wide range of 2,11-diazatricyclo[5.3.1.04,11]undeca-1(10),4,6,8-tetraen-3-ones were thus obtained with moderate to high yields in a step-economical fashion under mild conditions