Rh(III)-Catalyzed C–H Bond Activation along with “Rollover” for the Synthesis of 4-Azafluorenes
摘要:
An intramolecular reaction of 3-alkynyl and 3-alkenyl-2-arylpyridines selectively gave 4-azafluorene compounds in the presence of a catalytic amount of [Cp*RhCl2](2) and Cu(OAc)(2). Pyridine-directed C-H bond activation along with "rollover" are likely to be key steps of this transformation.
Sequential C–H and C–C Bond Cleavage: Divergent Constructions of Fused <i>N</i>-Heterocycles via Tunable Cascade
作者:Xianwei Li、Jianhang Rao、Wensen Ouyang、Qian Chen、Ning Cai、Yu-Jing Lu、Yanping Huo
DOI:10.1021/acscatal.9b03091
日期:2019.9.6
multiple cascade reactions for the divergent assembly of fused N-heterocycles, comprising sequential activation of C–H and C–C bonds. Isolatable indene-type intermediates might be responsible for the generation of densely substituted fused pyridines, azepines, and azafluorenones products. The tolerance of stronglycoordinatingN-heterocycles, and those readily applicable for the late-stage modifications