dihydropyrrole-functionalized phenanthridines were efficiently synthesized by the metal-free, radical cascade cyclization reaction of 2-isocyanobiphenyls with γ,δ-unsaturated oxime esters. The C–N/C–C/C–C bonds were formed via the oil bath method in a one-pot procedure with broad substrate applicability. The radical process was supported by kinetic isotope effect studies and radical inhibition studies.
Rh(I)-catalyzed decarbonylation synthesis of carbazoles via C–N cleavage
作者:Weizheng Fan、Shan Jiang、Bainian Feng
DOI:10.1016/j.tet.2015.04.058
日期:2015.6
A one-pot Rh(I)-catalyzed synthesis of 9-H carbazoles via C-N bond cleavage by activation of aldehyde C-H bonds is reported. This protocol offers good yields and tolerates a broad range of functional groups. Based on the extensive control experiments, we propose a plausible decarbonylation mechanism. (C) 2015 Elsevier Ltd. All rights reserved.