The catalytic reaction of ketoximes with aryliodides via a Beckmann rearrangement in the presence of a catalytic amount of Pd(OAc)2, Ag2O and ZnBr2 gave substituted phenanthridines in good to excellent yield. In the reaction, aromatic ketoximes converted first to acetanilides in the presence of ZnBr2/TFA via a Beckmann rearrangement followed by arylation in the presence of palladium complex. Furthermore
Electrochemical Decarboxylative Cyclization of α‐Amino‐Oxy Acids to Access Phenanthridine Derivatives
作者:Yanling Zhan、Changhui Dai、Zitong Zhu、Ping Liu、Peipei Sun
DOI:10.1002/asia.202101388
日期:2022.3.14
compounds found in pharmaceuticals and natural products. Herein, an efficient electrochemical decarboxylative cyclization of α-amino-oxy acids to synthesize phenanthridine derivatives was developed. This reaction proceeded through iminyl radical formation cascade intramolecular cyclization from readily available materials under transition-metal-free and mild conditions.
Ruthenium-catalyzed ortho-arylation of acetanilides with aromatic boronic acids: an easy route to prepare phenanthridines and carbazoles
作者:Ravi Kiran Chinnagolla、Masilamani Jeganmohan
DOI:10.1039/c3cc49398a
日期:——
A regioselective ruthenium-catalyzed ortho-arylation of acetanilides with aromatic boronic acids is described. Later, ortho-arylated acetanilides were converted into phenanthridine and carbazole derivatives.