Regioselective synthesis of 2-unsubstituted 1-aryl-4- and 1-aryl-5-acylimidazoles
作者:Vitaly S. Mityanov、Ludmila G. Kuz'mina、Valery P. Perevalov、Iosif I. Tkach
DOI:10.1016/j.tet.2014.04.012
日期:2014.6
An efficient and simple method for the synthesis of 2-unsubstituted 1-aryl-4- and 1-aryl-5-acylimidazoles has been developed. It consists in the condensation of α-diketone monooximes with aromatic amines and formaldehyde on the presence of boron trifluoride etherate, leading to the formation of stable boron trifluoride complexes of N-oxides. Further reduction of these complexes led to the corresponding