An efficient method for the synthesis of polyfunctional imidazoles from vinyl azides and amidine has been developed. Starting from vinyl azide and amidine, this transformation proceeds without any additives and the obtained imidazoles can be decorated with ester functional group that is a promising site for further modification.
Carbene Reactivity of 4-Diazo-4<i>H</i>-imidazoles toward Nucleophiles and Aromatic Compounds
作者:Matthew R. Smith、Alexander J. Blake、Christopher J. Hayes、Malcolm F. G. Stevens、Christopher J. Moody
DOI:10.1021/jo902165w
日期:2009.12.18
Carbenes derived from diazoimidazolecarboxylates 4 under thermal or photochemical conditions undergo O−H and N−H insertion reactions with alcohols and amines, respectively, in moderate yield, in competition with reduction in good H-donor solvents. Dichloromethane reacts to give the corresponding 4-chloroimidazole. Aromatic hydrocarbons are excellent traps for the imidazolylidene carbene and lead to