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