C-5 functionalization of trisubstituted imidazoles with azodicarbonyl compounds
作者:Chiji Yamazaki、Hideshi Arima、Satoru Udagawa
DOI:10.1002/jhet.5570330107
日期:1996.1
Certain 1,2,4-trisubstituted imidazoles underwent electrophilic attack of azodicarbonylcompounds on the 5-position to form 5-(1,2-dialkoxycarbonyl)hydrazino- and 5-(4-phenyl-3,5-dioxo-1,2,4-triazolidin-1-yl)imidazole derivatives in moderate to high yields. The reaction was highly susceptible to the nature and the substitution pattern of the substituents on the imidazole ring. Thus 1,4-di- or 1,2,5-trisubstitued