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 azodicarbonyl compounds 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
某些1,2,4-三取代的咪唑在5位上经历了偶氮二羰基化合物的亲电子攻击,以形成5-(1,2-二烷氧基羰基)肼基-和5-(4-苯基-3,5-二氧代-1,2 ,4-三唑烷-1-基)咪唑衍生物的产率中等至高。该反应高度易受咪唑环上取代基的性质和取代方式的影响。因此,1,4-二-或1,2,5-三取代的咪唑和2-甲基亚磺酰亚胺基咪唑没有反应。取决于反应温度,用锌粉尘酸还原四取代的咪唑得到1-或1,2-裂解的产物,但是肼基保持完整。