ethyl 5-methoxy-1H-1,2,3-triazole-4-carboxylate 、
碘甲烷 以to give 5-methoxy-1-methyl-1H-[1,2,3]triazole-4-carboxylic acid ethyl ester (isomer A) and 5-methoxy-2-methyl-2H-[1,2,3]triazole-4-carboxylic acid ethyl ester (isomer B)的产率得到1-Methyl-4-aethoxycarbonyl-5-methoxy-1,2,3-triazol