Process for the preparation of 2-amino-5, 8-dimethoxy (1,2,4) triazolo (1,5-c) pyrimidine
申请人:——
公开号:US20020013230A1
公开(公告)日:2002-01-31
2-Amino-5,8-dimethoxy[1,2,4]triazolo[1,5-c]-pyrimidine is prepared from a 5-chloro or 5-methoxy substituted 3-amino-8-methoxy[1,2,4]triazolo[4,3-c]-pyrimidine by reaction with methoxide in an alcohol solvent. Both rearrangement and, when the 5-substituent is chloro, methoxy substitution can be accomplished directly.
2-氨基-5,8-二甲氧基[1,2,4]三唑[1,5-c]-嘧啶是由5-氯或5-甲氧基取代的3-氨基-8-甲氧基[1,2,4]三唑[4,3-c]-嘧啶与甲氧基在醇溶剂中反应制备而成。当5-取代基是氯时,可以直接完成重排和甲氧基取代。