A new entry to the imidazo[4,5-<i>d</i>]pyrimidine system. The reaction of 1,3-dimethyl-6-aminouracil with<i>N,N</i>-dimethyldichloromethyleniminium chloride (phosgeniminium chloride) and trimethylsilyl azide, a novel and convenient “one pot” synthesis of 8-<i>N</i>-arylaminotheophyllines (2-<i>N</i>-arylamino-4,6-dimethylimidazo[4,5-<i>d</i>]pyrimidine-(4H,6H)-5,7-diones), starting from 1,3-dimethyl-6-aminouracil
作者:Bruno Kokel
DOI:10.1002/jhet.5570310515
日期:1994.9
5-d]pyrimidine-(4H,6H)-5,7-diones) 17 through reaction successively, with phosgeniminium chloride (N,N-dimethyldichloromethyleniminium chloride) (1a), trimethylsilyl azide (4) and arylamines. Starting with the synthesis of the N,N-dimethyl(1,3-dimethyl-4-aminouracil-5-yl)chloromethyleniminium chloride (amide chloride) 3 this new route to the imidazo[4,5-d]pyrimidine skeleton was shown to proceed via the
1,3-二甲基-6-氨基尿嘧啶2转化为各种8- N-芳基氨基茶碱(2- N-芳基氨基-4,6-二甲基咪唑并[4,5- d ]嘧啶-(4 H,6 H)-5,通过与光气氯化亚氨基氯化铵(N,N-二甲基二氯甲基亚甲基氯化铵)(1a),叠氮化三甲基甲硅烷基(4)和芳基胺相继反应而形成7-二酮)17。从合成N,N-二甲基(1,3-二甲基-4-氨基尿嘧啶-5-基)氯甲基亚氯化铵(酰胺氯化物)3开始,这是一条新的制备咪唑并[4,5- d已显示]嘧啶骨架是通过形成非常不稳定的N,N-二甲基-(1,3-二甲基-4-氨基尿嘧啶-5-基)叠氮基甲基氯化亚铵(酰胺叠氮化物)(8)形成的,该反应会原位进行重排成4-氨基-5-(氯甲酰胺-1'-基)尿嘧啶和/或类型10的相关化合物的可能性很大。根据反应条件,证明后者也是8-二甲基氨基茶碱11的非常好的前体。