Antimicrobial and antitumor activity of n-heteroimmine-1,2,3-dithiazoles and their transformation in triazolo-, imidazo-, and pyrazolopirimidines
作者:Pier Giovanni Baraldi、Maria Giovanna Pavani、Maria del Carmen Nuñez、Patrizia Brigidi、Beatrice Vitali、Roberto Gambari、Romeo Romagnoli
DOI:10.1016/s0968-0896(01)00294-2
日期:2002.2
sodium methoxide in refluxing methanol. This provides a general and attractive route to 4-methoxy-6-cyano pyrazolo[3,4-d]pyrimidines from 1-substituted 5-amino pyrazoles 10-19 in two simple steps. Finally, the isosteric replacement of the pyrazole ring atoms to give the imidazole[3,4-d]pyrimidine and triazole [4,5-d] pyrimidine ring systems was examined.
Appel盐与邻氨基腈杂环10-19的反应得到相应的4-氯-5-杂亚胺-1,2,3-二噻唑20-29,对其抗菌,抗真菌和抗肿瘤活性进行了评估。尽管所有这些N-杂亚胺都没有显着的抗菌活性,但它们显示出显着的抗真菌活性。而且,相同的衍生物代表了杂环合成中的通用中间体,实际上,吡唑亚氨基二噻唑20-26可以一步转化为相应的4-甲氧基-吡唑并[3,4-d]嘧啶30-的2-氰基衍生物。 35由甲醇钠在甲醇中回流。这提供了通过两个简单的步骤从1-取代的5-氨基吡唑10-19生成4-甲氧基-6-氰基吡唑并[3,4-d]嘧啶的一般且有吸引力的途径。最后,