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.