HETEROAROMATIZATION WITH KETENE DITHIOACETALS: PART II. SYNTHESIS OF SOME NOVEL 5-AMINOPYRAZOLE-3-CARBONITRILE, 3-CARBOXAMIDE AND PYRAZOLO[3,4-d]PYRIMIDIN-4-ONE DERIVATIVES AS ANTIMICROBIAL AGENTS
作者:Saber M. Hassan、Hussein A. Emam、Mahmoud M. Abdelall
DOI:10.1080/10426500108040260
日期:2001.8
Abstract Ketene dithioacetals la-d are utilized for synthesis of pyrazoledithiocarboxylates 2a-d and arylaminopyrazoles 4a,b with two different substituents (o-ethoxy and p-diethylminosulfonyl) in aryl residue. Some transformation of the dithioesters 2 ate described. After that arylaminopyraroles 4a,b are converted to pyrazolopyrimidine derivatives 8–11.