A Convenient Synthesis for Some New Pyrido[4′,3′:4,5]thieno[2,3-d]pyrimidines and Related Fused 1,2,4-Triazolo and 1,3,4-Thiadiazolo-derivatives
作者:Essam Kh. Ahmed
DOI:10.1080/10426500211720
日期:2002.5.1
useful starting matrial for the constructions of heterocyclic systems. It was utilized to synthesize derivatives of the novel heterocyclic systems pyrido[4',3':4,5]thieno[2,3-d]pyrimidine 4 , 10 , pyrido[4',3':4,5]thieno[2,3-d]-[1,2,4]triazolo[1,5-a]pyrimidine 7 , 11a-e and pyrido[4',3':4,5]thieno[2,3-d][1,3,4]thiadiazolo[3,2-a]pyrimidine 12-14 .
二乙基 2-isothiocyanato-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3,6 dicarboxylate 1 是一种方便且有用的起始材料,用于构建杂环系统。它被用来合成新型杂环系统吡啶并[4',3':4,5]噻吩并[2,3-d]嘧啶4、10、吡啶并[4',3':4,5]噻吩并[2,3-d]嘧啶的衍生物2,3-d]-[1,2,4]三唑并[1,5-a]嘧啶7、11a-e和吡啶并[4',3':4,5]噻吩并[2,3-d][ 1,3,4]噻二唑并[3,2-a]嘧啶 12-14 。