作者:Essam Kh. Ahmed
DOI:10.1002/hc.10030
日期:——
synthesized by the reaction of 2 with 1,2-diaminoethane and aminoethanethiol, respectively. The hydrazino derivative 4 underwent cyclization reactions with orthoesters and nitrous acid to give the corresponding pyrido[4′,3′:4,5]thieno[2,3-d][1,2,4]triazolo[1,5-a]pyrimidines 5, 6 and pyrido[4′,3′:4,5]thieno[3,2-e][1,2,3,4]tetrazolo[1,5-a]pyrimidine 8, respectively. Moreover, reactions of 3 with cyanogen
2-[(乙氧基硫代甲基)氨基]-4,5,6,7-四氢噻吩并[2,3-c]-吡啶-3,6-二羧酸二乙酯2,由2-异硫氰酸根合-4,5,6,7二乙酯制备-四氢噻吩并[2,3-c]吡啶-3,6-二羧酸酯1通过在无水乙醇中煮沸,转化为吡啶并[4',3':4,5]噻吩并[2,3-d]嘧啶衍生物3, 4 用水合肼处理。四环系统咪唑并[1,2-a]吡啶并[4',3':4,5]噻吩并[2,3-d]嘧啶9和吡啶并[4',3':4,5]噻吩并[2] ,3-d][1,3] 噻唑并-[3,2-a] 嘧啶 10 分别通过 2 与 1,2-二氨基乙烷和氨基乙硫醇的反应合成。肼基衍生物4与原酸酯和亚硝酸发生环化反应,得到相应的吡啶并[4',3':4,5]噻吩并[2,3-d][1,2,4]三唑并[1,5-a] ]嘧啶 5, 6 和吡啶并[4',3':4,5]噻吩并[3,2-e][1,2,3,4]四唑并[1,5-a]嘧