GRAPHICAL ABSTRACT ABSTRACT 2-Substituted-4-methyl-5,13-dihydropyrimido[4′,5′:5,6][1,4]thiazepino[2,3-b]quinoxalines (7a-g), derivatives of a new heterocyclic system were synthesized through cyclocondensation of 2,4-dichloro-5-(chloromethyl)-6-methylpyrimidine (3) with 3-aminoquinoxaline-2-thiol (4) and subsequent substitution by various secondary amines. Regioselective heterocyclization was confirmed
图形摘要 摘要 2-Substituted-4-methyl-5,13-dihydropyrimido[4',5':5,6][1,4]thiazepino[2,3-b]quinoxalines (7a-g),a 的衍
生物通过 2,4-二
氯-5-(
氯甲基)-6-
甲基嘧啶 (3) 与 3-
氨基
喹喔啉-2-
硫醇 (4) 的环缩合反应,并随后被各种仲胺取代,合成了新的杂环体系。4-methyl-2-(pyrrolidin-1-yl)-5,13-dihydropyrimido[4',5':5,6] [1,4]thiazepino[2, 3-b]
喹喔啉 (7a)。