Abstract 2,4-Diamino-1-thia-3-azabutadienes 1 were studied. Methylation occured at sulfur and acylation at nitrogen bound to the 2 position. Alkylation by α-bromoketones gave rise to 2-amino-5-acylthiazoles. Upon treatment with acrylic dienophiles compounds 1 reacted either as diazadiene or as thiazadiene yielding tetrahydropyrimidinethiones or 6H-1,3-thiazines respectively.
摘要 研究了
2,4-Diamino-1-thia-3-azabutadienes 1。甲基化发生在
硫和酰化结合在 2 位的氮上。α-
溴酮的烷基化产生 2-amino-5-acylthiazoles。在用
丙烯酸亲二烯体处理后,化合物 1 作为二氮杂二烯或作为噻氮二烯反应,分别产生四氢
嘧啶硫酮或 6H-
1,3-噻嗪。