Pyridazine Derivatives and Related Compounds. Part 11: <sup>1</sup>Synthesis of Some Pyrimido[4′,5′:4,5]thieno[2,3-<i>c</i>]pyridazines
作者:Ali Deeb、Mahmoud Kotb、Mohamed El-Abbasy
DOI:10.1080/10426500490475175
日期:2004.11.1
3-c]pyridazine-4-ones were synthesized starting from ethyl 5-aminothieno[2,3-c] pyridazine-6-carboxylate 1. Reaction of amino ester 1with phenyl isothiocyanate affords thiourea derivative 10which undergo further transformation to the related fused heterocyclic systems.
3-取代嘧啶并[4',5':4,5]噻吩并[2,3-c]哒嗪-2,4-二酮和3-氨基-2-甲基嘧啶[4',5':4,5 ]噻吩并[2,3-c]哒嗪-4-酮由5-氨基噻吩并[2,3-c]哒嗪-6-羧酸乙酯1开始合成。氨基酯1与异硫氰酸苯酯反应得到硫脲衍生物10,该衍生物经过进一步转化到相关的稠合杂环系统。