A new selective preparation of ethyl 7-aminopteridine-6- carboxylate derivatives and related compound
作者:Yoichi Yamada、Heinosuke Yasuda、Yuichi Yoshihara、Kazue Yoshizawa
DOI:10.1002/jhet.5570360534
日期:1999.9
A series of ethyl 7-amino-2,4-dioxopteridine-6-carboxylates 4 and ethyl 7-amino-4-oxo-2-thioxopteridine-6-carboxylates 5, of interest biologically, has been prepared in one step from the reaction of such vicinal-diamines as 1,3-dialkyl-5,6-diaminouracils 2 or 1,3-dialkyl-5,6-diamino-2-thiouracils 3 with diethyl (E)-2,3-dicyanobutenedioate (1). Moreover, ethyl 3-amino[1,2,4]triazino[2,3-a]-1H-benzi
在反应的一个步骤中,已制备出一系列生物学上有意义的一系列7-氨基-2,4-二氧蝶啶-6-羧酸乙酯4和7-氨基-4-氧代-2-硫代蝶啶-6-羧酸乙酯5诸如1,3-二烷基-5,6-二氨基尿嘧啶2或1,3-二烷基-5,6-二氨基-2-硫尿嘧啶3之类的邻位二胺与(E)-2,3-二氰基丁二酸二乙酯(1)。另外,通过1,2-二氨基-1H-苯并咪唑的反应,也得到了3-氨基[1,2,4]三嗪基[2,3- a ] -1H-苯并咪唑-2-羧酸乙酯(11)。(10)和1。通过nmr实验对所制备的4、5和11的结构进行了详细研究。