Condensation of 2-substituted triethyl esters of 2-carboxy-1,7-heptanedioic acids XIV - XIX with urea afforded 5-substituted 5-(4-carboxybutyl)barbituric acids I - VI. Similarly, thiourea and the triethyl esters XIV and/or XVI gave the analogous 5-substituted 5-(4-carboxybutyl)-2-thiobarbituric acids, VII and VIII respectively. Condensation of guanidine with triethyl esters XIX - XXI produced 5-substituted derivatives of 5-(4-carboxybutyl)-2-amino-1,4,5,6-tetrahydro-4,6-dioxopyrimidine, IX -XI. Reactions of the acids II and IV with glycine ethyl ester, using the method of mixed anhydrides, gave rise to ethoxycarbonylmethylamides, XII and XIII respectively. Some of the compounds prepared exhibited enhancing effects on 5-fluorouracil in curing leukemic mice, and antineoplastic activity, manifesting itself by reducing the size of transplanted tumours in experimental animals.
2-取代的2-羧基-1,7-
庚二酸三乙酯 XIV - XIX 与
尿素反应生成5-取代的5-(4-羧丁基)戊二酰
脲 I - VI。类似地,
硫脲和
三乙酯 XIV 和/或
XVI 反应产生相应的5-取代的5-(4-羧丁基)-2-
硫代戊二酰
脲,分别为
VII 和
VIII。
脲与
三乙酯 XIX - XXI 反应生成5-取代的5-(4-羧丁基)-2-
氨基-1,4,5,6-四
氢-4,6-二
氧基
嘧啶衍
生物,
IX -XI。酸
II 和
IV 与甘
氨酸
乙酯反应,使用混合酰化物法,得到乙
氧羰基
甲基酰胺,
XII 和
XIII。一些合成的化合物对5-
氟尿
嘧啶在治疗白血病小鼠中具有增效作用,并表现出抗肿瘤活性,通过减小实验动物移植瘤的大小来体现。