followed by hydrogenation (H2/Pd-C) and acidolysis, yielded the corresponding 4-(arylmethyl)cyclohexanones, which were then condensed with cyanoguanidine to form the tetrahydroquinazolines. Three simple 2, 4-diamino-6-alkyl-5,6,7,8-tetrahydroquinazoline model compounds (9a-c) were also prepared in one step from commercially available 4-alkylcyclohexanones by this method. Enzyme inhibition assays against
合成了19种先前未描述的2,4-二
氨基-6-(芳基甲基)-5,6,7,8-四氢
喹唑啉(5a-m,10-12)作为更大努力的一部分,以评估亲脂性二氢叶酸还原酶的治疗潜力(DHFR)
抑制剂,可防止艾滋病的机会性感染。将适当取代的(芳基甲基)
三苯基膦与4,4-亚乙基二氧
环己酮缩合,然后加氢(H2 / Pd-C)和酸解反应,得到相应的4-(芳基甲基)
环己酮,然后将其与
氰基
胍缩合形成四氢
喹唑啉。还通过一步法从市售的4-烷基
环己酮一步制备了三种简单的2,4-二
氨基-6-烷基-5,6,7,8-四氢
喹唑啉模型化合物(9a-c)。针对大鼠肝脏DHFR,卡氏肺孢子虫DHFR,进行了弓形虫双功能DHFR-
TS酶的比较,比较了IC50(rat)/ IC50(P。carinii)和IC50(rat)/ IC50(T。gondii)的选择性比。Carinii DHFR的三种最有效
抑制剂是2,5-二甲氧基苄基(5j),3,4-二甲氧基苄基(5k)和3