2,4-Diaminothieno[2,3-d]pyrimidine analogs of trimetrexate and piritrexim as potential inhibitors of Pneumocystis carinii and Toxoplasma gondii dihydrofolate reductase
作者:Andre Rosowsky、Clara E. Mota、Joel E. Wright、James H. Freisheim、James J. Heusner、John J. McCormack、Sherry F. Queener
DOI:10.1021/jm00073a009
日期:1993.10
undescribed 2,4-diaminothieno[2,3-d]pyrimidine analogues of the potent dihydrofolate reductase (DHFR) inhibitors trimetrexate (TMQ) and piritrexim (PTX) were synthesized as potential drugs against Pneumocystis carinii and Toxoplasma gondii, which are major causes of severe opportunistic infections in AIDS patients. 2,4-Diamino-5-methyl-6-(aryl/aralkyl)thieno[2,3-d]pyrimidines with 3,4,5-trimethoxy or 2,5-dimethoxy
合成了八种先前未描述的有效的二氢叶酸还原酶(DHFR)抑制剂曲美曲塞(TMQ)和派立曲辛(PTX)的2,4-二氨基噻吩并[2,3-d]嘧啶类似物,作为抗卡氏肺孢子虫和弓形虫的潜在药物,这是艾滋病患者严重机会性感染的主要原因。2,4-二氨基-5-甲基-6-(芳基/芳烷基)噻吩并[2,3-d]嘧啶,在芳基/芳烷基部分具有3,4,5-三甲氧基或2,5-二甲氧基取代基,和2,通过使相应的2-氨基-3-氰基噻吩与氯甲am盐酸盐反应,制得在芳基/芳烷基部分具有2,5-二甲氧基取代的4-二氨基-5-(芳基/芳烷基)噻吩并[2,3-d]嘧啶。5,6-二取代类似物中的芳基要么直接连接到杂环上,要么被一个或两个碳原子隔开,而5-单取代类似物中的芳基与杂环之间被两个或三个碳原子隔开。用于制备5,6-二取代类似物的2-氨基-3-氰基-5-甲基-6-(芳基/烷基)噻吩中间体是由ω-芳基-2-亚烷基-丙二腈和硫在存在