Synthesis and antifolate activity of 5-methyl-5,10-dideaza analogs of aminopterin and folic acid and an alternative synthesis of 5,10-dideazatetrahydrofolic acid, a potent inhibitor of glycinamide ribonucleotide formyltransferase
作者:J. R. Piper、G. S. McCaleb、J. A. Montgomery、R. L. Kisliuk、Y. Gaumont、J. Thorndike、F. M. Sirotnak
DOI:10.1021/jm00119a018
日期:1988.11
5-methyl analogue 11b. Biological evaluation of 6, 7, 11a, and 11b for inhibition of dihydrofolate reductase (DHFR) isolated from L1210 cells and for growth inhibition and transport characteristics toward L1210 cells revealed 6 to be less potent than methotrexate in the inhibition of DHFR and cell growth. Compounds 6, 11a, and 11b were transported into cells more efficiently than methotrexate. Growth
在先前用于制备经典抗叶酸剂的5-烷基-5-脱氮类似物的通用合成方法的扩展中,制备了标题化合物。2,4-二氨基吡啶[2,3-d]嘧啶-6-甲醛(2a)及其5-甲基类似物2b与[4-(甲氧基羰基)亚苄基]三苯基膦的维蒂希缩合反应得到9,10-乙烯基前体3a和3b 。3b的9,10-乙烯基的氢化(DMF,室温,5%Pd / C),然后进行酯水解,得到4- [2-(2,4-二氨基-5-甲基吡啶基[2,3-d]嘧啶-6-基)乙基]苯甲酸(5),然后通过与L-谷氨酸二甲酯偶合(使用i-BuOCOCl的混合酸酐法)转化为5-甲基-5,10-二叠氮杂氨基蝶呤(6)通过酯水解。对6进行标准的水解脱氨基反应,得到5-甲基-5,10-二叠氮基叶酸(7)。通过伴随的脱氨基和酯水解将中间体3a和3b转化为8a和8b。8a,b(使用(EtO)2 POCN)与L-谷氨酸的二酯的肽偶联得到中间体酯9a和9b。氢化9a和9b的9