Effect of C9-Methyl Substitution and C8-C9 Conformational Restriction on Antifolate and Antitumor Activity of Classical 5-Substituted 2,4-Diaminofuro[2,3-<i>d</i>]pyrimidines
作者:Aleem Gangjee、Yibin Zeng、John J. McGuire、Roy L. Kisliuk
DOI:10.1021/jm000130i
日期:2000.8.1
and its C8-C9 conformationally restricted E- and Z-isomers (6 and 7) were designed and synthesized in order to investigate the effect of incorporating a methyl group at the C9 position and of conformational restriction at the C8-C9 bridge of N-[4-[2-(2,4-diaminofuro[2, 3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic acid (1) with respect to dihydrofolate reductase (DHFR) inhibitory activity as well as antitumor
N- [4- [1-甲基-2-(2,4-二氨基呋喃[2,3-d]嘧啶-5-基)乙基]苯甲酰基] -L-谷氨酸(5)及其C8-C9构象受限设计和合成了E和Z异构体(6和7),以研究在N- [4- [2-(-)的C9位置掺入甲基和在C8-C9桥处构象限制的作用。 2,4-二氨基呋喃[2,3-d]嘧啶-5-基)乙基]苯甲酰基] -L-谷氨酸(1)对二氢叶酸还原酶(DHFR)的抑制活性和抗肿瘤活性。通过2,4-二氨基-5-(氯甲基)呋喃[2,3-d]嘧啶与4-乙酰基苯甲酸乙酯的Wittig反应,然后通过催化还原,水解和标准肽与L-谷氨酸二乙酯偶联,合成化合物。生物学结果表明,向C8-C9桥添加一个9-甲基,如5 增强的重组人(rh)DHFR抑制能力(IC(50)= 0.42 microM)以及对抗培养物中肿瘤细胞生长抑制的能力(CCRF-CEM EC(50)= 29 nM,A253 EC(50)=与9-去甲基类似物1相比为28