Design, Synthesis, and X-ray Crystal Structure of Classical and Nonclassical 2-Amino-4-oxo-5-substituted-6-ethylthieno[2,3-<i>d</i>]pyrimidines as Dual Thymidylate Synthase and Dihydrofolate Reductase Inhibitors and as Potential Antitumor Agents
作者:Aleem Gangjee、Wei Li、Roy L. Kisliuk、Vivian Cody、Jim Pace、Jennifer Piraino、Jennifer Makin
DOI:10.1021/jm900490a
日期:2009.8.13
N-4-[(2-Amino-6-ethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-5-yl)thio]benzoyl}-l-glutamic acid 2 and 13 nonclassical analogues 2a−2m were synthesized as potential dual thymidylate synthase (TS) and dihydrofolate reductase (DHFR) inhibitors and as antitumor agents. The key intermediate in the synthesis was 2-amino-6-ethyl-5-iodothieno[2,3-d]pyrimidin-4(3H)-one, 7, to which various arylthiols were
N -4-[(2-Amino-6-ethyl-4-oxo-3,4-dihydrothieno[2,3 - d ]pyrimidin-5-yl)thio]benzoyl} -l-谷氨酸2和 13 非经典类似物2a - 2m被合成为潜在的双胸苷酸合酶 (TS) 和二氢叶酸还原酶 (DHFR) 抑制剂和抗肿瘤剂。合成中的关键中间体是 2-amino-6-ethyl-5-iodothieno[2,3- d ]pyrimidin-4(3 H )-one, 7,在其 5 位连接了各种芳基硫醇。耦合8与升谷氨酸二乙酯和皂化,得到2。X射线晶体结构2和1(的6-甲基类似物2),DHFR,及NADPH显示出对第一次,噻吩并[2,3- d处于“叶酸”模式]嘧啶环结合。化合物2是一种出色的人 TS (IC 50 = 54 nM) 和人 DHFR (IC 50 = 19 nM)双重抑制剂,并提供了针对培养中肿瘤细胞的纳摩尔