Synthesis and Biological Activities of Tricyclic Conformationally Restricted Tetrahydropyrido Annulated Furo[2,3-<i>d</i>]pyrimidines as Inhibitors of Dihydrofolate Reductases
作者:Aleem Gangjee、Elfatih Elzein、Sherry F. Queener、John J. McGuire
DOI:10.1021/jm9705420
日期:1998.4.1
The synthesis of seven 2,4-diamino-5,6,7,8-tetrahydro-7-substituted pyrido[4',3':4,5]furo[2,3-d]pyrimidines 1-6 are reported as nonclassical antifolate inhibitors of dihydrofolate reductase (DHFR) and compound 7 as a classical antifolate inhibitor of tumor cells in culture. The compounds were designed as conformationally restricted analogues of trimetrexate. The synthesis was accomplished from the
据报道,有七个2,4-二氨基-5,6,7,8-四氢-7-取代的吡啶并[4',3':4,5]呋喃[2,3-d]嘧啶1-6的合成。二氢叶酸还原酶(DHFR)和化合物7的非经典抗叶酸抑制剂,是培养中肿瘤细胞的经典抗叶酸抑制剂。该化合物被设计为曲美曲酯的构象受限的类似物。合成是通过3-溴-4-哌啶酮与2,4-二氨基-6-羟基嘧啶的环缩合反应完成的,从而提供区域特异性的2,4-二氨基-5,6,7,8-四氢吡啶基[4',3': 4,5]呋喃[2,3-d]嘧啶-7-氢溴酸盐(16)。然后将其用适当的苄基卤化物烷基化,得到目标化合物1-6。经典的抗叶酸剂7使用4-(氯甲基)苯甲酰基-1-谷氨酸二乙酯(17)代替苄基卤进行烷基化,然后皂化得到7。化合物1-6对卡氏肺孢子虫,弓形虫,鸟分枝杆菌和大鼠肝脏的DHFR具有中等抑制作用。经典的类似物7对鸟分枝杆菌DHFR的效力比对大鼠肝脏DHFR的效力高88倍。经典