Inhibitors of Bacillus subtilis DNA polymerase III. Influence of modifications in the pyrimidine ring of anilino- and (benzylamino)pyrimidines
作者:Debra J. Trantolo、George E. Wright、Neal C. Brown
DOI:10.1021/jm00155a016
日期:1986.5
examined in several series of N6-substituted 6-aminopyrimidines. The presence of alkyl groups as large as n-butyl in the 3-position of 6-(5-indanylamino)uracil had no effect on inhibitor-enzyme binding. Substituents in the 4-position of a series of 2-amino-6-(benzylamino)pyrimidines had complex effects: alkoxy and phenoxy derivatives were less active than the parent 4-oxo (isocytosine) compound, but alkylphenoxy
在几个N6-取代的6-氨基嘧啶系列中,研究了对抑制枯草芽孢杆菌DNA聚合酶III的替代作用。在6-(5-茚满基氨基)尿嘧啶的3-位上存在与正丁基一样大的烷基对抑制剂-酶结合没有影响。一系列2-氨基-6-(苄氨基)嘧啶的4-位取代基具有复杂的作用:烷氧基和苯氧基衍生物的活性低于母体4-氧代(异胞嘧啶)化合物,而烷基苯氧基和卤代苯氧基衍生物的活性更高与4-苯氧基化合物本身相比,这表明在4-取代基和酶表面之间可以发生疏水结合,并且嘧啶环和pol III之间的空间可能代表了酶的活性位点。用甲基和乙基取代5-H大大降低了6-(苄氨基)-和6-对甲苯基尿嘧啶的抑制活性,但5-溴和5-碘类似物与母体化合物等价。这些结果表明,这些化合物的苯环必须以与嘧啶环平面垂直的构象存在,并且这种“活性构象”的电荷转移稳定性可能会补偿抑制剂中5个卤代基的空间位阻,酶复合物。