The syntheses and properties of tricyclic pyrrolo[2,3-d]pyrimidine analogues of S6-methylthioguanine and O6-methylguanine
作者:Ana R. Hornillo-Araujo、Adam J. M. Burrell、Miren K. Aiertza、Takayuki Shibata、David M. Hammond、Dolor?s Edmont、Harry Adams、Geoffrey P. Margison、David M. Williams
DOI:10.1039/b516447h
日期:——
The syntheses of novel tricyclic pyrrolo[2,3-d]pyrimidine analogues of S6-methylthioguanine are described. The crystal structures and pKa values of these and related O6-methylguanine analogues are reported. All compounds display higher pKa values than O6-methylguanine with the sulfur-containing analogues being the more basic and exhibiting higher stability in aqueous solution. In a standard substrate
描述了S6-甲基硫代鸟嘌呤的新型三环吡咯并[2,3-d]嘧啶类似物的合成。报道了这些和相关的O6-甲基鸟嘌呤类似物的晶体结构和pKa值。所有化合物均显示出比O6-甲基鸟嘌呤更高的pKa值,其中含硫类似物的碱性更高,在水溶液中显示出更高的稳定性。在使用人类修复蛋白O6-甲基鸟嘌呤-DNA甲基转移酶(MGMT)进行的标准底物测定中,仅含氧的类似物显示出活性。