Synthesis and characterization of N2-(p-n-butylphenyl)-2'-deoxyguanosine and its 5'-triphosphate and their inhibition of HeLa DNA polymerase .alpha.
作者:George E. Wright、Lech W. Dudycz
DOI:10.1021/jm00368a012
日期:1984.2
N2-(p-n-Butylphenyl)-2'-deoxyguanosine (BuPdG) and its 5'-triphosphate (BuPdGTP), expected to be inhibitors of eukaryotic DNA polymerase alpha, have been synthesized. BuPdG was synthesized by two methods and characterized by 1H NMR and by chemical relation to guanosine. Direct synthesis involving silylated N2-(p-n-butylphenyl)guanine (BuPG) and 1-chloro-3,5-di-p-toluoyl-2-deoxyribofuranose in the presence
已经合成了N2-(pn-丁基苯基)-2'-脱氧鸟苷(BuPdG)及其5'-三磷酸(BuPdGTP),它们有望成为真核DNA聚合酶α的抑制剂。通过两种方法合成BuPdG,并通过1H NMR和与鸟嘌呤的化学关系进行表征。在三甲基甲硅烷基三氟甲磺酸酯存在下,直接合成包括甲硅烷基化的N2-(pn-丁基苯基)鸟嘌呤(BuPG)和1-氯-3,5-二-对甲苯甲酰基-2-脱氧核糖呋喃糖的方法得到了一个脱氧核糖核苷的α和两个β异构体通过1 H NMR。但是,NMR和UV光谱在区分7个和9个异构体方面是模棱两可的。所需的9-β-BuPdG的身份最终由其从相应的核糖核苷的独立合成中证实。O'的1 H NMR谱 BuPG的乙酰化核糖核苷表现出O'乙酰化鸟苷的特征性模式,并且通过将O'乙酰化的2-溴代肌苷异构体与pn丁基苯胺和氨反应的产物联系起来,证明了它们的同一性:2-溴代肌苷鸟苷还产生了可疑的9-β-核糖核苷B
Improved procedure for the regiospecific synthesis of 2′-deoxyribonucleosides
作者:M.V. Baud、C. Chavis、M. Lucas、J.-L. Imbach
DOI:10.1016/s0040-4039(00)97641-x
日期:1990.1
2′-Deoxyribonucleosides are regiospecifically synthesized in high yields by catalyzing with KI-dibenzo-18-crown-6 PTC the condensation between unprotected silylated purines and pyrimidines and the appropriate easily available 2-deoxyribofuranosyl or pyranosyl sugar derivatives.
It was shown that in contrast to guanosine, its 7-regioisomer, 7-(β-D-ribofuranosyl)guanine, when subjected to reaction with methyl iodide in DMF containing sodium hydride, promoted the preferential formation of 3-substituted product, whereas 1-methylated product was the minor one. This finding opened the possibility of preparing 3-methylguanine in the 7-step synthetic route from guanine. Treated with