Racemic trans-N-(2-phosphonomethoxycycloalkyl) derivatives of heterocyclic bases, a novel type of nucleotide analogs related to 9-(2-phosphonomethoxyethyl)adenine (PMEA), are reported. The synthesis of fully protected adenine- (5), hypoxanthine- (7), guanine- (11), thymine- (13), uracil- (16) and cytosine-containing (18) carbocyclic nucleotide analogs is based on the reaction of trans-2-hydroxycycloalkyl derivatives of N-protected nucleobases (2, 10, 12, 14, 17) with diisopropyl tosyloxymethanephosphonate. Deprotection of these compounds afforded the title nucleotide analogs. The starting nucleoside derivatives have been prepared via nucleophilic oxirane ring opening of cycloalkene oxides with various protected or free nucleobases.
报告了与9-(2-磷酸甲氧乙基)腺嘌呤(PMEA)相关的一种新型核苷酸类似物,即杂环碱基的外消旋trans-N-(2-磷酸甲氧基环烷基)衍生物。完全保护的腺嘌呤-(5)、次黄嘌呤-(7)、鸟嘌呤-(11)、胸腺嘧啶-(13)、尿嘧啶-(16)和胞嘧啶含有的(18)碳环核苷酸类似物的合成基于trans-2-羟基环烷基的N-保护核碱基衍生物(2、10、12、14、17)与二异丙基对甲苯磺酸酯酯基甲酸酯的反应。去保护这些化合物得到所述的核苷酸类似物。起始核苷衍生物通过不同保护或自由核碱基的环戊烯氧化物的亲核环氧烷裂解制备。