作者:Martin Dunkel、P. Dan Cook、Oscar L. Acevedo
DOI:10.1002/jhet.5570300540
日期:1993.10
A series of 2-(2-oxoalkylidene)-4(1H)-pyrimidinone nucleoside analogs were synthesized by the addition of the lithium enolates of methylketones to 2,5′- and 2,2′-anhydrouridines and to 2,5′-anhydrothymidines. Alternatively, 2-thiouridine was alkylated with bromomethyl ketones to yield 2-(2-oxoalkyl)thio-4(1H)-pyrimidinone ribofuranosides in good yields. These intermediates were subsequently transformed
通过向2,5'-和2,2'-脱水尿苷中添加甲基酮的烯醇锂,合成了一系列2-(2-氧代亚烷基)-4(1 H)-嘧啶酮核苷类似物。 -脱水胸苷。或者,将2-硫代尿苷与溴甲基酮烷基化,以良好的产率得到2-(2-氧代烷基)硫基-4(1H)-嘧啶酮呋喃糖苷。这些中间体随后通过Eschenmoser硫磺挤出反应转化为标题化合物。2-(2-氧代亚烷基)-4-(1 H)-嘧啶酮核苷类似物在其1中显示烯醇质子信号H nmr光谱表明N-3与酮氧之间存在氢键。这些结构提供了具有沃森-克里克氢键潜力的官能团。