Synthesis of 9-[2-(2-hydroxymethyl-2-methyl-, -(2-acetoxymethyl-2-methyl-, -(2,2-di(hydroxymethyl)-, and -(2,2-Di(acetoxymethyl)-1,3-dioxan-5-yl)ethyl] derivatives of guanine and 2-aminopurine
作者:Dae-Kee Kim、Namkyu Lee、Young-Woo Kim
DOI:10.1002/jhet.5570370515
日期:2000.9
Synthesis of 9-[2-(2-hydroxymethyl-2-methyl-, -(2-acetoxymethyl-2-methyl-, -(2,2-di(hydroxymethyl)-, and -(2,2-di(acetoxymethyl)-1,3-dioxan-5-yl)ethyl] derivatives of guanine and 2-aminopurine, 2–9, has been accomplished in seven to eight step sequences from readily available 1-(tert-butyldiphenylsilyloxy)-acetone, 1,3-di(tert-butyldiphenylsilyloxy)acetone, and the diol 10. Formation of cyclic ketals
9- [2-(2-羟甲基-2-甲基-,-(2-乙酰氧基甲基-2-甲基-),-(2,2-二(羟甲基)-和-(2,2-二(乙酰氧基甲基) )鸟嘌呤和2-氨基嘌呤2-9的)-1,3-二氧六环5-基)乙基]衍生物已从易于获得的1-(叔丁基二苯基甲硅烷基氧基)-丙酮1至7到8个步骤完成1,3-二(叔-butyldiphenylsilyloxy)丙酮,和二醇10环状缩酮的。形成11和12是在酸性条件下使用甲磺酸催化量用过量的无水硫酸铜(II)的甲苯硫酸盐沿成功地进行。随后甲硅烷基化,乙酰化,氢解和溴化反应提供了关键中间体19和20,其与2-氨基-6-氯嘌呤偶联以高收率产生嘌呤化合物21和22。鸟嘌呤衍生物2-5是从获得的21和22通过水解和乙酰化,而在脱氯和水解21和22,得到2-氨基嘌呤化合物6-9。