1-(2-deoxy-β-D-erythro-pentofuranosyl)-5-tert-butyldiphenylsilyloxymethyl-1H,3H-pyrimidine-2,4-dione 、
4,4'-双甲氧基三苯甲基氯 在
吡啶 作用下,
以80%的产率得到1-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-erythro-pentofuranosyl]-5-tert-butyldiphenylsilyloxymethyl-1H,3H-pyrimidine-2,4-dione