(dibromomethylene)triphenylphosphorane 、
1-[5-(tert-butyldiphenylsilyl)-2,3-dideoxy-3-C-(formyl)-β-D-erythro-pentofuranosyl]thymine 以
二氯甲烷 为溶剂,
反应 12.0h,
以74%的产率得到1-[(2R,4R,5S)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-4-(2,2-dibromo-vinyl)-tetrahydro-furan-2-yl]-5-methyl-1H-pyrimidine-2,4-dione