1-[2-deoxy-3,5-di-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-3,3-difluoropyridine-2,4(1H,3H)-dione 、
乙氧甲酰基亚甲基三苯基膦 以
二氯甲烷 为溶剂,
反应 3.5h,
以92%的产率得到1-[2-deoxy-3,5-di-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-4-[(ethoxycarbonyl)methylene]-3,3-difluoro-3,4-dihydropyridin-2(1H)-one