双(二异丙基氨基)(2-氰基乙氧基)膦 、
5-[(9-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-2-yl}-6-hydroxy-9H-purin-2-ylamino)-methyl]-1H-pyrimidine-2,4-dione 在
四氮唑 、 4 A molecular sieve 作用下,
以
乙腈 为溶剂,
生成 Diisopropyl-phosphoramidous acid (2R,3S,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-{2-[(2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-ylmethyl)-amino]-6-hydroxy-purin-9-yl}-tetrahydro-furan-3-yl ester 2-cyano-ethyl ester