5-{[6-Hydroxy-9-((2R,4S,5R)-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-9H-purin-2-ylamino]-methyl}-1H-pyrimidine-2,4-dione 在
四氮唑 、
4-二甲氨基吡啶 、 4 A molecular sieve 、
三乙胺 作用下,
以
二氯甲烷 、
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