Diisopropyl-phosphoramidous acid (2R,3R,4R,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-methoxy-5-(6-{[(4-methoxy-phenyl)-diphenyl-methyl]-amino}-purin-9-yl)-tetrahydro-furan-3-yl ester 2-cyano-ethyl ester 、 [(2R,3R,4R,5R)-2-[[[(2R,3R,4R,5R)-5-(3-benzoyl-2,4-dioxopyrimidin-1-yl)-2-(hydroxymethyl)-4-methoxyoxolan-3-yl]oxy-(2-cyanoethoxy)phosphoryl]oxymethyl]-4-benzoyloxy-5-[6-(dibenzoylamino)purin-9-yl]oxolan-3-yl] benzoate 在
四氮唑 作用下,
以
乙腈 为溶剂,
反应 1.0h,
以86%的产率得到[(2R,3R,4R,5R)-2-[[[(2R,3R,4R,5R)-5-(3-benzoyl-2,4-dioxopyrimidin-1-yl)-2-[[[(2R,3R,4R,5R)-2-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-4-methoxy-5-[6-[[(4-methoxyphenyl)-diphenylmethyl]amino]purin-9-yl]oxolan-3-yl]oxy-(2-cyanoethoxy)phosphoryl]oxymethyl]-4-methoxyoxolan-3-yl]oxy-(2-cyanoethoxy)phosphoryl]oxymethyl]-4-benzoyloxy-5-[6-(dibenzoylamino)purin-9-yl]oxolan-3-yl] benzoate