Phosphoric acid (2R,3R,4R,5R)-4-(tert-butyl-dimethyl-silanyloxy)-5-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-2-(6-oxo-1,6-dihydro-purin-9-yl)-tetrahydro-furan-3-yl ester 2-(4-nitro-phenyl)-ethyl ester; compound with triethyl-amine 、
2'-O-(tert-butyl)dimethylsilylinosinyl-<2'-P-(2-(p-nitrophenyl)ethyl)><*>5'>-2,3'-bis-O-(tert-butyl)dimethylsilylinosine 在
喹啉-8-磺酰氯 、
3-硝基-1,2,4-三氮唑 作用下,
以
吡啶 为溶剂,
以88%的产率得到[(2R,3R,4R,5R)-4-[[(2R,3R,4R,5R)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-(6-oxo-3H-purin-9-yl)oxolan-2-yl]methoxy-[2-(4-nitrophenyl)ethoxy]phosphoryl]oxy-3-[tert-butyl(dimethyl)silyl]oxy-5-(6-oxo-3H-purin-9-yl)oxolan-2-yl]methyl [(2R,3R,4R,5R)-4-[tert-butyl(dimethyl)silyl]oxy-5-[[(4-methoxyphenyl)-diphenylmethoxy]methyl]-2-(6-oxo-3H-purin-9-yl)oxolan-3-yl] 2-(4-nitrophenyl)ethyl phosphate