1-苯硫基-吡咯啉-2,5-二酮 、
2'-O-[1-(4-chlorophenyl)-4-ethoxypiperidin-4-yl]-6-O-(2,5-dichlorophenyl)-3'-O-levulinoyl-2-N-phenylacetyl-guanosine 、 2'-O-[1-(4-chlorophenyl)-4-ethoxypiperidin-4-yl]-6-O-(2,5-dichlorophenyl)-2-N-phenylacetyl-5'-O-(9-phenyl-xanthen-9-yl)guanosine 3'H-phosphonate triethylammonium salt 在
吡啶 、
三甲基乙酰氯 作用下,
反应 0.08h,
以93.5%的产率得到[(2R,3R,4R,5R)-4-[1-(4-chlorophenyl)-4-ethoxypiperidin-4-yl]oxy-2-[[[(2R,3R,4R,5R)-4-[1-(4-chlorophenyl)-4-ethoxypiperidin-4-yl]oxy-5-[6-(2,5-dichlorophenoxy)-2-[(2-phenylacetyl)amino]purin-9-yl]-2-[(9-phenylxanthen-9-yl)oxymethyl]oxolan-3-yl]oxy-phenylsulfanylphosphoryl]oxymethyl]-5-[6-(2,5-dichlorophenoxy)-2-[(2-phenylacetyl)amino]purin-9-yl]oxolan-3-yl] 4-oxopentanoate