Diphenyl-carbamic acid 9-[(2R,4S,5R)-5-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-(hydroxy-phenylsulfanyl-phosphoryloxy)-tetrahydro-furan-2-yl]-2-propionylamino-9H-purin-6-yl ester; compound with triethyl-amine   、                                                                                      
[9-[(2R,4S,5R)-4-bis(phenylsulfanyl)phosphoryloxy-5-(hydroxymethyl)oxolan-2-yl]-2-(propanoylamino)purin-6-yl] N,N-diphenylcarbamate                                                                                                                                                              在
                                                                                                                                                                                 
2,4-二磺酰氯基均三甲苯   、                                                                                                  
3-硝基-1,2,4-三氮唑                                                                                                                                  作用下,
                                                                                                                                                                                        反应 0.33h,
                                                                                                                以95%的产率得到[9-[(2R,4S,5R)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-4-[[(2R,3S,5R)-3-bis(phenylsulfanyl)phosphoryloxy-5-[6-(diphenylcarbamoyloxy)-2-(propanoylamino)purin-9-yl]oxolan-2-yl]methoxy-phenylsulfanylphosphoryl]oxyoxolan-2-yl]-2-(propanoylamino)purin-6-yl] N,N-diphenylcarbamate