4,4'-双甲氧基三苯甲基氯 、 S
6-cyanoethyl-N
2-trifluoroacetyl-2'-deoxy-6-thioguanoside 在
吡啶 作用下,
以76%的产率得到N-[9-{(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-hydroxy-tetrahydro-furan-2-yl}-6-(2-cyano-ethylsulfanyl)-9H-purin-2-yl]-2,2,2-trifluoro-acetamide