2-(1-Benzyl-1H-pyrazol-4-yl)-9-[(2R,3R,4R,5R)-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-9H-purin-6-ylamine 、 4-Iodo-pentylpyrazole 、 4-Iodo-benzylpyrazole 在
9-{(2R,3R,4R,5R)-3,4-bis(1,1,2,2-tetramethyl-1silapropoxy)-5-[(1,1,2,2-tetramethyl-1-silapropoxy)methyl]oxolan-2-yl}-2-[1-pentylpyrazol-4-yl]purine-6ylamine 作用下,
以to afford compound 14的产率得到9-{(2R,3R,4R,5R)-3,4-bis(1,1,2,2-tetramethyl-1silapropoxy)-5-[(1,1,2,2-tetramethyl-1-silapropoxy)methyl]oxolan-2-yl}-2-[1-pentylpyrazol-4-yl]purine-6ylamine