1-[2-(2-hydroxy-phenyl)-2-oxo-ethyl]-3-methyl-7-(2-butyn-1-yl)-8-[3-(tert-butyloxycarbonylamino)-piperidin-1-yl]-3,7-dihydro-1H-purine-2,6-dione 、
N-Boc-溴乙胺 在
potassium carbonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以73%的产率得到1-(2-{2-[2-(tert-butyloxycarbonylamino)-ethoxy]-phenyl}-2-oxo-ethyl)-3-methyl-7-(2-butyn-1-yl)-8-[3-(tert-butyloxycarbonylamino)-piperidin-1-yl]-3,7-dihydro-1H-purine-2,6-dione