3-Bromo-7-(1-methyl-1-triethylsilanyloxyethyl)imidazo[1,2-alpha]pyrimidine 、
4-chloro-2-(1,1-difluoroethyl)pyrimidine 在
silica 作用下,
以gave 3-[2-(1,1-difluoroethyl)pyrimidin-4-yl]-7-(1-methyl-1-triethylsilanyloxyethyl)imidazo[1,2-α]pyrimidine的产率得到3-[2-(1,1-Difluoroethyl)pyrimidin-4-yl]-7-(1-methyl-1-triethylsilanyloxyethyl)imidazo[1,2-alpha]pyrimidine