(S)-8-methyl-2-((R)-3-methylmorpholin-4-yl)-8-trifluoromethyl-6,7,8,9-tetrahydropyrimido[1,2-a]pyrimidin-4-one 、
5-(chloromethyl)-1-difluoromethyl-2H-pyrazole 在
caesium carbonate 作用下,
以
乙腈 为溶剂,
以140 mg的产率得到(S)-9-(2-difluoromethyl-2H-pyrazol-3-ylmethyl)-8-methyl-2-((R)-3-methylmorpholin-4-yl)-8-trifluoromethyl-6,7,8,9-tetrahydropyrimido[1,2-a]pyrimidin-4-one