3-bromo-2-ethyl-4H-pyrido[1,2-a]pyrimidin-4-one hydrobromide 、
3-bromo-2-butyl-4H-pyrido[1,2-a]pyrimidin-4-one 、
4-氯苯硼酸 、
4-甲氧基苯硼酸 以3-(4-chlorophenyl)-2-ethyl-4H-pyrido[1,2-a]pyrimidin-4-one (3.10 g, 55%) was obtained as a colourless solid的产率得到3-(4-chlorophenyl)-2-ethyl-4H-pyrido[1,2-a]pyrimidin-4-one