7-Methyl-2,4-dioxo-1,5-diphenyl-1,2,3,4,5,8-hexahydro-pyrido[2,3-d]pyrimidine-6-carboxylic acid 、
4,4'-二氟苯甲哌嗪 在
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
以52.64%的产率得到6-{4-[bis-(4-fluoro-phenyl)-methyl]-piperazine-1-carbonyl}-7-methyl-1,5-diphenyl-5,8-dihydro-1H-pyrido[2,3-d]pyrimidine-2,4-dione