1-chloro-5H-benzo[c][1,8]naphthyridin-6-one 、
1-乙炔基-2,4-二氟苯 在
1-[(2,4-difluorophenyl)ethynyl]benzo[c]-1,8-naphthyridin-6(5H)-one 作用下,
以to provide 252 (91 mg, 63% yield) as a tan solid的产率得到1-[(2,4-difluorophenyl)ethynyl]benzo[c]-1,8-naphthyridin-6(5H)-one