(R)-(4-(5-chloropyrido[2,3-d]pyridazin-8-yl)-3-methylpiperazin-1-yl)(phenyl)methanone 、
4-三氟甲基苯硼酸 、
disodium;carbonate 在
四(三苯基膦)钯 作用下,
以afforded (R)-(3-methyl-4-(5-(4-(trifluoromethyl)phenyl)pyrido[2,3-d]pyridazin-8-yl)piperazin-1-yl)(phenyl)methanone 84的产率得到(R)-(3-methyl-4-(5-(4-(trifluoromethyl)phenyl)pyrido[2,3-d]pyridazin-8-yl)piperazin-1-yl)(phenyl)methanone