methyl (R)-5-(2-methylpiperazin-1-yl)pyrazine-2-carboxylate 、
(6-chloro-4,5-dimethyl-pyridazin-3-yl)-phenyl-methanone 在
sodium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 4.0h,
以32%的产率得到(R)-4-(6-benzoyl-4,5-dimethyl-pyridazin-3-yl)-2-methyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-carboxylic acid methyl ester