tert-butyl 4-(7-oxothiazolo[4,5-d]pyridazin-6(7H)-yl)piperidine-1-carboxylate 、
5-bromo-2,7-dimethylpyrazolo[3,4-c]pyridine 在
copper(I) bromide dimethylsulfide complex 、 chloro-(1-tert-butyl-1H-inden-1-yl)(tri-tert-butylphosphine)palladium(II) 、
potassium hydrogencarbonate 、
三甲基乙酸 作用下,
以
甲苯 为溶剂,
以13 %的产率得到tert-butyl 4-(2-(2,7-dimethyl-2H-pyrazolo[3,4-c]pyridin-5-yl)-7-oxothiazolo[4,5-d]pyridazin-6(7H)-yl)piperidine-1-carboxylate