tert-Butyl{1-[2-(6-chloro-3-oxo-1,2,4-benzotriazin-4(3H)-yl)ethyl]piperidin-4-yl}carbamate 、
三氟乙酸 、
1-[2-(4-aminopiperidin-1-yl)ethyl]-2-oxo-1,2-dihydroquinoxaline-6-carbonitrile 以to give the crude free base of the product, 67 mg的产率得到4-[2-(4-aminopiperidin-1-yl)ethyl]-6-chloro-1,2,4-benzotriazin-3(4H)-one