tert-butyl 2-benzyl-4-(1-methyl-2-oxo-1,2,3,5-tetrahydrobenzo[5,6][1,4]oxazino[3,4-c][1,2,4]triazin-9-yl)piperidine-1-carboxylate 、
三氟乙酸 在
乙酸乙酯 、 petroleum ether 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以to give 9-(2-benzylpiperidin-4-yl)-1-methyl-3,5-dihydrobenzo[5,6][1,4]oxazino[3,4-c][1,2,4]triazin-2(1H)-one trifluoroacetic acid (0.030 g, 20% yield for three steps) as a solid的产率得到9-(2-benzylpiperidin-4-yl)-1-methyl-3,5-dihydrobenzo[5,6][1,4]oxazino[3,4-c][1,2,4]triazin-2(1H)-one trifluoroacetic acid