(5-{5-[(5-chloropyridine-2-carbonyl)amino]-2-fluorophenyl}-5-trifluoromethyl-5,6-dihydro-2H-[1,4]oxazin-3-yl)carbamic acid tert-butyl ester 在
盐酸 作用下,
以
1,4-二氧六环 为溶剂,
生成
5-chloropyridine-2-carboxylic acid [3-(5-amino-3-trifluoromethyl-3,6-dihydro-2H-[1,4]oxazin-3-yl)-4-fluorophenyl]amide