L-4-氰基苯丙氨酸 、
sodium;hydride 、 6-[({1-[2-(7-fluoro-2-oxo-1(2H)-quinolinyl)ethyl]-4-piperidinyl}amino)methyl]-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one 、
{1-[2-(7-methoxy-2-oxo-2H-quinolin-1-yl)-ethyl]-piperidin-4-yl}-carbamic acid tert-butyl ester 以to give the product as a solid in 92% yield的产率得到tert-butyl {1-[2-(6-bromo-3-oxo-2,3-dihydro-4H-pyrido[3,2-b][1,4]oxazin-4-yl)ethyl]piperidin-4-yl}carbamate