(S)-tert-butyl 1-{5-[3-(cyclopropanecarbonyl)-6-(3,5-dichloro-4-hydroxyphenyl)-1,5-naphthyridin-4-ylamino]pyridin-2-yl}piperidin-3-ylcarbamate 在
三氟乙酸 、
盐酸 作用下,
以
甲醇 为溶剂,
以42%的产率得到(S)-(4-(6-(3-aminopiperidn-1-yl)pyridin-3-ylamino)-6-(3,5-dichloro-4-hydroxyphenyl)-1,5-naphthyridin-3-yl)(cyclopropyl)methanone trihydrochloride