tert-butyl 3-[4-(7-tert-butoxycarbonylaminomethylimidazo[1,2-a ]pyridin-2-yl)benzamido]propionate 、
tert-butyl 3-[4-(7-tert-butoxycarbonylaminomethyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl)benzamido]propionate 、 tert-butyl 1-[4-(7-tert-butoxycarbonylaminomethylimidazo[1,2-a]pyridin-2-yl)benzoyl]piperidine-4-carboxylate 、 tert-butyl 1-[4-(6-tert-butoxycarbonylaminomethyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl)benzoyl]-piperidine-4-carboxylate 、 tert-butyl 1-[4-(7-tert-butoxycarbonylaminomethyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl)benzoyl]-piperidine-4-carboxylate 在
三氟乙酸 作用下,
生成 3-[4-(7-aminomethyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl)benzamido]propionic acid bistrifluoroacetate