(1S,2S,3R,4R)-3-[6-Chloro-2-(4-morpholin-4-ylmethyl-phenyl)-3H-imidazo[4,5-b]pyridine-7-ylamino]-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid amide-trifluoroacetate salt 、
(1S,2S,3R,4R)-3-(2,3-diamino-5-chloropyridin-4-ylamino)bicyclo[2.2.1]hept-5-ene-2-carboxylic acid amide 、
1-Boc-哌啶-3-甲醛 以to produce the title compound (65%)的产率得到3-[7-((1S,2S,3R,4R)-3-carbamoylbicyclo[2.2.1]hept-5-en-2-ylamino)-6-chloro-3H-imidazo[4,5-b]pyridine-2-yl]piperidine-1-carboxylic acid tert-butyl ester