Cl[C:2]1([C:8]([N:10]2[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]2)=[O:9])[CH:7]=[CH:6][CH:5]=[CH:4][NH:3]1.C(=[NH:29])(C1C=CC=CC=1)C1C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(C)([O-])C.[Na+].Cl>O1CCCC1.C1(C)C=CC=CC=1>[NH2:29][C:2]1([C:8]([N:10]2[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]2)=[O:9])[CH:7]=[CH:6][CH:5]=[CH:4][NH:3]1
Next, the 2-chloropyridinoyl-piperidine intermediate is reacted with benzophenone imine in the presence of tris(dibenzylidineacetone)-dipalladium(0) Pd2(dba)3) as a catalyst, and 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (BINAP) and sodium t-butoxide in a suitable solvent, such as toluene, at reflux, to substitute the halo group with the benzophenone imino group. After work-up, this intermediate is typically reacted with hydrochloric acid in a suitable solvent, such as tetrahydrofuran, and then purified to give the corresponding 2-aminopyridinoyl-piperidine intermediate.
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