Cl[C:2]1[N:7]=[N:6][C:5]([N:8]2[CH2:11][CH:10]([C:12]([NH:14][C:15]3[CH:20]=[CH:19][C:18]([CH:21]4[CH2:26][CH2:25][N:24]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:23][CH2:22]4)=[CH:17][CH:16]=3)=[O:13])[CH2:9]2)=[CH:4][CH:3]=1.C(N(CC)CC)C.C1CC=CCC=1>[Pd]>[N:7]1[CH:2]=[CH:3][CH:4]=[C:5]([N:8]2[CH2:11][CH:10]([C:12]([NH:14][C:15]3[CH:16]=[CH:17][C:18]([CH:21]4[CH2:22][CH2:23][N:24]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:25][CH2:26]4)=[CH:19][CH:20]=3)=[O:13])[CH2:9]2)[N:6]=1To a 50 mL round-bottomed flask was added tert-butyl 4-(4-(1-(6-chloropyridazin-3-yl)azetidine-3-carboxamido)phenyl)piperidine-1-carboxylate (550 mg, 1.165 mmol) and Pd/C (93 mg, 0.087 mmol). The flask was flushed with nitrogen for 10 minutes and ethanol (11.7 ml) was added. Triethylamine (0.162 ml, 1.165 mmol) and cyclohexa-1,4-diene (654 mg, 8.16 mmol) were added and the reaction was stirred at 80° C. for 1 hour, cooled and filtered through diatomaceous earth. The filtrate was concentrated in vacuo and the residue was purified by regular phase flash column chromatography to give the title compound.
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