1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → tert-Butyl 2-(5-(4-(4-cyanophenyl)piperidine-1-carbonyl)-2-cyclobutyl-4-methylphenyl)-6,7-dihydro-3H-imidazo[4,5-c]pyridine-5(4H)-carboxylate

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Reaction Steps

To a solution of 5-(5-(tert-butoxycarbonyl)-4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridin-2-yl)-4-cyclobutyl-2-methylbenzoic acid (compound 406.1, 1.00 g, 1.22 mmol, 1.00 equiv, 50%) in N,N-dimethylformamide (5 mL) were added 4-(piperidin-4-yl)benzonitrile hydrochloride salt (compound 1.5, 270 mg, 1.21 mmol, 1.00 equiv), EDC.HCl (460 mg, 2.40 mmol, 2.00 equiv), and 4-dimethylaminopyridine (296 mg, 2.42 mmol, 2.00 equiv). The resulting mixture was stiffed at 25° C. overnight. The mixture was then diluted with 30 mL of ethyl acetate, washed with 3×30 mL of brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to yield 890 mg (63%) of the title compound as a brown solid.

Provenance & Evidence