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4-(5-chloropyridin-3-yl)-2-(cyclopentyl(hydroxy)methyl)-3-((trans-4-methylcyclohexyl)methyl)-3H-imidazo[4,5-c]pyridine-6-carbonitrile (240 mg, 0.517 mmol) was dissolved in THF (5.2 mL) and cooled to 0° C. in a flask under nitrogen before adding sodium hydride (41.4 mg, 1.034 mmol). Upon cessation of gas evolution, iodoethane (0.125 μL, 1.552 mmol) was added, and the reaction was allowed to warm to room temperature overnight. The reaction mixture was quenched with sat. aqueous ammonium chloride and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, filtered, and concentrated. The residue was purified by silica gel chromatography (hexanes/0-40% EtOAc) to afford racemic 4-(5-chloropyridin-3-yl)-2-(cyclopentyl(ethoxy)methyl)-3-((trans-4-methylcyclohexyl)methyl)-3H-imidazo[4,5-c]pyridine-6-carbonitrile. The racemic material was then purified by chiral supercritical fluid chromatography (Chiralpak IC, 21×250 mm, 2-Propanol +0.25% Dimethyl Ethyl Amine in CO2) to afford 4-(5-chloropyridin-3-yl)-2-(R)-cyclopentyl(ethoxy)methyl)-3-((trans-4-methylcyclohexyl)methyl)-3H-imidazo[4,5-c]pyridine-6-carbonitrile and 4-(5-chloropyridin-3-yl)-2-((S)-cyclopentyl(ethoxy)methyl)-3-((trans-4-methylcyclohexyl)methyl)-3H-imidazo[4,5-c]pyridine-6-carbonitrile. 1H NMR (600 MHz, CD3OD) δ 8.78 (d, J=2.3, 1H), 8.75 (d, J=1.5, 1H), 8.29 (t, J=2.0, 1H), 8.24 (s, 1H), 4.65 (d, J=8.5, 1H), 4.08-3.97 (m, 2H), 3.59-3.34 (m, 2H), 2.65-2.54 (m, 1H), 1.88-1.77 (m, 1H), 1.73-1.54 (m, 6H), 1.49 (d, J=13.2, 2H), 1.30-1.25 (m, 1H), 1.17 (t, J=7.0, 3H), 1.15-1.08 (m, 1H), 1.01-0.95 (m, 1H), 0.91-0.76 (m, 4H), 0.75 (d, J=6.6, 3H), 0.56-0.45 (m, 2H). MS ESI calc'd. for C28H34ClN5O [M+H]+ 492. found 492.

1. temperatureto warm to room temperature overnight
2. customThe reaction mixture was quenched with sat. aqueous ammonium chloride
3. extractionextracted with ethyl acetate
4. dry with materialThe organic layer was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by silica gel chromatography (hexanes/0-40% EtOAc)