Hydrochloric Acid → HCID 66732187, compound

Participants

Reaction Steps

Methyl 2-phenylisonicotinate (3.182 g, 14.92 mmol) (from reference compound 34, step 1) was dissolved in MeOH (30 mL) and hydrogen chloride (1.25 M in MeOH, 14.33 mL, 17.91 mmol) was added. The solvents were evaporated to give a slightly yellow solid. The residue was dissolved in MeOH (60 mL) and platinum(IV) oxide (0.102 g, 0.45 mmol) was added. The resulting mixture was then hydrogenated in a Büchi hydrogenator at 8 bar for 5 h. More platinum(IV) oxide (121 mg) was added and the hydrogenation continued overnight at 8 bar (15 h). Platinum(IV) oxide (120 mg) was added and the hydrogenation continued at 60 C for 5 hours. Platinum(IV) oxide (120 mg) was added and the hydrogenation was continued at 60 C overnight (15 h). The reaction mixture was filtered through diatomic earth containing filter carton and washed with methanol. The solvents were evaporated and the residue dried in vacuum to give a white solid. The residue was redissolved in MeOH (60 mL). Platinum(IV) oxide (340 mg) was added and the hydrogenation continued at 8 bar, 60 C overnight (22 h). The reaction mixture was filtered through diatomic earth containing filter carton and washed with methanol. The solvents were evaporated and the residue dried in vacuum to give methyl 2-cyclohexylpiperidine-4-carboxylate hydrochloride (3.50 g, 89%) as a white solid. MS m/z 226 (M+H)+

Provenance & Evidence