methyl 4-amino-1-methylpiperidine-4-carboxylate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1,4-Dichloro-7-isoquinolinylsulphonyl chloride (1.0 g, 3.37 mmol) was added to a solution of methyl 4-amino-1-methyl-4-piperidinecarboxylate (700 mg, 4.0 mmol) and triethylamine (700 μl, 1.0 mmol) in CH2Cl2 (60 ml), and the reaction stirred at room temperature for 18 h. The mixture was concentrated in vacuo, and the residue purified by column chromatography upon silica gel using an elution gradient of CH2Cl2 -MeOH-0.880 NH3 (97:3:0.3 to 95:5:0.5) to give methyl 4-{[(1,4-dichloro-7-isoquinolinyl)sulphonyl]amino}-1-methyl-4-piperidinecarboxylate (700 mg, 1.62 mmol) as a white solid. The mixture was concentrated in vacuo the residue purified by column chromatography upon silica gel using an elution gradient of CH2Cl2 -MeOH-0