反应详情

The process is performed according to the procedure described in Example 1 (step 1.5). Starting with 0.72 g (2.08 mmol) of 3-{2-[1-(6-isobutyl-2-pyridyl)-4-piperidyl]ethyl}-1,3-oxazolidine-2,4-dione, obtained in step 13.4, and 5.20 ml (10.40 mmol) of a solution (2M) of methylamine in tetrahydrofuran, and after chromatography on silica gel, eluting with a 95/5/0.5 mixture of dichloromethane, methanol and 28% aqueous ammonia, followed by crystallization from diisopropyl ether, 0.540 g of pure product is obtained in the form of a white solid.