| 摘要 |
1,226,469. α-Pyrrolidone. SUMITOMO CHEMICAL CO. Ltd. 6 May, 1969 [16 May, 1968], No. 23115/69. Heading C2C. α-Pyrrolidone is prepared by contacting succinonitrile with hydrogen under a pressure from 50 to 200 atm. in the presence of a hydrogenation catalyst in a N-containing basic, organic solvent at 80-200‹ C. for 0.5 to 3.7 minutes, adding water or aqueous ammonia solution to the reaction mixture and heating to 200-300‹ C. Suitable hydrogenation catalysts are Ni-silica gel, Pd-C, Raney-Ni or Co. The solvent may be pyridine, N,N-dimethyl-formamide, α-pyrrolidone or N-methylpyrrolidone. |
