反应详情

Methyl 1-methyl-4-oxo-2-cyclohexenecarboxylate [J. Am. Chem. Soc., 101, 6996 (1979)] (100 g) was dissolved in ethyl acetate (600 ml), 10% Pd-C (5 g) was added, and catalytic reduction was carried out at room temperature and 1 atomosphere. About 14 liters of hydrogen was absorged in about 2 hours. The catalyst was filtered off, and the filtrate was concentrated and distilled under reduced pressure to give methyl 1-methyl-4-oxocyclohexanecarboxylate (96.5 g, 95.4%, b.p. 82°-84° C./0.5 mmHg).

1. customwas carried out at room temperature
2. filtrationThe catalyst was filtered off
3. concentrationthe filtrate was concentrated
4. distillationdistilled under reduced pressure