Methanol → HCID 14010767, compound

Participants

Reaction Steps

In 15 ml of methanol was dissolved 0.2 g of methyl 6-(4-benzyloxycarbonylaminocyclohexyl)-1-(4-hydroxy-2-methylphenyl)-4-oxo-1,4-dihydronicotinate, and 0.05 g of 5% by weight palladium carbon was added to the resulting solution, and the above ester was hydrogenated under atmospheric pressure for 1.5 hours. Then, the catalyst was removed by filtration, and the solvent was removed by distillation under reduced pressure. To the residue was added 0.4 g of 37% by weight formalin and 0.1 g of formic acid, and they were reacted at 100° C. for 7.5 hours. After completion of this reaction, the solvent was removed by distillation under reduced pressure, and the residue was purified by a column chromatography (Wako Silica Gel C-200; eluent: chloroform/ethanol (3:1 by volume) mixture) to obtain 0.04 g of 6-(4-dimethylaminocyclohexyl)-1-(4-hydroxy-2-methylphenyl)-4-oxo-1,4-dihydronicotinic acid having a melting point of 207°-215° C.

Provenance & Evidence