Toluene → Ethyl trans-4-(p-fluorophenyl)-6-oxo-3-piperidinecarboxylate

Participants

Reaction Conditions

Reaction Steps

3.8 g of the cis/trans mixture of ethyl 4-(p-fluorophenyl)-6-oxo-3-piperidinecarboxylate obtained in Examples 4 to 6 was added to 100 mL of toluene, and 2.7 mL of a 28% methanol solution of sodium methoxide was added. The reaction mixture was heated at 110° C. for 2.5 hours, then poured into ice water and extracted with ethyl acetate. The extract was washed with water, dried and concentrated to obtain 3.28 g of ethyl trans-4-(p-fluorophenyl)-6-oxo-3-piperidinecarboxylate.

Provenance & Evidence