Sodium Hydroxide → Fenoprofen

Participants

Reaction Steps

A mixture of 106.4 g. of 2-(3-phenoxy-phenyl)-2-cyano-propionic acid amide, 200 ml. of 40% aqueous sodium hydroxide and 400 ml. of alcohol is boiled under stirring for 20 hours. The alcohol is then distilled off and the residue is diluted with 200 ml. of water. The aqueous solution is acidified to pH=1 by adding concentrated hydrochloric acid. The separating oil is extracted with 3×500 ml of benzene. The benzene solution is evaporated after drying above sodium sulphate. Thus 96 g. (98.5%) 2-(3-phenoxy-phenyl)-propionic acid are obtained; the product is suitable for the preparation of salts without further purification.

Provenance & Evidence