2-Propenoic acid, 3-phenyl-, methyl ester → 2-Propenoic acid, 3-phenyl-

Participants

Reaction Conditions

Reaction Steps

A 3 l flask equipped with a stirrer was charged with 100.0 grams (0.617 mol) of methyl cinnamate and 1260 grams of aqueous solution containing 25.9 grams (0.647 mol) of sodium hydroxide and vigorously stirred for 15 minutes at 80° C. The obtained aqueous alkaline solution of sodium cinnamate having concentration of 7.7% by weight was added in a lump with 1240 ml of aqueous sulfuric acid solution containing 0.35 ml of sulfuric acid. The resultant slurry having concentration of 3.4% by weight was cooled to room temperature and measured pH to give a value of about 2. The total reaction mixture was discharged and filtered with suction. The separated precipitates were 87.8 grams (96.0% yield) and had purity of above 99.9%. The quantity of cinnamic acid produced per l of water used and per unit volume of the reaction vessel were 36 g/l and 35 g/l respectively.

Provenance & Evidence