Hydrochloric Acid → [(3-Phenylacryloyl)oxy]acetic acid

Participants

Reaction Steps

To a solution of glycolic acid (15.2 g.) in pyridine (100ml.) was added cinnamoyl chloride (33.4 g.) with stirring under cooling. The reaction mixture was stirred at room temperature for 5 hours and concentrated under reduced pressure at 50° to 60° C. The residue was adjusted to pH 1 with concentrated hydrochloric acid and extracted with ether. The extract was washed with water and a sodium chloride aqueous solution, in turn and concentrated under reduced pressure to give colorless crystals (45 g.). These crystals were dissolved in a sodium bicarbonate aqueous solution and adjusted to pH 3 to 3.5 with aqueous hydrochloric acid and extracted with ether. The extract was treated with a conventional manner to give crude product (16.5 g.). The product was recrystallized from benzene to give a product of 2-cinnamoyloxyacetic acid (10.4 g.), m.p. 116° to 121° C.

Provenance & Evidence