Hydrochloric Acid → 2,3-Dichloro-4-methoxycinnamic acid

Participants

Reaction Steps

A mixture of 2,3-dichloro-4-methoxybenzaldehyde (158 gm., 0.77 mole), malonic acid (146 gm., 1.4 mole), pyridine (450 ml.) and piperidine (15 ml.) is heated and stirred on a steam bath for 23/4 hours. The hot reaction mixture is poured, with stirring into a mixture of concentrated hydrochloric acid (770 ml.) and crushed ice (3.1 kg.).

Provenance & Evidence