Hydrochloric Acid → L-Alanine, N-(2,6-dimethylphenyl)-

Participants

Reaction Steps

1,000 ml (2 mol) of 2 molar methanolic potassium hydroxide solution were added to a solution of 207 g (1 mol) of N-(2,6-dimethylphenyl)-alanine methyl ester in 1,000 ml of methanol and the mixture was heated under reflux for 3 hours. After cooling, the reaction solution was acidified with 190 ml of concentrated hydrochloric acid, the potassium chloride which had precipitated was filtered off and the filtrate was evaporated in vacuo. The oily residue crystallized on grinding and warming with 350 ml of ethyl acetate and 100 ml of petroleum ether. 133 g (68% of theory) of N-(2,6-dimethylphenyl)-alanine with a melting point of 178°-180° C. were obtained.

Provenance & Evidence