Hydrochloric Acid → N-(2-Fluorobenzoyl)methionine

Participants

Reaction Steps

To a clear solution of D,L-methionine (10 g, 67.02 mmol) and NaOH (4.0 g, 100.53 mmol) in acetone (100 ml)/ H2O (100 ml) was added 2-fluorobenzoyl chloride dropwise with stirring between each addition. Basicity was maintained by adding 2N NaOH when necessary. After addition was completed, the reaction mixture was acidified to pH 2 with 6N HCl and extracted into EtOAc. The organic layer was dried with Na2SO4, filtered, and concentrated to give provide 2-(2-fluorobenzoylamino)-4-methylsulfanyl-butyric acid (intermediate XIIa, 13.6 g) as an oil.

Provenance & Evidence