Ethyl Acetate → HCID 11428608, compound

Participants

Reaction Conditions

Reaction Steps

12.6 g of 2-[(4-bromobenzylidene)amino]-3-methylbutyric acid sodium salt (41.1 mmoles) are suspended in 80 ml of dry dichloromethane. The mixture is refluxed (40° C.), under slight nitrogen stream. 7.9 g of valeryl chloride (65.5 mmoles) are added. After 2 hours under reflux, the mixture is cooled to 25° C. The organic phase is washed three times with 50 ml of water and concentrated under reduced pressure, at 25-30° C., to obtain an oily residue. 50 ml of ethyl acetate are added and the organic phase is washed with a weakly basic NaOH solution and/or with water to neutrality. The organic phase is washed with a sodium bisulfite solution. The organic phase is washed with water and dried over sodium sulfate, filtered and evaporated under reduced pressure. The oily residue is taken up with ethanol from which the product crystallizes as a white solid. 2-(4-Bromophenyl)-4-isopropyl-3-pentanoyl-oxazolidin-5-one is obtained (5.2 g; 14.1 mmoles; molar yield: 34%).

Provenance & Evidence