3-naphthalen-1-ylpropanoyl chloride

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 14.8 mmole of butyllithium in hexane were added dropwise to a solution of 2.63 g (14.8 mmole) of (S)-(-)-4-benzyl-2-oxazolidinone dissolved in 50 ml of anhydrous tetrahydrofuran at -78° C. under an atmosphere of nitrogen. The mixture was stirred for 30 minutes at this temperature, and then 2.95 g (13.5 mmole) of 1-naphthylpropionyl chloride in 15 ml of anhydrous tetrahydrofuran were slowly added dropwise at the same temperature=the mixture was then stirred for 3 hours. At the end of this time, a saturated aqueous solution of sodium chloride was added to the mixture, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate, and then freed from the solvent by evaporation under reduced pressure. The residue was purified by silica gel column chromatography (eluent: a 1: 4 by volume mixture of ethyl acetate and hexane), to afford 4.65 g (96%) of the title compound as a white amorphous substance. was then stirred for 3 hours the mixture was extracted with ethyl acetate The extract was dried over anhydrous magnesium sulfate freed from the solvent by evaporation under reduced pressure The residue was purified by silica gel column chromatography (eluent a 1: 4 by volume mixture of ethyl acetate and hexane),