Hydrochloric Acid → (R)-4-Benzyl-5-oxo-3-morpholinecarboxylic Acid

Participants

Reaction Steps

The title compound was prepared according to the method described by H. H. Otto, Helvetica Chimica Acta, 2004, 87, 90. To an ice cooled solution of N -(phenylmethyl)-D-serine (8.90g, 45.59mmol) in 2N NaOH solution (50 mL) was added chloroacetyl chloride (4.36 mL, 54.71 mmol), dropwise over 15 minutes. The reaction was stirred for 30 minutes before adding 30% NaOH solution (4.5 g in 15 mL) and stirring at R.T. for 2 and ½ hours. It was cooled in an ice bath before adding c.HCl solution to pH<1. solid precipitated out. Filtered. Suspended in isopropanol and heated at reflux for 10 minutes. Filtered hot. Solvent evaporated to afford a pale yellow solid. Triturated with Et2O to afford the title compound as a cream solid in 29% yield.

Provenance & Evidence