4-Methylmorpholine → HCID 54271608, compound

Participants

Reaction Conditions

Reaction Steps

The above-prepared (R)-2-(benzyloxycarbonylamino)-3-(4-phenoxyphenylthio)-propionic acid was dissolved in methylene chloride (175 ml), cooled to 0° C., and treated with O-(tert-butyl)hydroxylamine hydrochloride (7.7 g), 4-methylmorpholine (9.4 ml), 1-hydroxybenzotriazole (2.8 g), and N-ethyl-N'-(3-dimethylaminopropyl)-carbodiimide (7.9 g). The mixture was allowed to warm to room temperature, stirred for 1.5 hours, then partitioned between methylene chloride and water. Solvent was removed from the organic phase under reduced pressure, and the residue purified by flash chromatography on silica gel, eluting with 0 to 50% ethyl acetate/hexane, to provide (R)-2 -(benzyloxycarbonylamino)-N-tert-butoxy-3-(4-phenoxyphenylthio)-propionamide (7.4 g) as a white foam.

Provenance & Evidence