Fumaric Acid → N-[(6R,7S)-7-(3,4-dichlorophenyl)-1,4-oxazepan-6-yl]acetamide monofumarate

Participants

Reaction Steps

To tert-butyl (6R,7S)-6-(acetylamino)-7-(3,4-dichlorophenyl)-1,4-oxazepane-4-carboxylate (200 mg) was added 4.0 M hydrogen chloride-ethyl acetate solution (4 mL), and the mixture was stirred at room temperature for 1 hr. The residue obtained by concentration under reduced pressure was desalted by a solid phase extraction resin (column: PL StrastoSphere solid phase extraction resin (PL-HCO3 MP StratoSpheres™), 500 mg, StrastoSphere, mobile phase: methanol). To a solution of the residue obtained by concentration under reduced pressure in ethanol was added a solution of fumaric acid (33.7 mg) in ethanol. The mixture was concentrated under reduced pressure to give the title compound (130 mg).

Provenance & Evidence