4-Methylmorpholine → HCID 86604639, compound

Participants

Reaction Steps

To a stirred solution of methyl [(2R,3S)-3-amino-4-oxo-2-phenyl-3,4-dihydro-1,5-benzoxazepin-5(2H)-yl]acetate (70b) (130 mg, 0.398 mmol) in dichloromethane (4 mL) was added N-[(3,5-difluorophenyl)acetyl]-L-alanine (1e) (125 mg, 0.514 mmol), HOBt (71 mg, 0.525 mmol), NMM (53 mg, 0.525 mmol) and EDAC-HCl (100 mg, 0.522 mmol). After stirring at ambient temperature under nitrogen for 48 h the solvent was evaporated and the residue partitioned between ethyl acetate and saturated aqueous sodium bicarbonate. The organic solution was separated, washed with 1N aqueous HCl then dried, filtered and evaporated. The residue was purified by flash chromatography on silica gel eluting with 1:1 (v/v) hexane:ethyl acetate to afford the title compound (185 mg, 82%) as a white solid. TLC Rf=0.13 (1:1 hexane:ethyl acetate). 1H NMR (300 MHz, CDCl3) δ1.21 (d, 3H, J=7.0 Hz), 3.46 (s, 2H), 3.80 (s, 3H), 4.23 (m, 1H), 4.55 and 4.68 (AB quartet, 2H, J=17.1 Hz), 5.16 (t, 1H, J=7.2 Hz), 5.72 (d, 1H, J=7.4 Hz), 5.87 (br d, 1H, J=7.0 Hz), 6.17 (br d, 1H, J=6.6 Hz), 6.66-6.87 (m, 3H), 7.19-7.33 (m, 4H), 7.37 (s, 5H). MS APCI, m/z=552 (M+1). LC/MS: 2.52 min.

Provenance & Evidence