N1-[(2R,3S)-4-Oxo-2-phenyl-2,3,4,5-tetrahydro-1,5-benzoxazepin-3-yl]-N2-(phenylacetyl)-L-alaninamide 、
4-氟苯乙酸 以to afford the title compound as a 1:1 mixture with the 2S,3R diastereomer (134 mg), white solid, m.p. 130-140° C的产率得到N2-[(4-fluorophenyl)acetyl]-N1-[(2R,3S)-4-oxo-2-phenyl-2,3,4,5-tetrahydro-1,5-benzoxazepin-3-yl]-L-alaninamide