Hydrochloric Acid → N-(cis-7-chloro-1-isopropyl-5-phenyl-1,2,3,5-tetrahydro-2-oxo-4,1-benzoxazepin-3-ylacetyl)glycine

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Reaction Steps

In a mixture of 2 ml of methanol and 1 ml of water was suspended 48 mg of N-(trans-7-chloro-1-isopropyl-5-phenyl-1,2,3,5-tetrahydro-2-oxo-4,1-benzoxazepin-3-ylacetyl)glycine ethyl ester obtained in Example 55. To the suspension was added 0.1 g of potassium carbonate. The mixture was stirred for 6 hours at room temperature. The reaction mixture was adjusted to pH 4 with dilute hydrochloric acid, which was subjected to extraction with ethyl acetate. The organic layer was washed with water and dried, then the solvent was distilled off under reduced pressure. Crystals obtained form the residue were recrystallized from ether and hexane to afford 29 mg of N-(cis-7-chloro-1-isopropyl-5-phenyl-1,2,3,5-tetrahydro-2-oxo-4,1-benzoxazepin-3-ylacetyl)glycine as white needles.

Provenance & Evidence