Hydrogen chloride-ethyl acetate → HCID 66976532, compound
Reaction equation
[C:1]([NH:4][CH2:5][C@H:6]1[C@H:12]([C:13]2[CH:18]=[CH:17][C:16]([Cl:19])=[C:15]([Cl:20])[CH:14]=2)[O:11][CH2:10][CH2:9][N:8](C(OC(C)(C)C)=O)[CH2:7]1)(=[O:3])[CH3:2].C(OCC)(=O)C.Cl>C(O)C>[Cl:20][C:15]1[CH:14]=[C:13]([C@@H:12]2[O:11][CH2:10][CH2:9][NH:8][CH2:7][C@H:6]2[CH2:5][NH:4][C:1](=[O:3])[CH3:2])[CH:18]=[CH:17][C:16]=1[Cl:19]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of tert-butyl (6R,7R)-6-[(acetylamino)methyl]-7-(3,4-dichlorophenyl)-1,4-oxazepane-4-carboxylate (160 mg) in ethanol (0.5 mL) was added 4.0 M hydrogen chloride-ethyl acetate solution (3 mL), and the mixture was stirred at room temperature for 1.5 hr. The solvent was evaporated under reduced pressure. To the residue was added 1 N aqueous sodium hydroxide solution, and the mixture was extracted twice with ethyl acetate. The combined organic layers were washed with brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in ethanol, and a solution of fumaric acid (39.3 mg) in ethanol was added. The solvent was evaporated under reduced pressure. The obtained crystals were recrystallized from ethanol-ethyl acetate to give the title compound (73.5 mg) as colorless crystals.