Hydrogen Peroxide → HCID 13280944, compound

In one portion, 0.9 ml (7.9 mmol) of 30% hydrogen peroxide was added to 40 ml of a 1% solution of concentrated sulfuric acid in acetic acid. After stirring for 1 hour, 2.0 g (5.6 mmol) of 8-chloro-6-(2-chlorophenyl)-1-ethyl-2H,4H-pyrrolo[3,4-d][2]benzazepine were added, and the resulting mixture was stirred for 20 minutes. The excess peracid was discharged by the addition of saturated aqueous sodium bisulfite solution, and the mixture was concentrated at reduced pressure. The residue was partitioned between methylene chloride and water and neutralized with concentrated ammonium hydroxide solution. The methylene chloride solution was washed with brine, dried over anhydrous sodium sulfate, and concentrated at reduced pressure. The resulting oil was crystallized from ether to give 8-chloro-6-(2-chlorophenyl)-1-ethyl-1,4-dihydropyrrolo[3,4-d][2]benzazepin-3(2H)-one as yellow prisms, mp 233°-235° C. Recrystallization from a mixture of ethyl acetate and methanol gave colorless prims, mp 236°-237° C.

1. stirringthe resulting mixture was stirred for 20 minutes
2. concentrationthe mixture was concentrated at reduced pressure
3. customThe residue was partitioned between methylene chloride and water and neutralized with concentrated ammonium hydroxide solution
4. washThe methylene chloride solution was washed with brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated at reduced pressure
7. customThe resulting oil was crystallized from ether

ORD record

ord-a18503db013a497eb9fd3778341c3b5f

Source dataset

uspto-grants-1984_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04436662