2,3,4,5-tetrahydro-2-benzazepin-1-one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: With cooling with ice, 2.6 g of sodium azide was added to a concentrated hydrochloric acid (60 mL) solution of 5 mL of alpha-tetralone, and stirred at room temperature for 15 hours. The reaction liquid was poured into ice water, and neutralized with potassium carbonate. This was extracted with chloroform, and the organic layer was washed with saturated saline water and dried with anhydrous magnesium sulfate. The solvent was evaporated away under reduced pressure, and the crude product was purified through silica gel column chromatography (chloroform/methanol) to obtain 2.3 g of the entitled compound as a yellow solid. The reaction liquid This was extracted with chloroform the organic layer was washed with saturated saline water dried with anhydrous magnesium sulfate The solvent was evaporated away under reduced pressure the crude product was purified through silica gel column chromatography (chloroform/methanol)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 2.7 g of O-amino-sulfonic acid and 1.25 g of a 55% oily suspension of sodium hydride in 30 ml of dimethylformamide and 30 ml of tetrahydrofuran was gradually added at a temperature of 10° C. to a suspension of 9.66 g (0.0176 mol) 4,5-dihydro-2-benzazepine-1(2H,3H)-one. After standing for 1 hour at room temperature the mixture was poured into a saturated aqueous solution of NaCl, then the organic layer was separated and the mother liquors were extracted with 300 ml (3×100 ml) of an 1:1 (v:v) mixture of tetrahydrofuran and dimethylformamide. The organic phases were combined and brought to dryness. The obtained residue was subsequently taken up with 500 ml of ethyl acetate and the resulting organic solution was extracted with 200 ml (5×40 ml) of a 3% aqueous solution of HCl. The acidic extract was made alkaline with 5% aqueous sodium hydroxide and subsequently extracted with ethyl acetate. After evaporating the solvent, an oily residue was obtained which was distilled under reduced pressure. Yield: 10 g. of the title compound. B.p. 120° C./0.2 mmHg the organic layer was separated the mother liquors were extracted with 300 ml (3×100 ml) of an 1:1 (v:v) mixture of tetrahydrofuran and dimethylformamide the resulting organic solution was extracted with 200 ml (5×40 ml) of a 3% aqueous solution of HCl The acidic extract subsequently extracted with ethyl acetate After evaporating the solvent an oily residue was obtained which was distilled under reduced pressure