Potassium Carbonate → HCID 22165450, compound

Participants

Reaction Steps

7.60 g of 4-acetyl-9-chloro-1,2,4,5,6,7-hexahydro-4-benzazecine-3,8-dione were dissolved in 240 ml of methanol and treated with a mixture of 36 ml of methanol and 4 ml of saturated potassium carbonate solution. The mixture was stirred at room temperature for 1 hour and thereafter the solvent was removed in vacuo. The residue was triturated in ethyl acetate. The crystallized-out 9-chloro-1,2,4,5,6,7-hexahydro-4-benzazecine-3,8-dione was filtered off and exhibited a melting point of 211°-214°. The filtrate was chromatographed on 100 g of silica gel (particle size 0.2-0.5 mm). A further portion of 9-chloro-1,2,4,5,6,7-hexahydro-4-benzazecine-3.8-dione can be isolated from the ethyl acetate eluate.

Provenance & Evidence