Sulfuric Acid → HCID 13676786, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of (5-oxo-10,11-dihydrodibenzo[a,d]cyclohepten-2-yl)acetamide (17.4 g.) in a mixture of concentrated sulphuric acid (d = 1.83; 70 cc.) and water (70 cc.) is heated with vigorous stirring for 3 hours at 100°C. After cooling, the product which precipitates is filtered off and then added to 2N sodium hydroxide solution (200 cc.). The alkaline solution is extracted with diethyl ether and then acidified by adding 2N sulphuric acid (250 cc.). The product which precipitates is filtered off, dried and then recrystallised from ethyl acetate (100 cc.) to give (5-oxo-10,11-dihydrodibenzo[a,d]cyclohepten-2-yl)acetic acid (11.5 g.) melting at 154°C.

Provenance & Evidence