Dimethylformamide → HCID 69955571, compound

Participants

Reaction Steps

Phosphorus oxychloride (0.30 ml) was added to a mixture of 4-n-butylidene-5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophene-2-carboxamide (0.55 g) and dimethylformamide (DMF) (6 ml) with ice-water cooling under nitrogen atmosphere, and the mixture was stirred under the same condition for 1 hour. The reaction mixture was poured into an ice-cooled mixture of an aqueous solution of NaHCO3 and AcOEt to precipitate. The precipitate was collected by filtration, washed with water, and dried in vacuo to give 4-n-butylidene-5,6,7,8-tetrahydro-2-cyano-4H-cyclohepta[b]thiophene (0.42 g), which was immediately used in the next reaction.

Provenance & Evidence