Toluene → HCID 23462925, compound

Participants

Reaction Steps

To a solution of 18.21 g. (0.0446 mole) of 9-bromo-7,8-dimethoxy-3-methyl-6-phenylthio-2,3,4,5-tetrahydro-1H-3-benzazepine (prepared as in Example 20) in 200 ml. of toluene, cooled to -78° C., is slowly added 26.0 ml. of 2.1 M n-butyl lithium in hexane. After 20 minutes at this temperature 23.1 ml. of dimethylformamide is added and the mixture is stirred for 1/2 hour. The reaction mixture, at room temperature, is poured into 10% sodium hydroxide solution and extracted with ethyl acetate. The extract is washed with water, dried and concentrated to give 7,8-dimethoxy-3-methyl-6-phenylthio-2,3,4,5-tetrahydro-1H-3-benzazepine-9-carboxaldehyde.

Provenance & Evidence