N-bromobutanimide → 4-(bromomethyl)-N-tert-butyl-2-methoxybenzamide

Participants

Reaction Steps

An amount of 160 mg (0.72 mmol) of the compound from Example 22A was heated under reflux with 129 mg (0.72 mmol) of N-bromosuccinimide and also 12 mg (0.07 mmol) of 2,2′-azobis-2-methylpropanenitrile in 5 ml of carbon tetrachloride for 16 h. After cooling to RT, the mixture was diluted with 10 ml of dichloromethane and washed with 10 ml of water. It was dried over sodium sulphate, filtered and concentrated under reduced pressure. The crude product was subsequently purified by chromatography [Method 8]. This gave 103 mg (47% of theory) of the target compound.

Provenance & Evidence