N-bromobutanimide → 3-Bromo-5,6-dimethoxy-phthalide

Participants

Reaction Steps

12 mmol of N-bromosuccinimide are added to 10 mmol of 5,6-dimethoxyphthalide dissolved in dichloromethane, and then the reaction mixture, illuminated by a halogen lamp, is heated at reflux for 2 hours. The mixture is then brought to ambient temperature and filtered, and the filtrate is subsequently evaporated, toluene is added, and the suspension obtained is filtered and the filtrate evaporated to yield the expected product.

Provenance & Evidence