Water → HCID 23460502, compound

Participants

Reaction Steps

To a solution of 3-chloro-5-methoxyxanthone (12.5 g.) [see Examples 32 and 33] in dry dichloromethane at 0° C. is slowly added boron tribromide (24 ml.). The mixture is stirred at room temperature for 24 hours, then poured into water. The resulting precipitate if filtered off and dried to give 3-chloro-5-hydroxyxanthone which is used without further purification.

Provenance & Evidence