2-Chloro-1,3,5-trimethylbenzene → HCID 58913587, compound

Participants

Reaction Conditions

Reaction Steps

BF3—OEt2 complex (7 ml, 56 mmol) was gradually added to a solution of 1-(5-chloro-2,4-dihydroxy-phenyl)-2-(2-methoxy-phenyl)-ethanone (4.1 gm, 14 mmol) in DMF at 0° C. The resulting solution was stirred for 30 min. Mesityl chloride (1.5 ml, 42 mmol) was then gradually added to it at 50° C. The solution was then heated up to 110° C. for 5 hours. The mixture was then concentrated. The residue was treated with ice and the solid obtained was purified with silica gel column chromatography using hexane-chloroform as the eluent to give 6-chloro-7-hydroxy-3-(2-methoxy-phenyl)-chromen-4-one (2.5 gm, 60%) as white solid.

Provenance & Evidence