Chlorine → HCID 69517714, compound

Participants

Reaction Steps

To a solution of ethyl 7,8-dimethyl-2-(trifluoromethyl)-2H-chromene-3-carboxylat (4.0 g, 13.3 mmol) in 75 mL HOAc was added Cl2 until the solvent was saturated as indicated by the greenish chlorine cloud above the solvent. After 2 h, the reaction was flushed with N2 and subsequently treated with excess Zn dust for 1.5 h. The reaction mixture was decanted from the Zn and concentrated under vacuum. The resulting residue was dissolved in 300 mL of EtOAc and washed with 100 mL 1 M KHSO4 and 100 mL brine. The organic layer was dried over MgSO4, filtered and concentrated under vacuum. The yield of ethyl 6-chloro-7,8-dimethyl-2-(trifluoromethyl)-2H-chromene-3-carboxylate was 5.2 g.

Provenance & Evidence