Thionyl Chloride → HCID 20448112, compound

Participants

Reaction Steps

A mixture of 6,7-diacetoxy-4-oxo-4H-1-benzothiopyran-3-carboxylic acid (50 mg), thionyl chloride (40 μL), and dimethylformamide (one drop) was heated under reflux for 2 hours in benzene (20 mL), and then the solvent was distilled off. To the residue was added benzene (20 mL). Benzene was evaporated again and the residue was vacuum dried to give 6,7-diacetoxy-4-oxo-4H-1-benzothiopyran-3-carbonyl chloride.

Provenance & Evidence