Hydrochloric Acid → 1,5-Dichloro-3,3-dimethylpentan-2-one

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Reaction Steps

A powerful stream of hydrogen chloride from a cylinder is passed into 476 g (3.25 moles) of 2-chloromethylene-3,3-dimethyltetrahydrofuran, while cooling with ice. The gas is absorbed completely and the internal temperature rises up to 30° C. When the reaction mixture is completely saturated with hydrogen chloride, it is subsequently stirred at room temperature for 2 hours. Excess hydrogen chloride is first stripped off under a waterpump, and the mixture is then distilled under a good vacuum. 531 g (90% of theory) of 1,5-dichloro-3,3-dimethyl-2-pentanone of boiling point 85°-90° C./0.3 mbar are obtained. ##STR96##

Provenance & Evidence