3-Phenylprop-2-Enal → 4-Chloro-3,3-dimethyl-6-phenylhex-5-en-2-one

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Reaction Steps

20 g (0.15 mol) of cinnamaldehyde and 25.8 g (0.3 mol) of methyl isopropyl ketone are initially introduced, and dry hydrogen chloride is passed in at 10° C. until saturation. The mixture is stirred for 12 hours at 20°-25° C. and poured onto water, and the resulting mixture is neutralized by means of sodium carbonate. The neutralized mixture is extracted with methylene chloride and dried, and the methylene chloride is distilled off. 25.7 g (72.4% of theory) are obtained of 1-phenyl-3-chloro-4,4-dimethyl-1-hexen-5-one which has a melting point of 71° C.

Provenance & Evidence