Hydrochloric Acid → 2-(p-Biphenylyl)-2-penten-4-one

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Reaction Steps

To a solution of 10 g. of 2-(p-biphenylyl)-3,4-pentadien-2-ol in 200 ml. of anhydrous methanol is added 3 ml. of concentrated hydrochloric acid. The resulting mixture is stirred at room temperature for 3 hours and then in an ice bath for 2 hours. Solids form and are filtered off and recrystallized from pentane to obtain 2-(p-biphenylyl)-2-penten-4-one.

Provenance & Evidence