Draw the products of acid- and base-catalyzed bromination of acetylcyclopentane. Indicate the major product. Reason your answer.

SOLUTION:

halogenation-ketone-acid

Mechanism:

Stage 1. Formation of the enol

halogenation-ketone-acid-mechanism-01

Stage 2. Attack of the enol on the bromine molecule

halogenation-ketone-acid-mechanism-02

In basic media, methyl ketone produces the bromoform reaction.

halogenation-methyl-ketone-basic

The mechanism of this last reaction can be found at the address: http://www.quimicaorganica.org/enolatos-y-enoles/247-reaccion-del-haloformo-iodoformo.html