Abstract

AbstractA metal‐free regioselective synthesis of α‐aryl ketone from corresponding bromohydrin via cooperative cascade effect of [hmim]Br and tetrabutylammonium fluoride under microwave irradiation is reported. Applications of the protocol are illustrated by synthesis of drug intermediates piperonyl‐methyl ketone and 2‐tetralone. Interestingly, direct regioselective transformation of epoxide and 1,2‐diol into α‐aryl ketone under neat [hmim]Br has also been realized. Advantages of this method are demonstrated through the recyclability of [hmim]Br‐tetrabutylammonium fluoride catalytic system and gram scalability.

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