Bi(III) halides as efficient catalysts for the O-acylative cleavage of tetrahydrofurans: an expeditious entry to tetralins

The utility of the mild (DCM/20 °C), high yielding, regioselective, O-acylative cleavage of tetrahydrofurans using organic acid halides and catalytic Bi(III) halides is illustrated with the preparation of a tetralin.