REDUCTION PAR LES SELS CHROMEUX DE BROMURES BENZYLIQUES ORTHO-O-ACYLES AVEC TRANSPOSITION DU GROUPEMENT ACYLE DE L'ESTER: ACCES AUX ORTHO-HYDROXYBENZYL CETONES NON MASQUEES ET UNE NOUVELLE PREPARATION DE BENZO(B)FURANNES SUBSTITUES EN POSITION-2

Article abstract of DOI:10.1016/S0040-4020(01)87790-5

The ?-bonded organochromium (III) complexes resulting from the reduction of ortho-O-acyl benzylic bromides 1 with CrCl2 undergo an 1,5-transposition of the ester acyl functional group which allows, through selected experimental conditions either a selective access to the unmasked ortho-hydroxybenzyl ketones 2 or a new preparation of the 2-substituted benzofurans 3.The scope and limitations of the method are presented.