Cu-Fe spinels promoted the Ferrier rearrangement of 2-nitroglycals with several
O-nucleophiles. 2,3-Unsaturated carbohydrate derivatives were prepared by the reaction of 3,4,6-tri-Oacetyl-
2-nitroglucal and alcohols in the presence of 5 % of CuFe2O4. After separation of the catalyst with
an external magnet, the reaction products were obtained in good yields and high stereo and regioselectivity.
Also, S- and heterocyclic C-3 substituted 2-nitro-endo-glycals could be prepared by this method.
Keywords: 2-Nitroglycals, Cu-Fe spinels, Ferrier rearrangement, magnetically recoverable catalyst, unsaturated heterocycle,
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