FeBr3 – CD Complexes As Efficient and Chemoselective Catalyst for Sulfoxidation Reactions

L.I. ROSSI*; R. HOYOS DE ROSSI

APPLIED CATALYSIS A-GENERAL

Elsevier

Año: 2004 vol. 267 p. 267 - 272

0926-860X

Complexes of FeBr3 with
-cyclodextrin (
-CD-Fe), hydroxypropyl--cyclodextrin (HPCD-Fe) and -cyclodextrin (-CD-Fe) were prepared from the interaction of the salt dissolved in CH2Cl2 and solid cyclodextrins, and analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%). (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%). prepared from the interaction of the salt dissolved in CH2Cl2 and solid cyclodextrins, and analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%). (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%). 3 with
-cyclodextrin (
-CD-Fe), hydroxypropyl--cyclodextrin (HPCD-Fe) and -cyclodextrin (-CD-Fe) were prepared from the interaction of the salt dissolved in CH2Cl2 and solid cyclodextrins, and analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%). (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%). 2Cl2 and solid cyclodextrins, and analyzed by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis. These complexes were used as catalysts in the oxidation reactions of sulfides to sulfoxides giving good yields and a high chemoselectivity. The solid complexes can be used several times and in the case of the -CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%).-CD-Fe complex after five cycles the yield decreased only 5% (from 85 to 80%).