I₂/Nanostructured Pyrophosphate : A Mild and Efficient Catalyst for the Selective Protection of Carbonyl Compounds

Asmae Lemaanni, Asmae Snik, Karima Abdelouahdi, Abderrahim Solhy, Mohamed Zahouily

Centre National pour la Recherche Scientifique et Technique (CNRST), Division UATRS, Angle Allal Fassi/FAR, Hay Riad, Rabat, Morocco.
Laboratoire de Catalyse, Chimiométrie et Environnement, URAC 24, Faculté des Sciences et Techniques, Université Hassan II, Mohammedia, Morocco.
MAScIR Foundation, Institute of Nanomaterials & Nanotechnology, ENSET, Av. De l’Armé Royale, Rabat, Morocco.

DOI: 10.4236/mrc.2012.12003                

Abstract

A new solvent free method for protection of carbonyl compounds as their thioacetals has been accomplished through the use of iodine supported on nanostructured pyrophosphate. Advantages of the methodology include very short reaction time, the requirement for minimum amounts of catalyst, the remarkably simple experimental procedure, and no necessity for solvents or inert atmospheres, excellent yields and recyclability of the catalyst used. An efficient method for the chemoselective thioacetalization of ketones in the presence of aldehydes using I₂/nanostructured pyrophosphate is also reported in this article. The nanostructured pyrophosphate was characterized by scanning electron microscopy, X-ray diffraction, infrared spectroscopy, Transmission electron microscopy and thermal gravimetric analysis, respectively.

Keywords

Catalyst; Free Solvent; Nanostructured Pyrophosphate; Protection of Carbonyl Compounds; Iodine

Conflicts of Interest

The authors declare no conflicts of interest.

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