Author/Authors :
Alizadeh، Abdolhamid نويسنده Department of Organic Chemistry, Faculty of Chemistry and Nanoscience& Nanotechnology Research Center (NNRC), Razi University, Kermanshah, 67149 Iran , , Khodaei، Mohamad Mehdi نويسنده Department of Organic Chemistry, Faculty of Chemistry and Nanoscience& Nanotechnology Research Center (NNRC), Razi University, Kermanshah, 67149 Iran , , Abdi، Gisya نويسنده Faculty of Chemistry, Department of Organic Chemistry, Razi University, Kermanshah 67149, Iran , , Ghouzivand، Sohrab نويسنده Department of Organic Chemistry, Faculty of Chemistry and Nanoscience& Nanotechnology Research Center (NNRC), Razi University, Kermanshah, 67149 Iran. , , Fakhari، Mitra نويسنده Department of Organic Chemistry, Faculty of Chemistry and Nanoscience& Nanotechnology Research Center (NNRC), Razi University, Kermanshah, 67149 Iran. , , Beygzadeh، Mojtaba نويسنده Department of Organic Chemistry, Faculty of Chemistry and Nanoscience& Nanotechnology Research Center (NNRC), Razi University, Kermanshah, 67149 Iran. , , Fallah، Amir Hossein نويسنده IbnuSina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM, Johor Baharu, Johor, Malaysia ,
Abstract :
An organosuperbase (N,N-dimethylbiguanide) immobilized on mesoporous and magnetically separable silica supports, was found for the first time, to act as a highly-stable, scalable and efficient heterogeneous catalyst for the Henry reaction under mild and neutral condition. Several factors such as catalyst amount, solvent and reaction time concerning the reactivity were also discussed. The procedure constitutes the first immobilized biguanide promotion of selective synthesis of B-nitroalcohols without addition of stoichiometric amount of any base and showed a broad substrate scope. The uniqueness of this catalyst lay in its cleanness, cost-effectiveness, ease in removal at the end of reaction, and chemoselective formation of a wide range of B-nitroalcohols. These materials can be easily converted to other useful synthetic intermediates which many of them have been exemplified in synthetic organic chemistry and pharmaceutical industry.
