Synthesis and FT-IR, SEM, EDS Studies of Heterogeneous Catalyst- CaCl2.2H2O Supported on Rice Husk: A Highly Efficient and Economical Catalyst for N-Formylation of Amines at Room Temperature
Deepali Agarwal *
Department of Chemistry, College of Basic Sciences and Humanities, G. B. Pant University of Agriculture and Technology, Pantnagar 263 145, Uttarakhand, India.
Virendra Kumar Kasana
Department of Chemistry, College of Basic Sciences and Humanities, G. B. Pant University of Agriculture and Technology, Pantnagar 263 145, Uttarakhand, India.
*Author to whom correspondence should be addressed.
Abstract
A heterogeneous catalyst, rice husk supported calcium chloride dihydrate (RiH-CaCl2.2H2O), has been developed and characterized using energy dispersive spectroscopy (EDS), fourier transform infra-red (FT-IR) spectroscopy and scanning electron microscopy (SEM). RiH-CaCl2.2H2O offers simple, efficient and economical solid support synthetic protocol for the synthesis of formamides under solventless condition at room temperature to afford the formamide derivatives. The ability of RiH-CaCl2.2H2O to enhance the reaction rate is described in terms of preorganizing effect. This method provides green approach for N-formylation and easy isolation process. The method is superior over the existing methods as it utilizes methanolic acid in lesser amount and works well at room temperature.
Keywords: Rice husk, RiH-CaCl2.2H2O, solid support, formamides, preorganizing effect, green approach.