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

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.