A simple, metal and ligand-free protocol for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones derivatives using choline hydroxide (ChOH) as an effective catalyst in an aqueous medium has been developed. The good to high yield of the desired product is obtained, with low environmental factor and high atom economy. The ChOH was found to be recyclable up to six consecutive runs without significant loss in its activity. The use of water as an environmentally benign solvent, ease of work up and efficient recyclability of the catalyst makes this process more advantageous and greener.

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Novel boron fluorine complex molecules were designed and synthesized using the maleimide core moiety. Significant features such as a large Stoke shift, high quantum yield, and long range absorption and emission wavelengths were observed for these molecules. The lower LUMO level of these molecules indicates their potential application as electron transport materials. The optical band gap was calculated and compared by using UV-absorption edge, density functional theory and electrochemical studies, revealing the charge transfer characteristics.

Transamidation catalysed by magnetically separable Fe3O4 nano catalyst under solvent-free condition.