Abstract
Development of green solvents from renewable resources has gained much attention recently, because of the extensive uses of solvents in almost all of the chemical industry and the predicted disappearance of fossil oil. Here we show that glycerol and PS-PEGOSO3H as a green and recyclable catalyst system were used in the multicomponent reactions for the synthesis of 3,4-dihydropyrimidinones, amidoalkyl naphthols, and dibenzoxanthenes, respectively. Excellent products yields and good recyclability of catalyst and glycerol were achieved. It demonstrates that glycerol is a renewable and recyclable green solvent that is nontoxic, biodegradable, and able to dissolve organic substrates. It was easy to isolate the reaction products by simple extraction.
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