Synthesis of 3,4-dihydropyrimidinones by the reaction between β-ketoesters, aromatic aldehydes and urea in the presence of pectin as a hetero polysaccharide catalyst

Pectin is a high-molecular-weight carbohydrate polymer which is present in virtually all plants where it contributes to the cell structure. Use of green and biodegradable catalyst in organic synthesis is undeniable. Easy access, inexpensive, natural and green catalysts are valuable. Herein, pectin was applied as a natural and hetero polysaccharide catalyst for the synthesis of 3,4-dihydropyrimidinone derivatives under suitable conditions. The most advantages of this research are: use of natural, green and biodegradable catalyst, easy work-up and high yields.