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چکیده
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Carbon-based materials have long been used in heterogeneous catalysis reactions due to their desired properties for catalyst support and carbon-based materials act as direct catalysts in many industrial applications. Along with the use of biochar, researchers have currently devised various modification approaches to further expand its activation capacities [1]. Certain catalytic reactions require strong acid sites. To this end, biochar was sulfonated (i.e., introducing a sulfonate group (–SO3H) onto biochar) using a simple and efficient procedure [2]. 3,4-dihydropyrimidin-2(1H)-ones and their derivatives have an important role in synthetic organic chemistry and natural products due to their extensive range of biological and pharmacological properties[3]. Here in an environmentally benign Biginelli synthesis of 3,4- dihydropyrimidine-2(1H)-ones by one-pot three-component reaction of aromatic aldehydes, ethylacetoacetate and urea in the presence of sulfonated biochar as recyclable nanocatalyst have been reported.
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