Highly sustainable, economical, and faster Biginelli reaction has been established using concentrated solar radiation.

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An efficient, clean, and environmentally benign approach for the synthesis of 3-methyl-4-arylmethylene isoxazole-5(4H)-ones has been developed using concentrated solar radiations (CSR). One pot, multicomponent synthesis from aromatic / heteroaromatic aldehydes, ethyl acetoacetate and hydroxylamine hydrochloride leads to title compounds in high yields. Notably the reaction has been carried out in under solvent and catalystfree conditions within a very short time (3 min). Further, the reaction was scaled up to 50 mmol. The present method is also energy efficient and saves almost more than 87 % of energy as compared to the conventional method.

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