Journal
GREEN CHEMISTRY LETTERS AND REVIEWS
Volume 11, Issue 2, Pages 78-85Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17518253.2018.1434564
Keywords
Isoxazoles; ultrasound irradiation; montmorillonite K10; heterogeneous catalyst; SnCl2
Funding
- Research Council of the University of Kashan [256722/21]
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Tin exchanged montmorillonite K10 (Sn-II-Mont K10) was prepared by ion exchange between SnCl2 and montmorillonite K10. The Sn-II-Mont K10 was characterized by X-ray diffraction, scanning electron microscope and energy-dispersive X-ray spectroscopy. The synthesized Sn-II-Mont K10 was used as a recoverable solid catalyst for synthesis of 3-methyl-4-arylmethylene isoxazole-5(4H)-ones via one-pot multicomponent cyclocondensation of hydroxylamine hydrochloride, ethyl acetoacetate and benzaldehyde derivatives in water under ultrasound irradiations. The yields of products were obtained 87-96%. The remarkable advantages of this method are a low-cost and eco-friendliness catalyst, rapid completion of the reactions, and avoidance of using organic solvents, excellent yield and mild conditions. [GRAPHICS] .
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