Zirconia Supported on Rice Husk Silica from Biowaste: A Novel, Efficient, and Recoverable Nanocatalyst for the Green Synthesis of Tetrahydro-1-benzopyrans
heterogeneous reusable catalyst; multicomponent reactions (MCR); rice husk silica-supported zirconia; tetrahydro-1-benzopyrans
Abstract: Zirconia supported silica from rice husk (an agricultural waste) has been utilized as a novel and efficient heterogeneous catalyst for the synthesis of bioactive tetrahydro-1-benzopyran derivatives via multicomponent condensation of various aldehydes with dimedone and malononitrile. This protocol offers various advantages such as high yields, simple experimental work-up procedure, short reaction time, no by-products, economic availability, easy purification, and reusability of the catalyst. 2020, Pleiades Publishing, Ltd.
Mishra M.; Devi K.R.S.; Pinheiro D.; Nizam A.
Russian Journal of Organic Chemistry, Vol-56, No. 10, pp. 1784-1789.
https://doi.org/10.1134/S107042802010019X https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096616261&doi=10.1134%2fS107042802010019X&partnerID=40&md5=bdbf347f4b52f98bbdc7a6cabb531d61
Mishra M., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India; Devi K.R.S., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India; Pinheiro D., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India; Nizam A., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India