Abstract
ABSTRACTA sustainable combinatorial synthesis of densely substituted pyrimido [1,2-b] benzazole derivatives in water under microwave irradiation was performed using a new lignocellulose-based bio nanocomposite (BNC) as heterogeneous catalyst. The lignocellulosic waste peanut shells (LCWPS) were turned into a value-added product, a new BNC PS/ZnO, which was prepared via in situ hydrothermal synthesis. The as-prepared BNC was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction spectrum. PS/ZnO has been successfully used in a sustainable catalytic method for the synthesis of pyrimido [1, 2-b] benzazole derivatives in water under microwave irradiation. The time of this reaction was significantly reduced. This catalytic system has a very high turnover number (TON ∼ 103) and turnover frequency (TOF ∼ 105 h−1). This paper presents the benefit of sustainable management of LCWPS, a bio-sourced polymeric carbohydrate for production of new nanocatalyst.
Highlights
Peanut shells (PS), an agro-industrial waste constitute a considerable part of biodegradable lignocellulosic waste (LCW) [1]
The as-prepared bio nanocomposite (BNC) was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction spectrum
This paper presents the benefit of sustainable management of lignocellulosic waste peanut shells (LCWPS), a bio-sourced polymeric carbohydrate for production of new nanocatalyst
Summary
Peanut shells (PS), an agro-industrial waste constitute a considerable part of biodegradable lignocellulosic waste (LCW) [1]. A sustainable combinatorial synthesis of densely substituted pyrimido [1,2-b] benzazole derivatives in water under microwave irradiation was performed using a new lignocellulose-based bio nanocomposite (BNC) as heterogeneous catalyst.
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