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Relevant academic research and scientific papers

Preparation and application of highly efficient and reusable TBAPIL@Si(CH2)3@nano-silica-based nano-catalyst for preparation of benzoxanthene derivatives

Tetrabutylammonium prolinate ionic liquid (TBAPIL) was prepared, and mesoporous silica nanoparticles (NPs) were synthesized. Both of these were linked through propyltriethoxysilane to prepare a reusable catalyst TBAPIL@Si(CH2)3@silica NPs (TBAPILS). The formation of TBAPIL was checked through Fourier-transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (NMR) analysis. X-ray diffraction analysis confirmed the structure of silica NPs and linking of TBPAIL on it. Transmission electron microscopy proved the flourishing development of silica NPs. Scanning electron microscopy graphs exposed the altering in morphology of silica NPs and TBAPILS. FT-IR analysis also confirmed the formation of TBAPILS catalyst. Moreover, the effectiveness of the TBAPILS was also checked for the synthesis of various derivatives of tetrahydrobenzoxanthenes-11-ones. The formation and structure of obtained compounds were confirmed by FT-IR, elemental analysis, 1HNMR and 13C NMR spectral analysis. The catalyst TBAPILS was found to be used successfully up to five cycles without significant loss of activity.

An efficient one-pot synthesis of tetrahydrobenzo xanthen-11-one derivatives catalyzed by P2O5 under solvent free conditions

The present study highlights the catalytic activity of P2O5 for the one pot synthesis of tetrahydrobenzoxanthen-11-one derivatives from dimedone and various aromatic aldehydes under solvent free conditions. The present methodology offers several advantage

New nano-Fe3O4-supported Lewis acidic ionic liquid as a highly effective and recyclable catalyst for the preparation of benzoxanthenes and pyrroles under solvent-free sonication

A novel magnetic nanomaterial-immobilized Lewis acidic ionic liquid was successfully synthesized by the covalent embedding of 3-(3-(trimethoxysilyl)propyl)-1H-imidazol-3-ium chlorozincate (ii) ionic liquid to the surface of Fe3O4 nanoparticles. The material was then characterized by FT-IR, SEM, TEM, TGA, ICP-OES, Raman, and EDS. Its performance as a new-generation Lewis acidic catalyst was also examined on the ultrasound-mediated synthesis of benzoxanthenes and pyrroles. Upon completion, the catalyst was simply recovered by an external magnet for multiple reuses without significant lessening of catalytic performance.

Facile synthesis of tetrahydrobenzoxanthenones via a one-pot three-component reaction using an eco-friendly and magnetized biopolymer chitosan-based heterogeneous nanocatalyst

A chitosan-based magnetic nanocomposite was synthesized by an eco-friendly and simple procedure, and was characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy.

Metal free synthesis of tetrahydrobenzo[: A] xanthenes using orange peel as a natural and low cost efficient heterogeneous catalyst

In this work, a facile, efficient and metal free catalytic system has been developed for the synthesis of tetrahydrobenzo[a]xanthene derivatives via a one-pot three-component condensation of various aldehydes, 2-naphthol, and dimedone. For the first time,

Formation of benzoxanthenones and benzochromenones via cerium-impregnated- MCM-41 catalyzed, solvent-free, three-component reaction and their biological evaluation as anti-microbial agents

We report here, three-component condensation reaction of naphthols, aldehydes and 1,3-dicarbonyl compounds catalyzed by Ce-MCM-41 under solvent-free conditions. Several advantages can be perceived using this eco-friendly protocol such as, a green and cost

Citric acid as a mild and inexpensive organocatalyst for synthesis of tetrahydrobenzo[a] xanthen-11-ones and dibenzo[a,j] xanthenes under solvent-free condition

A simple and efficient protocol has been developed for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a] xanthen-11-one derivatives, I employing a one-pot three-component reaction of aldehydes, 2-naphthol and dimedone in the presence of citric acid un

Alum-catalyzed domino synthesis of 12-substituted-8,9,10,12-tetrahydrobenzoxanthen-11-ones under solvent-free conditions

Alum is found to catalyze efficiently the one-pot, three-component condensation of aldehydes, α/β-naphthol, and dimedone to afford various 12-substituted-8,9,10,12-tetrahydrobenzoxanthen-11-ones in excellent yields. The use of alum catalyst and the solven

Ammonium oxalate as an efficient catalyst for one-pot synthesis of tetrahydrobenzo [a]xanthen-11-one derivatives under solvent-free conditions

A simple and efficient procedure for the synthesis of 12-aryl- or 12-alkyl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives has been developed via one-pot three-component reaction of 2-naphthol, aldehydes, and dimedone in the presence of ammonium ox

A multicomponent, solvent-free, one-pot synthesis of benzoxanthenones catalyzed by HY zeolite: Their anti-microbial and cell imaging studies

An atom-economical, multicomponent condensation of naphthols, aldehydes, and cyclic 1,3-dicarbonyl compounds catalyzed by HY zeolites under solvent-free conditions is reported. This ecofriendly protocol offers several advantages such as a green and cost-e