This work describes the nitric acid catalysed synthesis of wollastonite (CaSiO3) nanoparticles (NP) from tetraethyl orthosilicate and calcium nitrate tetrahydrate. The formed calcium silicate nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), Powder X-ray Diffraction (PXRD), and scanning electron microscopy (SEM) equipped with X-ray micro analysis. The CaSiO3 NPs showed an excellent yield (93%) towards the synthesis of quinolines via Friedlander reaction. The synthesized compound 3-dimethyl-7-nitro-9-phenyl-3,4-dihydroacridin-1(2H)-one was characterized by various spectroscopic techniques. © 2017 Taylor &amp; Francis Group, LLC.

Arunachalam V

Department of Micro and Nanoelectronics

School of Electronics Engineering

Vellore Campus

Vijayalakshmi U

Department of Chemistry

School of Advanced Sciences

Mohana Roopan S

Palaniraja J

Ghanem M.A

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Synthesis of calcium silicate nanoparticles and its catalytic application in Friedlander reaction

Inorganic and Nano-Metal Chemistry

In general, aryl-aryl transformations were investigated via transition metal-catalysed reactions. However, transition metal-mediated organic synthesis provided higher yields but has some flaws such as high cost, and the need for careful exclusion of air and moisture during the reactions. Possibly, there may be contamination of the product from traces of heavy metals present. To overcome these kinds of disadvantages, continuous efforts have been focused on the recent development of aryl-aryl formation through transition metal-free (TMF) reactions. However, most of these cross-couplings reaction were limited to hetero and electron-rich arenes which require strong inorganic bases. Our critical review includes a synthetic pathway to prepared X-aryl (X = C, N, O and S) motif by a transition metal-free scenario. Formerly, TMF reactions were carried out by various sources like strong bases, diazodium salt, aryliodonium salt, organo-catalysts and versatile energy sources like microwave heating, visible light and photochemical reactor. In this review, we have focused on the transition metal-free arylations. © 2014 Springer Science+Business Media Dordrecht.

Research on Chemical Intermediates

Synthetic journey towards transition metal-free arylations

We report an expeditious synthesis of selected indazolo-quinazolinone derivatives via an iodine-mediated multi-component reaction (MCR).

RSC Advances

Iodine-mediated synthesis of indazolo-quinazolinones via a multi-component reaction

An expedient method for the synthesis of 5,6-dihydrobenzo[h][1,2,4]triazolo[5,1-b]quinazolines by UV light has been developed.

UV-light induced domino type reactions: synthesis and photophysical properties of unreported nitrogen ring junction quinazolines

Green chemistry is playing an important role for synthesizing organic compounds, due to its eco-friendly nature and low cost. In green chemistry, metal nanoparticles exhibited some useful physical and chemical properties (catalytic activity). Due to its diverse properties, nanoparticles can be utilized as a catalyst in various organic reactions. Recent research has been directed towards the utilization of eco-friendly and bio-friendly plant materials in nanoparticles synthesis. In our present work, TiO2 nanoparticles (TiO2 NPs) were synthesized using Annona squamosa peel extract and their catalytic applications were studied on the 2,3-disubstituted dihydroquinazolin-4(1H)-one synthesis. Synthesized compounds were confirmed using FT-IR, 1H NMR, 13C NMR and GC-MS analyses. © 2013 Selvaraj Mohana Roopan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

Chinese Chemical Letters

Catalytic activity of TiO2 nanoparticles in the synthesis of some 2,3-disubstituted dihydroquinazolin-4(1H)-ones

A practical and metal free method for methylthiolation of imidazo[1,2-a]pyridines and other imidazo-fused heterocycles using DMSO-POCl3 complex is reported. The reactions are carried out at room temperature that give the corresponding methylthiolated products in good to excellent yield. Further, its application to indole has been demonstrated. © 2013 Published by Elsevier Ltd.

Journal	Inorganic and Nano-Metal Chemistry
Publisher	Informa UK Limited
ISSN	2470-1556
Open Access	No