SnO nanoparticles as an efficient catalyst for the one-pot synthesis of chromeno[2,3-b]pyridines and 2-amino-3,5-dicyano-6-sulfanyl pyridines

Abstract

A flexible and highly efficient protocol for the synthesis of chromenopyridines and sulfanyl pyridines using nanoSnO has been developed.

Synthesis of new 2-amino-4H-pyran-3,5-dicarboxylate derivatives using nanocrystalline MIIZr4(PO4)6 ceramics as reusable and robust catalysts under microwave irradiation

“…Nanocatalysts are highly active since most of the particle surfaces can be available to catalysis because chemical reactions take place mainly on the surface of the particles. However, the activity of catalysts is influenced by the factors such as acid-base properties, geometric structure (particularly pore structure), size and morphology of the particles, the distribution of sites, and the polarity of the surface sites (Tanabe 1970;Safaei-Ghomi et al 2014). Theoretically, nanoscale heterogeneous catalysts should present higher surface areas, which are mainly responsible for their catalytic activity.…”

“…On the other hand, multicomponent reactions have become highly popular in the discovery of biologically active new compounds due to their quite simple experimentation, atom economic in nature, convergent, and are usually considered for the development of environmentally benign synthetic methods. Therefore, the design of new MCRs for the synthesis of diverse groups of compounds, especially the ones that are biologically active, has commanded enormous attention (Estévez et al 2010;Bhunia et al 2014;Abahmane et al 2011;Gawande et al 2012;Naeimi et al 2014;Safaei-Ghomi et al 2014;Wang et al 2009). The chemical synthesis productivity can be enhanced by nanosized catalysts because of small size and high surface to volume ratios.…”

ZrOCl2/nano TiO2 as an Efficient Catalyst for the One Pot Synthesis of Naphthopyranopyrimidines Under Solvent-free Conditions

“…Undoubtedly, the synthesis of naphthopyranopyrimidines through multicomponent reactions (MCRs) has been paid much attention due to excellent synthetic efficiency, inherent atom economy, procedural simplicity and environmental friendliness. [7][8][9][10][11] The eco-friendly, solvent-free multicomponent approach opens up numerous possibilities for environmentally clean synthesis which involves reduction or elimination of the use or generation of hazardous chemicals. [12][13] The possibility of performing multicomponent reactions under solvent-free conditions with a heterogeneous catalyst could improve their cost-effectiveness and ecological acceptability.…”

Nano crystalline ZnO catalyzed one pot three-component synthesis of 7-alkyl-6H,7H- naphtho[1',2':5,6]pyrano[3,2-c] chromen-6-ones under solvent-free conditions

“…MCRs often shorten reaction periods, giving higher chemical yields than multiple-step syntheses, and so can reduce the use of energy and operating cost [43][44].…”