Solvent-free, [Et₃NH][HSO₄] catalyzed facile synthesis of hydrazone derivatives

Abstract

Eco-friendly and efficient synthesis of hydrazone derivatives.

Silica Bonded N-(Propylcarbamoyl)sulfamic acid (SBPCSA) Mediated Expeditious Approach to C–C Bond Formation: An Innovative Pathway for Acrylonitrile Derivatives

“…Initially, we focused our study to probe the optimized reaction conditions for the present protocol regarding the choice of solvent, amount of catalyst, temperature of reaction and investigating efficiency of various catalyst on a selected model reaction using 3-nitrobenzaldehyde (1f) and 2-thiopheneacetonitrile (2) in the presence of SBPCSA to establish the best possible reaction conditions for the synthesis of acrylonitrile 3f. …”

“…In the last few decades, there has been an upsurge usage for environmentally benign and sustainable catalyst in the chemical industry [1,2]. Recycling of homogeneous catalysts is the main issue in large-scale production of chemicals [3].…”

Silica‐supported Solvent Approaches More Facile than the Conventional for Erlenmeyer Synthesis with Our Pyridinium Salts

“…Parveen et al . reported the preparation of azalactone and its derivatives from various aryl aldehydes and hippuric acid in the presence of higher concentration (20% mol) of ILs at 100°C to give quantitative yield . Azalactone and its derivatives were derived from required reactants in the presence of [Et 3 NH][HSO 4 ] for 15–140 min to afford from moderate to quantitative yield.…”

“…Parveen et al . employed to prepare their target molecules and used special reaction setup; unfortunately, they received only moderate yield .…”

“…Overview of reported versus this work synthetic routes (A, B, and C vs. D) for the synthesis of (4 E )‐4‐benzylidene‐2‐(4‐nitrophenyl)oxazol‐5(4 H )‐one. [Color figure can be viewed at wileyonlinelibrary.com]…”