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Efficient synthesis of novel8,8-dimethyl-2-(4-nitrophenyl)-5-phenyl-5,7,8,9-tetrahydro-6h-(1,3,4)thiadiazolo(2,3-b)quinazolin-6-one catalyzed by zrocl2

Author: 
Siva Shankar Reddy Sabbela and Shaik Lakshman
Subject Area: 
Life Sciences
Abstract: 

In this investigation, a new Lewis acid-based was synthesis of novel series of 8,8-dimethyl-2-(4-nitrophenyl)-5-phenyl-5,7,8,9-tetrahydro-6H-(1,3,4)thiadiazolo(2,3-b)quinazolin-6-one promoted by camphorsulfonic acid . The catalytic ability of camphorsulfonic acid was ascertained in the efficient synthesis of a novel array of thiadiazolo (2,3-b) quinazolin-6-one scaffolds via a one-pot three-component reaction of dimedone, substituted aromatic aldehydes, and 5-(4-nitrophenyl)-1, 3, 4-thiadiazol-2-amine under solvent ethanol conditions. This intermediate such as 5-(4-nitrophenyl)-1, 3, 4-thiadiazol-2-amine is one of the three component of this process which is nitrogen sources .This component can be obtained from 4-nitrobenzoic acid and semithiocarbazide in the presence of ethanol and con H2SO4 at reflux and among the several notable benefits of this recently established technology are its low E-factor, high reaction mass efficiency, atom economy, scalability, short reaction time, avoidance of hazardous organic solvents, and ease of enforcement.

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