Tetrabutylammonium Hydrogen Sulfate mediated Three-Component Reaction for the Synthesis of Thiadiazolo [2,3-b] Quinazolin-6-(7H)-ones and Antioxidant Activity
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Add time:08/06/2019 Source:sciencedirect.com
A green, efficient procedure has been developed for the synthesis thiadiazolo[2,3-b]quinazolin-6-(7H)-one derivatives from a multicomponent one pot three molecule condensation of 2-amino-5-phenyl 1,3,4-thiadiazole, dimedone and tetrabutyl ammonium hydrogen sulfate (Bu4NHSO4) in water-ethanol with different substituted aromatic aldehydes were refluxed at 60°C. This protocol begins with high atom economy and lead to the formation of three rings containing one C-C, one C=N and two C-N bonds in single operation. The simplicity of enforcement, easily available substrate,scalability and good scores of environmental parameters for the binding synthetic route are more worthy and efficient of besides attention. Thiadiazoloquinazolin derivatives were screened for their potent antioxidant activity.
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