Visible-light-promoted aerobic oxidative cyclization to access 1,3,4-oxadiazoles from aldehydes and acylhydrazides |
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| Authors: | Arvind K Yadav Lal Dhar S Yadav |
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| Institution: | Green Synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad 211002, India |
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| Abstract: | A novel and practical access to symmetrical and unsymmetrical 2,5-disubstituted 1,3,4-oxadiazoles directly from aldehydes and acylhydrazides using visible light irradiation under an air atmosphere in the presence of eosin Y as an organophotoredox catalyst at rt is reported. This is the first example of oxidative cyclization of acylhydrazones employing air and visible light as inexpensive, readily available, non-toxic, and sustainable reagents. |
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| Keywords: | Aerobic oxidation Acylhydrazones Eosin Y Oxadiazoles Photoredox catalysis Visible light |
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