A facile approach to synthesize 3,5-disubstituted-1,2,4-oxadiazoles via copper-catalyzed-cascade annulation of amidines and methylarenes.

Various 3,5-disubstituted-1,2,4-oxadiazoles are smoothly formed via copper-catalyzed cascade annulation of amidines and methylarenes. This tandem oxidation-amination-cyclization transformation represents a straightforward protocol to prepare 1,2,4-oxadiazoles from easily available starting materials, with inexpensive copper catalysts and green oxidants. It has the advantages of atom- and step-economy, good functional group tolerance, as well as operational simplicity.

Citation

Wei Guo, Kunbo Huang, Fanghua Ji, Wanqing Wu, Huanfeng Jiang. A facile approach to synthesize 3,5-disubstituted-1,2,4-oxadiazoles via copper-catalyzed-cascade annulation of amidines and methylarenes. Chemical communications (Cambridge, England). 2015 May 25;51(42):8857-60

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PMID: 25921074

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