A new synthesis of symmetrical 2,5-disub
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Fouad Bentiss; Michel Lagrenée
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Article
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1999
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Journal of Heterocyclic Chemistry
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English
⚖ 182 KB
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## Abstract Several new 2,5‐disubstituted 1,3,4‐oxadiazoles have been synthesized in good yields by reaction of aromatic acids with hydrazine dihydrochloride in a mixture of orthophosphoric acid, phosphorus pentoxide and, in general, with addition of phosphorus oxychloride to the reaction mixture.