Palladium-Catalyzed Decarboxylative Cross-Coupling of 1,3,4-Oxa­diazoles with Alkynoic Acids: A Simple Route for the Preparation of 2-Alkynylated 1,3,4-Oxadiazoles

Abstract

For the first time 2-alk-1-ynyl-5-(het)aryl-1,3,4-oxadiazole derivatives have been synthesized by the decarboxylative cross-coupling of alk-2-ynoic acids with 2-(het)aryl-1,3,4-oxadiazoles, employing palladium(II) chloride as the catalyst and silver(I) oxide as an oxidant with 1,3-bis(diphenylphosphanyl)propane as a ligand. Products were formed in high yields with no byproduct.

Keywords

alkynoic acids - 1,3,4-oxadiazole - palladium catalyst - alkynylation - cross-coupling - 1,3-bis(diphenylphosphanyl)propane

• References

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