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2004
Oxadiazole derivatives
R 0290
Thermal Transformation of Arylamidoximes in the Presence of Phosphorus
Unexpected Formation of 3-Aryl-5-arylamino-1,2,4-oxadiazoles. — Ther51- 101 Ylides.
mal reaction of arylamidoximes (I) with phosphorus ylide Ph3P=CH-COOEt results in
the unexpected formation of oxadiazoles (II). Furoxans, nitriles and ureas are also isolated suggesting aryl cyanide as intermediates. Scope and mechanism of the reaction
are studied. — (NICOLAIDES*, D. N.; LITINAS, K. E.; VRASIDAS, I.;
FYLAKTAKIDOU, K. C.; J. Heterocycl. Chem. 41 (2004) 4, 499-503; Lab. Org.
Chem., Dep. Chem., Aristotle Univ. Thessaloniki, GR-54124 Thessaloniki, Greece;
Eng.) — R. Staver
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