Journal of Heterocyclic Chemistry

Convenient One??Pot Synthesis of 2, 5??Disubstituted Oxazoles via a Catalytic Oxidative Dehydrogenation of F3CSO3H· SiO2??DDQ/CuCl2/LiCl

S Yuan, Z Li, L Xu

Index: Yuan, Shizhen; Li, Zhen; Xu, Ling Journal of Heterocyclic Chemistry, 2013 , vol. 50, # 6 p. 1405 - 1409

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Abstract

Abstract A facile one-pot synthesis of 2, 5-disubstituted oxazoles was developed via cyclization of aldoximes and phenylacetylene then dehydrogenation oxidation. 2, 3-dichloro- 5, 6-dicyano-1, 4-benzoquinone was studied for the selective oxidation of oxazolines using Cu 2+/Li+ as catalyst and O 2 as indirect oxidant. The reaction results showed that this catalyst system can effectively catalyze the oxidation of oxazolines to the corresponding ...