- DDQ-induced dehydrogenation of heterocycles for c-c double bond formation: Synthesis of 2-thiazoles and 2-oxazoles
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Strong as an Ox: 2-Thiazoles and 2-oxazoles are formed by oxidation of 2-thiazolines and 2-oxazolines without requiring substituents at the C4 and C5 positions. DDQ plays an important role as the oxidant in this transformation and metal is unnecessary. This general procedure shows good functional group tolerance and provides a wide variety of 2-thiazoles and 2-oxazoles in moderate to excellent yields.
- Li, Xiangnan,Li, Cheng,Yin, Bing,Li, Cong,Liu, Ping,Li, Jianli,Shi, Zhen
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p. 1408 - 1411
(2013/07/26)
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- SYNTHESIS, STRUCTURE, AND SPECTRAL PROPERTIES OF SOME BIOXAZOLES
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Syntheses of systems containing two oxazole rings from aldehydes obtained by formylating 2-phenyl-, 2-(2-furyl)-, and 2-(2-thienyl)oxazole have been developed.Terephthalate and thiophen-2,5-dicarboxylate esters have been used to obtain 2,2'-(1,4-phenylene)- and 2,2'-(2,5-thienylene)bisoxazoles.The PMR, UV, and luminescence spectra of these systems have been examined, and quantum chemical calculations carried out in the PPP approximation.
- Belen'kii, L. I.,Cheskis, M. A.,Zvolinskii, V. P.,Obukhov, A. E.
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p. 654 - 663
(2007/10/02)
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