Carbon-13 NMR Studies of 3-Aryl-4-(5-aryl-Δ 2-1,2,4-oxadiazolin-3-yl)sydnones and 3-Aryl-4-(5-aryl-1,2,4-oxadiazol-3-yl)sydnones |
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Authors: | Sun Ma Chin-Lin Huang Mou-Yung Yeh |
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Abstract: | The 13C NMR spectra of twelve 3-aryl-4-(5-aryl-Δ2-l,2,4-oxadiazolin-3-yl)sydnones and twelve 3-aryl-4-(5-aryl-l,2,4-oxadiazol-3-yl)sydnones have been measured and assigned by means of proton-noise decoupling and DEPT-experiments. The coupling constants were determined by means of gated decoupling, and NOE effects were observed by comparison of proton-decoupled and inverse-gated decoupled spectra. Differences shown by the oxadiazoline and the oxadiazole rings and the substitution effects are discussed. |
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Keywords: | 13C NMR spectroscopy 3-Aryl-4-(5-aryl-Δ 2-1,2,4-oxadiazolin-3-yl)sydnones 3-Aryl-4-(5-aryl-l,2,4-oxadiazol-3-yl)sydnones |
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