cheminform abstract: oxidative aromatization of 3,5-disubstituted 2-isoxazolines by nitric oxide

2008 Isoxazole derivatives R 0240 Oxidative Aromatization of 3,5-Disubstituted 2-Isoxazolines by Nitric Oxide. — Disubstituted isoxazoles are obtained by oxidation of the corresponding isoxazolines (I) with nitric oxide. No reaction is observed for substrate (Ie) bearing an aliphatic sub- stituent R 2 . In contrast, aromatization is accomplished when R 1 is aliphatic [cf. (IId)]. Substrates bearing a p-methoxyphenyl group undergo both aromatization and nitration [cf.(IV)]. — (LI, R.; WU, W. T.; WU, G. L.; FAN, Y.; WU*, L. M.; Chin. Chem. Lett. 18 (2007) 7, 788-790; State Key Lab. Appl. Org. Chem., Lanzhou Univ., Lanzhou, Gansu 730000, Peop. Rep. China; Eng.) — S. Adam 18- 119

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Page 1: ChemInform Abstract: Oxidative Aromatization of 3,5-Disubstituted 2-Isoxazolines by Nitric Oxide

2008

Isoxazole derivativesR 0240 Oxidative Aromatization of 3,5-Disubstituted 2-Isoxazolines by Nitric Oxide. —

Disubstituted isoxazoles are obtained by oxidation of the corresponding isoxazolines (I) with nitric oxide. No reaction is observed for substrate (Ie) bearing an aliphatic sub-stituent R2. In contrast, aromatization is accomplished when R1 is aliphatic [cf. (IId)]. Substrates bearing a p-methoxyphenyl group undergo both aromatization and nitration [cf.(IV)]. — (LI, R.; WU, W. T.; WU, G. L.; FAN, Y.; WU*, L. M.; Chin. Chem. Lett. 18 (2007) 7, 788-790; State Key Lab. Appl. Org. Chem., Lanzhou Univ., Lanzhou, Gansu 730000, Peop. Rep. China; Eng.) — S. Adam

18- 119

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