Ring Expansion of 2-Alkylidenedihydroqui
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Helmut Quast; Svetlana Ivanova; Eva-Maria Peters; Karl Peters
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Article
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2000
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John Wiley and Sons
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English
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2-Alkyl-1-methylquinolinium hexafluorophosphates 1 are deprotonated by sodium or potassium hydride to afford solutions of 2-alkylidenedihydroquinolines 2, which are investigated by NMR spectroscopy. 1,3-Dipolar cycloaddition of phenyl azide to 2 yields the spirocyclic products 10. While, at 80ฯช110 ยฐ