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Synthesis 2006(22): 3815-3818
DOI: 10.1055/s-2006-950302
DOI: 10.1055/s-2006-950302
PAPER
© Georg Thieme Verlag Stuttgart · New York
Spiroisoxazoline Synthesis via Intramolecular Cyclization/Methylation
Further Information
Received
23 June 2006
Publication Date:
09 October 2006 (online)
Publication History
Publication Date:
09 October 2006 (online)

Abstract
The synthesis of regioisomeric spiroisoxazolines was achieved through an intramolecular cyclization/methylation reaction of a functionalized 5,5-disubstituted isoxazoline in one reaction vessel. The 5,5-isoxazoline was constructed through a 1,3-dipolar cycloaddition reaction of an aromatic nitrile oxide and a geminal disubstituted alkene.
Key words
spiro compounds - regioselectivity - cycloadditions - ring closure - heterocycles
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References
COLOC NMR experiments for compounds 6 and 7 enabled the distinction between these compounds.