Synthesis 2006(22): 3815-3818  
DOI: 10.1055/s-2006-950302
PAPER
© Georg Thieme Verlag Stuttgart · New York

Spiroisoxazoline Synthesis via Intramolecular Cyclization/Methylation

Jianping Xu, Jun Wang, Erick D. Ellis, II Ashton T. Hamme *
Department of Chemistry, Jackson State University, Jackson, MS 39217, USA
Fax: +1(601)9793674; e-Mail: ashton.t.hamme@jsums.edu;
Further Information

Publication History

Received 23 June 2006
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.

15

COLOC NMR experiments for compounds 6 and 7 enabled the distinction between these compounds.