Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5276687 | Tetrahedron Letters | 2011 | 5 Pages |
Abstract
A new type of ring-ring isomerism, which consists of the reversible transformation of cyclobutane derivatives into substituted 1,2-oxazine N-oxides was found and studied by NMR spectroscopy and X-ray diffraction analysis. The starting materials were prepared by the stereoselective reaction of α-(trifluoroethylidene)nitroalkanes, which react with ethyl β-morpholino- and β-piperidinocrotonates at the more nucleophilic α-position, whereas the reaction of α-(trichloroethylidene)nitroalkanes proceeds at the β-methyl group to give the corresponding linear products.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Vladislav Yu. Korotaev, Alexey Yu. Barkov, Pavel A. Slepukhin, Mikhail I. Kodess, Vyacheslav Ya. Sosnovskikh,