Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5221405 | Tetrahedron | 2010 | 7 Pages |
Abstract
The synthesis of 4-isoxazolines via 1,3-dipolar cycloaddition of nitrones generated from allenoates and the subsequent thermal rearrangement to pyrroles is reported. The selection of the reaction conditions allowed the isolation of the initial 1,3-dipolar cycloadducts, the 4-isoxazolines, or the pyrrole derivatives. The isomerization of the parent system (4-isoxazoline) was examined by carrying out quantum chemical calculations and corroborated the favourability of the 4-isoxazoline rearrangement to five-membered heterocycles via 2-acylaziridine intermediates.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Susana M.M. Lopes, Cláudio M. Nunes, Teresa M.V.D. Pinho e Melo,