作者:Susana M.M. Lopes、Cláudio M. Nunes、Teresa M.V.D. Pinho e Melo
DOI:10.1016/j.tet.2010.06.010
日期:2010.8
The synthesis of 4-isoxazolines via 1,3-dipolarcycloaddition 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