Synthesis of stable isoxazolines by [3+2] cycloaddition of oxaziridines with alkynes
作者:Marilena Fabio、Ludovico Ronzini、Luigino Troisi
DOI:10.1016/j.tet.2008.03.092
日期:2008.5
N-Alkyl substituted oxaziridines undergo a [3+2] cycloaddition reaction with a variety of terminal alkynes to give the product isoxazolines, whose stability appears to depend on the electronic properties of the groups on the C-3 and C-5 positions. The presence of an electron withdrawing group on C-5 and/or an electron donating group on C-3 causes isomerization of the isoxazolines to β-amino enones