【文章名】Trimethylsilyl trifluoromethanesulfonate mediated addition-cyclization of N-vinyloxazolidin-2-ones to nitrones: an efficient access to 4-substituted 5-azaisoxazolidines.
Trimethylsilyl trifluoromethanesulfonate mediated addition-cyclization of N-vinyloxazolidin-2-ones to nitrones: an efficient access to 4-substituted 5-azaisoxazolidines.
[摘要]：Me3SiO3SCF3 (TMSOTf) was conveniently used to promote the reaction involving N-alkenyloxazolidin-2-ones and activated nitrones, leading to new 4-substituted N-isoxazolidin-5-yl-2-oxazolidinones in good to excellent yields. This TMSOTf-promoted procedure expanded the scope of reaction of N-vinyloxazolidin-2-ones and nitrones in a complementary way to the corresponding classical 1,3-dipolar cycloaddn. Some of these adducts could not be obtained under thermal activation.
