Novel isoxazolines and isoxazoles of N-substituted saccharin derivatives are synthesized in good yields by 1,3-dipolar cycloaddition of N-allyl or propargyl N-substituted saccharin with arylnitrile oxide under solvent-free microwave irradiation. In this process, the yields were significantly improved over conventional heating, without alteration of the selectivity. The regioselectivity as well as the
在无溶剂微波辐射下,通过N-烯丙基或炔丙基N-取代
糖精的1,3-偶极环加成与芳基腈氧化物以高收率合成新型N-取代
糖精衍
生物的
异恶唑啉和
异恶唑。在此过程中,收率比常规加热有显着提高,而选择性没有改变。讨论了区域选择性以及非热比微波效应。