A new route to the synthesis of isoxazoline derivatives from dihydropyran via cycloaddition reaction in ionic liquid
作者:Bhaskar Chakraborty、Chiran Devi Sharma
DOI:10.1016/j.tetlet.2013.07.159
日期:2013.10
A new approach to the synthesis and 1,3-dipolar cycloadditions of nitrones has been described from 2,3-dihydro-4H-pyran and various hydroxylamines, with electron-deficient alkynes for the synthesis of isoxazoline derivatives. Significant rate acceleration and improved yields of exclusively exo isoxazolines in 1-butyl-3-methylimidazolium based ionic liquids have been observed. Novel isoxazolines may
已经描述了由2,3-二氢-4 H-吡喃和各种羟胺与电子不足的炔烃合成异恶唑啉衍生物的新的合成和1,3-偶极环加成硝基的新方法。显著速率加速和改善的产率仅仅外切在1-丁基-3-甲基咪唑鎓类离子液体异恶唑啉已经观察到。新型异恶唑啉可用作合成各种肽的前体。