PhIO promoted synthesis of nitrile imines and nitrile oxides within a micellar core in aqueous media: a regiocontrolled approach to synthesizing densely functionalized pyrazole and isoxazoline derivatives
作者:Gargi Pal、Sanjay Paul、Partha Pratim Ghosh、Asish R. Das
DOI:10.1039/c3ra46129g
日期:——
A highly efficient and general protocol has been developed for the facile synthesis of highly diversified 1,3,5-trisubstituted pyrazoles and 3,5-disubstituted 2-isoxazolines through one-pot tandem intermolecular, as well as intramolecular, dipolar [3 + 2] cycloaddition reactions. Chemoselective oxidation of aldohydrazone to nitrile imine and aldoximes to nitrile oxides by iodosobenzene in neutral aqueous
已经开发了一种高效通用的方案,可通过一锅串联分子间以及分子内偶极[3 + 2]轻松合成高度多样化的1,3,5-三取代的吡唑和3,5-二取代的2-异恶唑啉。环加成反应。在中性水性介质中,通过碘代苯进行了hydr的化学选择氧化为腈亚胺,醛糖肟为腈氧化物。已经证明了在PhIO存在下向高取代的吡唑和异恶唑啉衍生物与烯烃进行区域控制的偶极环加成反应的范围。SDS将最初漂浮的反应物料和有机氧化剂PhIO转化为均匀的混合物,在搅拌下变成浑浊的乳液。通过动态光散射和光学显微镜确认胶束排列。新的,绿色和不含金属的合成方法使得能够执行区域控制的串联环加成氧化序列,从而形成吡唑和异恶唑啉衍生物的文库。