The 1,3-dipolar cycloaddition of nitrile oxides to 1-cyanoenamines gives 5-aminoisoxazoles regioselectively. Moderate to good yields could be obtained depending on the method used to generate the nitrile oxides. The intermediate isoxazolines could not be isolated.
腈氧化物与1-
氰基烯胺的1,3-偶极环加成反应区域选择性地合成了5-
氨基
异恶唑。根据产生腈氧化物的方法不同,产率从中等到良好不等。中间体
异恶唑啉无法被分离出来。