Construction of novel spiroisoxazolines via intramolecular cyclization/methylation
作者:Erick D. Ellis、Jianping Xu、Edward J. Valente、Ashton T. Hamme
DOI:10.1016/j.tetlet.2009.07.095
日期:2009.9
Improved yields for the syntheses of a variety of spiroisoxazolines were achieved through intramolecular cyclization/methylation reactions of functionalized 5,5-disubstituted isoxazolines in one reaction vessel. Aromatic ring containing nitrile oxides and disubstituted geminal alkenes reacted in a 1,3-dipolar fashion to afford the corresponding 5,5-isoxazoline. A comparison of the relative location
通过在一个反应容器中官能化 5,5-二取代异恶唑啉的分子内环化/甲基化反应,提高了合成各种螺异恶唑啉的产率。含有腈氧化物的芳环和双取代的孪生烯烃以 1,3-偶极方式反应,得到相应的 5,5-异恶唑啉。进行了异恶唑啉和两个不同酯官能团上亲核试剂和亲电试剂的相对位置的比较,以确定用于分子内环化/甲基化反应的最佳异恶唑啉系统。