different side chains undergo thermal conversion to 5 - and 6 - membered cyclic nitrones, via concerted 1,3 - azaprotio cyclotransfer, followed by stereospecific intramolecular cycloaddition to give tricyclic spiro- and fused- ring systems. An X-ray crystal structure of one such product is reported.
在不同侧链上含有两个烯基部分的醛
肟和酮
肟通过协同的1,3-氮杂proproio环转移进行热转化为5和6员环硝酮,然后进行立体有规的分子内环加成反应生成
三环螺环和稠环系统。报告了一种这样的产物的X射线晶体结构。