respectively. When subjected to flash vacuum thermolysis conditions, the spiranic cycloadducts rearranged to afford mainly the desired azepin-4-one derivatives. In addition, the isoxazoline cycloadducts gave unexpected by-products, which were identified as 1-alkenyl-2-pyrrolidinones. Analogies and differences with respect to the lower homologue cyclopropanes are evidenced in both cycloaddition and rearrangement
一些代表性的4,5-二氢和四氢
异恶唑5-螺
环丁烷是通过亚烷基
环丁烷的1,3-偶极环加成分别合成腈氧化物和硝酮而合成的。当经受闪蒸真空热解条件时,芳基环加合物重新排列以主要提供所需的氮杂庚-4-酮衍
生物。另外,
异恶唑啉环加合物产生意外的副产物,其被鉴定为1-烯基-
2-吡咯烷酮。在环加成反应和重排反应中均证明了与低级同系
环丙烷的相似性和差异。