The structure and the stereochemistry of the mono-adducts, obtained by 1,3-dipolar cycloaddition of nitrile oxides to cyclooctatetraene, have been elucidated on chemical evidence. Thermolysis of their Diels-Alder adducts with acetylenedicarboxylate yielded 4-aryl (or alkyl)-2,3-oxazabicyclo[3.2.0]hepta-3,6-dienes. Some reactions of this new heterocyclic condensed system are described.
通过
化学证据阐明了通过
腈类化合物的1,3-偶极环加成反应获得的单加合物的结构和立体
化学。用
乙炔二
羧酸酯对其Diels-Alder加合物进行热解,得到4-芳基(或烷基)-2,3-氧杂双环[3.2.0]庚3,6-二烯。描述了这种新的杂环缩合系统的一些反应。