Electron-poor arenesulfonyloxypyridines are selectively dearomatized whether on the pyridine or on the phenyl group through 1,3-dipolar cycloaddition (1,3-DC) involving non-stabilized azomethine ylides (AMY). Electronic effects of substituents on the aromatic rings allow to induce the regioselectivity of the transformation. Novel pyrrolidinic polycyclic heterocycles are thereby produced under mild
缺电子
芳烃磺酰氧基
吡啶通过涉及不稳定的偶氮甲碱叶立德 (
AMY) 的 1,3-偶极环加成 (1,3-DC) 选择性地脱芳构化,无论是在
吡啶上还是在苯基上。芳环上取代基的电子效应可以诱导转化的区域选择性。由此在室温温和酸性条件下产生新型
吡咯烷多环杂环。