Radical Aza-Cyclization of α-Imino-oxy Acids for Synthesis of Alkene-Containing <i>N</i>-Heterocycles via Dual Cobaloxime and Photoredox Catalysis
作者:Jia-Lin Tu、Jia-Li Liu、Wan Tang、Ma Su、Feng Liu
DOI:10.1021/acs.orglett.0c00224
日期:2020.2.7
Nitrogen-containing heterocycles are prevalent in both naturally and synthetically bioactive molecules. We report herein an unprecedented protocol for radical aza-cyclization of α-imino-oxy acids with pendant alkenes via synergistic photoredox and cobaloxime catalysis. With or without alkenes as the intermolecular cross-coupling partners, the transformation provides a variety of corresponding alkene-containing dihydropyrrole
天然和合成生物活性分子中都普遍存在含氮杂环。我们在本文中报道了一种空前的协议,用于通过协同光氧化还原和钴肟催化的α-亚氨基-氧酸与侧链烯烃的氮杂氮环化。在有或没有烯烃作为分子间交叉偶联伴侣的情况下,转化以令人满意的产率提供了多种相应的含烯烃的二氢吡咯产物。在存在外部烯烃的情况下,串联反应产生具有优异的化学和立体选择性的E-选择性偶联产物。