Amino Azaxylylenes Photogenerated from<i>o</i>‐Amido Imines: Photoassisted Access to Complex Spiro‐Poly‐Heterocycles
作者:Olga A. Mukhina、Dmitry M. Kuznetsov、Teresa M. Cowger、Andrei G. Kutateladze
DOI:10.1002/anie.201504455
日期:2015.9.21
Upon irradiation, cyclic imines containing o‐amido groups are shown to produce reactive intermediates, amino azaxylylenes, which undergo intramolecular cycloadditions to tethered unsaturated pendants to yield complex N,O‐heterocycles having an additional spiro‐connected nitrogen heterocyclic moiety. Modular assembly of the photoprecursors allows expeditious increase of the complexity of the target
Intramolecular Photoassisted Cycloadditions of Azaxylylenes and Postphotochemical Capstone Modifications via Suzuki Coupling Provide Access to Complex Polyheterocyclic Biaryls
作者:W. Cole Cronk、Olga A. Mukhina、Andrei G. Kutateladze
DOI:10.1021/jo4026447
日期:2014.2.7
Modular preassembly of azaxylylene photoprecursors, halogen-substituted in the aromatic ring, their intramolecular [4 + 4] or [4 + 2] cycloadditions to tethered unsaturated pendants, and subsequent postphotochemical capstone modification of the primary photoproducts via Suzuki coupling provides rapid access to diverse biaryls of unprecedented topology. This synthetic sequence allows for rapid growth of molecular complexity and is well aligned with methodology of Diversity-Oriented Synthesis.