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
辐照后,含邻氨基的环状亚胺被证明可产生反应性中间体氨基氮杂二甲苯,这些分子经过分子内环加成作用到不饱和的侧链上,生成复杂的N,O-杂环,并具有一个螺环连接的氮杂环部分。光前体的模块化组装可以通过最少的实验上简单的反应步骤,迅速增加目标多杂环支架的复杂性。光环化和随后的光化学转化伴随着Lovering的fsp3因子的增加,从而产生了前所未有的三维分子结构,并提供了扩展的化学空间采样。