Organophotocatalytic Generation of N- and O-Centred Radicals Enables Aerobic Oxyamination and Dioxygenation of Alkenes
作者:Xiao-Qiang Hu、Jun Chen、Jia-Rong Chen、Dong-Mei Yan、Wen-Jing Xiao
DOI:10.1002/chem.201602597
日期:2016.9.26
applied for the first time to the direct conversion of N−H and O−H bonds into N‐ and O‐centred radicals, enabling a general and selective oxidative radical oxyamination and dioxygenation of various β,γ‐unsaturated hydrazones and oximes. In the reaction, O2 was employed not only as a terminal oxidant but also as the oxygen source. This protocol provided efficient access to the synthesis of various synthetically
TEMPO和光氧化还原的催化合作策略首次应用于将N-H和O-H键直接转化为N-和O-中心的自由基,从而实现各种β,γ的一般和选择性氧化自由基的氧化和双加氧作用不饱和的和肟。在该反应中,不仅将O 2用作末端氧化剂,而且还将其用作氧源。该方案为在无金属和温和的反应条件下有效地合成各种重要的合成和生物学重要的吡唑啉,哒嗪和异恶唑啉衍生物提供了有效的途径。机理研究表明,协同有机光催化系统通过两个单电子转移(SET)过程起作用。