Cascade Nitration/Cyclization of 1,7-Enynes with<i>t</i>BuONO and H<sub>2</sub>O: One-Pot Self-Assembly of Pyrrolo[4,3,2-<i>de</i>]quinolinones
作者:Yu Liu、Jia-Ling Zhang、Ren-Jie Song、Peng-Cheng Qian、Jin-Heng Li
DOI:10.1002/anie.201404192
日期:2014.8.18
Here we describe the one‐pot construction of the pyrrolo[4,3,2‐de]quinolinone scaffold by a cascadenitration/cyclization sequence of 1,7‐enynes with tBuONO and H2O. The cascade proceeds through alkene nitration, 1,7‐enyne 6‐exo‐trig cyclization, CH nitrations, and redox cyclization, and exhibits excellent functional group tolerance. The mechanism was investigated using in situ high‐resolution mass
We herein describe a nickel-catalyzed cascade hydrosilylation/cyclization reaction of 1,7-enynes with bulky triphenylsilane. A series of silyl-containing quinolinone derivatives are obtained in good to excellent yields under mild reaction conditions. This reaction also features excellent chemoselectivity, broad functional group tolerance, and gram-scale synthesis.
Dinuclear-gold-catalyzed radical difunctionalization of alkylbromides with 1,7-enynes has been established via dehalogenation and 1,5-HAT processes. This protocol was used to construct, in a facile and efficient manner, a wide range of cyclopenta[c]quinolines bearing two quaternary carbon centers with good yields (28 examples, up to 84% yield). The good functional group compatibility and gram-scale
通过脱卤和 1,5-HAT 过程,双核金催化的烷基溴与 1,7-烯炔的自由基双官能化已经建立。该方案用于以简便有效的方式构建多种具有两个季碳中心的环戊[ c ]喹啉,且产率良好(28个实例,产率高达84%)。该反应良好的官能团相容性和克级制备能力证明了其合成的稳健性。
Demethylenative cyclization of 1,7-enynes using α-amino radicals as a traceless initiator enabled by Cu(i)-photosensitizers
作者:Qinfang Jiang、Hanyang Bao、Yun Peng、Yan Zhou、Lang Chen、Yunkui Liu
DOI:10.1039/d4cc01592d
日期:——
A Cu(i)-photosensitizer-enabled demethylenative radical cyclization of 1,7-enynes to access quinoline-2-(1H)-ones was successfully achieved using α-amino radicals as a traceless radical initiator.