Metal-free transfer hydrogenation/cycloaddition cascade of activated quinolines and isoquinolines with tosyl azides
作者:Suman Yadav、Ruchir Kant、Malleswara Rao Kuram
DOI:10.1039/d3cc01430d
日期:——
difficulty in isolating cyclic enamines emanating from their intrinsic instability has impeded their exploration in cycloaddition reactions. Here, we achieved a metal-free domino reaction providing quinoline and isoquinoline-derived cyclic amidines by the cycloaddition of azides with in situ generated enamines via dearomatization.
Facile Construction of Benzo[<i>d</i>][1,3]oxazocine: Reductive Radical Dearomatization of <i>N</i>-Alkyl Quinoline Quaternary Ammonium Salts
作者:Fu-Yu Li、Yao Xiao、Dong-Wei Huang、Meng Luo、Lu Li、Hong Xu、Bei Wang、Ji-Yu Wang
DOI:10.1021/acs.orglett.3c04243
日期:2024.3.15
Reductive radical dearomatization N-alkyl quinoline quaternary ammonium salts to synthesize structurally complex and challenging polysubstituted benzo[d][1,3]oxazocines was first reported. The mechanism showed various allyl alcohols can be converted into alkyl radicals under reduction conditions of iron/silane. These radicals then nucleophilically attack the C4 site of N-alkyl quinoline quaternary
首次报道了还原自由基脱芳构化N-烷基喹啉季铵盐合成结构复杂且具有挑战性的多取代苯并[ d ][1,3]恶佐辛。该机理表明,在铁/硅烷的还原条件下,各种烯丙醇可以转化为烷基自由基。然后这些自由基亲核攻击N-烷基喹啉季铵盐的C4位点,所得中间体的分子内环化生成目标产物。该方法不仅制备了一系列新型多取代苯并[ d ][1,3]恶唑嗪化合物,而且还制备了多环苯并[ d ][1,3]恶唑嗪化合物。最后,该策略弥补了N-烷基喹啉鎓盐还原自由基报道的不足,同时具有反应条件温和、底物范围广、产物结构新颖等优点。
Exploratory and mechanistic aspects of the electron-transfer photochemistry of olefin-N-heteroaromatic cation systems
作者:Ung Chan Yoon、Suzanne L. Quillen、Patrick S. Mariano、Rosemarie Swanson、Jerome L. Stavinoha、Elliott Bay