Mechanosynthesis of Odd‐Numbered Tetraaryl[
<i>n</i>
]cumulenes
作者:Karen J. Ardila‐Fierro、Carsten Bolm、José G. Hernández
DOI:10.1002/anie.201905670
日期:2019.9.9
A mechanochemical synthesis of one‐dimensional carbon allotrope carbyne model compounds, namely tetraaryl[n]cumulenes (n=3, 5) was realized. Central for the mechanosynthesis of the cumulenic carbon nanostructures were the development of a mechanochemical Favorskii alkynylation‐type reaction and the implementation of a solvent‐free, acid‐free reductive elimination with tin(II) chloride by ball milling
实现了一维碳同素异形体碳炔模型化合物,即四芳基[ n ]累积烯(n =3, 5)的机械化学合成。积碳碳纳米结构机械合成的核心是机械化学 Favorskii 炔基化反应的发展,以及通过球磨实现无溶剂、无酸的氯化锡 (II) 还原消除。
Hydroxyl Assisted, Photoredox/Cobalt Co‐catalyzed Semi‐Hydrogenation and Tandem Cyclization of
<i>o</i>
‐Alkynylphenols for Access to 2,3‐Dihydrobenzofurans
Herein, a hydroxyl assisted, photoredox/cobalt co‐catalyzed semi‐hydrogenation and tandem cyclization of o‐alkynylphenols is developed towards direct assembly of 2,3‐dihydrobenzofurans. Moderate to good yields were obtained for a range of sterically and electronically diverse 2‐propynolphenols under mild conditions. Mechanistic studies demonstrated the inevitable role of the alcoholic hydroxyl group