I<sub>2</sub>O<sub>5</sub>-Mediated 1,5-Cyclization of Aryldiynes with H<sub>2</sub>O: A Way To Access 3-Acyl-1-indenone Derivatives
作者:Bingwei Zhou、Huan Yang、Hongwei Jin、Yunkui Liu
DOI:10.1021/acs.joc.8b03151
日期:2019.2.15
A facile I2O5-mediated 1,5-cyclization of aryldiynes with H2O has been successfully developed, leading to a broad range of substituted 3-acyl-1-indenones in moderate to excellent yields. The protocol has advantages of a metal-free process, mild reaction conditions, simple operation, and broad functional group tolerance. In the reaction, H2O is used as both a cosolvent and an oxygen source.
已经成功地开发了一种容易的I 2 O 5介导的芳基二炔与H 2 O的1,5-环化反应,从而以中等到极好的收率产生了广泛的取代的3-酰基-1-茚满酮。该方案具有无金属工艺,温和的反应条件,简单的操作和广泛的官能团耐受性的优点。在反应中,H 2 O既用作助溶剂又用作氧气源。
Bergman Cyclization of Fluorinated Benzo-Fused Enediynes to Naphthalene Derivatives: Syntheses and Structures
作者:Christopher M. Kane、Tiffany B. Meyers、Xin Yu、Michael Gerken、Markus Etzkorn
DOI:10.1002/ejoc.201001747
日期:2011.6
Fluorinated naphthalenederivatives were prepared by Bergman cyclization of fluorinated benzo-fused enediynes. This route provides access to the aromatic target compounds in a two-step procedure from commercially available precursors, via a Sonogashira cross-coupling and a subsequent, thermally initiated Bergman cyclization. Crystal structures of six fluorinated benzo-enediynes and three fluorinated
On the Gold-Catalyzed Generation of Vinyl Cations from 1,5-Diynes
作者:Thomas Wurm、Janina Bucher、Sarah B. Duckworth、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201700057
日期:2017.3.13
Conjugated 1,5‐diynes bearing two aromatic units at the alkyne termini were converted in the presence of a gold catalyst. Under mild conditions, aryl‐substituted dibenzopentalenes were generated. Calculations predict that aurated vinyl cations are key intermediates of the reaction. A bidirectional approach provided selective access to the angular annulated product in high yield, which was explained