Reaction of benzyne with fluorinated 1,3-dicarbonyl compounds
作者:Muhammad Zahid、Muhammad Farooq Ibad、Zharylkasyn A. Abilov、Peter Langer
DOI:10.1016/j.jfluchem.2012.12.004
日期:2013.2
The insertion of fluorinated 1,3-dicarbonyl compounds to benzyne resulted in regioselective formation of various fluorinated 1,5-dicarbonyl compounds which are not readily available by other methods. Products include 2-trifluoroacetyl- and 2-(perfluoroalkanoyl)phenylacetic estres, 2-fluoro-2-phenylacetic esters, 1-aryl-2-(2-trifluoroacetylphenyl)ethan-1-ones and other derivatives.
Acylalkylation of Arynes Generated from <i>o</i>-Iodoaryl Triflates with Hydrosilanes and Cesium Fluoride
作者:Mai Minoshima、Keisuke Uchida、Yu Nakamura、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1021/acs.orglett.1c00279
日期:2021.3.5
An efficient method to generate aryne intermediates from o-iodoaryl triflates triggered by triethylsilane and cesiumfluoride is disclosed. This method realized the acylalkylation of arynes using easily available o-iodoaryl triflate-type precursors, which was difficult when using conventional nucleophilic activators. A wide range of (hetero)arenes including various fused benzothiazoles were successfully
Cooperative Catalysis for the Highly Diastereo‐ and Enantioselective [4+3]‐Cycloannulation of
<i>ortho</i>
‐Quinone Methides and Carbonyl Ylides
作者:Arun Suneja、Henning Jakob Loui、Christoph Schneider
DOI:10.1002/anie.201913603
日期:2020.3.27
We describe herein a highly diastereo- and enantioselective [4+3]-cycloannulation of ortho-quinone methides and carbonyl ylides to furnish functionalized oxa-bridged dibenzooxacines with excellent yields and stereoselectivity in a single synthetic step. The combination of rhodium and chiral phosphoric acid catalysis working in concert to generate both transient intermediates in situ provides direct