Silver-mediated fluorination of potassium aryltrifluoroborates with Selectfluor®
摘要:
A simple and practical procedure for the silver-mediated fluorination of aryl- and heteroaryltrifluoroborates with electrophilic fluorine from Selectfluor (R) and LiOH center dot H2O is presented. The reaction procedure is simple and easy to set up, the process produces fluorinated arenes and heteroarenes in good to excellent yields and a wide range of electronically and structurally diverse substrates are tolerated. (C) 2014 Elsevier Ltd. All rights reserved.
Electrochemical
<i>ipso</i>
‐Thiocyanation of Arylboron Compounds
作者:Marco Dyga、Davit Hayrapetyan、Raja K. Rit、Lukas J. Gooßen
DOI:10.1002/adsc.201900156
日期:2019.8.5
An operationally simple electrochemicalmethod for the transition‐metal‐free ipso‐thiocyanation of arylboronicacids and aryl trifluoroborates has been developed. The SCN electrophile is generated in situ by anodic oxidation of thiocyanate anions, which avoids formation of salt waste and prevents unwanted side reactions arising from chemical oxidants. The reaction proceeds regiospecifically, and the
procedure for the copper-mediated oxidativetrifluoromethylthiolation of potassium aryl- and heteroaryltrifluoroborates with Ruppert–Prakash reagent and elementalsulfur is presented. Aryl trifluoromethyl thioethers can be prepared in good to moderate yield under mild reaction conditions. A facile procedure for the copper-mediated oxidativetrifluoromethylthiolation of potassium aryl- and heteroaryltrifluoroborates
Oxidative Cycloaddition Reactions of Arylboron Reagents via a One-pot Formal Dehydroboration Sequence
作者:Shubhendu S. Karandikar、Bryan E. Metze、Riley A. Roberts、David R. Stuart
DOI:10.1021/acs.orglett.3c02379
日期:2023.9.1
are widely available and synthetically useful reagents in which the boron group is typically substituted. Herein, we show that the boron group and ortho-hydrogen atom are substituted in a formal cycloaddition reaction. This transformation is enabled by a one-pot sequence involving diaryliodonium and aryne intermediates. The scope of arylboron reagents and arynophiles is demonstrated, and the method