Active Molybdenum-Based Anode for Dehydrogenative Coupling Reactions
作者:Sebastian B. Beil、Timo Müller、Sydney B. Sillart、Peter Franzmann、Alexander Bomm、Michael Holtkamp、Uwe Karst、Wolfgang Schade、Siegfried R. Waldvogel
DOI:10.1002/anie.201712718
日期:2018.2.23
and powerful active anode system that can be operated in 1,1,1,3,3,3‐hexafluoro‐2‐propanol (HFIP) has been discovered. In HFIP the molybdenum anode forms a compact, conductive, and electroactive layer of higher‐valent molybdenum species. This system can replace powerful but stoichiometrically required MoV reagents for the dehydrogenative coupling of aryls. This electrolytic reaction is more sustainable
Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer
作者:Sholto R. McLaren、Daniel J. Tate、Owen R. Lozman、Georg H. Mehl、Richard J. Bushby
DOI:10.1039/c5tc00661a
日期:——
The synthesis is reported for a main chain polymer in which the repeat units are 2,3,6,7,10,11-hexaphenyltriphenylene moieties linked through flexible dodecyl chains.
Ring Closing Metathesis Approach for the Synthesis of <i>o</i>
-Terphenyl Derivatives
作者:Shilpi Karmakar、Tirtha Mandal、Jyotirmayee Dash
DOI:10.1002/ejoc.201900988
日期:2019.9.15
A synthetic method for o‐terphenyls from benzils is reported usingringclosingmetathesis (RCM) as the key step. o‐Terphenyls with halogen substituents are synthesized that can be further functionalized by cross coupling reactions. The synthesis of triphenylenes demonstrates the synthetic utility of the approach.
Catalytic Dehydrogenative Cyclization of
<i>o</i>
‐Teraryls under pH‐Neutral and Oxidant‐Free Conditions
作者:Tatsuhiro Tsukamoto、Guangbin Dong
DOI:10.1002/anie.202004719
日期:2020.8.24
A cobaloxime‐catalyzed acceptorless dehydrogenative cyclization of o‐teraryls was developed. In stark contrast to the established methods such as the Scholl or Mallory reactions, this method does not require any strong acids or oxidants, and shows high atom economy and a broad substrate scope. It operates at near room temperature with light as the source of energy. Acid‐ or oxidant‐sensitive functional
Powerful Fluoroalkoxy Molybdenum(V) Reagent for Selective Oxidative Arene Coupling Reaction
作者:Moritz Schubert、Jana Leppin、Kathrin Wehming、Dieter Schollmeyer、Katja Heinze、Siegfried R. Waldvogel
DOI:10.1002/anie.201309287
日期:2014.2.24
fluoroalkoxy molybdenum(V) reagent 1 which has superior reactivity and selectivity in comparison to MoCl5 or the MoCl5/TiCl4 reagent mixture in the oxidativecoupling reactions of aryls. Common side reactions, such as chlorination and/or oligomer formation, are drastically diminished creating a powerful and useful reagent for oxidativecoupling. Theoretical treatment of the reagent interaction with 1,2‐