|
|||||
|
|
Formation of Thermally Robust Frustrated Lewis Pairs by Electrocyclic Ring Closure Reactions |
|
| Authors: | Dr. Guo‐Qiang Chen Dr. Gerald Kehr Dr. Constantin G. Daniliuc Dr. Christian Mück‐Lichtenfeld Prof. Dr. Gerhard Erker |
| Affiliation: | Organisch-Chemisches Institut der Universit?t Münster, Münster, Germany |
| Abstract: | The phosphorus/boron‐substituted hexatriene systems 6 undergo thermally induced electrocyclic ring closure to yield the cyclohexadiene‐derived P/B frustrated Lewis pairs (FLPs) 7 . Subsequent TEMPO oxidation gives the phenylene‐bridged FLPs 8 . Both systems activate dihydrogen and the thermally robust FLPs undergo carbon–carbon coupling reactions at a mesityl group upon treatment with dimethyl acetylenedicarboxylate at elevated temperatures. |
| Keywords: | aromatization reaction electrocyclic ring closure frustrated Lewis pairs ipso substitution metal-free dihydrogen activation |