Hydroarylation of Styrenes with Electron-Rich Arenes Over Acidic Ion-Exchange Resins

Room Temperature Catalyst System for the Hydroarylation of Olefins

“…The Friedel–Crafts method has been realized with AlCl 3 , FeCl 3 , bismuth reagents, gold complexes, and graphene oxide (Scheme , eq 1) . In addition, Brønsted acids, including acidic resins and zeolites, are capable of achieving the hydroarylation of olefins. Major drawbacks of these procedures include high temperatures, ,− , polyalkylation, stoichiometric amounts of Lewis acid, and requirement of the arene in excess (commonly as solvent). − , A room temperature hydroarylation was achieved by Niggemann and co-workers using Ca­(NTf 2 ) 2 with Bu 4 NPF 6 ; however, this reagent combination is expensive and also requires excess arene.…”

The Use of Dual Catalysts to Obtain High Selectivity for di‐Styrenated Phenol in the Reaction between Styrene and Phenol

“…However, although many studies of the synthesis of styrenated phenol have been focused to the selective preparation of MSP, little research has been conducted to prepare obtain high selectivity for the formation of o,o ‐ DSP. In addition, although many efficient catalysts are reported, using two catalysts at a time has been very rarely reported…”

Silber‐katalysierte Hydroarylierung von hochsubstituierten Styrolen

“…Viele Wissenschaftler haben nützliche katalytische Systeme entwickelt, um die Friedel-Crafts-Hydroarylierung von Styrolen zu ermçglichen. Metallkatalysatoren auf Basis von Au, [4] Ca, [5] Fe, [6] Bi [7] und anderen [8] sowie nichtmetallische Katalysatoren wie I 2 , [9] Brønsted-Säuren [10] oder heterogene Systeme [11] haben gezeigt, dass sie die Bildung der C-C-Bindung in Gegenwart des geeigneten Nukleophils und Elektrophils ermçglichen (Schema 1 B). Während elektronenreiche Benzolderivate als geeignete Nukleophile gut erforscht sind, gibt es in diesen Berichten nur vereinzelte Einträge von heteroaromatischen Nukleophilen, und in den meisten dieser Fälle werden Mischungen von C2-und C3-Isomeren berichtet.…”