Bisulfate Salt-Catalyzed Friedel–Crafts Benzylation of Arenes with Benzylic Alcohols
作者:Ren-Jin Tang、Thierry Milcent、Benoit Crousse
DOI:10.1021/acs.joc.8b02361
日期:2018.11.16
We report here a method of direct Friedel–Craftsbenzylation of arenes with benzylic alcohols using cheap and readily available bisulfate salt as the catalyst in hexafluoroisopropanol. The catalytic system is powerful with a quite diverse group of functionalized arenes and benzylic alcohols. These mild conditions provide a straightforward synthesis of a variety of unsymmetrical diarylmethanes in high
Iron-Catalyzed Arylation of Aromatic Ketones and Aldehydes Mediated by Organosilanes
作者:Risto Savela、Marcin Majewski、Reko Leino
DOI:10.1002/ejoc.201402023
日期:2014.7
arylation of aromatic carbonyl compounds is reported. The use of 4 % FeCl3 or Fe(acac)3 as the catalyst, in combination with a slight excess of chlorotrimethylsilane and triethylsilane, chlorination of benzylic ketones and aldehydes with subsequent Friedel–Craftsalkylation of arenes is achieved. Although the method is limited by the general constraints associated with Friedel–Craftsalkylation reactions
Calcium(II)-Catalyzed Intermolecular Hydroarylation of Deactivated Styrenes in Hexafluoroisopropanol
作者:Chenxiao Qi、Vincent Gandon、David Lebœuf
DOI:10.1002/anie.201809470
日期:2018.10.22
A challenging catalytic hydroarylation of highly electron deficient styrenes has been developed on the basis of efficient cooperation between a calcium(II) triflimide salt and hexafluoroisopropanol (HFIP). This method affords a large variety of diaryl alkanes, notably diaryl ethanes, in good to excellent yields, and is simple to implement and compatible with various functional groups. Furthermore,