1314581-23-1Relevant articles and documents
Palladium-Catalyzed Allylation of Polyfluoroarenes with Allylic Pivalates
Jiang, Xinpeng,Liu, Yong,Zhang, Lei,Chen, Jinkang,Cheng, Kang,Yu, Chuanming
, p. 251 - 255 (2017/09/27)
An efficient 1,5-cyclooctadiene-PdCl 2 /dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine (XPhos) catalytic system was developed for C-H allylation of polyfluoroarenes with allylic pivalates. The reactions showed excellent functional-group tolerance, good yields, and high regioselectivities. Mechanistic investigations supported a (π-allyl)palladium complex pathway through a directed oxidative addition of the allylic pivalate to palladium, followed by sequential nucleophilic attack by the polyfluorobenzene and reductive elimination. In a gram-scale reaction, a palladium loading of 0.5 mol% was enough to afford the required product in good yield.
Synthesis of allylarenes via catalytic decarboxylation of allyl benzoates
Pfister, Kai F.,Grünberg, Matthias F.,Goossen, Lukas J.
, p. 3302 - 3306 (2015/02/02)
A catalyst system consisting of the palladium(0) complex Pd2(dba)3 and tri(p-tolyl) phos-phine was found to efficiently promote the decarboxylation of allyl benzoates with formation of allylarenes. This catalytic C-O activation followed by extrusion of carbon dioxide and C-C bond formation represents a sustainable alternative to traditional waste-intensive cross-couplings. The scope of the transformation includes allyl and cinnamyl esters of various ortho-substituted benzoic acids. For particularly activated substrates, the palladium catalyst can optionally be replaced by an inexpensive nickel complex.
Regio- and stereoselective allylic C-H arylation with electron-deficient arenes by 1,1′-Bi-2-naphthol-palladium cooperation
Wang, Gang-Wei,Zhou, An-Xi,Li, Shi-Xia,Yang, Shang-Dong
supporting information, p. 3118 - 3121 (2014/06/23)
A palladium-catalyzed allylic C-H arylation reaction with electron-deficient arenes with high regio- and stereoselectivity is reported. This work represents the first successful use of 1,1′-bi-2-naphthol as the ancillary ligand in allylic C-H activation, which is the key factor for chemoselectivity. Furthermore, high selectivity allylic C-H acetoxylation and amination were also successfully achieved under the same catalytic system.