Palladium-Catalyzed Direct Arylations of Heteroarenes with Tosylates and Mesylates
作者:Lutz Ackermann、Andreas Althammer、Sabine Fenner
DOI:10.1002/anie.200804517
日期:2009.1
A toss up: A highly active palladium complex enabled the first directarylation of heteroarenes through CH bond functionalization using tosylates or mesylates as electrophiles with ample scope.
Palladium-Catalyzed C–H Arylation of (Benzo)oxazoles or (Benzo)thiazoles with Aryltrimethylammonium Triflates
作者:Feng Zhu、Jian-Long Tao、Zhong-Xia Wang
DOI:10.1021/acs.orglett.5b02458
日期:2015.10.2
The C-H arylation of (benzo)oxazoles or (benzo)thiazoles with aryltrimethylammonium triflates was carried out via Pd-catalyzed C-H/C-N cleavage. Oxazoles, thiazoles, benzoxazole, and benzothiazole were arylated using activated and deactivated aryltrimethylamrnonium triflates to give 2-aryl(benzo)oxazoles or 2-aryl(benzo)thiazoles in reasonable to excellent yields.
Palladium-Catalyzed Coupling of Azoles or Thiazoles with Aryl Thioethers via C–H/C–S Activation
作者:Feng Zhu、Zhong-Xia Wang
DOI:10.1021/acs.orglett.5b00510
日期:2015.3.20
Palladium-catalyzed cross-coupling via the (CspS)-S-2 bond activation of aryl thioethers and the C-H bond activation of azoles or thiazoles was carried out. Electron-deficient and -rich aryl methyl thioethers and diaryl thioethers can be employed as the coupling partners and the reaction tolerates a range of functional groups including MeO, CF3, CN, PhCO, CONEt2, and Py groups.