A general, simple catalyst for enantiospecific cross couplings of benzylic ammonium triflates and boronic acids: no phosphine ligand required
作者:Danielle M. Shacklady-McAtee、Kelsey M. Roberts、Corey H. Basch、Ye-Geun Song、Mary P. Watson
DOI:10.1016/j.tet.2014.03.039
日期:2014.7
enantiospecific crosscoupling of benzylic ammonium triflates with boronic acids are reported. This method relies on the use of Ni(cod)2 without ancillary phosphine or N-heterocyclic carbene ligands as catalyst. These conditions enable the coupling of new classes of boronic acids and benzylic ammonium triflates. In particular, both heteroaromatic and vinyl boronic acids are well tolerated as coupling partners
Nickel-Catalyzed Cross Couplings of Benzylic Ammonium Salts and Boronic Acids: Stereospecific Formation of Diarylethanes via C–N Bond Activation
作者:Prantik Maity、Danielle M. Shacklady-McAtee、Glenn P. A. Yap、Eric R. Sirianni、Mary P. Watson
DOI:10.1021/ja3089422
日期:2013.1.9
We have developed a nickel-catalyzed cross coupling of benzylic ammonium triflates with aryl boronicacids to afford diarylmethanes and diarylethanes. This reaction proceeds under mild reaction conditions and with exceptional functional group tolerance. Further, it transforms branched benzylic ammonium salts to diarylethanes with excellent chirality transfer, offering a new strategy for the synthesis