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 Borylation of Benzylic Ammonium Salts: Stereospecific Synthesis of Enantioenriched Benzylic Boronates
作者:Corey H. Basch、Kelsey M. Cobb、Mary P. Watson
DOI:10.1021/acs.orglett.5b03455
日期:2016.1.4
stereospecific, nickel-catalyzed cross-coupling of secondarybenzylic ammonium salts and diboronate esters to deliver highly enantioenriched benzylic boronates. This reaction utilizes amine-derived electrophiles, which are readily available in high enantiopurity, and simple, inexpensive nickel catalysts. This reaction has broad scope, enabling synthesis of a variety of secondarybenzylic boronates in
Asymmetric synthesis<i>via</i>stereospecific C–N and C–O bond activation of alkyl amine and alcohol derivatives
作者:Sarah M. Pound、Mary P. Watson
DOI:10.1039/c8cc07093h
日期:——
electrophiles for stereospecific, nickel-catalyzed cross-coupling reactions, as well as the prior art that inspired our efforts. The success of our effort has relied on the use of benzyl ammonium triflates as electrophiles for cross-couplings via C–Nbondactivation and benzylic and allylic carboxylates for cross-couplings via C–O bondactivation. Our work, along with others’ exciting discoveries, has demonstrated