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
Iron-catalysed enantioconvergent Suzuki–Miyaura cross-coupling to afford enantioenriched 1,1-diarylalkanes
作者:Chet C. Tyrol、Nang S. Yone、Connor F. Gallin、Jeffery A. Byers
DOI:10.1039/d0cc05003b
日期:——
The first stereoconvergent Suzuki–Miyaura cross-coupling reaction was developed to afford enantioenriched 1,1-diarylalkanes.
第一个立体对映选择性的铃木-宫浦偶联反应被开发出来,用于合成手性富集的1,1-二芳基烷烃。
Functional-Group-Tolerant, Nickel-Catalyzed Cross-Coupling Reaction for Enantioselective Construction of Tertiary Methyl-Bearing Stereocenters
作者:Hanna M. Wisniewska、Elizabeth C. Swift、Elizabeth R. Jarvo
DOI:10.1021/ja4034999
日期:2013.6.19
The first Negishi nickel-catalyzed stereospecific cross-coupling reaction of secondary benzylic esters is reported. A series of traceless directing groups is evaluated for ability to promote cross-coupling with dimethylzinc. Esters with a chelating thioether derived from commercially available 2-(methylthio)acetic acid are most effective. The products are formed in high yield and with excellent stereospecificity