Bis(pinacolato)diboron selectively adds to terminal alkenes and cyclic
alkenes having internal strain to provide bis(boryl)alkanes in
76–86% yields in the presence of a catalytic amount of
Pt(dba)
2
at 50 °C.
Copper-Catalyzed Coupling of Alkyl Vicinal Bis(boronic Esters) to an Array of Electrophiles
作者:Ningxin Xu、Ziyin Kong、Johnny Z. Wang、Gabriel J. Lovinger、James P. Morken
DOI:10.1021/jacs.2c02817
日期:2022.10.5
between vicinal bis(boronic esters) and allyl, alkynyl, and propargyl electrophiles as well as a simple proton. Because the reactive substrates are vicinal bis(boronic esters), the cross-coupling described herein provides an expedient new method for the construction of boron-containing reaction products from alkenes. Mechanistic experiments suggest that chelated cyclic ate complexes may play a role in
Desymmetrization of Vicinal Bis(boronic) Esters by Enantioselective Suzuki–Miyaura Cross-Coupling Reaction
作者:Mingkai Zhang、Paul S. Lee、Christophe Allais、Robert A. Singer、James P. Morken
DOI:10.1021/jacs.3c01571
日期:2023.4.19
The development of an enantioselective catalytic Suzuki–Miyaura reaction that applies to meso 1,2-diborylcycloalkanes is described. This reaction provides a modular route to enantiomerically enriched substituted carbocycles and heterocycles that retain a synthetically versatile boronicester. With appropriately constructed substrates, compounds bearing additional stereogenic centers and fully substituted