AbstractAn asymmetric monoborylation of alkenylsilanes catalyzed by a copper(I) complex with the chiral bisphosphine ligand BenzP* is reported. The reaction proceeded with excellent regioselectivity and high enantioselectivity to afford the corresponding optically active organoboronate esters with a stereogenic CB bond containing a vicinal silyl group. The synthetic utility of the product is demonstrated through stepwise transformations to multifunctional optically active compounds in a stereospecific manner.magnified image
Regio‐ and Enantioselective Monoborylation of Alkenylsilanes Catalyzed by an Electron‐Donating Chiral Phosphine–Copper(I) Complex
作者:Koji Kubota、Eiji Yamamoto、Hajime Ito
DOI:10.1002/adsc.201300765
日期:2013.12.16
AbstractAn asymmetric monoborylation of alkenylsilanes catalyzed by a copper(I) complex with the chiral bisphosphine ligand BenzP* is reported. The reaction proceeded with excellent regioselectivity and high enantioselectivity to afford the corresponding optically active organoboronate esters with a stereogenic CB bond containing a vicinal silyl group. The synthetic utility of the product is demonstrated through stepwise transformations to multifunctional optically active compounds in a stereospecific manner.magnified image
Dehydrogenative Silylation of Terminal Alkynes with Hydrosilanes under Zinc-Pyridine Catalysis
A combination of zinc triflate and pyridine in a nitrile medium was found to act as an effective catalytic system for dehydrogenativesilylation with flexible pieces of terminalalkynes and hydrosilanes, thereby producing diverse alkynylsilanes in high to excellent yields.