asymmetric Suzuki–Miyauracoupling. By virtue of the coupling with dialkoxyphosphinyl substituted naphthyl bromides and 2-nitronaphthalen-1-yl triflouromethanesulfonate, a series of novel multifunctionalized axially chiral biaryls were prepared in 53–97% yields with up to 97% ee using palladium-Cy-MOP as the catalyst. The methodology provides a highly efficient and practical strategy for the synthesis of novel
Enantioselective Synthesis of Biaryl Atropisomers via Pd/Norbornene-Catalyzed Three-Component Cross-Couplings
作者:Linlin Ding、Xianwei Sui、Zhenhua Gu
DOI:10.1021/acscatal.8b01037
日期:2018.6.1
Three-component cross-coupling cocatalyzed by palladium and norbornene is reported for the synthesis of biaryl atropisomers. This domino reaction gave optimal yield and enantioselectivity with a P,C-type ligand bearing axial chirality and P chiral center. The process showed advantages over traditional cross-coupling because of its step economy and its compatibility with readily available ortho-substituted
Herein, we report the rhodium-catalyzeddominoarylation/cyclization reaction of unactivated internal alkynes to afford the optically active indenols in excellent yields (up to 92%) and extremely high enantioselectivities (up to 99% ee) in the presence of new amide substituted chiral diene ligands. Notably, a total of 21 new chiral diene ligands are synthesized, which are potential choices for other
Presented herein is a palladium-catalyzed asymmetric (3 + 2) annulation reaction between 1,3-dienes and 2-formylarylboronic acids, proceeding in a cascade vinylogous addition and Suzuki coupling process. Both electron-neutral and electron-deficient 1,3-dienes are compatible under similar catalytic conditions, and distinct regioselectivity is observed via functional-group control of 1,3-diene substrates