Rhodium-Catalyzed Branched-Selective Alkyne Hydroacylation: A Ligand-Controlled Regioselectivity Switch
作者:Carlos González-Rodríguez、Rebekah J. Pawley、Adrian B. Chaplin、Amber L. Thompson、Andrew S. Weller、Michael C. Willis
DOI:10.1002/anie.201100956
日期:2011.5.23
It's all in the ligand: By choice of the appropriate diphosphine ligand a previously linear‐selective alkynehydroacylation process can be “switched” to be highly branched‐selective (see scheme, l=linear, b=branched). Structural data for the ortho‐iPr‐dppe–rhodium catalyst suggest restricted rotation of the phosphine aryl units may be responsible for the observed selectivity.