Novel Olefin-Phosphorus Hybrid and Diene Ligands Derived from Carbohydrates
作者:Mike Boysen、Holger Grugel、Tobias Minuth
DOI:10.1055/s-0030-1258190
日期:2010.10
olefin-phosphinite hybrid ligands has been designed. These ligands were prepared by attaching phosphinite or allylic donor sites onto unsaturated carbohydrate scaffolds. In rhodium(I)-catalysed conjugate addition of boronic acids to enones, the olefin-phosphinite hybrids gave products in up to 99% ee and above, whereas the dienes only led to modest enantioselectivity. However, by shifting the allylic donor