Chemoenzymatic Synthesis and Application of Bicyclo[2.2.2]octadiene Ligands: Increased Efficiency in Rhodium-Catalyzed Asymmetric Conjugate Additions by Electronic Tuning
作者:Yunfei Luo、Andrew J. Carnell
DOI:10.1002/anie.200907033
日期:2010.4.1
On your bi(cycle)ke! A series of 1,4‐dimethyl bicyclic [2.2.2] diene ligands with tunable substitution at the bridge positions was accessed using a lipase resolution and a high yielding six step sequence (see scheme). The bridgehead methyl groups improve efficiency allowing less aryl boronic acid to be used in the title reaction.
Chiral bicyclic [2.2.2] octadiene ligands for Rh-catalysed catalytic asymmetric conjugate additions to acyclic enones: a quantitative structure–property relationship
作者:Yunfei Luo、Neil G. Berry、Andrew J. Carnell
DOI:10.1039/c2cc17120a
日期:——
A series of chiral bicyclic [2.2.2]diene ligands gave variable ee values for Rh-catalysed asymmetric conjugate addition to an acyclic enone. The interplay between electronic and steric effects was captured in a robust predictive quantitative structureâproperty relationship (QSPR) model for enantioselectivity.