title: Asymmetric 1,4-hydrosilylations of alpha,beta-unsaturated esters.
abstract: Complexing catalytic amounts of CuH with a nonracemic JOSIPHOS or SEGPHOS ligand, together with stoichiometric PMHS, leads to exceedingly efficient and highly enantioselective 1,4-reductions of beta,beta-disubstituted enoates and lactones. An unprecedented substrate-to-ligand ratio of 7700:1 for this type of reaction is documented.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA. lipshutz@chem.ucsb.edu
authors.forename: Bruce H
authors.initials: BH
authors.lastname: Lipshutz
authors.forename: Jeff M
authors.initials: JM
authors.lastname: Servesko
authors.forename: Benjamin R
authors.initials: BR
authors.lastname: Taft