developed. Enantioselective construction of quaternary carbon centers by utilizing Pd-catalyzed asymmetric allylic alkylation proved its feasibility. An efficient and practical method for the synthesis of α,α-disubstituted six-membered lactones was developed. Enantioselective construction of quaternary carbon centers by utilizing Pd-catalyzed asymmetric allylic alkylation proved its feasibility.
Remote Control of Regio- and Diastereoselectivity in the Hydroformylation of Bishomoallylic Alcohols with Catalytic Amounts of a Reversibly Bound Directing Group
作者:Christian U. Grünanger、Bernhard Breit
DOI:10.1002/anie.200905949
日期:2010.1.25
Remote and reversible! Phosphinites serve as reversiblybounddirectinggroups for the remotecontrol of the regio‐ and diastereoselectivehydroformylation of bishomoallylicalcohols (see scheme; r.r: regioisomer ratio). The distance between the double bond and the functional hydroxy group to which the directinggroup is reversiblybound is the longest ever reported.