Chiral monodentate phosphine ligands for the enantioselective α- and γ-arylation of aldehydes
作者:Ivan Franzoni、Laure Guénée、Clément Mazet
DOI:10.1016/j.tet.2014.02.079
日期:2014.7
phosphine ligands elaborated on the binepine scaffold is described. Their application in the Pd-catalyzedintramolecularasymmetricα-arylation of aldehydes and the intermolecular asymmetric γ-arylation of α,β-unsaturated aldehydes provides a mean of validating the design of these ligands. For the first reaction, excellent reactivities have been obtained while only modest enantioselectivities were measured
novel class of bidentate (P,N) ligands is presented, the structures of which are characterized by three distinct elements of chirality. The stereoselective installation of the elements of central chirality (at the benzylic carbon and the phosphorus atom) depends on the size of the phosphorus substituent. Thermal inversion of the phosphorus center has been studied experimentally and further correlated