Chiral diphosphinoterpenes and transition metal complexes thereof
申请人:Knochel Paul
公开号:US20050267316A1
公开(公告)日:2005-12-01
The present invention relates to chiral diphosphinoterpenes and transition metal complexes thereof, to a process for preparing chiral diphosphinoterpenes and oxides thereof, and to transition metal complexes comprising the chiral diphosphinoterpenes. In a further aspect, the invention relates to the use of the chiral diphosphinoterpenes or transition metal complexes thereof in asymmetric syntheses.
Novel chiral diphosphine ligands with a pinene core obtained via an allylphosphinite–allylphosphine oxide rearrangement
作者:Andrei Gavryushin、Kurt Polborn、Paul Knochel
DOI:10.1016/j.tetasy.2004.05.045
日期:2004.7
A number of new chiral diphosphine ligands with a pinene framework were synthesized and tested in some transition metal-catalyzed asymmetric reactions (enantioselectivities up to 84% ee were achieved). The [2,3]-sigmatropic allylphosphinite–allyl phosphine oxide rearrangement was applied as a key step of the synthesis. An improved procedure for the phosphine oxide reduction and a new protocol for the