Designing P-Chirogenic 1,2-Diphosphinobenzenes at Both P-Centers Using P(III)-Phosphinites
作者:Jérôme Bayardon、Yoann Rousselin、Sylvain Jugé
DOI:10.1021/acs.orglett.6b01275
日期:2016.6.17
synthesis of P-chirogenic 1,2-diphosphinobenzenes (DP*B) bearing the chirality on one or both phosphorus centers is reported using aryne chemistry. The principle is based on successive reactions of 1,2-dibromobenzene with sec-phosphide boranes, then DABCO to remove the borane, and finally with chlorophosphines or P(III)-chirogenic phosphinites. The efficiency of this synthesis was demonstrated by the stereoselective
Olefin Hydrogenation with Rigid Mono-<i>P</i>-stereogenic Diphosphines: A Flexible Rhodium Ring to Rule Them All?
作者:Slavko Rast、Michel Stephan、Barbara Mohar
DOI:10.1002/ejoc.201403570
日期:2015.4
The preparation of a rigid C1-symmetric P-stereogenic diphosphine series possessing a P-o-diphenylphosphinophenyl moiety and its use in RhI-catalyzed hydrogenation of benchmark olefins, is presented. This simplified ligand design, wherein some specific features (backbone flexibility, identical nature of P,P′-substituents) of related C2-symmetric ethylene-bridged diphosphines were knocked out, is a