Practical Synthesis of Chiral Vinylphosphine Oxides by Direct Nucleophilic Substitution. Stereodivergent Synthesis of Aminophosphine Ligands
作者:Marco Oliana、Frank King、Peter N. Horton、M. B. Hursthouse、King Kuok (Mimi) Hii
DOI:10.1021/jo052575q
日期:2006.3.1
A practical synthesis of opticallypure alkylphenylvinylphosphine oxides is described, utilizing a nucleophilic displacement at phosphorus to install the vinyl moiety. The products were used to prepare classes of P-stereogenic aminophosphine (PN) and aminohydroxyphosphine (PNO) ligands. Stereocontrol can be exerted at various stages of the synthesis, to provide specific combinations of chirality in
Various chiral secondary alcohols have been used to study the dependence of the stereochemical outcome of sulfinate and phosphinate ester synthesis on the nature of the base used to catalyse the reaction. From this study it has been shown that the achiral stereodirecting base effect determined in the DAG methodology is a general behaviour in the asymmetricsynthesis of sulfinate and phosphinate esters