The concise synthesis of axially chiral biaryl diphosphine ligands by the rhodium-catalyzed intramolecular [2 + 2 + 2] cycloaddition of hexayne diphosphine oxides has been achieved. These newchiral diphosphine ligands could be employed as a ligand for the rhodium-catalyzed asymmetric catalyses.
AXIALLY ASYMMETRIC PHOSPHORUS COMPOUND AND PRODUCTION METHOD THEREOF
申请人:TANAKA Ken
公开号:US20110218345A1
公开(公告)日:2011-09-08
[Problem to be Solved] To provide an axially asymmetric optically active biarylphosphorus compound that can easily produced without the step of optical resolution which was almost indispensable in conventional methods.
[Means for Solving the Problems] A method for producing an axially asymmetric phosphorus compound represented by the general formula (1), comprising a cycloaddition reaction of a compound having a triple bond with the use of a catalyst containing rhodium metal and an optically active bisphosphine.
(In the formula (1), R
1
and R
2
may be the same or different and independently are an alkyl group optionally having a substituent group, a cycloalkyl group optionally having a substituent group, an aryl group optionally having a substituent group, an alkoxy group optionally having a substituent group or an aryloxy group optionally having a substituent group; * is axial asymmetry.)