申请人:SHENZHEN CATALYS TECHNOLOGY CO., LTD.
公开号:EP3730502A1
公开(公告)日:2020-10-28
The present invention relates to the technical field of chiral synthesis, and specifically provides the synthesis and use of a new type of oxa-spirodiphosphine ligands. The bisphosphine ligand is prepared with oxa-spirobisphenol as a starting material after triflation, palladium catalyzed coupling with diaryl phosphine oxide, reduction of trichlorosilane, further palladium catalyzed coupling with diaryl phosphine oxide, and further reduction of trichlorosilane. The oxa-spiro compound has central chirality, and thus includes L-oxa-spirodiphosphine ligand and R-oxa-spirodiphosphine ligand. The racemic spirodiphosphine ligand is capable of being synthesized from racemic oxa-spirobisphenol as a raw material. The present invention can be used as a chiral ligand in the asymmetric hydrogenation of unsaturated carboxylic acids. The complex of the ligand with ruthenium can achieve an enantioselectivity of greater than 99% in the asymmetric hydrogenation of methyl-cinnamic acid.
本发明涉及手性合成技术领域,具体提供了一种新型氧杂螺二膦配体的合成和使用方法。该双膦配体以噁螺二酚为起始原料,经三氟化反应、钯催化与二芳基氧化膦偶联、三氯硅烷还原、进一步钯催化与二芳基氧化膦偶联、三氯硅烷进一步还原制备而成。氧杂螺二膦化合物具有中心手性,因此包括 L-氧杂螺二膦配体和 R-氧杂螺二膦配体。外消旋螺二膦配体能够以外消旋氧杂螺二酚为原料合成。本发明可作为手性配体用于不饱和羧酸的不对称氢化反应。在甲基肉桂酸的不对称氢化反应中,配体与钌的配合物的对映体选择性大于 99%。