Process for Transition Metal-Catalyzed Asymmetric Hydrogenation of Acrylic Acid Derivatives, and a Novel Catalyst System for Asymmetric Transition Metal Catalysis
申请人:Boogers Jeroen
公开号:US20070293691A1
公开(公告)日:2007-12-20
A process for transition metal-catalyzed, asymmetric hydrogenation of acrylic acid derivatives of the formula (I) in which R1 is H or an optionally substituted alkyl, aryl or heteroaryl radical, R2 is an optionally substituted alkyl, aryl or heteroaryl radical, and R3 is H or a C
1
-C
6
-alkyl radical, which comprises hydrogenating compounds of the formula (I), optionally in a solvent, in the presence of one or more hydrogen donors, using a catalyst system which comprises a transition metal from the group of ruthenium, rhodium and iridium and a combination of a chiral phosphorus ligand of the formula (II) in which Cn, together with the two oxygen atoms and the phosphorus atom, forms an optionally substituted ring having from 2 to 6 carbon atoms and R4 is an optionally substituted alkyl, aryl, alkoxy or aryloxy radical or NR5R6 where R5 and R6 may each independently be H or an optionally substituted alkyl, aryl, aralkyl or alkaryl radical, or, together with the nitrogen atom, may form a ring, and an achiral phosphine ligand of the formula (III) in which R is an optionally substituted alkyl or aryl radical, to the corresponding compounds of the formula (IV) in which R1, R2 and R3 are each as defined above, and also a novel catalyst system for asymmetric transition metal catalysis.
一种用于过渡金属催化的不对称氢化丙烯酸衍生物的方法,其化学式为(I),其中R1为H或可选择取代的烷基、芳基或杂环芳基基团,R2为可选择取代的烷基、芳基或杂环芳基基团,R3为H或C1-C6烷基基团。该方法包括在一个或多个氢供体的存在下,使用来自钌、铑和铱组的过渡金属催化剂体系,以及由式(II)的手性磷配体和式(III)的非手性膦配体的组合催化剂体系,在可选的溶剂中氢化式(I)的化合物,从而得到式(IV)的相应化合物,其中R1,R2和R3如上所定义,同时也得到了一种新的不对称过渡金属催化剂体系。