Process for hydrogenating unactivated imines using ruthenium complexes as catalysts
申请人:Abdur-Rashid Kamaluddin
公开号:US20050209487A1
公开(公告)日:2005-09-22
A process is provided for the hydrogenation or asymmetric hydrogenation of dialkyl, alkylalkenyl and dialkenyl imines of formula (II) to provide amines of formula (III), wherein, (i) R
1
and R
2
are optionally substituted cyclic, linear or branched alkyl or alkenyl; R
3
is a hydrogen atom, a hydroxy radical, optionally substituted C
1
to C
8
cyclic, linear or branched alkyl or alkenyl, optionally substituted aryl; or (ii) R
1
is alkyl or alkenyl, R
2
is alkyl or alkenyl and the two are linked together or with R
3
to form one or more rings; using a catalytic system comprising a base and a ruthenium complex containing (1) a diamine and (2) a diphosphine ligand or monodentate phosphine ligands in hydrogenation and asymmetric hydrogenation processes.
提供了一种用于二烷基、烷基烯基和二烯基亚胺(式(II))的氢化或不对称氢化的过程,以提供式(III)的胺。其中,(i)R1和R2是可选取代的环状、线性或支链烷基或烯基;R3是氢原子、羟基自由基、可选取代的C1到C8环状、线性或支链烷基或烯基、可选取代的芳基;或(ii)R1是烷基或烯基,R2是烷基或烯基,并与R3连接在一起形成一个或多个环。使用催化系统,包括碱和含有(1)二胺和(2)二膦配体或单齿膦配体的钌配合物,在氢化和不对称氢化过程中进行。