Method of asymmetrically hydrosilylating substrates using catalysts having a ligand of the compound of the formula (I)
wherein
R is optionally substituted alkyl, cycloalkyl, aryl or heteroaryl;
R′ is hydrogen, optionally substituted lower alkyl; and
R″ is hydrogen, halogen, optionally substituted alkyl, hydroxy, amino (e.g., primary, secondary or tertiary), alkenyl;
or an enantiomer thereof; or an enantiomeric mixture thereof with a transition metal. Particularly suitable reactions include the asymmetric hydrosilylation of ketones.
PROCESS FOR THE CARBONYLATION OF ETHYLENICALLY UNSATURATED COMPOUNDS, NOVEL CARBONYLATION LIGANDS AND CATALYST SYSTEMS INCORPORATING SUCH LIGANDS
申请人:Eastham Graham Ronald
公开号:US20120330016A1
公开(公告)日:2012-12-27
A novel bidentate ligand of general formula (I) is described together with a process for the carbonylation of ethylenically unsaturated compounds. The group X
1
may be defined as a univalent hydrocarbyl radical of up to 30 atoms containing at least one nitrogen atom having a pKb in dilute aqueous solution at 18° C. of between 4 and 14 wherein the said at least one nitrogen atom is separated from the Q
2
atom by between 1 and 3 carbon atoms. The group X
2
is defined as X
1
, X
3
or X
4
or represents a univalent radical of up to 30 atoms having at least one primary, secondary or aromatic ring carbon atom wherein each said univalent radical is joined via said at least one primary, secondary or aromatic ring carbon atom(s) respectively to the respective atom Q
2
. Q
1
and Q
2
each independently represent phosphorus, arsenic or antimony.
The present invention relates to a process for preparing phosphorus compounds and intermediates.
本发明涉及一种制备磷化合物和中间体的方法。
Verfahren zur Herstellung von Phosphorverbindungen
申请人:Bayer Chemicals AG
公开号:EP1475384A1
公开(公告)日:2004-11-10
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Phosphorverbindungen und Zwischenprodukten.
这项发明涉及一种制备磷化合物和中间体的方法。
Ligands for use in catalytic processes
申请人:Deblon Stephan
公开号:US20050107608A1
公开(公告)日:2005-05-19
The invention relates to novel phosphorus compounds, to a method for producing said phosphorus compounds and their intermediate products. The invention also relates to the catalysts produced according to the invention on the basis of the phosphorus compounds and to their use in catalytic processes, especially in asymmetric catalytic processes.