Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1996-02-23
1998-07-07
Cooney, Jr., John M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 53, 528 62, C08G 1828
Patent
active
057770620
ABSTRACT:
The invention relates to polymers having structural repeating units of at least one monomer MM which contains a hydroxyl group or a primary or secondary amine group as a functional group bonded directly or in a side chain, wherein the functional group is bonded via a bridge group Q formed by a diisocyanate to the hydroxyl group or primary or secondary amino group of an aliphatic, cycloaliphatic, heterocycloaliphatic, aromatic or heteroaromatic ditertiary diphosphine, the phosphine groups of which are bonded to a carbon chain in the 1,2-, 1,3-, 1,4- or 1,5-position relative to one another. The invention also relates to a process for their preparation and to rhodium and iridium complexes with these diphosphine ligands. Using these rhodium and iridium complexes, optically pure compounds which are valuable intermediates for the preparation of biologically active ingredients, in particular in the field of pharmaceuticals and agrochemicals, can be obtained in a hydrogenation process which is likewise according to the invention. Thus, for example, it is possible to prepare from secondary amines, in particular N-carbalkoxymethylamines, 5-imidazolecarboxylic acid derivatives which have a herbicidal action and can be used for weed control (EP-A-0 207 563). The optically pure (.alpha.-aminocarboxylic acid esters are suitable for peptide syntheses.
After the hydrogenation, the catalysts can easily be separated off, if appropriate purified and re-used.
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Cooney Jr. John M.
Novartis Corporation
Teoli, Jr. William A.
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