Cassella Aktiengesellschaft

Hoechst Aktiengesellschaft

Ticona Gmbh

Hanss-Jerg Kleiner

Ulrich Riegel

Friedrich Engelhardt

Heinz Erpenbach

Fritz Engelhardt

Erhard Jagers

Gerlinde Ebert

Manfred Bohshar

Hans-Peter Koll

Wolf-Dieter Muller

The invention relates to a process for the preparation of phosphorus-containing compounds of the formula (I) ##STR1## where R.sup.1 and R.sup.2 are identical or different and are a straight-chain or branched alkyl radical having 1 to 8 carbon atoms, a cyclohexyl-, cyclopentyl-, aryl-, halogen-, (C.sub.1 -C.sub.6)-alkyl- or (C.sub.1 -C.sub.6)-alkoxy-substituted aryl radical, where R.sup.1 and R.sup.2, together with the phosphorus atom and the oxygen atom, can also form a ring, in particular an oxaphosphorin ring, which comprises metering acrylonitrile at elevated temperature into a compound of the formula (II) ##STR2## where R.sup.1 and R.sup.2 are as defined above.

Process for the preparation of 2-cyanoethylphosphinic esters

The present invention relates to a hydrophilic, highly swellable hydrogel based on (co)polymerized hydrophilic monomers or based on graft (co)polymers, characterized in that it has been surface-modified by means of a mixture of

Hydrophilic, highly swellable hydrogels

The present invention relates to the use of compounds of the general formula I ##STR1## in which R denotes alkyl, alkenyl or aryl, which can be optionally substituted, as crosslinkers in the preparation of hydrogels, and to the hydrogels thus prepared and their use.

Use of glycidyl phosphonates as crosslinkers in the preparation of

In order to prepare N-acylphosphinothricin diesters, acetals of methyl-(3-oxopropyl)phosphinic acid esters of the formula ##STR1## are reacted in a dipolar aprotic solvent with a carboxylic acid amide and carbon monoxide in the presence of hydrogen gas using a cobalt compound as a catalyst, where the radical R' is alkyl or aryl or aralkyl.

Process for the preparation of N-acylphosphinothricin diesters

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Kronberg, Germany

Hanss-Jerg Kleiner