Abstract: The present invention relates to the use of optically active polymers of N-acryloyl-phenylalanine neomenthylamide as such, in crosslinked form and/or in carrier-bonded form as stationary phases for the chromatographic separation of enantiomers of lactones.

Abstract: Polyhalogenated cinnamic acids and cinnamic acid derivatives are prepared by reacting diazonium salts accessible from polyhalogenated anilines with acrylic acid or acrylic acid derivatives in the presence of a homogeneous, palladium-containing catalyst at about −5 to about +100° C. Some of the cinnamic acids and cinnamic acid derivatives obtainable in this way are new. Cinnamic acids and cinnamic acid derivatives which can be prepared according to the invention can be used for the preparation of indanones which are precursors for agro- and pharmaceutical chemicals and for substances having liquid-crystalline properties.

Abstract: The invention relates to the preparation and use as catalysts of diphosphines of the formula (I) 1

Abstract: The invention relates to a process for the preparation of nitrosobenzenes from aromatic amines by oxidation with hydrogen peroxide in the presence of sodium molybdate dihydrate and an inert organic solvent.

Abstract: The present invention relates to the use of optically active polymers of N-acryloyl-phenylalanine neomenthylamide as such, in crosslinked form and/or in carrier-bonded form as stationary phases for the chromatographic separation of enantiomers of lactones.

Abstract: The invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogenobenzenes with aromatic amines in the presence of a palladium catalyst and a base, the base being ground and/or dried before its use.

Abstract: The invention relates to chiral polymers which are bonded to a support and have improved properties, a process for the preparation of these materials and their use as chiral stationary phases in the chromatograhic separation of optical isomers, in particular of racemates into their enantiomers.

Abstract: The invention relates to a bridge crane and more particularly ship's bridge crane, comprising a bridge, which has two transverse bearers extending parallel to one another and constituting a track for the travelling crane and folding lateral parts, respectively pivoted at the ends of the bearers, for the selective extension of the track. In accordance with the invention the lateral parts are able to be folded from a position, in which they are in alignment with the transverse bearers, through 90.degree. into their inactive position, in which tips thereof are directed towards the respectively other transverse bearer.

Abstract: The invention relates to new optically active sulphur-containing amino acid derivatives, a process for their preparation, their polymerization to give optically active polymers and the use of these optically active polymers as adsorbents for chromatographic separation of racemates into enantiomers.

Abstract: The invention relates to new optically active amino acid derivatives of the general formula (I) ##STR1## in which n, R, R.sub.1, R.sub.2, R.sub.3, X and A have the meaning given in the description, which amino acid derivatives contain sulphoxide or sulphone groups, to two basic synthetic routes for the preparation from sulphur-containing amino acids, to the polymerization of these monomers and to the use of the polymers as optically active adsorbents for chromatographic resolution of racemates to give the enantiomers.

Abstract: The invention relates to new optically active sulphur-containing amino acid derivatives, a process for their preparation, their polymerisation to give optically active polymers and the use of these optically active polymers as adsorbents for chromatographic separation of racemates into enantiomers.

Abstract: The invention relates to new optically active sulphur-containing amino acid derivatives, a process for their preparation, their polymerization to give optically active polymers and the use of these optically active polymers as adsorbents for chromatographic separation of racemates into enantiomers.

Abstract: The invention relates to new optically active amino acid derivatives of the general formula (I) ##STR1## in which n, R, R.sub.1, R.sub.2, R.sub.3, X and A have the meaning given in the description, which amino acid derivatives contain sulphoxide or sulphone groups, to two basic synthetic routes for the preparation from sulphur-containing amino acids, to the polymerization of these monomers and to the use of the polymers as optically active adsorbents for chromatographic resolution of racemates to give the enantiomers.

Abstract: .alpha.-Fluoro-substituted N-acryloylamino acid derivatives of the formula ##STR1## are used to make polymers optionally for chromatographic resolution of racemates into their enantiomers. The fluorine atom improves performance in many instances.

Abstract: The invention relates to optically active, pressurestable bead polymers containing fillers, and their use as adsorbents for the chromatographic resolution of enantiomeric mixtures (or racemates) into their enantiomers.

Abstract: The invention relates to new optically active sulphur-containing amino acid derivatives, a process for their preparation, their polymerisation to give optically active polymers and the use of these optically active polymers as adsorbents for chromatographic separation of racemates into enantiomers.

Abstract: .alpha.-Fluoro-substituted N-acryloylamino acid derivatives of the formula ##STR1## are used to make polymers optionally for chromatographic resolution of racemates into their enantiomers. The fluorine atom improves performance in many instances.

Abstract: An optically active N-(meth)acryloyl amino acid amide of the formula ##STR1## in which R is hydrogen or methyl,R.sub.1 represents an optionally substituted alkyl, cycloalkyl, aralkyl, aryl or heteroaryl radical,R.sub.3 represents hydrogen or denotes together with R.sub.1 a tri- or tetramethylene group;X denotes oxygen or a NR.sub.4 -group wherein R.sub.4 represents hydrogen or alkyl or denotes together with R.sub.2 and the nitrogen atom a 5- to 7-membered ring which ring is optionally substituted by the group COO-alkyl (1-6 carbon atoms) or by one or two alkyl radicals (1-4 carbon atoms) andR.sub.2 denotes a strongly space-filling hydrocarbon radical.The amide is polymerized and optionally bound to a support such as silica, and can then be used for the chromatographic separation of racemic mixtures of pharmacologically active compounds.

Abstract: Difluoropropionic acid and derivatives thereof are prepared by bringing elemental fluorine in the presence of a solvent into an addition reaction with appropriate acrylic acids or derivatives thereof. In this way, it is also possible to obtain novel fluorinated esters of 2,3-difluoropropionic acid.

Abstract: A crane is provided which comprises a hoisting mechanism, which comprises a hoisting rope and a hoisting rope winch. A winch drive for the hoisting rope or a torque-limiting coupling connected between said winch drive and said winch is so controlled that in a period of time which preferably exceeds one second to the rope-pulling force exerted on the hoisting rope is increased in steps or continuously to a value which corresponds to the weight of the load or is sufficient to hoist the load, and that the winch is adapted to be rotated in a payout sense by opposing forces which tend to pull the hoisting rope from the winch and which exceed the instantaneous rope-pulling force.