摘要:
Mixtures of m- and p-dichlorobenzene can be separated by treating such mixtures in the liquid phase with a pentasil zeolite at from 20.degree. to 250.degree. C., a filtrate enriched in m-dichlorobenzene being removed and the p-dichlorobenzene being obtained by desorption of the pentasil zeolite. The pentasil zeolites may contain, as exchangeable cations, protons, cations of the first or second main group of the Mendeleev Periodic System, cations of the rare earth metals or a mixture of a plurality thereof. In order to prepare the liquid phase a solvent is used that belongs to the group of cyclic saturated hydrocarbons having 5 to 15 carbon atoms, alkyl-substituted aromatic hydrocarbons having 8 to 12 carbon atoms, and halogen-substituted aromatic hydrocarbons having 6 to 10 carbon atoms and 1 to 3 halogen atoms. The solvents ethylbenzene, chlorobenzene, p-xylene, p-chlorotoluene and dichlorobenzene are excepted. A mixture of a plurality of these solvents may also be used.
摘要:
The invention relates to substituted dihydroquinazolines and to processes for their preparation and also to their use for preparing medicaments for the treatment and/or prophylaxis of diseases, in particular for use as antiviral agents, in particular against cytomegalo viruses.
摘要:
The present application relates to novel aryl- or heteroaryl-substitued pyrido[2,3-d] pyrimidines of formula (I), pharmaceuitical compositions of the same, and a process for their preparation. Formula(I) is: wherein Ar is an aryl or heteroaryl substituent, and R1, R2, R3, Ar, D, and E are as defined in the specification. Compounds and compositions of the present invention can be used in the treatment and/or prophylaxis of various disorders in humans and animals, including aldosteronism, high blood pressure, chronic heart failure, the sequelae of a myocardial infarction, cirrhosis of the liver, renal failure, and stroke.
摘要:
The present application relates to novel 7-sulfanylmethyl-, 7-sulfinylmethyl- and 7-sulfonylmethylindole derivatives, processes for the preparation thereof, the use thereof alone or in combinations for the treatment and/or prevention of diseases, and the use thereof for the manufacture of medicaments for the treatment and/or prevention of diseases, especially for the treatment and/or prevention of cardiovascular disorders.
摘要:
The present application relates to novel 3-cyanoalkyl- and 3-hydroxyalkyl-substituted indole derivatives, to processes for preparation thereof, to the use thereof alone or in combinations for treatment and/or prevention of diseases, and to the use thereof for production of medicaments for treatment and/or prevention of diseases, especially for treatment and/or prevention of cardiovascular diseases.
摘要:
The invention relates to phenyl sulfoxides and sulfones and processes for their preparation, and to their use for producing medicaments for the treatment and/or prophylaxis of diseases, especially Alzheimer's disease.
摘要:
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.
摘要:
Enantiomerically pure sodium 3R,5S-(+)-erythro-(E)-7- 4-(4-fluorophenyl)-2,6-diisopropyl-5-methoxy-methyl-pyrid-3-yl!-3,5-dihydroxy-hept-6-enoate is prepared by initially cyclizing a corresponding racemic ester to give the racemic lactones and then separating the latter by chromatography on a chiral stationary phase. Cleavage of the enantiomerically pure lactones with the aid of a base yields the enantiomerically pure end products.
摘要:
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.
摘要:
Pure enantiomers of 5-nitrodihydropyridine of the formula ##STR1## are mixed, wherein one of the enantiomers has a high vasodilative action and a low negative inotropic activity on heart muscle, the other enantiomer has a low vasoconstrictive action and a high positive inotropic activity on heart muscle, the mixture being high in vasodilative activity and in positive inotropic activity on heart muscle.