Abstract: The process for the preparation of 2-chlorobenzoxazoles of the formula ##STR1## wherein R.sup.1 and R.sup.2, independently of one another, are hydrogen or halogen comprising reacting a benzoxazolinone of the formula ##STR2## with a molar excess of phosphorus pentachloride.

Abstract: 2,4-Dinitrophenyl ethers are prepared by reacting a 2,4-dinitrochlorobenzene or 2,4-dinitrobromobenzene with an alkali metal alcoholate in a non-polar, inert solvent, at a temperature from -25.degree. C. to 50.degree. C.

Abstract: A process for preparation of diaryl sulphides by reaction of an aromatic diazonium salt in an alkaline medium with arenethiol is catalyzed by a non-metallic solid, such as charcoal, silica gel or aluminium oxide, having a specific surface of greater than or equal to 0.02 m.sup.2 /cm.sup.3.

Abstract: 1,4-dihydropyridines of the formula I ##STR1## wherein R.sup.1 denotes optionally substituted phenyl, pyridyl or thienyl, R.sup.2 denotes optionally substituted oxadiazolyl, thiadiazolyl or thiazolyl and R.sup.3 denotes hydrogen or --COOH, their preparation by a modified Hantzsch synthesis and their use as a calcium-agonist in pharmacy.

Abstract: Synthetic fiber materials are effectively colored by dyeing or printing with a dyestuff mixture containing at least two separate dyestuffs (I) and (II) in a weight ratio of (I):(II) of from (20 to 99):(80 to 1) wherein:(I) is at least one dyestuff of the formula ##STR1## and (II) is at least one dyestuff of the formula ##STR2## in which X and Y are the same or different and each is independently chloro and bromo:R.sup.1 and R.sup.

Abstract: 2-Mercaptobenzoxazoles of the formula ##STR1## wherein R is hydrogen or halogen and M is hydrogen or a metal atom, are prepared by reacting an ortho-aminophenol or metal salts thereof, with an alkali metal trithiocarbonate in aqueous solution.

Abstract: Tetrahydropyridazinones of the formula I ##STR1## wherein R denotes an optionally substituted carbocyclic or heterocyclic radical, R.sup.1 denotes hydrogen; alkyl; aralkyl, which is optionally substituted in the aryl part; or acyl, and R.sup.2 denotes hydrogen; alkyl, which can optionally be substituted; or optionally substituted phenyl; and their acid addition compounds, if these can be prepared.The tetrahydropyridazinone derivatives of the formula I according to the invention and their physiologically acceptable salts exhibit useful pharmacological actions.

Abstract: Dyestuff mixtures which contain dyestuffs (A) of the formula ##STR1## and dyestuff (B) of the formula ##STR2## in an (A):(B) weight ratio of (80 to 60):(20 to 40) useful for dyeing and printing hydrophobic fiber materials.

Abstract: This invention relates to certain 4-acyl-piperazine-1-acetamides. These compounds are useful as memory and learning enhancers and for the treatment and prevention of cerebral insufficiency.

Abstract: Aryl-substituted piperazinones and their physiologically-acceptable acid-addition salts have a useful nootropic action. They are administered enterally or parenterally in conventional dosage forms.

Abstract: Improvements in the fastness properties of substrates dyed with reactive dyestuffs are achieved by a dyeing after-treatment with an agent which is the reaction product polyethyleneimine and a bifunctional alkylating agent.

Abstract: Crosslinked copolymers wherein crosslinking is effected with crosslinking bridge members of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are each hydrogen or alkyl with 1 to 4 carbon atoms and m represents a number from 0 to 6 are prepared by copolymerization of monomers with vinylphosphonic acid (ester)-anhydrides and the new crosslinked polymers according to the invention are suitable for the preparation of acid-soluble coatings and encapsulation materials.

Abstract: The mixture of monoazo dyestuffs containing at least different individual dyestuffs of the formula ##STR1## wherein R.sup.1 is alkyl of 1 to 6 carbon atoms, cyclopentyl, cyclohexyl, fluoro, chloro, bromo, alkoxy of 1 to 4 carbon atoms or trifluoromethyl,R.sup.2 is alkyl of 1 to 3 carbon atoms andR.sup.3 and R.sup.4, independently of each other, are alkyl of 1 to 4 carbon atoms,is highly suitable for dyeing and printing hydrophobic materials.

Abstract: The crosslinked, porous copolymer in the form of beads and containing 50 to 99.9% by weight of recurring units of a heterocyclic 5-membered ring compound which contains a polymerizable olefinic group and which has at least one protonizable nitrogen atom in the ring, 0.1 to 50% by weight of units of a crosslinking agent, 0 to 25% by weight of units of a polymerizable organoboron or organosilicon compound and, relative to 100% by weight of the sum of the abovementioned units, 5 to 350% by weight of units of an N-vinylamide of the general formula I CH.sub.2 .dbd.CH--N(R.sup.1)--C(R.sup.2).dbd.O wherein R.sup.1 denotes hydrogen, methyl or ethyl and R.sup.2 denotes hydrogen or C.sub.1 -C.sub.3 -alkyl, or several such N-vinylamides and 0 to 40% by weight of units of another polymerizable compound or several such compounds, is prepared by inverted suspension polymerization and is used, for example, as a sorbent for acid substances from solutions thereof, preferably aqueous solutions.

Abstract: An improved process for production of discharge resist prints on textile material which contain hydrophobic fibers wherein at least one disperse dyestuff dischargeable to white discharge-resistant disperse dyestuff is applied, in the form of a dye liquor or printing paste, to the textile material and a discharge resist printing paste is printed on the material in the desired pattern, and the material is subsequently subjected to heat treatment at 100.degree. to 230.degree. C., wherein the improvement comprises the discharge resist printing paste containing, as the discharging agent, at least one salt of hydrogen sulphide, polysulphanes, compounds have a thiolate group of the formula --S.sup..crclbar. or a tautomerizable thio-group of the formula .dbd.S, and mixtures thereof.

Abstract: Azo dyestuff of the formula ##STR1## wherein X is secondary amino or tertiary amino moiety, useful for dyeing and printing hydrophobic fiber materials to produce a deep orange color having excellent fastness properties and also useful for coloring organic solvents, mineral oil products, waxes, plastics and surface coatings.

Abstract: A compound of the formula ##STR1## is reacted with a phenol of the formula ##STR2## in the presence of an acid to produce a heterocyclic phenyl ether of the formula ##STR3## wherein each R is independently selected from halogen, trifluoromethyl, nitro, cyano, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms or alkylthio having 1 to 4 carbon atoms;A is oxygen, sulfur or N-alkyl having 1 to 4 carbon atoms; andn is a number from 0 to 3.

Abstract: 1,4-dihydropyridines of the formula I ##STR1## in which R denotes, for example, --CO.sub.2 R.sup.3 or cyano, R.sup.1 denotes, for example, an optionally substituted phenyl, pyridyl or thienyl, R.sup.2 denotes the radical of a 5-membered, optionally substituted, ring having at least one double bond and at least 2 heteroatoms or heteroatom groups from the series comprising O, N, NH and S, and R.sup.3 denotes, for example, alkyl or alkoxyalkyl, and their acid addition salts, have valuable pharmacological properties.

Abstract: The crosslinked copolymer containing 75 to 99.9% by weight of recurring units of a pyridyl, quinolyl, isoquinolyl or pyrazinyl compound containing a polymerizable olefinic group, 0.1 to 25% by weight of units of a crosslinking agent and 0 to 25% by a weight of units of a polymerizable organosilicon and/or organoboron compound and, based on 100% by weight of the sum of the abovementioned units, 5 to 350% by weight of units of an N-vinyl-amide, is prepared by bead polymerization and used as a sorbent for acid substances from their aqueous solutions.

Abstract: Monoazo dyestuffs, free of carboxylic acid moieties or sulphonic acid moieties, of the formula ##STR1## wherein A and A' independently of one another are linear or branched alkylene having 2 to 6 carbon atoms;R is hydrogen, alkyl having 1 to 4 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, alkenyl having 3 to 5 carbon atoms, phenyl, benzyl, phenethyl, alkylcarbonyl having 1 to 4 atoms or benzoyl;m is a number from 1 to 5 and n is a number from 0 to 1.