Abstract: Azo dyestuffs of the formula ##STR1## wherein R.sub.1 denotes acyl,R.sub.2 denotes hydrogen, fluorine, chlorine or trifluoromethyl,R.sub.3 denotes hydrogen, optionally substituted C.sub.1 -C.sub.4 -alkyl, cyclohexyl or optionally substituted phenyl andR.sub.4 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl groupare suitable for dyeing natural and synthetic fibre materials, for example for dyeing wool or polyamide fibres, in level read to violet shades with very good fastnesses to light, wet processing and perspiration, the color yield being good.

Abstract: (Meth)-acrylic acid esters of the formula ##STR1## in which R.sup.1 and R.sup.2 are each independently hydrogen, chlorine, fluorine or a C.sub.1 - to C.sub.4 -alkyl radical andR.sup.3 and R.sup.4 are identical or different and represent the group ##STR2## wherein Y is a divalent bridge member from the group ##STR3## and Z is a straight-chain or branched hydrocarbon chain which has 2 to 10 carbon atoms, can optionally contain oxygen bridges and is optionally substituted by 1 to 4 acrylate or methacrylate radicals,whereinR.sup.5 represents hydrogen or methyl andR.sup.6 represents hydrogen, C.sub.1 -C.sub.6 - alkyl or phenyl,which are useful as dental materials.

Abstract: The new compound ##STR1## is prepared and converted to the new acetal ##STR2## which is reacted with an alkali phenolate or alkaline earth metal phenolate in the presence of copper or a copper compound as a catalyst and in the presence of a diluent at a temperature between about 100.degree. and 200.degree. C. to produce the new acetal ##STR3## which can be hydrolyzed to the corresponding aldehyde which is a known intermediate for pyrethroid-like insecticides.

Abstract: Pyrimidines substituted in the 5-position by fluorine, some of which are new, are prepared from pyrimidines of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote fluorine or trifluoromethyl,by stepwise reaction with hydrogen chloride.

Abstract: A 2,4-dihalogenobenzoyl-(thio)urea of the formula ##STR1## in which X represents sulphur or oxygen,X.sup.1 and X.sup.2 are identical or different and represent fluorine, chlorine, bromine or iodine,R.sup.1 represents hydrogen, halogen or optionally substituted radicals from the series comprising alkyl, alkoxy and alkylthio,R.sup.2 represents hydrogen, halogen, cyano, nitro, or optionally substituted radicals from the series comprising alkyl, alkylthio, alkylsulphonyl, alkoxy, aryloxy, alkylcarbonyl, alkoxycarbonyl, alkoxycarbonylalkyl and alkoxycarbonylalkylthio, orR.sup.1 and R.sup.2 together represent an optionally substituted alkylenedioxy radical or --CF.sub.2 --O--CF.sub.2 --O--,R.sup.3 represents hydrogen, halogen or an optionally substituted alkyl, alkoxy or aryloxy radical, andR.sup.4 represents hydrogen, halogen, or optionally substituted radicals from the series comprising alkyl, alkylthio and alkoxy, with the exception of those cases in which X represents oxygen, X.sup.1 andX.sup.

Abstract: 5-Halogenoalkyl-1,3,4-thiadiazol-2-yloxyacetamides of the formula ##STR1## in which R.sup.1 is halogenoalkyl, with the exception of trifluoromethyl, andR.sup.2 and R.sup.3 each independently is hydrogen, alkyl, alkenyl, alkinyl, in each case optionally substituted cycloalkyl or cycloalkenyl, halogenoalkyl, alkoxyalkyl, alkoxyalkylenoxy, alkoxy, aralkyl or optionally substituted aryl, orR.sup.2 and R.sup.3, together with the nitrogen atom to which they are bonded, form an optionally substituted heterocyclic radical which can contain further hetero-atoms,which possess herbicidal and fungicidal activity. The intermediates 5-chlorodifluoromethyl- and 5-dichlorofluoromethyl-2-chloro-1,3,4-thiadiazole are also new.

Abstract: 5-fluorocytosine is prepared by reacting 2,5-difluoro-4-chloro-pyrimidine with a proton acid in the presence of water to yield 2-hydroxy-4-chloro-5-fluoropyrimidine and reacting the 2-hydroxy-4-chloro-5-fluoropyrimidine with ammonia to yield 5-fluoro-cytosine.

Abstract: Substituted furazans of the formula ##STR1## in which R and R.sup.1 are identical or different and represent optionally substituted aromatic or heteroaromatic radicals,R.sup.2 represents hydrogen, an OH or COOH grouping or an optionally substituted radical from the series comprising alkyl, alkoxy, cycloalkyl, cycloalkenyl, alkoxycarbonyl, alkoxythiocarbonyl, alkylsulphonyl, arylsulphonyl and aralkyl,Y represents oxygen or an S(O).sub.m, --CR.sup.3 R.sup.4, CO or NR.sup.5 grouping,in whichm represents the number 0, 1 or 2 andR.sup.3, R.sup.4 and R.sup.5 are identical or different and represent hydrogen or alkyl,n represents the number 0 or 1 andX represents oxygen or sulphur,and wherein, ifR represents phenyl,R.sup.1 represents phenyl,R.sup.2 represents hydrogen andX represents oxygen or sulphur,thenn represents the number 1,or ifn represents the number 0,R represents 4-bromophenyl,R.sup.1 represents 4-chlorophenyl andR.sup.2 represents hydrogen,thenX represents sulphur,which possess pesticidal activity.

Abstract: Herbicidally active substituted 5-acylamino-1-phenylpyrazoles of the formula ##STR1## in which R.sup.1 represents cyano, alkoxycarbonyl, alkenyloxycarbonyl, alkinyloxycarbonyl, aminocarbonyl, alkylaminocarbonyl, alkenylaminocarbonyl or alkinylaminocarbonyl,R.sup.2 represents hydrogen, alkyl, alkenyl, alkinyl, optionally substituted cycloalkyl, alkoxyalkyl, alkylthioalkyl, halogenoalkyl or optionally substituted aryl andR.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7, which are identical or different, represent hydrogen, halogen, cyano, nitro, alkyl, alkoxy, alkylsulphonyl, alkoxycarbonyl or a radical --(X).sub.n --R.sup.8,whereinX represents oxygen, sulphur, sulphinyl or sulphonyl,n represents 0 or 1 andR.sup.8 represents halogenoalkyl,with the proviso that at least one of the radicals R.sup.3, R.sup.4, R.sup.5, R.sup.6 or R.sup.7 represents a radical --(X).sub.n --R.sup.8, but R.sup.1 does not represent cyano if R.sup.5 represents trifluoromethyl. Many of the intermediates are novel.

Abstract: (Meth)-acrylic acid esters of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen, chlorine, fluorine or a C.sub.1 - to C.sub.4 -alkyl radical andR.sup.3 and R.sup.4 are identical or different and represent the group ##STR2## wherein R.sup.5 and R.sup.6 are identical or different and denote hydrogen or methyl,Z denotes a straight-chain or branched C.sub.2 - to C.sub.8 -alkylene chain andn denotes values from 1 to 4. Such (meth)-acrylic acid esters can be used as dental fillers or to coat teeth.

Abstract: Novel substituted pyridyl-phenyl ethers of the formula ##STR1## in which X represents trifluoromethyl or chlorine,Y represents hydrogen or chlorine,R.sup.1 represents hydrogen or methyl andR.sup.2 represents formyl or the radicals of the formulae ##STR2## in which R.sup.3 represents alkyl with 1 to 4 carbon atoms, or the two radicals R.sup.3 together represent an alkylene chain with 2 or 3 carbon atoms,R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently of one another represent hydrogen or alkyl with 1 to 4 carbon atoms,m represents 1 or 2,n represents 0 or 1 andZ represents trimethylsilyl, optionally substituted azolyl which is bonded via nitrogen or the radicals of the formulae ##STR3## in which R.sup.8 represents alkyl with 1 to 4 carbon atoms,or the two radicals R.sup.8 together represent an alkylene chain with 2 or 3 carbon atoms,R.sup.9 represents alkyl with 1 to 4 carbon atoms,X.sup.1 represents oxygen or sulphur andR.sup.10 and R.sup.

Abstract: 2,4-Diamino-6-halogeno-5-alkylthio-pyrimidines of the general formual (I) ##STR1## in which X represents halogen,R.sup.1 represents alkyl which is optionally substituted by halogen,R.sup.2 represents hydrogen or alkyl,R.sup.3 represents hydrogen, alkyl or alkoxyalkyl,R.sup.4 represents hydrogen or alkyl,Z represents a branched or straight-chain alkylene group andR.sup.5 represents alkyl,process for their preparation and their use as plant protecting agent, particularly as herbicides and fungicides.

Abstract: New 3-substituted 1-azolyl-3-methyl-1-phenoxy-butan-2-ones and -ols of the general formula ##STR1## in which Az represents 1,2,4-triazol-1-yl, 1,2,4-triazol-4-yl or imidazol-1-yl,B represents the keto group or the CH(OH) group,Y represents oxygen or sulphur,R represents halogenoalkyl, optionally substituted phenyl or optionally substituted benzyl, or provided Y represents sulphur, may represent alkyl andX.sup.1, X.sup.2 and X.sup.3 are selected independently and each represent hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, alkylthio, alkylsulphonyl, nitro, cyano, alkoxycarbonyl or optionally substituted phenyl,are obtained if halogenoether ketones are reacted with 1,2,4-triazole or imidazole in the presence of a diluent and of an acid-binding agent, and, if appropriate, the keto derivatives thus obtained are reduced.

Abstract: The new compound ##STR1## is prepared and converted to the new acetal ##STR2## which is reacted with an alkali phenolate or alkaline earth metal phenolate in the presence of copper or a copper compound as a catalyst and in the presence of a diluent at a temperature between about 100.degree. and 200.degree. C. to produce the new acetal ##STR3## which can be hydrolyzed to the corresponding aldehyde which is a known intermediate for pyrethroid-like insecticides.

Abstract: Partially hydrogenated derivatives of 2-nitro-1,1,1-trifluoroalkanes, in particular 2-oximino- and 2-hydroxylamino-1,1,1-trifluoroalkanes, are prepared by catalytically hydrogenating 2-nitro-1,1,1-trifluoroalkanes until a maximum of 2.2 moles of hydrogen per mole of 2-nitro-1,1,1-trifluoroalkane have reacted.

Abstract: Compounds of the formula ##STR1## and a process for their preparation by reacting the corresponding dioxo compound with at least 2 moles of phosphorus pentachloride.

Abstract: Herbicidally active 5-amino-1-phenyl-pyrazoles, most of which are new, of the formula ##STR1##

Abstract: 2,4-Diamino-6-halogeno-5-alkylthio-pyrimidines of the general formula (I) ##STR1## in which X represents halogen,R.sup.1 represents alkyl which is optionally substituted by halogen,R.sup.2 represents hydrogen or alkyl,R.sup.3 represents hydrogen, alkyl or alkoxyalkyl,R.sup.4 represents hydrogen or alkyl,Z represents a branched or straight-chain alkylene group andR.sup.5 represents alkyl,process for their preparation and their use as plant protecting agent, particularly as herbicides and fungicides.

Abstract: Compounds of the formula ##STR1## in which R.sup.1 is hydrogen, halogen or alkyl,R.sup.2 is halogen, alkyl or alkylthio,X is oxygen or sulphur, andY is hydrogen, halogen, alkyl or halogenoalkyl,which possess pesticidal activity.

Abstract: Aromatic compounds which contain perfluorinated side-chains bonded via a heteroatom are prepared by treating aromatic compounds, which contain side-chains which are perhalogenated, but only partially fluorinated, and bonded via heteroatom, with a catalyst capable of transferring halogen atoms.