摘要:
A process for the preparation of the enantiomeric pairs (1R-3R-.alpha.S+1S-3S-.alpha.R) and (1R-3S-.alpha.S+1S-3R-.alpha.R) from a mixture of all 8 stereoisomers of the compound .alpha.R/S-cyano-3-phenoxy-4-fluorobenzyl 3R/S-(2,2-dichlorovinyl)-2,2-dimethyl-1R/S-cyclopropanecarboxylate, comprising dissolving the mixture in a secondary or tertiary alkylamine having 2-6 C atoms per alkyl radical, subjecting the solution to crystallization whereby the enantiomeric pairs (1R-3R-.alpha.S+1S-3S-.alpha.R) and (1R-3S-.alpha.S+1S-3R-.alpha.R) crystallize out from the solution, and separating the crystallized material. The crystals are enriched in the most active components.
摘要:
A bearing arrangement for a shaft supporting a rotating tool is provided, with the shaft being rotatable on both sides of the tool at least indirectly in roller bearings, one of which can be removed for purposes of tool replacement together with an associated bearing sleeve slidable onto the free shaft end. The seating of the bearing sleeve, which is borne at least indirectly by the shaft, is formed by a conical outer surface tapering toward the shaft end. The bearing sleeve exhibit a conical borehole corresponding to the conical outer surface, and the bearing sleeve is radially expanded via a stop-limited axial shifting with respect to the conical outer surface by an amount to produce a specific level of reduced roller-bearing play.
摘要:
The invention relates to novel processes for the preparation of phenyl acetic acid derivatives of the formula (I) some of which are known ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 independently of each other each represent hydrogen, alkyl or alkoxy by ozonolysis of compounds of the formula (II) ##STR2## in which R.sup.4 represents hydrogen or methyl and oxidation of the reaction products obtained therefrom. The invention further relates to novel intermediates and a process for the preparation thereof.
摘要:
The present invention pertains to new substituted nitrogen heterocycles of general formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of each other, stand for hydrogen or alkyl, X stands for oxygen, sulfur or an NR.sup.3 group, Y stands for carbon (C or CH) or nitrogen, Z stands for an electron-attracting group, T stands for the remainder of an unsaturated ring system broken possibly by other heteroatoms or heteroatom groups, Q stands for possibly substituted aryl or possibly substituted hetaryl, wherein R.sup.3 stands for hydrogen, alkyl or alkenyl, method for preparing them and their use as pesticides.
摘要:
There are provided new substituted pyrazolines of the general formula (I) ##STR1## in which R.sup.1 represents optionally substituted phenyl and eitherR.sup.2 represents a radical of the formula --CO--R.sup.7, --COOR.sup.7 or --SO.sub.2 --R.sup.7,where R.sup.7 has the meaning given in the text of the application, andR.sup.3 represents hydrogen, alkyl or halogenoalkyl orR.sup.2 and R.sup.3 together with the nitrogen atom to which they are bonded represent a heterocycleR.sup.4 represents hydrogen, alkyl, halogenoalkyl, halogenoalkylthio, halogen, alkoxycarbonyl or in each case optionally substituted cycloalkyl or aryl,R.sup.5 represents hydrogen or alkyl,R.sup.6 represents in each case optionally substituted alkyl, cycloalkyl or 3,4-disubstituted phenyl andX represents oxygen or sulphur.The new substituted pyrazolines have a highly pronounced activity against animal pests, in particular against insects.
摘要:
A process for the preparation of a mixture principally comprising the(b) 1R-3R-.alpha.S+1S-3S-.alpha. and(d) 1R-3S-.alpha.S+1S-3R-.alpha.Renantiomers of the compound .alpha.-cyano-3-phenoxy-4-fluorobenzyl permethrate, comprising dissolving a mixture of all 8 stereoisomers of the compound .alpha.-cyano-3-phenoxy-4-fluorobenzyl permethrate in an alcohol having 2 to 4 carbon atoms, adding a secondary or tertiary alkyl amine having 2-6 carbon atoms in each alkyl moiety and allowing the mass to crystallize, whereby the desired mixture of enantiomers b) and d) crystallizes out of the solution.
摘要:
The method describes a novel production method for coated particles made of rubber granules, the coating, the particles thus coated, and the use of the coated particles.
摘要:
This invention relates to novel substituted 4-pyrazolylpyrazolines of formula (I) in which R1, R2, R3 and R4 are as defined in the disclosure, to a plurality of processes for preparing these substances and their use for controlling pests, and to novel intermediates and processes for their preparation.
摘要:
The phytotoxic action of too high a concentration of peroxygen compounds such as peroxycarboxylic acids and hydrogen peroxide in the combating of phytopathogenic microorganisms, such as fusaria, in the water systems of plant irrigation systems, especially greenhouses, can be eliminated. The water is treated with a peroxycarboxylic acid solution which is brought in contact with a solid decomposition catalyst for active-oxygen compounds before the water is used for irrigation, in order to reduce the content of peroxycarboxylic acid and hydrogen peroxide. The water contacts and flows through a fixed bed of decomposition catalyst, by trickling over it or flowing through the conduits of a monolithic block coated with a decomposition catalyst such as platinum, palladium or rhodium.
摘要:
The invention describes a novel production process for coated particles composed of granulated-rubber material, the coating, the particles coated therewith and the uses of the coated particles. The coating formulation is solvent-free.