摘要:
The invention relates to a process for preparing difluorobenzo-1,3-dioxole-5-carboxylic acid and derivatives thereof, and to the use thereof for preparing medicaments and crop protection agents.
摘要:
The invention relates to novel aminophenylmorpholinone derivates (I) in which S represents an optionally substituted morpholinone radical, to a process for their preparation and to their use.
摘要:
Novel optically active Δ1-pyrrolines of the formula (I) in which R1, R2, R3, R4, and m are each as defined in the description, a plurality of the processes for preparing these substances and their use for controlling pests.
摘要:
The present invention relates to an improved process for preparing ring-fluorinated aromatics of the general formula (I) by a halogen exchange reaction (halex reaction) of a plurality of halogen substituents in one stage in the presence of a catalyst.
摘要:
This invention relates to 1,2-di(4-hydroxyaryl)tetrafluoroethanes of the general formula (I) wherein R are each, independently of one another, hydrogen, F, Cl, Br, I, CN, COOR2, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-perfluoroalkyl, C1-C4-perfluoroalkoxy, C1-C4-perfluoroalkylthio, C1-C4-polyfluoroalkyl, C1-C4-polyfluoroalkoxy, or C1-C4-polyfluoroalkylthio, R2 is C1-C4-alkyl, and n is an integer from 0 to 4. This invention further relates to the preparation of such compounds as well as to precursors and intermediates that can be used in their preparation.
摘要:
This invention relates to 1,2-di(4-hydroxyaryl)tetrafluoroethanes of the general formula (I) wherein R are each, independently of one another, hydrogen, F, Cl, Br, I, CN, COOR2, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-perfluoroalkyl, C1-C4-perfluoroalkoxy, C1-C4-perfluoroalkylthio, C1-C4-polyfluoroalkyl, C1-C4-polyfluoroalkoxy, or C1-C4-polyfluoroalkylthio, R2 is C1-C4-alkyl, and n is an integer from 0 to 4. This invention further relates to the preparation of such compounds as well as to precursors and intermediates that can be used in their preparation.
摘要:
The present invention relates to 3-cyano-2,4,5-trifluorobenzoyl fluoride and to intermediates for its preparation and to the process for the preparation of 3-cyano-2,4,5-trifluoro-benzoyl fluoride, which starts from 5-fluoro-1,3-xylene (VIII); which is bichlorinated in the ring in the presence of a catalyst under ionic conditions to give 2,4-dichloro-5-fluoro-1,3-dimethylbenzene (VII). The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene (VI). The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid (V), which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid (IV), the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid (III), from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride (II). Finally, the nitrile is subjected to fluorine/chlorine exchange.
摘要:
The present invention relates to a process for preparing perfluoroalkylanilines and to their use for preparing active ingredients, in particular for agrochemicals.
摘要:
The present invention relates to an improved process for preparing ring-fluorinated aromatics of the general formula (I) by a halogen exchange reaction (halex reaction) of a plurality of halogen substituents in one stage in the presence of a catalyst.
摘要:
The present invention relates to the preparation of nuclear-fluorinated aromatics by reacting, with a fluoride at 40 to 260° C., an aromatic compound substituted at the nucleus with halogen that is exchangeable for fluorine in the presence of at least one compound of the formula (I) where A, B, and An⊖ have the meanings specified in the disclosure.