Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.

Трифлуорометюыл-zamenennye biphenylcarboxylic кислоты подготовлены путем преобразовывать метилов-zamenennye biphenylcarbonitriles в соответствуя тричюлорометюыл-zamenennye biphenylcarbonitriles, преобразовывать группу trichloromethyl thereof к группе trifluoromethyl и таким образом получать трифлуорометюыл-zamenennye biphenylcarbonitriles, и подготовлять соответствуя карбоновые кислоты therefrom гидролизом. Несколькими промежуточными звенами возникая во время этого будут смеси романа.

 
Web www.patentalert.com

< Process for the preparation of 2,3,4,5-tetrafluorobenzene derivatives

< Method for the catalytic gas-phase oxidation of propene to acrylic acid

> Plastic articles comprising biodegradable PHA copolymers

> Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6)

~ 00076