Meta-bromination with suppression of para-bromination is achieved by forming a reaction mixture comprised of (i) bromine chloride, (ii) a bromination catalyst, and (iii) a benzoyl halide, and maintaining the temperature of the resultant reaction mixture at one or more temperatures above 0.degree. C., but not greater than 30.degree. C. The bromine chloride is preferably formed in situ, most preferably by sparging gaseous chlorine into a mixture of bromine, finely-divided iron, and benzoyl chlorid...

The present invention relates to novel arylphenyl-substituted cyclic ketoenols of the formula (I) ##STR00001## in which X represents halogen, alkyl, alkoxy, alkenyloxy, alkylthio, alkylsulphinyl, alkylsulphonyl, halogenoalkyl, halogenoalkoxy, halogenoalkenyloxy, nitro, cyano or in each case optionally substituted phenyl, phenoxy, phenylthio, phenylalkoxy or phenylalkylthio, Y represents in each case optionally substituted cycloalkyl, aryl or hetaryl, Z represents hydrogen, halogen, alkyl, alkoxy...

The preparation and use as an intermediate for making insecticides has been disclosed for a compound of the formula: ##STR1## in which X and Y are each chlorine or bromine.

Process for preparing CHF.sub.2 OCHFCF.sub.3 through the use of novel intermediate compounds CHCl.sub.2 OCH.sub.2 COCl and CHCl.sub.2 OCHClCOCl.

Novel trisubstituted benzoic acid intermediates which are useful in the preparation of certain herbicidal 2-(2,3,4-trisubstituted benzoyl)-1,3-cyclohexanediones are described.

The present invention relates to a novel process for preparing 2,4,5-trimethylphenyl-acetic acid by reacting pseudocumene with dichloroacetyl chloride in a Friedel-Crafts reaction to give 2,2-dichloro-1-(2,4,5-trimethylphenyl)ethanone, converting the 2,2-dichloro-1-(2,4,5-trimethylphenyl)ethanone to 2,4,5-trimethylmandelic acid using an alkali metal hydroxide and reducing the 2,4,5-trimethylmandelic acid to 2,4,5-tri-methylphenylacetic acid.

A direct, essentially one-step method of preparing nuclearly chlorinated naphthalene esters which comprises forming a reaction mixture consisting essentially of a mono- or dicarboalkoxy substituted naphthalene, a chlorinated organic solvent having from 1 to 4 carbon atoms and a chlorination catalyst, heating the reaction mixture, and passing molecular chlorine into the mixture. The extent of the chlorination of the naphthalene mono- or diester can be controlled by varying the solvent employed, t...

2,2-Dichloroacetoacetyl chloride having the formula: ##STR1## Process for producing 2,2-dichloroacetoacetyl chloride wherein acetyl chloride is reacted by means of a Lewis acid as a catalyst with chlorine at a temperature of 30.degree. to 60.degree. C. The mole ratio of acetyl chloride to the catalyst is from 1:0.005 to 1:0.5 and the mole ratio of acetyl chloride to the chlorine is from 1:0.1 to 1:1.5. The most preferred catalysts are aluminum chloride and aluminum bromide.

Polyhalogenated benzotrifluorides can be reacted with chlorides from the series of Friedel-Crafts catalysts to give the corresponding benzotrichlorides, which can be hydrolysed by water in the presence of iron(III) chloride to give the corresponding benzoyl chlorides. These are suitable as intermediate products for the preparation of active compounds for medicaments and feed additives.

Certain fluoroalkanoic acids and derivatives, including 2-fluoroisobutyric acid and 2-fluoroisobutyryl chloride, useful as intermediates for fungicides, and methods of preparing them.