Bayer Aktiengesellschaft

Gerhard Buttner

Erich Klauke

Manfred Lenthe

Udo Allenbach

Gerhard Wolfrum

Karl-Friedrich Christmann

Ingeborg Hammann

Klaus Sasse

Richard Sommer

Paul-Ernst Frohberger

Helmut Kaspers

Fritz Doring

Herbert Schwarz

Werner Kuhnel

Artur Judat

A process for the isolation of a dihydroxybenzenemonoether from a reaction mixture containing solvent, ether and unreacted dihydroxybenzene, comprising contacting the reaction mixture with at least one hydrocarbon which is not miscible or only partially miscible with the reaction mixture, the ether selectively entering the hydrocarbon. Advantageously the reaction for the preparation of the monoether is carried out in an alcohol, a ketone, a dipolar aprotic solvent or a polyhydroxyalkyl ether, or a mixture thereof with water, the hydrocarbon used as extracting agent has a boiling point between about 80.degree. and 300.degree. C., and the extraction is carried out in the presence of water whereby there is an increase in the selectivity of the extraction.

Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran

A process for the isolation of a dihydroxybenzene-monoether from a reaction mixture containing solvent, ether and unreacted dihydroxybenzene, comprising contacting the reaction mixture with at least one hydrocarbon which is not miscible or only partially miscible with the reaction mixture, the ether selectively entering the hydrocarbon. Advantageously the reaction for the preparation of the monoether is carried out in an alcohol, a ketone, a dipolar aprotic solvent or a polyhydroxyalkyl ether, or a mixture thereof with water, the hydrocarbon used as extracting agent has a boiling point between about 80.degree. and 300.degree. C., and the extraction is carried out in the presence of water whereby there is an increase in the selectivity of the extraction.

Isolation of dihydroxybenzene-monoethers from reaction mixtures

A process for the preparation of a monoalkyl ether of a hydroxyphenol of the formula ##STR1## in which Z each independently is hydrogen or a substituent which is stable under the reaction conditions,

Preparation of monoalkyl ethers of hydroxyphenols

In the preparation of a 7-hydroxycoumaran of the formula ##STR1## in which Z is a hydrogen atom or a substituent which is inert under the subsequent reaction conditions,

Preparation of certain 2-methyl-2,3-dihydro-benzofuran-7-ols

Monoazo dyestuffs of the formula ##STR1## wherein R.sub.1 represents an aromatic radical, an aliphatic radical with 1-4 C atoms or a dialkylamino radical, in which the alkyl groups contain 1-C atoms, R.sub.2 represents hydrogen, halogen, alkyl with 1-C atoms, alkoxy with 1-4 C atoms or trifluoromethyl, R.sub.3 represents hydrogen, halogen, alkyl with 1-4 C atoms, alkoxy with 1-4 C atoms or trifluoromethyl and K represents the radical of a coupling component K-H of the formulae (II), (III) and (IV) ##STR2## wherein R.sub.4 represents alkyl with 1-4 C atoms or aryl,

Monoazo dyestuffs containing diazo component substituted by disulfimide

Monoazo dyestuffs of the formula ##STR1## wherein K represents the radical of a couping component K-H of the formula ##STR2## said dyestuff being suitable for the dyeing of synthetic fibre materials especially those from polyamides.

Phenylazopyrazolo dyestuffs including disulfimide substituent

A process for the preparation of a trichloromethyl-trifluoromethyl-benzene of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and represent hydrogen, fluorine or chlorine, By contacting at least one molecule of the formula ##STR2## wherein R.sup.1 and R.sup.2 are as previously identified, m and n are independently 0 to 3 With another molecule of the formula ##STR3## wherein M AND N ARE INDEPENDENTLY 0 TO 3 In the presence of a halogen transfer catalyst, optionally in the presence of a promoter.

Method for preparing trichloromethyl-trifluoromethyl-benzenes

A process for preparing a xylene which is fluorinated and chlorinated in the side chain, having the formula ##STR1## wherein X represents hydrogen or fluorine and

Preparation of trichloromethyl-trifluoro methyl-benzenes

The invention relates to the transfer printing hydrophobic fibre materials using paper supports which are printed with azo dyestuffs of the formula ##STR1## wherein X.sub.1 and X.sub.2 represent hydrogen or alkyl or cycloalkyl radicals and

Transfer printing process

Bis-halogen carbonyl anilines useful in the production of herbicides having the formula ##SPC1## Wherein

Bis-halogen carbonyl anilines and process for the production

2-Trifluoromethylimino-benzo-heterocyclic compounds of the general formula ##SPC1## In which

2-Trifluoromethylimino-benzo-heterocyclic compounds

2-Trifluoromethylimino-1,3-dithiolo[4,5-b]-quinoxalines of the formula ##SPC1## In which X is lower alkyl, lower alkoxy, trihalogeno-methyl, trihalogenomethoxy, halogen or nitro, and n is an integer from 0 to 4, Which possess insecticidal, acaricidal, fungicidal and nematocidal properties.

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Cologne, Germany

Gerhard Buttner