Hoechst Aktiengesellschaft

Clariant Finance (bvi) Limited

Norbert Beye

Matthias Krull

Helmut Ritter

Roman Morschhaeuser

Sarah Schmitz

Alexander Lerch

Karl-Ernst Mack

Hanspeter Gethoeffer

The invention relates to a method for producing bisbenzoxazoles that are interconnected by means of a system of conjugated double bonds, according to which o-aminophenols are reacted with dicarboxylic acids, the carboxyl groups of which are interconnected via a double bond or a system of conjugated double bonds, to form an ammonium salt, said ammonium salt being converted in the presence of dehydrogenating catalysts and solvents with a low dielectric loss into benzoxazol by means of microwave radiation.

Method for producing bisbenzoxazoles

N-(4-Bromo-2-fluorobenzyl)carbamates and a process for their preparation The invention relates to N-(4-bromo-2-fluorobenzyl)carbamates of the formula (I), ##STR1## where R is (C.sub.1 -C.sub.12)alkyl, benzyl or phenyl, where the benzyl and phenyl radicals can also be substituted by (C.sub.1 -C.sub.3)alkyl or (C.sub.1 -C.sub.3)alkoxy, and to a process for preparing these compounds.

N-(4-bromo-2-fluorobenzyl)carbamates and a process for their preparation

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Kelkheim, Germany

Norbert Beye