Abstract:
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.
Abstract:
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.