| http://www.w3.org/ns/prov#value | - If ??-halogenocarboxylic acids of the general formula ##STR35## in which Hal represents a chlorine, bromine or iodine atom and R22 denotes hydrogen, alkyl with 1 to 5 C atoms or aryl, in particular phenyl, are used, the halogen can subsequently be replaced, be reaction with a nucleophilic radical defined under Y, such as, for example, a nitrogen nucleophile or oxygen nucleophile, by the nucleophil
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