| 摘要 |
The invention relates to a process for the preparation of 2-arylimidazopyridines of the general formula I <IMAGE> in which -A=B- represents (a)-Ch=N- or (b)-N=CH-, Ar represents a phenyl radical which, in case (a), is substituted by one or two alkynyloxy, cyanomethoxy, carboxymethoxy and/or alkyloxycarbonylmethoxy groups and can be substituted by one or two additional hydroxyl, alkoxy, alkenyloxy and/or alkynyloxy groups, or which, in case (b), is substituted by one to three hydroxyl, mercapto and/or -Z-R groups, Z represents -O-, -S- or -SO- and R represents alkyl, alkenyl, alkinyl, hydroxyalkyl, cyanomethyl or alkoxycarbonylmethyl, where the alkyl, alkenyl, alkinyl and hydroxyalkyl groups in each case have up to 5 C atoms but where, in case (b), the phenyl radical is only substituted by hydroxyl or methoxy groups when it has simultaneously at least one more substituent which differs in each case from those mentioned above, and of their salts, characterised in that the group Q is eliminated from a compound of the general formula II <IMAGE> in which E represents -NQ-CAr=N- or -N=CAr-NQ- and Q represents an amino protective group and A, B and Ar have the meanings mentioned in the case of formula I, by methods known per se and in that, if appropriate, a resulting compound is converted into one of its salts by treatment with an acid or a base.
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