This invention concerns intermediates in the preparation of compounds of formula the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; —A— is a bivalent radical of formula; R1 and R2 each independently are hydrogen, hydroxy, halo, cyano, C1-6alkyl, trihalomethyl, trihalomethoxy, C2-6alkenyl, C1-6alkyloxy, hydroxyC1-6alkyloxy, C1-6alkyloxyC1-6alkyloxy, C1-6alkyloxycarbonyl, aminoC1-6alkyloxy, mono- or di(C1-6alkyl)aminoC1-6alkyloxy, Ar, Ar—C1-6alkyl, Ar-oxy, Ar—C1-6alkyloxy; or when on adjacent positions R1 and R2 taken together may form a bivalent radical; R3 and R4 each independently are hydrogen, halo, cyano, C1-6alkyl, C1-6alkyloxy, Ar-oxy, C1-6alkylthio, di(C1-6alkyl)amino, trihalomethyl, trihalomethoxy, or when on adjacent positions R3 and R4 taken together may form a bivalent radical; R5 is an imidazolyl substituted with hydrogen or C1-6alkyl; R6 hydrogen, hydroxy, halo, cyano, optionally substituted C1-6alkyl, C1-6alkyloxycarbonyl or Ar; or a radical of formula —O—R7, —S—R8, —N—R8R9; and Ar is optionally substituted phenyl; and of the preparation, thereof.