摘要 |
Compounds having the general formula (I): …<CHEM>… and stereoisomers thereof, wherein A is the group =CW- or a nitrogen atom, B is the group =CX- or a nitrogen atom, D is the group =CY- or a nitrogen atom, and E is the group =CZ- or a nitrogen atom, wherein W, X, Y and Z, which may be the same or different, are hydrogen or halogen atoms, or nitro, nitrile, the group …<CHEM>… or any of the following, optionally substituted groups, namely alkyl, cycloalkyl, cyclalkylalkyl, alkenyl, alkynyl, aryl, aralkyl, arylazo, alkoxy, heterocyclyloxy, aryloxy, amino, acylamino, or the groups CO2R<3>, CONR<4>R<5>, COR<6> or S(O)nR<7> (where n = 0, 1 or 2) or CR<8> = NR<9>; and wherein R<1>, R<2>, R<3>, R<4>, R<5>, R<6>, R<7> and R<8>, which may be the same or different, are hydrogen ( but R<1> and R<2> are not hydrogen) atoms or alkyl, cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted aralkyl, cycloalkyl groups or optionally substituted heteroaromatic, whilst R<9> may be alkyl, cycloalkyl, optionally substituted aryl, optionally substituted aralkyl or cycloalkylalkyl; V can be either oxygen or sulphur. |