ANTIBACTERIAL HYDROXAMIC ACID DERIVATIVES

摘要

Compounds of formula (I) are useful in the preparation of antibacterial compositions wherein R1 represents hydrogen, hydroxy, a mino, methyl, or trifluoromethyl; R2 represents a group R10-(X)n-(ALK)- wherein R10 represents hydrogen, a C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, cycloalkyl, aryl, or heterocyclyl group, any of which may be unsubstituted or substituted by (C1-C6)alkyl, (C1-C6)alkoxy, hydroxy, mercapto, (C1-C6)alkylthio, amino, halo (including fluoro, chloro, bromo and iodo), trifluoromethyl, cyano, nitro, -COOH, -CONH2, -COOR<A>, -NHCOR<A>, -CONHR<A>, -NHR<A>, -NR<A>R<B>, or -CONR<A>R<B> wherein R<A> and R<B> are independently a (C1-C6)alkyl group and ALK represents a straight or branched divalent C1-C6 alkylene, C2-C6 alkenylene, C2-C6 alkynylene radical, and may be interrupted by one or more non-adjacent -NH-, -O- or -S- linkages, X represents -NH-, -O- or -S-, and n is 0 or 1; R represents hydrogen or C1-C6 alkyl; R3 represents the characterising group of a natural or non-natural alpha amino acid in which any functional groups may be protected; and R4 represents an ester or thioester group.