599444 Disclosed herein is a compound of formula (I) wherein the variables are defined in the specification the use thereof in the treatment of a microbial infection and a process for the preparation thereof comprising: reacting an &alpha,&bgr unsaturated acid with an amine, or reacting an acid halid with an amine, or reacting an acrylamide with an alkyl halide. Exemplary compounds include: 6-[(1E)-3-azetidin-1-yl-3-oxoprop-1-en-1-yl]-3,4-dihydro-1,8-naphthyridin-2(1H)-one 6-[(1E)-3-{ [4-(4-fluorophenoxy)methyl]piperidin-1-yl} -3-oxoprop-1-en-1-yl]-3,4-dihydro-1,8-naphthyridin-2(1H)-one 6-{ (1E)-3-oxo-3-[3-(pyridin-3-yloxy)pyrrolidin-1-yl]prop-1-en-1-yl} -3,4-dihydro-1,8-naphthyridin-2(1H)-one and (E)-6-(3-(3-(furan-2-ylmethoxy)azetidin-1-yl)-3-oxoprop-1-enyl)-3,4-dihydro-1,8-naphthyridin-2(1H)-one.
