The [4+2] and [2+1] cycloaddition reaction of vinylacetylene derivatives with cyclopentadiene (hexachlorocyclopentadiene) and dichlorocarbene was used to prepare the corresponding cyclic derivatives that contain a triple bond and a functional group in the side chain and exhibit bactericidal activity against sulfate-reducing bacteria. It has been found that bacterial growth is suppressed at a reagent concentration of 50-200 mg/l. The introduction of electron-withdrawing chlorine atoms into the cycle is shown to reduce the bactericidal activity of bicyclic ethers and alcohols.