| 摘要 |
Novel compounds having the formula I <IMAGE> (I) are described wherein X is a chlorine, bromine or iodine atom and Y is a residue having the formula R1R2R3C- wherein R1 and R2 are the same or different and each is a fluorine, chlorine or bromine atom and R3 is a hydrogen, fluorine, chlorine or bromine atom, a group -CR4R5R6, a cyano group, a group-COR7 or -PO(R8)2 wherein R4, R5, R6, independently, are F, Cl or Br, R7 nd R8 are the same or different and each is a chlorine atom or a group -OR9 wherein R9 is a C1-C4 straight chain or branched alkyl group with the proviso that when X is a chlorine atom, none of R1, R2, R3, R4, R5 and R6, can be a bromine atom. They can be obtained by reacting diketene with a compound XY in the presence of an agent capable of forming free radicals. Compounds (I) have biocidal activity against various organisms, e.g. bacteria, fungi and algae.
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