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N,N’-diphenylurea reacted with phosphorus trichloride and phenyl dicklorophospbane giving theheterocyclic compounds 1 and 2 with a direct phosphorus-phosphorus bond (P-P bond ), respectively. The newcompounds were characterized by elementary analysis, NMR and IR spectra. The results or preliminary bioassay showed that these heterocycles possess selective herbicidal activity at 1.5 kg/hm2.