Synthesis of N-(thio)phosphoryl-N '-2 benzoxazolyl semicarbazides

We prepared the benzoxazole derivatives bearing the (thio) phospholyl moiet y by addition reactions if 2-hydrazionbenzoxazole with isothiocyanato (thio ) phosphates and characterized their structures by elementary analysis and H-1 NMR and IR spectral data. From the results of biological activity scree ning, we found that these compounds possess some herbicidal and plant growt h regulator activities, and especially good fungicidal activity against Puc cinia recondita. (C) 2001 John Wiley & Sons, Inc.