A series of 1,3,4-oxadiazole or 1,3,4-thiadiazole-substituted pyrazole derivatives were synthesized from 4-pyrazole formhydrazide; their biological activities were studied. The structures of all the new compounds were...A series of 1,3,4-oxadiazole or 1,3,4-thiadiazole-substituted pyrazole derivatives were synthesized from 4-pyrazole formhydrazide; their biological activities were studied. The structures of all the new compounds were confirmed by means of spectroscopic methods and microanalyses. The preliminary bioassay results indicate that some compounds of them have a good fungicidal activity against Phoma asparagi and Physalospora piricola Nose.展开更多
Many pyrazole derivatives have good bioactivity.In this paper, five new pyrazolylacyloxylalkylphosphonate derivatives have been synthesized by condensation of 4chloro1,3bismethylpyrazole5carboxlic acid...Many pyrazole derivatives have good bioactivity.In this paper, five new pyrazolylacyloxylalkylphosphonate derivatives have been synthesized by condensation of 4chloro1,3bismethylpyrazole5carboxlic acid with relative αhydroxyalkylphosphonates. All compounds synthesized are confirmed by 1H NMR,IR and MS.The synthesis of key intermediate pyrazole carboxlic acid has been studied.展开更多
基金Supported by the National Natural Science Foundation of China(No.2 0 2 0 2 0 0 3) and the state's"86 3"Project(No.2 0 0 1AA2 35 0 11)
文摘A series of 1,3,4-oxadiazole or 1,3,4-thiadiazole-substituted pyrazole derivatives were synthesized from 4-pyrazole formhydrazide; their biological activities were studied. The structures of all the new compounds were confirmed by means of spectroscopic methods and microanalyses. The preliminary bioassay results indicate that some compounds of them have a good fungicidal activity against Phoma asparagi and Physalospora piricola Nose.
文摘Many pyrazole derivatives have good bioactivity.In this paper, five new pyrazolylacyloxylalkylphosphonate derivatives have been synthesized by condensation of 4chloro1,3bismethylpyrazole5carboxlic acid with relative αhydroxyalkylphosphonates. All compounds synthesized are confirmed by 1H NMR,IR and MS.The synthesis of key intermediate pyrazole carboxlic acid has been studied.
