bioassay demonstrated that some title compounds such as 6-(3-chlorophenylthio)-1-phenyl-3-methylthio-5-(4-chlorophenyl)-1H-pyrazolo[3,4-d]-pyrimidin-4(5H)-one and 6-(4-fluorophenylthio)-1-phenyl-3-methylthio-5-(3-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one showed good inhibition activities against the root of Brassica napus (rape) and Echinochloa crusgalli (barnyard grass) at a dosage of 100 mg/L.
图形摘要 摘要 通过串联 aza-Wittig 和相应亚
氨基正膦、芳基
异氰酸酯和取代
苯硫酚的环化反应,可以方便地合成一系列 pyrazolo[3,4-d]pyrimidine-4-one 衍
生物。目标化合物的结构经IR、1H NMR、13C NMR、LC-MS和元素分析确证。初步
生物测定表明,一些标题化合物如 6-(3-chlorophenylthio)-1-phenyl-3-methylthio-5-(4-chlorophenyl)-1H-pyrazolo[3,4-d]-pyrimidin-4(5H )-one 和 6-(4-fluorophenylthio)-1-phenyl-3-methylthio-5-(3-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one 显示出良好的抑制活性以 100 毫克/升的剂量对抗欧洲油菜(油菜)和稗子(稗草)的根。