吡唑并嘧啶-4-酮衍生物的合成与除草活性

吡唑并嘧啶-4-酮衍生物的合成与除草活性;吡唑[3; 4-d]并嘧啶酮;苯氧丙酸酯;aza-Wittig反应;合成;除草活性

Synthesis and Herbicidal Activities of Pyrazolo[3,4-d]pyrimidin-4-one Derivatives

Phenyl-3-methylthio(methanesulfonyl)-5-substituted aryl 6-(4-(2-alkoxy carbonyl) ethoxy)phenoxypyrazolopyrimidin-4-one derivatives( 6 and 7) were synthesized by a tandem aza-Wittig and annulation reaction of iminophosphorance 4 with aromatic isocyanate and substituted phenol s. The structures of all the target compounds have been confirmed. The preli minary bioassay tests indicate that compounds 6h, 7a, 7c possess h igh herbicidal activities against the roots of rape and barnyard grass. Their inhibitory rates against the roots of rape and barnyard grass are more than 90 %.