名称:
Synthesis and Fungicidal Activity of(1Z, 3Z)-4,4-Dimethyl-1-substitutedphenyl-2-(1H-1,2,4-triazol-1-yl)-pent-1-en-3-oneO-[2,4-dimethylthiazole(or 4-methyl-1,2,3-thiadiazole)]-5-carbonyl Oximes
摘要:
A series of novel (Z)‐1‐tert‐butyl (or phenyl)‐2‐(1H‐1,2,4‐triazol‐1‐yl)‐ethanoneO‐[2,4‐dimethylthiazole (or 4‐methyl‐1,2,3‐thiadiazole) −5‐carbonyl] oximes5a–5cand (1Z, 3Z)‐4,4‐dimethyl‐1‐substitutedphenyl‐2‐(1H‐1,2,4‐triazol‐1‐yl)‐pent‐1‐en‐3‐oneO‐[2,4‐dimethylthiazole (or 4‐methyl‐1,2,3‐thiadiazole)‐5‐carbonyl] oximes6a–6ewere synthesized by the condensations of (Z)‐1‐tert‐butyl (or phenyl)‐2‐(1H‐1,2,4‐triazol‐1‐yl)‐ethanone oximes3or (1Z, 3Z)‐4,4‐dimethyl‐1‐substitutedphenyl‐2‐(1H‐1,2,4‐triazol‐1‐yl)‐pent‐1‐en‐3‐one oximes4with 2,4‐dimethylthiazole‐5‐carbonyl chloride or 4‐methyl‐1,2,3‐thiadiazole‐5‐carbonyl chloride in the basic condition. Their structures were confirmed by IR,1H NMR, mass spectroscopy, and elemental analyses. The results of preliminary bioassays showed the title compounds5and6exhibited moderate to good fungicidal activities. For example, compound6cpossessed 86.4% inhibition againstFusarium oxysporum, and compound6bexhibited 86.4 and 100% inhibition againstFusarium oxysporumandCercospora arachidicola Horiat the concentration of 50 mg/L, respectively.