Synthesis, Herbicidal Activity, and QSAR of Novel <i>N</i>-Benzothiazolyl- pyrimidine-2,4-diones as Protoporphyrinogen Oxidase Inhibitors
作者:Yang Zuo、Qiongyou Wu、Sun-wen Su、Cong-wei Niu、Zhen Xi、Guang-Fu Yang
DOI:10.1021/acs.jafc.5b05378
日期:2016.1.27
μM) displayed the most promising postemergence herbicidal activity with a broad spectrum even at a concentration as low as 37.5 g of active ingredient (ai)/ha. Maize exhibits relative tolerance against compound 9F-6 at the dosage of 150 g ai/ha, but it is susceptible to saflufenacil even at 75 g ai/ha. Thus, compound 9F-6 exhibits the potential to be a new herbicide for weed control in maize fields
原卟啉原氧化酶(PPO,EC 1.3.3.4)是几种结构多样的除草剂的主要作用靶标。作为我们在开发新的抑制PPO的除草剂方面的研究工作的延续,一系列新型的3-(2'-卤代5'-取代-苯并噻唑-1'-基)-1-甲基-6-(三氟甲基) )设计并合成了嘧啶-2,4-二酮9。生物测定结果表明,许多新合成的化合物对烟草PPO(mtPPO)的抑制活性均高于对照,苯氟磺草胺和次磺隆。化合物9F-5被确定为最有效的抑制剂,对mtPPO的Ki值为0.0072μM,分别显示出比次磺隆(Ki = 0.03μM)和沙氟芬那西(Ki = 0.01μM)高约4.2倍和1.4倍的效力。另外的温室分析表明,化合物9F-6(Ki = 0.012μM)甚至在低至37.5 g活性成分(ai)/ ha的浓度下,仍显示出最有希望的出苗后除草活性,具有广谱性。玉米在150 g ai / ha的剂量下表现出对化合物9F-6的相对耐受性,但是即使在75