Synthesis and Herbicidal Activity of Novel 4-Acyl-2,5-disubstituted-3-hydroxypyrazoles and 4-Arylcarbonyl-3-substitutedisoxazol-5-ones
作者:Hong Song、Wei-Bing Feng、Feng Cheng、De-Qing Shi
DOI:10.1002/jhet.1659
日期:2013.11
various acyl chlorides, followed by the Fries rearrangement in the presence of calcium hydroxide and calcium oxide as the catalyst. Their structures were confirmed by IR, 1H NMR, mass spectroscopy, and elemental analyses. 1H NMR indicated that compounds 3 existed in enol forms and compounds 7 in keto configurations. The results of preliminary bioassays showed that some of the title compounds 3 and 7 exhibited
两套新颖的4-酰基-2,5-二取代-3-羟基吡唑3a,3b,3c,3d,3e,3f,3g,3h和4-芳基羰基3取代的异恶唑5酮7a,7b,7c,7d,7e,7f,7g,7h,7i由2,5-二取代-2,4-二氢-吡唑-1-或3-取代-4 H-异恶唑-5-的Scotton-Baumann反应合成一个6和各种酰氯,然后在氢氧化钙和氧化钙作为催化剂的情况下进行弗里斯重排。通过IR,1 H NMR,质谱和元素分析确认了它们的结构。1 H NMR表明化合物3以烯醇形式存在且化合物7以酮构型存在。初步生物测定的结果表明,在100 mg / L的浓度下,某些标题化合物3和7对甘蓝型油菜表现出中度至良好的除草活性。异恶唑化合物7对野菜双歧杆菌表现出更好的除草活性L.比吡唑化合物3的浓度为100 mg / L。此外,大多数的异恶唑化合物对显示较高的除草活性油菜L.比稗。但是,这些化合物在10 mg / L的浓度下除草活性较弱。