Synthesis and Herbicidal Activity of 2-(7-Fluoro-3-oxo- 3,4-dihydro-2<i>H</i>-benzo[<i>b</i>][1,4]oxazin-6-yl)isoindoline-1,3-diones
作者:Ming-zhi Huang、Ke-long Huang、Ye-guo Ren、Man-xiang Lei、Lu Huang、Zhong-ke Hou、Ai-ping Liu、Xiao-ming Ou
DOI:10.1021/jf051494s
日期:2005.10.1
The mode of action of 2-(7-fluoro-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-4,5,6,7-tetrahydro-2H- isoindoline-1,3-diones, including the commercial herbicide flumioxazin, had been identified as inhibition of protoporphyrinogen oxidase (protox). As part of continuous efforts to search for new herbicides with high efficacy, broad-spectrum activity, and safety to crops, flumioxazin and its iodo analogue
2-(7-氟-3-氧代-3,4-二氢-2H-苯并[b] [1,4]恶嗪-6-基)-4,5,6,7-四氢-的作用方式包括市售除草剂氟米沙星在内的2H-异吲哚啉-1,3-二酮已被鉴定为对原卟啉原氧化酶(protox)的抑制作用。为了不断寻求新的高效,广谱活性和对农作物安全的除草剂,氟米沙星及其碘类似物(B2055)被用作进一步优化的先导化合物。通过从5-氟-2-硝基苯酚开始的多步合成程序制备了一系列新型化合物。通过1 H NMR,IR,质谱和元素分析在结构上确认所有测试化合物。初步的生物测定数据表明,其中一些具有与其他抑制protox的除草剂相当的商业除草活性。最好的化合物之一,5-氟-2-(7-氟-3-氧代-4-(丙-2-炔基)-3,4-二氢-2H-苯并[b] [1,4]恶嗪- 6-基)异吲哚啉-1,3-二酮(8e)具有与B2055相当的绒毛(Abutilon theophrasti Medic)和马尾草(Digitaria