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《Chinese Journal of Pesticide Science》 2010-04
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Design,synthesis and fungicidal activity of coumoxystrobin(SYP-3375)

LI Miao, LIU Chang-ling, ZHANG Ming-xing, GUAN Ai-ying, ZHANG Hong, SI Nai-guo (State Key Laboratory of the Discovery and Development of Novel Pesticide, Shenyang Research Institute of Chemical Industry Co.,Ltd.,Shenyang 110021,China)  
The discovery,synthesis,fungicidal activity,toxicological properties of(E)-methyl 2-[2-(3-n-butyl-4-methyl-2-oxo-chromen-7-yloxy) methyl phenyl]-3-methoxyacrylate(coumoxystrobin,SYP-3375) were introduced.Coumoxystrobin was synthesized from ethyl acetoacetate as starting material via several steps including alkylation,cyclization and condensation.The structures of coumoxystrobin and the intermediates were identified by nuclear magnetic resonance(1H NMR),IR and elemental analysis.The bioactivity results showed that in greenhouse conditions coumoxystrobin had lower activity in controlling cucumber downy mildew and powdery mildew than contrasts,in field trials,the fungicidal activity against cucumber downy mildew of coumoxystrobin at 100 g(a.i)/ha was almost equivalent to that of enestroburin and azoxystrobin,the fungicidal activity against cucumber powdery mildew at 50 and 200 g (a.i)/ha was lower or equivalent to that of enestroburin EC.
【Fund】: “十一五”国家科技支撑计划项目(2006BAE01A03-2);; 国家重点基础研究发展计划(973计划)项目(2003CB114400 2010CB126105)
【CateGory Index】: TQ450.2
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