Synthesis and herbicidal activity of (Z)-ethoxyethyl 2-cyano-3-(2-methylthio-5-pyridylmethylamino)acrylates
作者:Qing Min Wang、Hui Kai Sun、Run Qiu Huang
DOI:10.1002/hc.10214
日期:——
all of the products were confirmed by 1H NMR, elemental analysis, IR, and mass spectroscopy. The herbicidal activities of the products were evaluated, and the results of bioassay showed that (Z)-ethoxyethyl 2-cyano-3-methyl-3-(2-methylthio-5-pyridylmethylamino)acrylate exhibits good herbicidal activity on rape (Brassica napus) at a dose of 1.5 kg/ha. © 2003 Wiley Periodicals, Inc. 15:67–70, 2004; Published
2-甲硫基-5-吡啶亚甲基胺由2-氯-5-甲基吡啶制备。乙氧基乙基 2-氰基-3,3-二甲基硫代丙烯酸酯由乙氧基乙基氰基乙酸酯、二硫化碳和硫酸二甲酯以 86.2% 的产率制备。其与2-甲硫基-5-吡啶亚甲基胺反应生成(Z)-乙氧基乙基2-氰基-3-甲硫基-3-(2-甲硫基-5-吡啶基甲氨基)丙烯酸酯。以2-氰基乙酸乙氧基乙酯和原乙酸三乙酯合成乙氧基乙基(Z+E)-2-氰基-3-乙氧基丙烯酸酯,产率90.7%,与2-甲硫基-5-吡啶亚甲基胺反应生成(Z)-乙氧基乙基2 -氰基-3-甲基-3-(2-甲硫基-5-吡啶-二甲基氨基)丙烯酸酯。所有产物的结构均通过 1H NMR、元素分析、IR 和质谱证实。评价产品的除草活性,生物测定结果表明(Z)-乙氧基乙基2-氰基-3-甲基-3-(2-甲硫基-5-吡啶基甲基氨基)丙烯酸酯在1.5 kg/ha的剂量下对油菜(Brassica napus)表现出良好的除草活性