Facile synthesis and biological activities of novel fluorine-containing pyrido[4,3-d]pyrimidines
作者:Wenyan Mo、Guihong Liao、Tao Wang、Hongwu He
DOI:10.1016/j.jfluchem.2008.03.011
日期:2008.6
analysis. The preliminary bioassay indicated that some compounds possess significant herbicidal activity against the roots of rape and barnyard grass, especially when the fluorine atom was introduced to the para position of the substitutents on pyrimidine ring; some compounds showed fungicidal activities against Rhizoctonia solani, Botrytis cinereapers, Gibberella zeae, Dothiorella gregaria, Colletotrichum
设计并合成了十四种新颖的3-取代的5-甲基-4-亚甲基-7-烷基硫基-3,4-二氢-吡啶并[4,3 - d ]嘧啶-8-腈,化合物4a – n,并通过一种简便的方法进行了合成区域选择性环化过程。中间体2在乙酸酐存在下与原甲酸三乙酯(摩尔比为1:4)反应,生成甲酰胺酯3,在温和条件下加入不同的胺后,将其选择性地循环至4。化合物4a – n的结构通过IR [ 1]确证。1 H NMR,MS和元素分析。初步的生物测定表明,某些化合物对油菜和bar草的根部具有显着的除草活性,尤其是在将氟原子引入嘧啶环上取代基的对位时;尤其是当这些化合物具有除草活性时。一些化合物显示出对杀真菌活性水稻纹枯病菌,葡萄孢属cinereapers,玉蜀黍赤霉,Dothiorella蝗,炭疽病棉蚜为好,并引入氟的对抗真菌活性的负面影响。