pyrimidinamine derivatives containing a biphenyl ether moiety were designed and synthesized. Their structures were confirmed by 1H NMR, MS, and elemental analyses. Their insecticidal activities against lepidopteran and hemiptera insects and acaricidalactivities were tested. The results of bioassay demonstrated that 9k showed the best activity (LC50 = 2.08 mg/L) against Tetranychus urticae, which is comparable
Design, synthesis and antifungal activity of new substituted difluoromethylpyrimidinamine derivatives
作者:Aiying Guan、Mingan Wang、Wei Chen、Fan Yang、Jinlong Yang、Yu Zhao、Zhinian Li、Changling Liu
DOI:10.1016/j.jfluchem.2017.08.008
日期:2017.9
target sites have already developed serious resistance to the main existing classifications of fungicides. In order to discover novel fungicides with a promising activity on rusts, twenty new substituted difluoromethylpyrimidinamine derivatives were designed and synthesized with the aid of the intermediate derivatization methods starting from ethyl 4,4-difluoro-3-oxobutanoate that is the common raw material
锈是最重要的真菌疾病之一,已知的目标部位已经对主要的现有杀真菌剂类别产生了严重的抗性。为了发现对锈病具有广阔前景的新型杀真菌剂,从中间体4,4-二氟-3-氧代丁酸乙酯开始,通过中间衍生化方法,设计并合成了二十种新的取代的二氟甲基嘧啶胺衍生物。新推出的重要琥珀酸脱氢酶抑制剂(SDHI)杀真菌剂。它们的结构通过1 H NMR,13 C NMR,19 F NMR,IR,元素分析和HRMS鉴定。对所有化合物进行了体内筛选对南部玉米锈病(SCR)的杀菌活性。初步的生物测定结果表明5-氯-6-(二氟甲基)-N-(2-(6-(3-(三氟甲基)苯氧基)吡啶-3-基)乙基)嘧啶-4-胺(化合物 J,R 1 = CHF 2,Alk = CH 2 CH 2,Rn = 3-CF 3)是具有所需的针对SCR的杀真菌活性的最佳结构(EC 50 = 2.16 mg / L),远高于商品杀菌剂双氟甲草胺(EC 50 =
Process for the production of 4,5-dichloro-6-ethylpyrimidine
申请人:Lonza Ltd.
公开号:US04977264A1
公开(公告)日:1990-12-11
2-chloro-3-oxopentanoic acid alkyl ester is condensed with the addition of bases with formamidinium salts into 5-chloro-6-ethyl-4-hydroxypyrimidine. The latter is converted with phosphoryl chloride into 4,5-dichloro-6-ethylpyrimidine.