摘要
为寻找结构新颖的嘧啶类杀菌剂,以2-氯嘧啶-4-甲酸、1-甲基-4-吡唑硼酸频哪醇酯、取代苯胺或取代苄胺等为原料,经Suzuki偶联和酰胺化反应合成了13种2-(1-甲基-1H-吡唑-4-基)嘧啶-4-甲酰胺类化合物,其结构经过1H NMR、13CNMR、IR、HRMS鉴定,并利用X射线单晶衍射法确定了N-苄基-2-(1-甲基-^(1)H-吡唑-4-基)嘧啶-4-甲酰胺(4h)的晶体结构.初步测试了目标化合物对3种植物病原菌的杀菌活性,在浓度为100 mg/L时, N-(4-甲基苯基)-2-(1-甲基-1H-吡唑-4-基)嘧啶-4-甲酰胺(4f)和N-(4-氯苄基)-2-(1-甲基-1H-吡唑-4-基)嘧啶-4-甲酰胺(4j)对水稻纹枯菌表现出较高的杀菌活性,抑制率分别为85.3%和79.1%.分子对接研究显示4f可与琥珀酸脱氢酶活性腔内的氨基酸残基形成2个氢键和1个阳离子-π相互作用.
In order to develop novel pyrimidine fungicides, thirteen 2-(1-methyl-1H-pyrazol-4-yl) pyrimidine-4-carboxamides were synthesized from 2-chloropyrimidine-4-carboxylic acid, 1-methyl-4-pyrazole borate pinacol ester, substituted anilines or substituted benzylamines as starting materials. The structures of target compounds were characterized by 1H NMR, 13C NMR, IR, HRMS, and the crystal structure of N-benzyl-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-4-carboxamide(4h) was also determined by X-ray diffraction method. The preliminary fungicidal activities against three plant fungi were evaluated, and the results showed that at a dosage of 100 mg/L, N-(4-methyl)phenyl-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-4-carboxamide(4f)and N-(4-chlorobenzyl)-2-(1-methyl-^(1)H-pyrazol-4-yl)pyrimidine-4-carboxamide(4j) possessed relatively high activities against Rhizoctonia solani with inhibitory rates of 85.3% and 79.1%, respectively. Molecular docking study showed that 4f can form two hydrogen bonds and one cation-π interaction with succinate dehydrogenase.
作者
孙昌兴
张福豪
张欢
李鹏辉
姜林
Sun Changxing;Zhang Fuhao;Zhang Huan;Li Penghui;Jiang Lin(College of Chemistry and Material Science,Shandong Agricultural University,Tai'an,Shandong 271018)
出处
《有机化学》
SCIE
CAS
CSCD
北大核心
2023年第1期229-235,共7页
Chinese Journal of Organic Chemistry
基金
山东省自然科学基金(No.ZR2020MB110)资助项目。
