CN111285802A - 一种吡啶酰胺类化合物及用途 - Google Patents

一种吡啶酰胺类化合物及用途 Download PDF

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CN111285802A
CN111285802A CN201811495999.6A CN201811495999A CN111285802A CN 111285802 A CN111285802 A CN 111285802A CN 201811495999 A CN201811495999 A CN 201811495999A CN 111285802 A CN111285802 A CN 111285802A
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王刚
杨辉斌
兰杰
郝泽生
李志念
陈霖
李斌
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Shenyang Sinochem Agrochemicals R&D Co Ltd
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    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
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Abstract

本发明属于杀菌剂领域。涉及一种吡啶酰胺类化合物及其杀菌用途。吡啶酰胺类化合物如通式I所示:

Description

一种吡啶酰胺类化合物及用途
技术领域
本发明属于杀菌剂领域。涉及一种吡啶酰胺类化合物及其杀菌用途。
背景技术
由于杀菌剂在使用一段时间后,病害会对其产生抗性,因此,需要不断发明新型的和改进的具有杀菌活性的化合物和组合物。
吡啶酰胺化合物的杀菌活性已有报道。如WO2016131739公开了化合物KC1(专利中化合物86)及其杀菌活性。如EP0545099公开了化合物KC2(专利中化合物2.12,商品名:啶酰菌胺)及其杀菌活性。
Figure BDA0001896901460000011
现有技术中,结构如本发明通式I所示的吡啶酰胺类化合物未见报道。
发明内容
本发明的目的在于提供一种杀菌活性更好的吡啶酰胺类化合物,它可应用于农业上病害的防治。
为实现上述目的,本发明的技术方案如下:
吡啶酰胺类化合物如通式I所示,
Figure BDA0001896901460000012
式中:
R1选自氢、卤素、硝基、氰基、三氟甲基、苯基或C1-C12的烷基;
R2选自C1-C12的烷基;
所述通式I所示化合物还可为手性化合物,手性化合物构型选自R构型、S构型或RS混合构型。
本发明中优选的技术方案为,通式I中:
R1选自氢、卤素、硝基、三氟甲基、苯基或C1-C6的烷基;
R2选自C1-C8的烷基;
或,通式I所示的手性化合物,所述手性化合物构型选自R构型,S构型或RS混合物。
本发明中进一步优选的技术方案为,通式I中:
R1选自氢、氟、氯、溴、碘、硝基、三氟甲基、苯基、甲基、乙基、丙基或异丙基;
R2选自甲基、乙基、丙基、异丙基、丁基、2-丁基、戊基、2-戊基、己基或2-己基;
或,通式I所示的手性化合物,所述手性化合物构型选自R构型、S构型或RS混合物。
本发明中特别优选的技术方案为,通式I中:
R1选自氢、氟、氯、溴、硝基、甲基或三氟甲基;
R2选自2-戊基或2-己基;
或,通式I所示的手性化合物,所述手性化合物构型选自R构型、S构型或RS混合物。
上面给出的通式I化合物的定义中,汇集所用术语一般定义如下:
烷基是指直链或支链形式,例如甲基、乙基、正丙基、异丙基等。卤素是指氟、氯、溴、碘。
本发明的通式化合物I可由如下方法制备:
Figure BDA0001896901460000021
式中,L代表离去基团。
通式II化合物与通式III化合物(市售)在适宜的溶剂中、适宜的碱存在下,温度为-10℃到适宜溶剂的沸点下反应0.5-48小时制得化合物I。
适宜的溶剂选自二氯甲烷、氯仿、四氯化碳、己烷、苯、甲苯、乙酸乙酯、乙腈、四氢呋喃、二氧六环、N,N-二甲基甲酰胺或二甲基亚砜等。
适宜的碱包括碱金属如锂、钠或钾的氢化合物如氢化钠,碱金属如锂、钠或钾的氢氧化物如氢氧化钠,还可以是碱金属的碳酸盐如碳酸钠,也可以是有机碱如三乙胺、叔丁醇钠等。
通式II化合物为市售试剂或由其相应的酸制得。
通式III化合物可参考下列文献制备:Bioorganic&Medicinal Chemistry,2012,20(3):1213-1221;WO2005117909;农药,2007,46(5):307-309.
表1列出了部分通式I化合物的结构和物理性质。
Figure BDA0001896901460000022
表1部分通式I化合物的结构和物理性质
Figure BDA0001896901460000023
Figure BDA0001896901460000031
Figure BDA0001896901460000041
Figure BDA0001896901460000051
Figure BDA0001896901460000061
Figure BDA0001896901460000071
部分化合物的1H NMR(600MHz,CDCl3)数据如下:
化合物3:8.52(s,1H),8.25-8.26(m,1H),8.10(s,1H),7.53-7.55(m,1H),7.41-7.42(m,1H),7.23-7.40(m,1H),6.77(d,J=7.9Hz,1H),3.86(s,3H),2.23(s,3H).
化合物7:8.58(s,1H),7.81(d,J=5.5Hz,1H),7.47(s,1H),7.40(s,1H),7.22(d,J=5.8Hz,2H),6.77(d,J=7.9Hz,1H),3.85(s,3H),2.74(s,3H),2.17(s,3H).
化合物11:8.82(s,1H),8.05(s,1H),7.63(s,1H),7.49(s,1H),7.26(s,2H),6.79(s,1H),3.85(s,3H),2.16(s,3H).
化合物15:8.50(d,J=3.3Hz,1H),8.23(d,J=7.6Hz,1H),8.11(s,1H),7.51(d,J=8.1Hz,1H),7.39(dd,J1=7.5Hz,J2=4.8Hz,1H),7.19(t,J=8.2Hz,1H),6.76(d,J=8.2Hz,1H),4.05(q,J=6.9Hz,2H),2.22(s,3H),1.44(t,J=7.0Hz,3H).
化合物19:9.05(dd,J1=4.9Hz,J2=1.4Hz,1H),8.27(dd,J1=7.6Hz,J2=1.4Hz,1H),7.70(dd,J1=7.6Hz,J2=5.0Hz,1H),7.27(dd,J1=9.3Hz,J2=6.9Hz,1H),6.95(d,J=8.3Hz,1H),6.83(d,J=7.8Hz,1H),4.08(q,J=7.0Hz,2H),2.06(s,3H),1.45(t,J=7.0Hz,3H).
化合物23:8.82(d,J=4.3Hz,1H),8.05(d,J=7.7Hz,1H),7.62(dd,J1=7.7Hz,J2=4.8Hz,1H),7.48(d,J=8.1Hz,1H),7.29(s,1H),7.21(t,J=8.2Hz,1H),6.77(d,J=8.2Hz,1H),4.05(q,J=7.0Hz,2H),2.16(s,3H),1.43(t,J=7.0Hz,3H).
化合物39:8.52(dd,J=4.7,1.9Hz,1H),8.26(dd,J1=7.6Hz,J2=1.8Hz,1H),8.07(s,1H),7.55(d,J=8.1Hz,1H),7.41(dd,J1=7.6Hz,J2=4.7Hz,1H),7.20(t,J=8.2Hz,1H),6.79(d,J=8.2Hz,1H),4.54(dt,J1=12.1Hz,J2=6.0Hz,1H),2.22(s,3H),1.35(d,J=6.0Hz,6H).
化合物43:8.57(s,1H),7.78(s,1H),7.45(s,2H),7.19(d,J=5.9Hz,2H),6.77(d,J=8.0Hz,1H),4.53(dt,J1=11.9Hz,J2=5.9Hz,1H),2.73(s,3H),2.15(s,3H),1.34(d,J=6.0Hz,6H).
化合物47:8.82(d,J=4.0Hz,1H),8.05(d,J=7.7Hz,1H),7.62(dd,J1=7.7Hz,J2=4.8Hz,1H),7.48(d,J=8.1Hz,1H),7.27(s,1H),7.20(t,J=8.2Hz,1H),6.79(d,J=8.3Hz,1H),4.54(dt,J1=12.1Hz,J2=6.0Hz,1H),2.14(s,3H),1.35(d,J=6.1Hz,6H).
化合物63:8.51(d,J=3.7Hz,1H),8.24(d,J=7.5Hz,1H),8.09(s,1H),7.52(d,J=8.1Hz,1H),7.40(dd,J1=7.5Hz,J2=4.8Hz,1H),7.19(t,J=8.2Hz,1H),6.77(d,J=8.3Hz,1H),4.32(dd,J1=12.0Hz,J2=6.0Hz,1H),2.22(s,3H),1.81-1.72(m,1H),1.70-1.60(m,1H),1.30(d,J=6.1Hz,3H),0.99(t,J=7.4Hz,3H).
化合物67:8.59(s,1H),7.81(d,J=5.6Hz,1H),7.48(s,1H),7.35(s,1H),7.20(d,J=8.5Hz,2H),6.76(d,J=8.0Hz,1H),4.32(dt,J1=11.9Hz,J2=5.9Hz,1H),2.75(s,3H),2.17(s,3H),1.81-1.71(m,1H),1.71-1.60(m,1H),1.30(d,J=6.1Hz,3H),0.99(t,J=7.4Hz,3H).
化合物7167:8.81(d,J=4.4Hz,1H),8.04(d,J=7.7Hz,1H),7.62(dd,J1=7.7Hz,J2=4.8Hz,1H),7.46(d,J=8.0Hz,1H),7.29(s,1H),7.20(t,J=8.2Hz,1H),6.78(d,J=8.3Hz,1H),4.32(dd,J1=12.0Hz,J2=6.0Hz,1H),2.15(s,3H),1.80-1.72(m,1H),1.71-1.61(m,1H),1.30(d,J=6.1Hz,3H),0.99(t,J=7.4Hz,3H).
化合物85:9.09(s,1H),8.73(d,J=2.4Hz,1H),8.20(d,J=4.4Hz,1H),8.04(s,1H),7.42-7.39(m,1H),7.15(t,J=4.2Hz,1H),6.75(d,J=1.6Hz,1H),4.38(dd,J1=12.1Hz,J2=6.0Hz,1H),2.17(s,3H),1.80-1.70(m,1H),1.62-1.54(m,1H),1.53-1.36(m,2H),1.29(d,J=4.0Hz,3H),0.94(t,J=3.6Hz,3H).
化合物86:8.67(t,J=8.7Hz,1H),8.49(d,J=14.9Hz,1H),8.37(d,J=4.3Hz,1H),7.62(d,J=8.1Hz,1H),7.46-7.39(m,1H),7.18(t,J=8.2Hz,1H),6.76(d,J=8.3Hz,1H),4.38(dd,J1=12.1Hz,J2=6.0Hz,1H),2.22(s,3H),1.80-1.70(m,1H),1.62-1.54(m,1H),1.53-1.36(m,2H),1.30(d,J=6.1Hz,3H),0.95(t,J=7.4Hz,3H).
化合物8767:8.50(s,1H),8.23(s,1H),8.11(s,1H),7.50(s,1H),7.40(s,1H),7.18(t,J=8.1Hz,1H),6.77(d,J=8.3Hz,1H),4.39(dd,J1=12.1Hz,J2=6.0Hz,1H),2.21(s,3H),1.81-1.70(m,1H),1.62-1.53(m,1H),1.52-1.37(m,2H),1.30(d,J=6.1Hz,3H),0.95(t,J=7.4Hz,3H).
化合物88:8.47(d,J=3.1Hz,1H),8.04(d,J=7.4Hz,1H),7.80(s,1H),7.50(d,J=7.8Hz,1H),7.40(dd,J1=7.3Hz,J2=4.8Hz,1H),7.19(t,J=8.1Hz,1H),6.77(d,J=8.4Hz,1H),4.37(dd,J1=12.0Hz,J2=6.0Hz,1H),2.22(s,3H),1.80-1.65(m,1H),1.64-1.55(m,1H),1.48-1.36(m,3H),1.30(d,J=6.0Hz,3H),0.92(t,J=6.9Hz,3H).
化合物9067:8.64(s,1H),8.16(s,1H),7.72-7.70(m,1H),7.55(s,1H),7.35-7.33(m,1H),7.18-7.16(m,1H),6.78-6.76(m,1H),4.36(q,1H),2.16(s,3H),1.78-1.58(m,2H),1.45-1.34(m,2H),1.30(d,3H),0.95(t,3H).
化合物9167:8.59(s,1H),7.81(s,1H),7.47(s,1H),7.37(s,1H),7.20(d,J=17.2Hz,2H),6.76(d,J=7.7Hz,1H),4.38(d,J=5.6Hz,1H),2.75(s,3H),2.16(s,3H),1.79-1.68(m,1H),1.63-1.52(m,1H),1.49-1.43(m,2H),1.30(d,J=5.7Hz,3H),0.95(t,J=7.2Hz,3H).
化合物9267:8.64(s,1H),7.78(s,1H),7.50(s,1H),7.30(s,1H),7.22-7.18(m,1H),6.76(s,1H),4.37(d,J=5.6Hz,1H),3.06(q,2H),2.16(s,3H),1.77-1.69(m,1H),1.64-1.57(m,1H),1.47-1.43(m,2H),1.39-1.34(m,2H),1.30(d,J=5.7Hz,3H),0.95(t,J=7.2Hz,3H).
化合物95:8.81(d,J=4.1Hz,1H),8.04(d,J=7.7Hz,1H),7.62(dd,J1=7.7Hz,J2=4.8Hz,1H),7.45(d,J=8.0Hz,1H),7.30(s,1H),7.19(t,J=8.2Hz,1H),6.78(d,J=8.3Hz,1H),4.39(dd,J1=12.1Hz,J2=6.1Hz,1H),2.14(s,3H),1.80-1.72(m,1H),1.62-1.54(m,1H),1.51-1.38(m,2H),1.30(d,J=6.1Hz,3H),0.95(t,J=7.4Hz,3H).
化合物96:8.81(s,1H),8.19-8.17(m,1H),7.76-7.74(m,2H),7.47-7.40(m,5H),7.12-7.09(m,1H),6.92(s,1H),6.66-6.64(m,1H),4.30-4.26(m,1H),1.73-1.59(m,3H),1.55-1.52(m,3H),1.43-1.32(m,3H),1.31(d,3H),0.89(t,3H).
化合物11095:8.67(t,J=7.8Hz,1H),8.49(d,J=14.3Hz,1H),8.37(s,1H),7.62(d,J=7.9Hz,1H),7.44-7.36(m,1H),7.18(t,J=7.8Hz,1H),6.75(d,J=8.1Hz,1H),4.37(dd,J1=11.6Hz,J2=5.7Hz,1H),2.22(s,3H),1.76(s,1H),1.71-1.66(m,1H),1.64-1.53(m,1H),1.47-1.40(m,1H),1.35(d,J=6.5Hz,2H),1.30(d,J=6.0Hz,3H),0.91(d,J=6.4Hz,3H).
化合物111:8.51(dd,J1=4.6Hz,J2=1.7Hz,1H),8.25(dd,J1=7.6Hz,J2=1.6Hz,1H),8.09(s,1H),7.52(d,J=7.9Hz,1H),7.41(dd,J1=7.6Hz,J2=4.8Hz,1H),7.19(t,J=8.2Hz,1H),6.77(d,J=8.4Hz,1H),4.37(dd,J1=12.1Hz,J2=6.0Hz,1H),2.22(s,3H),1.82-1.73(m,1H),1.72-1.65(m,1H),1.64-1.56(m,1H),1.48-1.41(m,1H),1.40-1.32(m,2H),1.30(d,J=6.0Hz,3H),0.92(t,J=7.1Hz,3H).
化合物112:8.47(d,J=3.1Hz,1H),8.04(d,J=7.4Hz,1H),7.80(s,1H),7.50(d,J=7.8Hz,1H),7.40(dd,J1=7.3Hz,J2=4.8Hz,1H),7.19(t,J=8.1Hz,1H),6.77(d,J=8.4Hz,1H),4.37(dd,J1=12.0Hz,J2=6.0Hz,1H),2.22(s,3H),1.77-1.72(m,1H),1.71-1.65(m,1H),1.64-1.54(m,1H),1.49-1.40(m,1H),1.39-1.31(m,2H),1.30(d,J=6.0Hz,3H),0.92(t,J=6.9Hz,3H).
化合物114:8.58(d,1H),8.10(d,1H),7.75(s,1H),7.68-7.66(m,1H),7.26-7.25(m,1H),7.15-7.12(m,1H),6.76-6.75(m,1H),4.37(q,1H),2.11(s,3H),1.77-1.38(m,6H),1.29(d,J=6.0Hz,3H),0.94(t,J=7.1Hz,3H).
化合物115:8.58(s,1H),7.80(d,J=6.1Hz,1H),7.46(s,1H),7.40(s,1H),7.19(d,J=7.6Hz,2H),6.76(d,J=8.2Hz,1H),4.37(dd,J1=12.0Hz,J2=6.0Hz,1H),2.74(s,3H),2.16(s,3H),1.82-1.72(m,1H),1.71-1.65(m,1H),1.64-1.56(m,1H),1.48-1.40(m,1H),1.40-1.31(m,2H),1.30(d,J=6.0Hz,3H),0.91(t,J=7.1Hz,3H).
化合物116:8.64(s,1H),7.80(s,1H),7.51(s,1H),7.28(s,1H),7.20-7.22(m,1H),6.76(s,1H),4.40-4.37(m,1H),3.06(q,2H),2.16(s,3H),1.75-1.48(m,3H),1.75-1.43(m,4H),1.39-1.34(m,2H),1.36(t,3H),1.30(d,J=5.7Hz,3H),0.95(t,J=7.2Hz,3H).
化合物119:8.82(d,J=4.5Hz,1H),8.05(d,J=7.7Hz,1H),7.62(dd,J1=7.7Hz,J2=4.8Hz,1H),7.47(d,J=7.9Hz,1H),7.27(s,1H),7.20(t,J=8.2Hz,1H),6.77(d,J=8.4Hz,1H),4.37(dd,J1=12.1Hz,J2=6.1Hz,1H),2.15(s,3H),1.80-1.73(m,1H),1.72-1.66(m,1H),1.64-1.55(m,1H),1.47-1.40(m,1H),1.39-1.31(m,2H),1.30(d,J=6.0Hz,3H),0.91(t,J=7.0Hz,3H).
化合物120:8.80(s,1H),8.18(s,1H),7.76-7.74(m,2H),7.48-7.44(m,4H),7.42-7.40(m,1H),7.12-7.09(m,1H),6.92(s,1H),6.66-6.65(m,1H),4.32-4.27(m,1H),1.82-1.71(m,3H),1.51(s,3H),1.39-1.32(m,3H),1.23(d,3H),0.91(t,3H).
化合物123:8.78(d,J=4.1Hz,1H),8.00(d,J=7.7Hz,1H),7.58(dd,J1=7.7Hz,J2=4.8Hz,1H),7.40(d,J=8.0Hz,1H),7.38(s,1H),7.19(t,J=8.2Hz,1H),6.77(d,J=8.3Hz,1H),4.39(q,1H),2.12(s,3H),1.80-1.72(m,1H),1.62-1.54(m,1H),1.51-1.38(m,2H),1.30(d,J=6.1Hz,3H),0.95(t,J=7.4Hz,3H).
化合物124:8.77(d,J=4.1Hz,1H),7.98(d,J=7.7Hz,1H),7.57(dd,J1=7.7Hz,J2=4.8Hz,1H),7.41(d,J=8.0Hz,1H),7.38(s,1H),7.17(t,J=8.2Hz,1H),6.77(d,J=8.3Hz,1H),4.38(q,1H),2.12(s,3H),1.80-1.72(m,1H),1.58-1.54(m,1H),1.51-1.38(m,2H),1.30(d,J=6.1Hz,3H),0.95(t,J=7.4Hz,3H).
本发明还包括通式I化合物用于控制病害的用途,以防治卵菌纲(Oomycetes)、子囊菌纲(Ascomycetes)、担子菌纲(Basidiomycetes)、半知菌纲(Deuteromycetes)、根肿菌纲(Plasmodiophoromycetes)、壶菌纲(Chytridiomycetes)和结合菌亚纲(Zygomycetes)病害。
在上面列出的纲名下的某些病害的实例可提及的包括但不限于:
小麦锈病、小麦白粉病、小麦赤霉病、小麦根腐病、小麦纹枯病、小麦全蚀病、小麦颖枯病、黄瓜霜霉病、黄瓜炭疽病、黄瓜枯萎病、黄瓜灰霉病、葡萄霜霉病、番茄早疫病、番茄晚疫病、水稻纹枯病、水稻稻瘟病、西瓜蔓枯病、花生疮痂病、花生黑斑病、柑橘疮痂病、辣椒根腐病、棉花黄萎病、棉花枯萎病、油菜黑茎病、油菜菌核病、梨黑星病、人参锈腐病、玉米锈病、玉米弯孢病、玉米大斑病、芒果蒂腐病、苹果轮纹病、苹果腐菌烂病、香蕉叶斑病。
本发明还包括以通式I化合物作为活性组分的杀菌组合物。该杀菌组合物中作为活性组分的通式I化合物的重量百分含量在1-99%之间。该杀菌组合物中还包括农业上可接受的载体。
本发明的组合物可以制剂的形式施用。通式I化合物作为活性组分溶解或分散于载体中或配制成制剂以便作为杀菌使用时更易于分散。例如:这些化学制剂可被制成可湿性粉剂或乳油。在这些组合物中,至少加入一种液体或固体载体,并且当需要时可以加入适当的表面活性剂。
本发明的技术方案还包括防治病害的方法:将本发明的杀菌组合物施于所述的病害或其生长介质上。通常选择的较为适宜的有效量为每公顷10克到1000克。
对于某些应用,例如在农业上可在本发明的杀菌组合物中加入一种或多种其它的杀虫剂、杀菌剂、除草剂、植物生长调节剂或肥料等,由此可产生附加的优点和效果。
本发明所具有的优点:
同已知的吡啶酰胺类化合物相比,本发明化合物结构新颖,并且本发明的吡啶酰胺类化合物具有意想不到的高杀菌活性,在较低剂量下也具有高的杀菌活性,不仅高效,而且减少了农药的使用量,降低了成本,减少了对环境的污染。
具体实施方式
下列合成实施例、生物活性测定实施例可用来进一步说明本发明,但不意味着限制本发明。
合成实施例
实施例1化合物87的制备:
Figure BDA0001896901460000111
反应瓶中加入2-氯烟酸(150毫克,0.95毫摩尔)、10毫升甲苯和1毫升氯化亚砜,回流反应2小时,旋除多余的氯化亚砜和溶剂备用。2-甲基-3-(己基-2-氧基)苯胺(184毫克,0.95毫摩尔)溶于10毫升二氯甲烷,加入1毫升三乙胺。将制备好的酰氯溶于二氯甲烷,滴加到上述混合液中,常温反应2小时。反应液倾入至30毫升水中,二氯甲烷萃取三次,取有机层,有机层依次用饱和碳酸氢钠水溶液、饱和食盐水洗涤,无水硫酸镁干燥,减压蒸尽溶剂。残余物通过柱色谱提纯(淋洗液:乙酸乙酯:石油醚=1:1),得200毫克化合物87,收率62.5%。
实施例2化合物111的制备:
Figure BDA0001896901460000112
反应瓶中加入2-氯烟酸(150毫克,0.95毫摩尔)、10毫升甲苯和1毫升氯化亚砜,回流反应2小时,旋除多余的氯化亚砜和溶剂备用。2-甲基-3-(己基-2-氧基)苯胺(197毫克,0.95毫摩尔)溶于10毫升二氯甲烷,加入1毫升三乙胺。将制备好的酰氯溶于二氯甲烷,滴加到上述混合液中,常温反应2小时。反应液倾入至30毫升水中,二氯甲烷萃取三次,取有机层,有机层依次用饱和碳酸氢钠水溶液、饱和食盐水洗涤,无水硫酸镁干燥,减压蒸尽溶剂。残余物通过柱色谱提纯(淋洗液:乙酸乙酯:石油醚=1:1),得180毫克化合物111,收率53.6%。
本发明的其他通式I化合物可参照上述方法合成。
生物活性测定实施例
实施例3杀菌活性的测定
用上述获得的本发明化合物对植物的多种病害进行了试验。试验的方法如下:
(1)活体保护活性试验
试验采用盆栽幼苗测定法。选择生长一致的两叶期盆栽黄瓜幼苗作为黄瓜霜霉病的试验寄主植物;选择生长一致的两叶期盆栽小麦幼苗作为小麦白粉病的试验寄主植物,选择生长一致的两叶期盆栽玉米幼苗作为玉米锈病的试验寄主植物。用本发明化合物按照设计浓度进行叶面喷雾处理。另设喷清水的空白对照,3次重复,处理后第二天进行病害接种。接种后,将植物放在人工气候室中保湿培养(温度:昼25℃、夜20℃,相对湿度:95-99%)。试验材料培养24h后,移置温室培养,将不需要保湿培养的植物直接在温室内接种并培养。带对照充分发病后(通常为一周时间)进行化合物防病效果评估。结果调查参照美国植病学会编写的《A Manual of Assessment Keys for Plant Diseases》,用100~0来表示,以“100”级代表无病和“0”级代表最严重的发病程度。
部分测试结果如下:
对玉米锈病的防效:
部分供试的化合物中,下列化合物在浓度为25ppm时防治效果较好,抑制率≥80%:化合物3、7、11、15、19、23、39、47、67、71、86、87、88、91、95、110、111、112、115、123、124和128。
按照以上测试方法,选取化合物87和111与已知化合物KC1和KC2进行了防治玉米锈病活性的平行测定。试验结果见表3。
表3:部分本发明化合物与已知化合物对玉米锈病防效的比较
Figure BDA0001896901460000121
“/”表示未进行测试。
(2)离体抑菌活性试验
测定方法如下:采用高通量筛选方法,即将待测化合物样品用适合的溶剂(溶剂的种类如丙酮、甲醇、DMF等,并依据其对样品的溶解能力而选择)溶剂,配成所需浓度待测液。在超净工作环境下,将待测液加入到96孔培养板的微孔中,再将病原菌繁殖体悬浮液加入其中,处理后的培养板放置在恒温培养箱中培养,24小时后进行调查。调查时目测病原菌繁殖体萌发或生长情况,并根据对照处理的萌发或生长情况,评价化合物抑菌活性。
部分化合物的离体抑菌活性(以抑制率表示)测试结果如下:
水稻稻瘟病菌:
部分供试的化合物中,下列化合物在浓度为25ppm时防治效果较好,抑制率≥80%:化合物87、91、111、115和119。

Claims (8)

1.一种吡啶酰胺类化合物,其特征在于:化合物如通式I所示:
Figure FDA0001896901450000011
式中:
R1选自氢、卤素、硝基、氰基、三氟甲基、苯基或C1-C12的烷基;
R2选自C1-C12的烷基。
2.按照权利要求1所述的化合物,其特征在于,所述通式I所示化合物还可为手性化合物,手性化合物构型选自R构型、S构型或RS混合构型。
3.按照权利要求1或2所述的化合物,其特征在于,通式I中:
R1选自氢、卤素、硝基、三氟甲基、苯基或C1-C6的烷基;
R2选自C1-C8的烷基。
4.按照权利要求3所述的化合物,其特征在于,通式I中:
R1选自氢、氟、氯、溴、碘、硝基、三氟甲基、苯基、甲基、乙基、丙基或异丙基;
R2选自甲基、乙基、丙基、异丙基、丁基、2-丁基、戊基、2-戊基、己基或2-己基。
5.按照权利要求4所述的化合物,其特征在于,通式I中:
R1选自氢、氟、氯、溴、硝基、甲基或三氟甲基;
R2选自2-戊基或2-己基。
6.一种按照权利要求1所述的吡啶酰胺类化合物的应用,其特征在于:所述通式I化合物用于制备控制农业、林业或非治疗目的植物病害的药物。
7.一种杀菌组合物,其特征在于:杀菌组合物是以权利要求1所述的通式I所示化合物为活性组分和农业或林业可接受的载体,组合物中作为活性组分的通式I化合物的重量含量为1-99%。
8.一种控制植物病害的方法,其特征在于:将权利要求7所述的组合物以每公顷10克到1000克的有效剂量施于需要控制的病害或其生长的介质上。
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