1H-1,2,4-三唑-5-氨基甲酸酯類化合物的合成、 結(jié)構(gòu)表征及殺蟲、 抑菌活性

賈長青, 楊冬燕, 車傳亮, 馬永強(qiáng), 芮昌輝, 閆曉靜, 覃兆海

(1. 中國農(nóng)業(yè)大學(xué)理學(xué)院, 北京 100193; 2. 中國農(nóng)業(yè)科學(xué)院植物保護(hù)研究所, 北京 100193)

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1H-1,2,4-三唑-5-氨基甲酸酯類化合物的合成、 結(jié)構(gòu)表征及殺蟲、 抑菌活性

賈長青1, 楊冬燕1, 車傳亮1, 馬永強(qiáng)1, 芮昌輝2, 閆曉靜2, 覃兆海1

(1. 中國農(nóng)業(yè)大學(xué)理學(xué)院, 北京 100193; 2. 中國農(nóng)業(yè)科學(xué)院植物保護(hù)研究所, 北京 100193)

摘要通過活性基團(tuán)拼接的方法, 將氨基甲酸酯結(jié)構(gòu)和1H-1,2,4-三唑-5-胺有機(jī)結(jié)合, 設(shè)計(jì)合成了一系列結(jié)構(gòu)新穎的多取代1H-1,2,4-三唑-5-氨基甲酸酯類化合物(5和6), 所有化合物的結(jié)構(gòu)經(jīng)核磁共振(NMR), 紅外光譜(IR), 高分辨質(zhì)譜(HRMS)及元素分析等方法確證.初步殺蟲活性測定結(jié)果表明, 大部分化合物對桃蚜[Myzus persicae(Sulzer)]具有良好的殺蟲活性, 致死率大于90%. 精密毒力測試結(jié)果表明, 化合物5b的半致死濃度(LC50)為9.49 μg/mL, 具有進(jìn)一步研究開發(fā)的價(jià)值.抑菌活性初步測試結(jié)果表明該類化合物的抑菌活性一般, 在50 μg/mL濃度下少數(shù)化合物也表現(xiàn)出一定的離體抑菌活性. 對此類化合物的構(gòu)效關(guān)系進(jìn)行了討論.

關(guān)鍵詞1H-1,2,4-三唑-5-胺; 氨基甲酸酯; 殺蟲活性; 抑菌活性

氨基甲酸酯類農(nóng)藥是基于天然產(chǎn)物毒扁豆生物堿開發(fā)的繼有機(jī)磷之后出現(xiàn)的一類高活性農(nóng)藥品種, 作為殺蟲劑、 殺菌劑及除草劑被廣泛應(yīng)用. 在該類農(nóng)藥中, 氨基甲酸酚(或肟)酯多表現(xiàn)出強(qiáng)烈的殺蟲活性, 如呋喃丹、 涕滅威及克百威等, 而芳氨基甲酸酯則表現(xiàn)出良好的殺菌活性, 如多菌靈(1)和苯菌靈(2)等(結(jié)構(gòu)見圖1). 雖然該類化合物發(fā)現(xiàn)較早并得到較充分的開發(fā), 但氨基甲酸酯類化合物表現(xiàn)出的高效、 速效及易降解等特點(diǎn)使氨基甲酸酯結(jié)構(gòu)仍具有活力[1,2]. 如BASF公司將氨基甲酸酯結(jié)構(gòu)引入到Strobilurin類殺菌劑中, 于1993年研發(fā)了唑菌胺酯(Pyraclostrobin, 3, 結(jié)構(gòu)見圖1)[3,4]. 1,2,4-三唑類農(nóng)藥是另一個(gè)重要的農(nóng)藥品種, 該品種具有廣譜、 高效的抑菌活性和優(yōu)良的殺蟲、 除草及植物生長調(diào)節(jié)活性, 使得1,2,4-三唑及其衍生物受到廣泛關(guān)注[5～12]. 另外, 在醫(yī)藥領(lǐng)域中, 許多含有1,2,4-三唑氨基甲酸酯結(jié)構(gòu)的化合物具有抗菌[13]、 抗腫瘤[14]及抑制脂肪酸酰胺水解酶(FAAH)[15]等活性; 在農(nóng)藥領(lǐng)域中, 含有1,2,4-三唑基團(tuán)的氨基甲酸酯化合物也表現(xiàn)出較好的殺螺[16]、 殺菌[17]和植物生長調(diào)節(jié)[18]活性.

Fig.1　Structrue of compounds 1—3

前文[19]報(bào)道了一類結(jié)構(gòu)新穎且合成簡便的1,3-二取代-1H-1,2,4-三唑-5-氨類化合物(4), 其結(jié)構(gòu)易于衍生且部分化合物具有較好的抑菌活性, 該類化合物具有作為農(nóng)藥活性結(jié)構(gòu)的潛力. 鑒于多取代1H-1,2,4-三唑-5-氨基甲酸酯類化合物的合成和生物活性研究尚未見報(bào)道, 也為了進(jìn)一步尋找活性優(yōu)異的1H-1,2,4-三唑類衍生物, 本文通過活性基團(tuán)拼接的方法, 將氨基甲酸酯結(jié)構(gòu)單元引入到該類化合物中, 設(shè)計(jì)合成了目標(biāo)化合物(如Scheme1所示), 并對其抑菌和殺蟲活性進(jìn)行了研究.

4a, 5a: R1=n-Pr, R2=Cl; 4b, 5b: R1=n-Bu, R2=Cl; 4c, 5c: R1=H, R2=Et; 4d, 5d: R1=H, R2=Allyl; 4e, 5e: R1=2-NO2, R2=Et; 4f, 5f: R1=2-NO2, R2=n-Pr; 4g, 5g: R1=2-NO2, R2=n-Bu; 4h, 5h: R1=2-NO2, R2=Allyl; 4i, 5i, 6b: R1=2-Cl, R2=Et; 4j, 5j: R1=2-Cl, R2=n-Bu; 4k, 5k: R1=2-Cl, R2=Allyl; 4l, 5l: R1=4-OCH3, R2=Et; 4m, 5m: R1=4-OCH3, R2=n-Bu; 4n, 5n: R1=4-Cl, R2=Et; 4o, 5o: R1=4-Cl, R2=n-Pr; 4p, 5p: R1=4-Cl, R2=Allyl; 4q, 5q: R1=4-NO2, R2=Et; 4r, 5r: R1=4-NO2, R2=n-Pr; 4s, 5s: R1=4-NO2, R2= n-Bu; 4t, 5t: R1=4-F, R2=Et; 4u, 5u: R1=4-F, R2=n-Pr; 4v, 5v: R1=4-F, R2=Allyl; 4w, 5w: R1=4-F, R2=n-Bu; 4x, 5x: R1=4-NO2, R2=Allyl; 4y, 6a: R1=H, R2=n-Bu; 4z, 6c: R1=2-OCH3, R2=Et; 4aa, 6d: R1=2-OCH3, R2=Allyl; 4ab, 6e: R1=4-OCH3, R2=n-Pr; 4ac, 6f: R1=4-OCH3, R2=Allyl; 4ad, 6g: R1=4-Cl, R2=n-Bu. Scheme 1　Design and synthesis of target compounds 5 and 6

1實(shí)驗(yàn)部分

1.1試劑與儀器

所用試劑均為國產(chǎn)分析純, 購自北京偶合科技有限公司.

Yanagimoto熔點(diǎn)測定儀(日本MFG公司);AvanceDPX300型核磁共振儀(TMS為內(nèi)標(biāo),DMSO-d6為溶劑, 德國Bruker公司);ST-Carloerba元素分析儀(采用FlashEA1112法, 德國Elementar公司);VECTOR22型紅外光譜儀(KBr壓片, 德國Bruker公司);ThermoScientificLTQOrbitrapDiscovery型高分辨質(zhì)譜儀(德國Bremen公司).

1.2實(shí)驗(yàn)過程

1.2.1中間體化合物4的合成中間體化合物4參照文獻(xiàn)[19]方法合成, 其中化合物4a, 4b和4q～4x尚未見文獻(xiàn)報(bào)道, 各中間體的表征結(jié)果分別列于表1和表2.

Table 1　Melting point data of intermediate compounds 4

Table 2　1H NMR data of intermediate compounds 4a, 4b and 4q—4x

1.2.2目標(biāo)化合物5a～5x的合成稱取中間體化合物4(1.5mmol, 0.5g)加入50mL單口燒瓶中, 用10mL丙酮使其完全溶解, 再加入1mL3mol/LNaOH水溶液, 室溫下攪拌反應(yīng)0.5h后, 加入氯甲酸乙酯(1.6mol, 0.17g), 繼續(xù)反應(yīng)2h. 過濾, 濾去析出的固體, 將濾液濃縮, 用硅膠柱層析[V(乙酸乙酯)∶V(石油醚)=1∶6], 得目標(biāo)化合物5a～5x.

1.2.3目標(biāo)化合物6a～6g的合成稱取中間體化合物4(1.5mmol, 0.5g)加入50mL單口燒瓶中, 用10mL丙酮使其完全溶解, 再加入1mL3mol/LNaOH水溶液, 室溫下攪拌反應(yīng)30min后, 加入氯甲酸乙酯(3.2mol, 0.34g), 繼續(xù)反應(yīng)4h. 過濾, 濾去析出的固體鹽, 將濾液濃縮, 用硅膠柱層析[V(乙酸乙酯)∶V(石油醚)=1∶8], 得目標(biāo)化合物6a～6g. 目標(biāo)化合物的表征結(jié)果見表3和表4.

Table 3　Appearance, melting point, yield, elemental analysis and IR data of target compounds

Continued.

Compd.Appearancem.p./℃Yield(%)Elementalanalysis(%,calcd.)CHNIR(KBr),ν/cm-15nWhitepowder114—1154452.79(52.98)5.11(5.13)18.88(19.01)3166,2977,1741,1580,1462,1430,1260,1233,1132,1089,837,7505oWhitepowder115—1164854.50(54.46)5.50(5.55)17.90(18.15)3448,3191,2970,2937,1777,1744,1464,1586,1426,1374,1324,1259,1288,1092,857,7515pWhitepowder80—815354.71(54.82)5.11(4.93)18.20(18.26)3468,3184,3079,2982,1743,1579,1557,1457,1428,1256,1230,1064,838,7515qYellowsolid197—1985651.17(51.14)4.98(4.95)22.90(22.94)3463,3209,2986,1699,1605,1568,1521,1341,1274,1237,1068,854,7275rYellowsolid169—1705452.61(52.66)5.46(5.37)21.77(21.93)3216,3083,2978,2944,1699,1604,1561,1523,1342,1265,1227,1065,854,7275sYellowsolid150—1514654.33(54.05)5.92(5.75)20.76(21.01)3237,3090,2960,2874,1704,1604,1561,1524,1468,1341,1263,1070,866,7275tWhitepowder114—1155356.26(56.11)5.59(5.43)20.08(20.13)3183,3069,2976,2941,1745,1601,1561,1466,1431,1262,1233,1058,845,7555uWhitepowder115—1164757.44(57.52)5.99(5.86)19.08(19.17)3473,3186,3066,2976,2941,1745,1601,1563,1467,1428,1255,1229,1150,1061,848,7575vWhitepowder89—904958.11(57.92)5.43(5.21)19.29(19.30)3186,3066,2980,2938,1744,1601,1562,1467,1431,1256,1228,1188,1062,848,7565waWhitepowder54—55483194,3067,2962,2932,2876,1742,1609,1567,1469,1431,1249,1226,1060,850,7555xbYellowsolid175—176463434,3210,2984,1701,1604,1653,1524,1464,1324,1206,1066,855,7276aWhitepowder83—844459.71(59.99)6.73(6.71)15.54(15.55)3453,2981,2960,2874,1778,1645,1589,1580,1447,1370,1323,1264,1208,1099,855,775,7026bWhitepowder96—974552.24(52.39)5.28(5.22)15.33(15.27)3445,3050,2988,1781,1657,1613,1582,1562,1471,1367,1324,1252,1201,1150,1073,857,773 6cWhitepowder93—944056.40(56.34)6.20(6.12)15.54(15.46)3438,2973,2939,2841,1774,1658,1601,1445,1372,1305,1264,1202,1075,850,7756dWhitepowder104—1054157.73(57.75)6.01(5.92)15.00(14.96)3440,2904,1775,1658,1603,1469,1437,1327,1215,1140,1045,927,7736eWhitesolid107—1084257.46(57.74)6.54(6.43)14.93(14.88)3443,2971,2935,2842,1776,1645,1615,1587,1562,1508,1372,1325,1259,1210,1180,1068,857,7366fWhitepowder98—994257.77(57.75)5.81(5.92)15.03(14.96)3442,2978,2840,1778,1646,1589,1563,1507,1372,1327,1264,1212,1179,1067,858,7646gcWhitepowder89—90493439,3091,2983,2937,2899,2875,1778,1647,1587,1442,1370,1321,1265,1204,1100,857,730

a.HRMScalcd.forC15H19FN4O2[M+H]+307.1564,found307.1564; b.HRMScalcd.forC14H15N5O4[M+H]+318.1197,found318.1201; c.HRMScalcd.forC18H23ClN4O4[M+H]+395.1480,found395.1484.

Table 4　1H NMR and 13C NMR data of target compounds

Continued.

Compd.1HNMR(DMSO-d6,300MHz),δ13CNMR(DMSO-d6,75MHz),δ5c10.08(brs,1H,NH),7.96—7.92(m,5H,Ph),4.16(q,J=7.08Hz,2H,OCH2),4.05(q,J=7.20Hz,2H,CH2N),1.38(t,J=7.20Hz,3H,OCH2CH3),1.24(t,J=7.11Hz,3H,CH3)158.76,153.96,147.11,131.14,129.18,128.82,125.53,61.57,42.89,14.48,14.455d10.15(brs,1H,NH),7.95—7.40(m,5H,Ph),6.02—5.91(m,1H,CH),5.25—5.14(m,2H,CH2),4.73—4.70(m,2H,CH2N),4.16(q,J=7.08Hz,2H,OCH2),1.24(t,J=7.05Hz,3H,CH3)158.85,153.75,147.66,132.42,130.98,129.27,128.84,125.56,118.34,61.57,50.40,14.485e10.18(brs,1H,NH),7.96—7.63(m,4H,NO2Ph),4.17(q,J=7.11Hz,2H,OCH2),4.04(q,J=7.23Hz,2H,CH2N),1.35(t,J=7.17Hz,3H,OCH2CH3),1.24(t,J=7.08Hz,3H,CH3)155.15,153.81,148.88,147.28,132.27,130.49,129.86,123.73,123.63,61.67,43.15,14.45,14.365f10.17(brs,1H,NH),7.95—7.63(m,4H,NO2Ph),4.15(q,J=7.08Hz,2H,OCH2),3.98(t,J=7.08Hz,2H,CH2N),1.79—1.75(m,2H,CH2),1.24(t,J=7.08Hz,3H,OCH2CH3),0.84(t,J=7.35Hz,3H,CH3)155.14,153.74,148.92,147.72,132.27,130.47,129.90,123.73,123.71,61.44,49.42,22.16,14.44,10.845g10.19(brs,1H,NH),7.95—7.63(m,4H,NO2Ph),4.15(q,J=7.11Hz,2H,OCH2),4.01(t,J=7.05Hz,2H,CH2N),1.75—1.71(m,2H,CH2),1.29—1.25(m,2H,CH2),1.23(t,J=7.29Hz,3H,OCH2CH3),0.88(t,J=7.26Hz,3H,CH3)155.11,153.74,148.91,147.63,132.25,130.45,129.88,123.71,123.69,61.64,47.56,30.70,19.13,14.44,13.465h10.08(brs,1H,NH),7.77—7.47(m,4H,NO2Ph),5.84—5.72(m,1H,CH),5.08—4.93(m,2H,CH2),4.56—4.54(m,2H,CH2N),3.98(q,J=7.11Hz,2H,OCH2),1.06(t,J=7.11Hz,3H,CH3)157.62,155.49,150.65,149.14,133.24,132.67,131.81,131.44,125.88,124.96,118.91,63.38,51.94,14.705i10.13(brs,1H,NH),7.82—7.42(m,4H,ClPh),4.16(q,J=7.08Hz,2H,OCH2),4.07(q,J=7.20Hz,2H,CH2N),1.38(t,J=7.20Hz,3H,OCH2CH3),1.25(t,J=7.08Hz,3H,CH3)157.37,153.92,146.61,131.50,131.14,130.69,130.51,130.03,127.27,61.57,42.96,14.48,14.425j8.57(brs,1H,NH),7.84—7.26(m,4H,ClPh),4.19(q,J=7.12Hz,2H,OCH2),4.11(t,J=7.37Hz,2H,CH2N),1.93—1.89(m,2H,CH2),1.39—1.35(m,2H,CH2),1.24(t,J=7.06Hz,3H,OCH2CH3),0.94(t,J=7.30Hz,3H,CH3)157.36,153.92,147.00,131.56,131.21,130.75,130.60,130.06,127.36,61.62,47.45,30.86,19.27,14.55,13.575k10.21(brs,1H,NH),7.82—7.40(m,4H,ClPh),6.05—5.91(m,1H,CH),5.26—5.14(m,2H,CH2),4.76—4.73(m,2H,CH2N),4.16(q,J=7.08Hz,2H,OCH2),1.24(t,J=7.08Hz,3H,CH3)159.56,155.61,148.60,134.04,132.76,132.48,131.69,131.47,131.24,127.92,119.05,63.37,51.89,14.735l10.03(brs,1H,NH),7.88—6.99(m,4H,OCH3Ph),4.15(q,J=7.11Hz,2H,OCH2),4.01(q,J=7.20Hz,2H,CH2N),3.97(s,3H,OCH3),1.36(t,J=7.20Hz,3H,OCH2CH3),1.24(t,J=7.08Hz,3H,CH3)160.10,158.69,153.96,146.85,126.99,123.78,114.21,61.51,55.31,42.73,14.93,14.855m10.01(brs,1H,NH),7.88—6.98(m,4H,OCH3Ph),4.15(q,J=7.08Hz,2H,OCH2),3.99(t,J=7.11Hz,2H,CH2N),3.79(s,3H,OCH3),1.78—1.74(m,2H,CH2),1.28—1.24(m,2H,CH2),1.24(t,J=7.08Hz,3H,OCH2CH3),0.80(t,J=7.29Hz,3H,CH3)162.00,160.56,159.19,154.17,146.81,126.84,122.82,113.30,61.60,54.07,30.53,18.97,13.04,12.145n10.13(brs,1H,NH),7.96—7.50(m,4H,ClPh),4.16(q,J=7.08Hz,2H,OCH2),4.05(q,J=7.20Hz,2H,CH2N),1.37(t,J=7.20Hz,3H,OCH2CH3),1.24(t,J=7.08Hz,3H,CH3)157.84,153.90,147.32,133.85,129.98,128.97,127.27,61.61,42.98,14.48,14.425o10.11(brs,1H,NH),7.96—7.50(m,4H,ClPh),4.16(q,J=7.08Hz,2H,OCH2),3.99(t,J=7.02Hz,2H,CH2N),1.83—1.78(m,2H,CH2),1.24(t,J=7.05Hz,3H,OCH2CH3),0.86(t,J=7.35Hz,3H,CH3)157.78,153.80,147.73,133.83,129.96,128.95,127.27,61.56,49.28,22.20,14.46,10.955p8.27(brs,1H,NH),7.99—7.35(m,4H,ClPh),6.06—5.96(m,1H,CH),5.32—5.25(m,2H,CH2),4.80—4.77(m,2H,CH2N),4.26(q,J=7.14Hz,2H,OCH2),1.31(t,J=7.11Hz,3H,CH3)158.51,153.73,147.44,135.22,131.33,129.05,128.68,127.52,119.08,62.60,51.94,14.365q10.26(brs,1H,NH),8.35—8.31(m,4H,NO2Ph),4.18(q,J=7.08Hz,2H,OCH2),4.10(q,J=7.20Hz,2H,CH2N),1.40(t,J=7.20Hz,3H,OCH2CH3),1.25(t,J=7.08Hz,3H,CH3)157.03,153.78,147.86,147.76,136.99,126.53,124.33,61.69,43.23,14.49,14.38

Continued.

Compd.1HNMR(DMSO-d6,300MHz),δ13CNMR(DMSO-d6,75MHz),δ5r10.23(brs,1H,NH),8.34—8.16(m,4H,NO2Ph),4.17(q,J=7.08Hz,2H,OCH2),4.03(t,J=7.02Hz,2H,CH2N),1.84—1.80(m,2H,CH2),1.25(t,J=7.08Hz,3H,OCH2CH3),0.87(t,J=7.35Hz,3H,CH3)156.99,153.70,148.28,147.78,136.98,126.55,124.35,61.66,49.50,22.19,14.47,10.955s10.24(brs,1H,NH),8.35—8.17(m,4H,NO2Ph),4.18(q,J=7.05Hz,2H,OCH2),4.08(t,J=7.11Hz,2H,CH2N),1.82—1.78(m,2H,CH2),1.32—1.28(m,2H,CH2),1.26(t,J=7.11Hz,3H,OCH2CH3),0.90(t,J=7.29Hz,3H,CH3)157.03,153.76,148.23,147.79,137.00,126.58,124.39,61.72,47.71,30.83,19.30,14.52,13.565t10.10(brs,1H,NH),7.99—7.25(m,4H,FPh),4.16(q,J=7.08Hz,2H,OCH2),4.04(q,J=7.20Hz,2H,CH2N),1.37(t,J=7.20Hz,3H,OCH2CH3),1.25(t,J=7.08Hz,3H,CH3)164.43,161.17,157.99,153.93,147.20,127.77,127.66,115.99,115.70,61.60,42.90,14.51,14.475u10.09(brs,1H,NH),7.99—7.25(m,4H,FPh),4.16(q,J=7.02Hz,2H,OCH2),3.98(t,J=7.08Hz,2H,CH2N),1.83—1.79(m,2H,CH2),1.24(t,J=7.05Hz,3H,OCH2CH3),0.86(t,J=7.32Hz,3H,CH3)164.45,161.19,157.97,153.88,147.65,127.80,127.69,116.01,115.72,61.60,49.24,22.27,14.52,11.015v10.17(brs,1H,NH),7.99—7.26(m,4H,FPh),6.01—5.93(m,1H,CH),5.25—5.15(m,2H,CH2),4.72—4.70(m,2H,CH2N),4.16(q,J=7.11Hz,2H,OCH2),1.24(t,J=7.11Hz,3H,CH3)164.46,161.20,158.10,153.72,147.75,132.39,127.81,127.53,118.38,115.97,115.69,61.59,50.41,14.475w10.09(brs,1H,NH),7.99—7.25(m,4H,FPh),4.16(q,J=7.11Hz,2H,OCH2),4.01(t,J=7.11Hz,2H,CH2N),1.80—1.75(m,2H,CH2),1.34—1.26(m,2H,CH2),1.24(t,J=7.08Hz,3H,OCH2CH3),0.88(t,J=7.29Hz,3H,CH3)164.40,161.15,157.93,153.85,147.53,127.76,127.65,115.95,115.66,61.54,47.36,30.80,19.25,14.48,13.505x10.31(brs,1H,NH),8.34—8.16(m,4H,NO2Ph),6.03—5.94(m,1H,CH),5.28—5.17(m,2H,CH2),4.77(d,J=5.73Hz,2H,CH2N),4.17(q,J=7.11Hz,2H,OCH2),1.25(t,J=7.08Hz,3H,CH3)157.13,153.57,148.37,147.82,136.82,132.15,126.59,124.35,118.69,61.69,50.67,14.466a7.62—7.50(m,5H,Ph),4.21(q,J=7.21Hz,2H,OCH2),3.98(q,J=7.08Hz,2H,OCH2),3.95(t,J=7.07Hz,2H,CH2N),1.75—1.71(m,2H,CH2),1.35—1.31(m,2H,CH2),1.18(t,J=7.09Hz,3H,OCH2CH3),1.12(t,J=7.12Hz,3H,OCH2CH3),0.91(t,J=7.30Hz,3H,CH3)160.00,149.77,147.33,145.50,131.14,129.10,128.68,125.27,65.45,60.51,46.32,29.61,19.24,14.65,13.54,13.346b7.69—7.49(m,5H,ClPh),4.13(q,J=7.11Hz,2H,OCH2),3.98(q,J=7.24Hz,2H,OCH2),3.97(t,J=7.10Hz,2H,CH2N),1.31(t,J=7.20Hz,3H,OCH2CH3),1.17(t,J=7.09Hz,3H,OCH2CH3),1.02(t,J=7.13Hz,3H,CH3)159.78,148.90,146.95,143.01,133.47,133.07,132.58,129.51,127.74,125.68,65.31,60.57,42.02,14.66,13.27,13.166c7.51—6.96(m,4H,OCH3Ph),4.26(q,J=7.20Hz,2H,OCH2),4.14(q,J=7.13Hz,2H,OCH2),4.08(t,J=7.23Hz,2H,CH2N),3.78(s,3H,OCH3),1.42(t,J=7.22Hz,3H,OCH2CH3),1.32(t,J=7.17Hz,3H,OCH2CH3),1.20(t,J=7.16Hz,3H,CH3)159.90,157.04,149.13,147.45,143.77,133.11,130.83,121.07,114.74,111.35,65.03,60.47,55.66,41.87,14.71,13.48,13.246d7.51—6.90(m,4H,OCH3Ph),6.03—5.93(m,1H,CH),5.38—5.27(m,2H,CH2),4.65—4.62(m,2H,CH2N),4.26(q,J=7.20Hz,2H,OCH2),4.14(t,J=7.12Hz,2H,OCH2),3.77(s,3H,OCH3),1.31(t,J=7.11Hz,3H,OCH2CH3),1.20(t,J=7.17Hz,3H,CH3)160.62,157.20,149.98,147.57,144.52,132.54,131.02,130.61,121.00,119.48,115.37,110.34,64.77,61.23,55.18,49.32,14.59,13.456e7.54—7.05(m,4H,OCH3Ph),4.22(q,J=7.14Hz,2H,OCH2),3.97(q,J=7.07Hz,2H,OCH2),3.89(t,J=6.96Hz,2H,CH2N),3.82(s,3H,OCH3),1.77—1.73(m,2H,CH2),1.82(t,J=7.08Hz,3H,OCH2CH3),1.52(t,J=7.15Hz,3H,OCH2CH3),0.90(t,J=7.36Hz,3H,CH3)161.40,160.08,149.89,147.48,145.48,130.78,117.18,114.12,65.40,60.45,55.53,48.14,21.05,14.63,13.40,10.966f7.55—7.04(m,4H,OCH3Ph),5.99—5.88(m,1H,CH),5.28—5.21(m,2H,CH2),4.57(d,J=5.55Hz,2H,CH2N),4.22(q,J=7.14Hz,2H,OCH2),3.98(t,J=7.08Hz,2H,OCH2),3.82(s,3H,OCH3),1.20(t,J=7.08Hz,3H,OCH2CH3),1.15(t,J=7.11Hz,3H,CH3)161.42,159.99,149.70,147.43,145.72,131.52,130.83,118.69,117.12,114.13,65.45,60.52,55.56,48.81,14.63,13.42

Continued.

Compd.1HNMR(DMSO-d6,300MHz),δ13CNMR(DMSO-d6,75MHz),δ6g7.61—7.26(m,4H,ClPh),4.32(q,J=7.17Hz,2H,OCH2),4.16(q,J=7.14Hz,2H,OCH2),4.02(t,J=7.41Hz,2H,CH2N),1.85—1.80(m,2H,CH2),1.39—1.33(m,2H,CH2),1.32(t,J=7.11Hz,3H,OCH2CH3),1.26(t,J=7.14Hz,3H,OCH2CH3),0.95(t,J=7.29Hz,3H,CH3)161.01,150.53,147.53,145.13,137.39,130.67,128.68,123.69,65.55,61.35,47.02,30.01,19.70,14.56,13.54,13.48

1.3抑菌活性測試

1.3.1材料測試對象為化合物5a～5x和6a～6g, 選擇多菌靈原藥作為對照. 供試菌種為番茄晚疫病菌(Phytophthora infestans)、 油菜菌核病菌(Sclerotinia scleotiorum)、 蘋果斑點(diǎn)落葉病病原(Ahernaria mali)、 辣椒疫霉病菌(Phytophora capsici)、 西瓜炭疽病菌(Colletetrichum orbiculare)和辣椒灰霉病菌(Botrytis cinerea), 均由中國農(nóng)業(yè)科學(xué)院植物保護(hù)研究所提供; 實(shí)驗(yàn)用培養(yǎng)基均為馬鈴薯瓊脂培養(yǎng)基(PDA).

1.3.2實(shí)驗(yàn)方法將目標(biāo)化合物用二甲亞砜溶解配制成20000mg/L的高濃度母液. 按照一定的濃度梯度, 將測試藥劑加入經(jīng)滅菌并冷卻至約55 ℃的培養(yǎng)基(PDA)中混勻, 倒入培養(yǎng)皿中, 制成含藥濃度為50mg/L的平板. 實(shí)驗(yàn)設(shè)不含藥劑處理的空白對照, 各處理重復(fù)3次.以百菌清及多菌靈作為對照藥劑, 采用菌落直徑法進(jìn)行抑菌活性實(shí)驗(yàn).

在含藥培養(yǎng)基平板中心分別接一供試病菌的新鮮菌絲塊菌碟, 菌絲朝下. 在25 ℃恒溫培養(yǎng)箱中, 培養(yǎng)至空白對照菌落布滿培養(yǎng)皿2/3以上時(shí),用十字交叉法測量處理的菌落直徑.重復(fù)3次, 以其平均數(shù)代表菌落的大小.計(jì)算藥劑對菌絲生長的抑制率.

藥劑處理對各種病原菌的菌絲生長抑制率公式:

菌絲生長抑制率(%)=(空白菌落直徑-藥劑處理菌落直徑)/(空白菌落直徑-菌碟直徑)×100%

1.4殺蟲活性測試

實(shí)驗(yàn)害蟲為桃蚜[Myzus persicae(Sulzer)], 采自田間的種群; 對照藥劑為吡蟲啉.毒力測定方法如下: 先將原藥用N,N-二甲基甲酰胺配制成母液(質(zhì)量分?jǐn)?shù)2%), 再用TritonX-100的水溶液(質(zhì)量分?jǐn)?shù)0.05%)稀釋至測定濃度. 采用藥液浸漬法, 將事先挑選好的帶蚜葉片浸入藥液中, 輕搖10s后取出, 用吸水紙吸去多余藥液, 計(jì)數(shù)后移入放有濕潤吸水紙保濕的培養(yǎng)皿內(nèi), 加保鮮膜加蓋置(25±1) ℃下恢復(fù). 用不含藥劑溶液作空白對照. 48h后在臺(tái)式放大鏡下檢查結(jié)果. 以毛筆尖輕觸蟲體, 無反應(yīng)和不能正常爬行者為死亡. 所測藥劑濃度梯度設(shè)定為5, 10, 20, 80, 200和400mg/L, 對照藥劑吡蟲啉的濃度梯度設(shè)定為40, 20, 10, 2, 1, 0.5和0.2mg/L, 每個(gè)梯度平行測定3次. 實(shí)驗(yàn)結(jié)果用Probit軟件進(jìn)行統(tǒng)計(jì)分析[20], 計(jì)算半致死濃度(LC50).

2結(jié)果與討論

2.1目標(biāo)化合物的合成

以氯甲酸乙酯為原料合成氨基甲酸酯多采用弱堿三乙胺、 吡啶、 碳酸鉀和碳酸鈉等作為縛酸劑, 但在合成化合物5時(shí), 室溫下用弱堿作縛酸劑反應(yīng)并不能進(jìn)行. 改用NaOH作縛酸劑后, 以丙酮與水為溶劑, 在室溫下反應(yīng)能較好地進(jìn)行, 但產(chǎn)率通常約為50%, 有近1/2的原料未反應(yīng), 延長反應(yīng)時(shí)間并不能提高反應(yīng)收率.由于本實(shí)驗(yàn)以得到產(chǎn)物為目標(biāo), 并且未產(chǎn)生副產(chǎn)物, 故未優(yōu)化反應(yīng)條件.

但對于某些底物, 在相同條件下得到的主要產(chǎn)物為化合物6, 在此情況下化合物5的含量非常少. 進(jìn)一步研究發(fā)現(xiàn), 化合物6在酸性條件下容易脫掉4-位的乙氧羰基回到化合物5, 即使在很弱的酸性條件下也容易發(fā)生分解. 考慮到化合物6具有與苯菌靈類似的結(jié)構(gòu), 故合成了部分化合物6, 并將其活性與化合物5進(jìn)行了比較.

2.2殺蟲活性

采用浸漬法測定了目標(biāo)化合物在500μg/mL下對桃蚜的校正致死率, 結(jié)果列于表5.可見, 在此濃度下, 大部分目標(biāo)化合物表現(xiàn)出良好的殺蟲活性. 基于此, 選擇致死率>90%的化合物進(jìn)一步測定了其精密毒力, 結(jié)果列于表6. 分析發(fā)現(xiàn), 當(dāng)R2基團(tuán)為2-氯吡啶-5-甲基時(shí)(化合物5a和5b), 活性高于R2為脂肪基團(tuán)取代的化合物, 其中化合物5b對桃蚜的LC50值為9.49μg/mL, 遠(yuǎn)高于其它化合物; 當(dāng)R1同為芳基時(shí),R2為烯丙基時(shí)(化合物5u和5x)的殺蟲活性高于R2為乙基、 正丙基及正丁基取代的化合物(5f, 5j, 5w和5q～5u); 當(dāng)R1同為芳基取代時(shí), 雙氨基甲酸酯類化合物6的殺蟲活性總體高于單氨基甲酸酯類化合物5, 但化合物5x例外.

Table 5　Corrected mortality of synthesized compounds to Myzus perscicae Sulzer at 500 μg/mL

Table 6　Precision insecticidal activity of selected compounds against Myzus perscicae Sulzer(48 h, LC50)

2.3抑菌活性

采用菌絲生長速率法測定了50μg/mL濃度下目標(biāo)化合物5和6的離體抑菌活性, 結(jié)果列于表7. 可見, 對于化合物5i～5x和5a～5h, 當(dāng)R1為芳環(huán)時(shí), 苯環(huán)上有吸電子取代時(shí)抑菌活性高于苯環(huán)上有給電子基團(tuán)或無取代基的化合物;R1基團(tuán)苯環(huán)上為4-Cl取代時(shí)(化合物5n～5p), 對多數(shù)供試菌種的抑菌活性高于R1基團(tuán)苯環(huán)上有2-Cl,F及NO2取代的化合物5i～5k, 5q～5x, 但當(dāng)R1基團(tuán)苯環(huán)上為2-Cl取代時(shí)(化合物5i～5k), 對西瓜炭疽病菌的抑制率明顯高于其它目標(biāo)化合物; 化合物5r對蘋果斑點(diǎn)落葉病菌的抑制率為74.7%, 高于對照藥劑多菌靈(49.5%); 與化合物5相比, 雙氨基甲酸酯類化合物6的抑菌活性較差, 但當(dāng)R1基團(tuán)苯環(huán)上有4-Cl取代時(shí)(化合物6g), 對大多供試菌種的抑菌活性高于其它目標(biāo)化合物.

Table 7　Fungicidal activity of target compounds at 50 μg/mL in vitro inhibitory rate(%)

Continued.

Compd.P.infestansS.scleotiorumA.maliP.capsiciC.orbiculareB.cinereaClgPa5k2.98.635.05.841.62.54.555lNANA3.9NA2.1NA3.515m20.90.421.7NA13.5NA4.425n28.130.325.59.814.10.34.205o36.438.531.5NA16.226.64.685p33.023.233.5NA16.218.84.555q19.711.123.87.212.59.7/5r20.227.674.72.111.214.3/5s22.421.322.35.37.213.4/5t8.212.020.24.912.113.03.805u6.720.424.7NA5.89.24.285v9.415.920.55.97.510.84.155w24.024.029.52.5NA7.94.705x23.119.522.91.7NA1.2/6a19.224.129.4NA9.9NA4.656b14.39.16.54.82.1NA4.306c8.65.513.11.9NANA3.626d6.63.111.9NANANA3.976e7.413.311.0NA4.8NA4.106f7.76.62.7NA1.8NA3.976g46.452.046.018.824.936.65.20Carbendazol10010049.533.874.176.11.29Benomyl2.38

a:lgPmeansoctanol-waterpartitioncoefficient,whichisequaltothelogarithmoftheratioofconcentrationsofanunionizedcompoundbetweenoctanolandwater. ClgPisacalculatedlgPvalueinsilicomethod. “/”meansthattheClgPofcompoundcannotbecalculatedinthesamesilicomethod.NA:noactivity. ---:notested.

總之, 該類化合物的抑菌活性不佳, 盡管具有與多菌靈(Carbendazim)和苯菌靈(Benomyl)類似的結(jié)構(gòu). 但比較ClgP值可知, 目標(biāo)化合物的脂溶性遠(yuǎn)高于多菌靈和苯菌靈(表7), 甚至高于其未取代的母體化合物4, 其水溶性差可能是造成抑菌活性差的主要原因, 這也為進(jìn)一步提高其活性提供了新思路.

3結(jié)論

采用活性基團(tuán)拼接的方法, 在1H-1,2,4-三唑-5-胺上引入氨基甲酸酯單元, 合成了一系列新的雜芳基氨基甲酸酯類化合物, 其對桃蚜表現(xiàn)出較高的殺蟲活性, 其中化合物5b的LC50值為9.49μg/mL, 稍遜于對照藥吡蟲啉, 但仍具有進(jìn)一步研究開發(fā)或作為先導(dǎo)化合物研究的價(jià)值. 該類化合物的抑菌活性不強(qiáng), 僅有個(gè)別化合物對某種病原菌表現(xiàn)出較好的活性. 雖然所合成化合物的總體生物活性不夠理想, 但是對此類結(jié)構(gòu)新穎的多取代1H-1,2,4-三唑5-氨基甲酸酯類化合物的活性研究為今后開發(fā)高活性的三唑類化合物提供了新思路.

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(Ed.:P,H,Y,K)

?SupportedbytheNationalNaturalScienceFoundationofChina(No.31272076).

doi:10.7503/cjcu20160065

收稿日期:2016-01-26. 網(wǎng)絡(luò)出版日期: 2016-04-18.

基金項(xiàng)目:國家自然科學(xué)基金(批準(zhǔn)號(hào): 31272076)資助.

中圖分類號(hào)O626

文獻(xiàn)標(biāo)志碼A

Synthesis,StructuralCharacterization,InsecticidalandFungicidalActivityof(1H-1,2,4-Triazol-5-yl)carbamates?

JIAChangqing1,YANGDongyan1,CHEChuanliang1,MAYongqiang1,RUIChanghui2,YANXiaojing2,QINZhaohai1*

(1. College of Science, China Agricultural University, Beijing 100193, China;2. Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

AbstractA series of novel (1H-1,2,4-triazol-5-yl)carbamates(5 and 6) was synthesized via the method of combining the crucial sub-structures of carbamates and 1H-1,2,4-triazole-5-amines in one molecules. Their structures were characterized by nuclear magnetic resonance(NMR), infrared(IR) spectrometry, high resolution mass spectrometry(HRMS) and elemental analysis. The preliminary insecticidal activity assays indicated that the lethal rates of target compounds to Myzus persicae were good at the concentration of 500 μg/mL. And the lethal rate of several compounds was more than 90%. Further research of these compounds against Myzus persicae indicated that compound 5b showed considerably high activity with a LC50of 9.49 μg/mL, which confirmed that these compounds are valuable for further study. The preliminary fungicidal activity assays indicated that these compounds exhibited low fungicidal activity against tested fugi in vitro. At a dose of 50 μg/mL, only a few of compounds gave limited inhibition on mycelium growth. In addition, the structure-activity relationship was also discussed.

Keywords1H-1,2,4-triazole-5-amine; Carbamate; Insecticidal activity; Fungicidal activity

聯(lián)系人簡介: 覃兆海, 男, 博士, 教授, 博士生導(dǎo)師, 主要從事新農(nóng)藥創(chuàng)制研究.E-mail:qinzhaohai@263.net