CN108013036B - 一种吡咯-2-羧酸的应用及制备方法 - Google Patents

一种吡咯-2-羧酸的应用及制备方法 Download PDF

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CN108013036B
CN108013036B CN201711316514.8A CN201711316514A CN108013036B CN 108013036 B CN108013036 B CN 108013036B CN 201711316514 A CN201711316514 A CN 201711316514A CN 108013036 B CN108013036 B CN 108013036B
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王立岩
伍嘉慧
李晓帆
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Abstract

本发明提供一种吡咯‑2‑羧酸的应用及制备方法,涉及化合物制备技术领域。其中,吡咯‑2‑羧酸应用于抗植物致病真菌。吡咯‑2‑羧酸具有抗植物病菌的活性,可以将其应用于抗植物病菌,从而抑制农作物或生态环境中的植物病菌,进而解决植物病害对农作物和生态环境的危害。

Description

一种吡咯-2-羧酸的应用及制备方法
技术领域
本发明属于化合物制备技术领域,尤其涉及一种吡咯-2-羧酸的应用及制备 方法。
背景技术
植物治病真菌是指可以寄生在职务上并引起植物病害的真菌,是植物病害 重要的侵染源。通常,一种作物上可以发现几种甚至几十种真菌病害,严重的 迫害了生态环境,对农作物的生产造成了经济损失。
发明内容
本发明提供一种吡咯-2-羧酸的应用及制备方法,旨在解决植物真菌对农作 物引起病害的问题。
本发明提供一种吡咯-2-羧酸的应用,将吡咯-2-羧酸应用于抗植物致病真 菌。
本发明提供一种吡咯-2-羧酸的制备方法,包括:
将黄杆菌(Arenibacter sp.6A1)接种到培养基中,并在温度为26~28℃, 摇床转速为160~200rpm的条件下发酵培养至少96h,得到发酵液;
利用乙酸乙酯对发酵液进行萃取,分离,得到吡咯-2-羧酸。
本发明提供一种吡咯-2-羧酸的应用及制备方法,吡咯-2-羧酸具有抗植物病 菌的活性,可以将其应用于抗植物病菌,从而抑制农作物或生态环境中的植物 病菌,进而解决植物病害对农作物和生态环境的危害。
具体实施方式
为使得本发明的发明目的、特征、优点能够更加的明显和易懂,下面将对 本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅 仅是本发明一部分实施例,而非全部实施例。基于本发明中的实施例,本领域 技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发 明保护的范围。
本发明提供一种吡咯-2-羧酸的应用,即将吡咯-2-羧酸应用于抗植物致病真 菌。
该植物致病真菌为苹果腐烂菌或小麦赤霉菌。
本发明提供一种吡咯-2-羧酸的应用及制备方法,吡咯-2-羧酸具有抗植物病 菌的活性,可以将其应用于抗植物病菌,从而抑制农作物或生态环境中的植物 病菌,进而解决植物病害对农作物和生态环境的危害。
本发明还提供一种吡咯-2-羧酸的制备方法,主要包括以下步骤:
步骤一、将黄杆菌接种到培养基中,并在温度为26~28℃,摇床转速为 160~200rpm的条件下培养发酵至少96h,得到发酵液;
黄杆菌Arenibacter sp.6A1,已于2017年5月15日保藏于中国典型培养物 保藏中心(China Center for Type Culture Collection,简称:CCTCC,地址湖北 省武汉市武昌区八一路珞珈山,保藏编号为M2017262,命名为6A1。
具体地,将接种后的100mL培养基加入到250mL三角瓶中,保持温度为 26~28℃,摇床转速为160~200rpm,发酵至少96h,得到多瓶发酵液。优选地, 发酵时的温度为25℃,摇床转速为180rpm,发酵时间为96h。
具体地,步骤一中,培养基的配方为:蛋白胨5g/L,酵母膏1g/L,磷酸高 铁0.01g/L,海盐20g/L。
步骤二、利用乙酸乙酯对发酵后的培养基进行萃取,分离,得到吡咯-2-羧 酸。
具体地,步骤二中利用等体积的乙酸乙酯对发酵后的培养基进行萃取,将 萃取液在低于50℃的条件下蒸干,得乙酸乙酯层萃取物2.0g。分离的步骤包括:
利用稀盐酸将发酵液的pH值调至3~4,用乙酸乙酯进行萃取,得到萃取物;
其中,乙酸乙酯的体积与发酵液的体积比为1:1。
将萃取物在低于50℃的条件下蒸干,得乙酸乙酯层萃取物;
对乙酸乙酯层萃取物进行层析分离,并对层析分离后的馏份进行反相 HPLC分离纯化,得到吡咯-2-羧酸。
进一步地,将乙酸乙酯层萃取物进行层析分离的方法包括:
将乙酸乙酯层萃取物溶于甲醇中,并利用Sephadex LH20柱进行层析;
用350~450mL洗脱溶剂进行等梯度洗脱,以5~50mL为一个馏份,依次收 集多个馏份,并将最后收集到的馏份作为目标馏份,其中,洗脱剂为甲醇和氯 仿按照1:1混合后的混合液。
在实际应用中,按照乙酸乙酯层萃取物质量的0.5~1.5mL/g量取甲醇来溶 解乙酸乙酯层萃取物。
进一步地,对收集的馏份进行反向HPLC分离纯化的方法为:
将目标馏份浓缩蒸干,溶于甲醇中,进行梯度洗脱;
设检测波长为254nm,于23.05min时收集液相峰,将收集到的馏份进行干 燥,得到吡咯-2-羧酸。
其中,反向HPLC分离纯化时的洗脱条件为:洗脱梯度为MeOH:H2O=0: 100~100:0,洗脱梯度时间为10~50min,流速为0.5~1.5mL/min。优选地,洗 脱梯度为MeOH:H2O=5:95~80:20,洗脱梯度时间为30min,流速为1mL/min。 在实际应用中,洗脱剂的洗脱梯度由层析设备自动进行匹配,其中,洗脱梯度 为一个范围。
实施例
1、菌种发酵:
将低温保藏的黄杆菌CCTCCM2017262接种到发酵培养基中培养96小时。 其中,培养基的摇床转速为180rpm,温度为28℃。培养基为2216E培养基(2216E 培养基的配方为:蛋白胨5g/L,酵母膏1g/L,磷酸高铁0.01g/L,海盐20g/L), 培养基在121℃高压灭菌20分钟。
2、吡咯-2-羧酸的分离:
乙酸乙酯萃取:用1mol/L的盐酸调节发酵后的培养基的PH至3~4,用乙 酸乙酯萃取,萃取液在低于50℃下旋转蒸干,重复三次萃取过程,得到乙酸乙 酯层萃取物2g。
将乙酸乙酯层萃取物溶于2mL甲醇中,进行Sephadex LH20(柱子规格: 直径=3.5cm,柱长=100cm)柱层析,利用400mL体积比为1:1的氯仿和甲醇的 混合液作为洗脱溶剂进行等梯度洗脱,每50mL收集为一个馏份,共得8个馏 份,G3-A、G3-B、G3-C、G3-D、G3-E、G3-F、G3-G和G3-H。
将G3-H馏份浓缩蒸干,溶于1mL甲醇中,用甲醇/水混合溶剂进行梯度洗脱 (洗脱梯度:MeOH:H2O=MeOH:H2O=5:95~80:20,洗脱梯度时间:30min,流 速1mL/min),检测波长254nm,于23.05min时收集液相峰,得目标馏份,干燥, 得到吡咯-2-羧酸(9mg)。(采用的HPLC型号为:安捷伦1260;检测器型号:安 捷伦1260DAD;柱子类别与规格为:YMC-C18,4.6×250mm,5μm)。
3、结果测试
1)实施例1制备得到的白色粉末的核磁共振测试
对实施例1得到的化合物进行核磁共振测试,得到以下数据:
白色粉末,LC-MS m/z 112.3[M+H]+,134.4[M+Na]+1H NMR(600MHz, DMSO-d6)和13C NMR(600MHz,DMSO-d6)。
表1:化合物的NMR数据
(600MHz,DMSO-d6,J in Hz,δin ppm)
Position δ<sub>H</sub>(J in Hz) δ<sub>C</sub>
1 11.69,NH(s)
2 122.9
3 6.71,H(m) 109.3
4 6.12,H(m) 114.6
5 6.95,H(m) 123.4
6 12.15,COOH(s) 161.9
由上述数据分析并与文献比对可知,化合物的结构为:
Figure BDA0001503896350000051
可以确定该化合物为吡咯-2-羧酸。
该文献的具体信息为:Huabao Chen,Chunping Yang,Tao Ke,et. Antimicrobialactivity of secondary metabolites from Streptomyces sp.K15,an endophyte inHouttuynia cordata Thunb[J].Natural Product Research,2015,29(23), 2223-2225.
2)吡咯-2-羧酸抗植物致病真菌测试
用DMSO将吡咯-2-羧酸溶解成50mg/mL。
将11株植物致病真菌在PDA平板(BD Difco,USA)复苏(温度:28℃, 时间3天),戳取菌圈外周直径约8mm大小的菌块到装有1mL PDB培养基 (BD Difco,USA)的24孔板中进行培养。
分别向孔中加入2ul配制的浓度为50mg/mL的样品(终浓度100μg/mL),对 照组加入2μl DMSO,每个实验组和对照组分别设置3个重复实验,将24孔板放 至28℃培养,3天后,观察吡咯-2-羧酸对11株致病真菌的抗菌效果。如下表所 示,表2示出了浓度为100μg/mL的吡咯-2-羧酸对11种植物致病真菌的抑制作 用,其中,吡咯-2-羧酸对苹果腐烂菌和小麦赤霉菌有抑制作用。
表2.吡咯-2-羧酸对植物致病真菌的抑制作用
Figure BDA0001503896350000052
Figure BDA0001503896350000061
+表示有抑菌效果,—表示无抑菌效果
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发 明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明 的保护范围之内。

Claims (6)

1.一种吡咯-2-羧酸的制备方法,其特征在于,所述吡咯-2-羧酸的制备方法包括:
将黄杆菌(Arenibacter sp.6A1)接种到培养基中,并在温度为26~28℃,摇床转速为160~200rpm的条件下发酵培养至少96h,得到发酵液;
利用乙酸乙酯对发酵液进行萃取,分离,得到吡咯-2-羧酸。
2.根据权利要求1所述的方法,其特征在于,所述培养基的配方为:蛋白胨5g/L,酵母膏1g/L,磷酸高铁0.01g/L和海盐20g/L。
3.根据权利要求1所述的方法,其特征在于,萃取的方法包括:
利用稀盐酸将发酵液的pH值调至3~4,用乙酸乙酯进行萃取,得萃取物,其中,乙酸乙酯的体积与发酵液的体积比为1:1;
将萃取物在低于50℃的条件下蒸干,得乙酸乙酯层萃取物;
对乙酸乙酯层萃取物进行层析分离,并对层析分离后的馏份进行反相HPLC分离纯化,得到吡咯-2-羧酸。
4.根据权利要求3所述的方法,其特征在于,对乙酸乙酯层萃取物进行层析分离的方法包括:
将乙酸乙酯层萃取物溶于甲醇中,并利用Sephadex LH20柱进行层析;
用350~450mL洗脱溶剂进行等梯度洗脱,以5~50mL为一个馏份,依次收集多个馏份,并将最后收集到的馏份作为目标馏份,其中,洗脱剂为甲醇和水按照1:1混合后的混合液。
5.根据权利要求3所述的方法,其特征在于,所述对收集的馏份进行反向HPLC分离纯化的方法为:
将目标馏份浓缩蒸干,溶于甲醇中,并进行梯度洗脱;
设检测波长为254nm,于23.05min时收集液相峰,将收集的馏份进行干燥,得到吡咯-2-羧酸。
6.根据权利要求5所述的方法,其特征在于,反向HPLC分离纯化时的洗脱条件为:洗脱梯度为MeOH:H2O=0:100~80:20,洗脱梯度时间为25~35min,流速为0.5~1.5mL/min。
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