CN110105318A - 一种α-吡喃酮类化合物的绿色合成方法 - Google Patents

一种α-吡喃酮类化合物的绿色合成方法 Download PDF

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CN110105318A
CN110105318A CN201910546421.7A CN201910546421A CN110105318A CN 110105318 A CN110105318 A CN 110105318A CN 201910546421 A CN201910546421 A CN 201910546421A CN 110105318 A CN110105318 A CN 110105318A
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饶卫东
周媛媛
凌想想
安镝
陈先枭
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Nanjing Forestry University
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Abstract

本发明提供了一种α‑吡喃酮类化合物的绿色合成方法,以α‑碘代环戊烯酮类化合物为原料,以空气作为氧化剂,在溶剂中进行加热反应,能够高效构建多官能团化的α‑吡喃酮类化合物。整个反应具有操作简便、条件温和、底物官能团兼容性好、杂质少、产物易分离等优点。研发制得的一种α‑吡喃酮类化合物具有潜在的生物活性,可经过后续测试其药物活性,进行药物的筛选。也可以作为一类重要的有机中间体应用于医药、农药等领域。

Description

一种α-吡喃酮类化合物的绿色合成方法
技术领域
本发明属于化学合成技术领域,具体涉及一种α-吡喃酮类化合物的绿色合成方法。
背景技术
α-吡喃酮是一种六元环状不饱和内酯,广泛存在于很多天然产物中,并且在医药、农药、香料、染料等领域具有极其广泛的应用,同时吡喃酮也是有机合成中重要的中间体。决明子内酯是由决明子中提取分离出萘并吡喃酮化合物,具有保肝、降血脂、抗氧化、降血压、预防糖尿病等作用;佛手柑内酯具有治疗白癜风和银屑病的作用;蛇床子素广泛应用医药领域中,具有增强免疫功能、抗心律失常、降血压等功效;杀鼠灵是我国主要使用的香豆素类杀鼠剂之一,具有高效、毒性相对较低,对人畜无害等特点;从锯缘青蟹叶中分离的杂色曲霉Y10菌株的提取物,主要用来治疗一种常见的痴呆症——阿尔茨海默病,对脑乙酰胆碱酯酶具有抑制活性,使大脑中的乙酰胆碱恢复正常水平。
由于α-吡喃酮类衍生物在医药、农药、香料、染料等领域具有极其广泛的应用,因此吸引了许多化学家的关注,发展了各种合成此类化合物的方法。现行的吡喃酮化合物的合成方法有很多,过渡金属催化的环加成和环化反应是α-吡喃酮的的通常方法,但大多数方法具有区域选择性差或反应条件苛刻等缺点((a)Angew.Chem.Int.Ed.2007,46:8250-8253;(b)Chem.Commun.,2000:1987-1988;(c)Org.Lett.2015,17:5706-5709;(d)Adv.Synth.Catal.2017,359:2729-2734;(e)Org.Chem.Front.,2018,5:3574)。本发明使用α-碘代环戊烯酮类化合物原料,以空气作为氧化剂的Baeyer-Villiger类型扩环内酯化的策略,高效构建多官能团化的α-吡喃酮类化合物。
发明内容
本部分的目的在于提供一种α-吡喃酮绿色合成方法。
为实现上述目的,本发明提供了如下技术方案:一种式(1)所示的α-吡喃酮类化合物的绿色合成方法,其特征在于:在空气氛围下,以式(2)所示的α-碘代环戊烯酮类化合物为原料,在溶剂中进行加热反应,薄板层析跟踪反应直至反应完全,得到反应混合物,所述反应混合物经后处理得到式(1)所示α-吡喃酮类化合物;其化学反应式如下所示
其中,R1为C1-C6烷基、环烷基、芳基、萘基、单或多取代芳基;
R2代表一个取代基,选自C1-C10烷基、环烷基、羰基、酯基、苯甲酰基、苯磺酰基、含氮杂环基团中的一种或者几种的组合。
进一步,所述溶剂为N,N-二甲基甲酰胺(DMF),N,N-二甲基乙酰胺(DMA),甲苯,四氢呋喃,乙腈,二甲基亚砜(DMSO)或N-甲基吡咯烷酮(NMP),优选为DMA。
进一步,所述反应温度为50-130℃,反应时间为3-12小时。
进一步,所述空气取自所处环境,不受任何其它因素影响。
进一步,其特征在于,所述反应后处理方法为:反应结束后,将反应混合物用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取,再用饱和氯化钠溶液洗涤有机相,无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析,以石油醚∶乙酸乙酯体积比10∶1-1∶1的混合溶液为洗脱剂进行梯度洗脱,得到式(1)所示α-吡喃酮类化合物。
与现有技术相比,本发明的有益效果主要体现在:
(1)本发明以空气作为氧化剂,无需任何催化剂,只需在溶剂中进行加热就能反应,且杂质较少,处理简单,反应高效。
(2)本发明以α-碘代环戊烯酮类化合物为原料,原料易得,各种官能团耐受性相对较好。
(3)本发明的提供的α-吡喃酮类化合物,可以作为一类重要的有机中间体应用于医药、农药等领域。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合具体实施例对本发明的具体实施方式做详细的说明。
在下面的描述中阐述了很多具体细节以便于充分理解本发明,但是本发明还可以采用其他不同于在此描述的其它方式来实施,本领域技术人员可以在不违背本发明内涵的情况下做类似推广,因此本发明不受下面公开的具体实施例的限制。
实施例1:
反应式为:
取25mL茄形瓶,依次加入2a(89.5mg,0.3mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶5)分离得到产物1a(42mg,0.23mmol),产率为75%。
1H NMR(600MHz,CDCl3):δ7.56-7.55(m,2H),7.47-7.45(m,3H),6.34(s,1H),6.30(s,1H),2.31(s,3H);13C NMR(150MHz,CDCl3):δ163.5,162.2,155.5,135.8,130.6,129.2,126.7,108.2,103.5,20.2;HRMS(ESI)calcd.for C12H11O2[M+H]+:187.0759,found187.0757.
实施例2:
反应式为:
取25mL茄形瓶,依次加入2b(99.8mg,0.3mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶5)分离得到产物1b(45mg,0.21mmol),产率为70%。
1H NMR(600MHz,CDCl3):δ7.49(d,J=8.6Hz,2H),7.42(d,J=8.5Hz,2H),6.30(s,1H),6.25(s,1H),2.31(s,3H);13C NMR(150MHz,CDCl3):δ163.2,162.5,154.2,136.9,134.2,129.4,128.0,108.2,103.1,20.2;HRMS(ESI)calcd.for C12H10O2 35Cl[M+H]+:221.0369,found 221.0371.
实施例3:
反应式为:
取25mL茄形瓶,依次加入2c(94mg,0.2mmol),2ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶3)分离得到产物1c(52mg,0.145mmol),产率为72%。
1H NMR(600MHz,CDCl3):δ7.84-7.82(m,2H),7.71-7.69(m,2H),7.57-7.56(m,2H),7.47-7.45(m,3H),6.39(d,J=0.5Hz,1H),6.31(d,J=1.4Hz,1H),3.80(t,J=6.8Hz,2H),2.63(t,J=7.5Hz,2H),2.16-2.11(m,2H);13C NMR(150MHz,CDCl3):δ168.3,164.0,163.2,155.3,135.7,134.1,132.0,130.7,129.2,126.7,123.3,108.5,103.3,37.0,31.4,25.8;HRMS(ESI)calcd.for C22H17NO4Na[M+Na]+:382.1050,found:382.1053.
实施例4:
反应式为:
取25mL茄形瓶,依次加入2d(115mg,0.3mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶3)分离得到产物1d(62mg,0.228mmol),产率为76%。
1H NMR(600MHz,CDCl3)δ7.56-7.55(m,2H),7.47-7.45(m,3H),6.35(s,1H),6.33(s,1H),4.13(t,J=6.2Hz,2H),2.64(t,J=7.7Hz,2H),2.08-2.03(m,5H);13C NMR(150MHz,CDCl3)δ171.0,164.3,163.3,155.4,135.7,130.7,129.2,126.7,108.6,103.2,63.16,30.78,26.04,20.88;HRMS(ESI)calcd.for C16H16O4Na[M+Na]+:295.0941,found:295.0943.
实施例5:
反应式为:
取25mL茄形瓶,依次加入2e(87mg,0.25mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶4)分离得到产物1e(38mg,0.16mmol),产率为65%。
1H NMR(600MHz,CDCl3):δ7.93-7.91(m,3H),7.56-7.50(m,3H),7.42(dd,J=7.1,1.0Hz,1H),6.31(s,1H),6.21(d,J=0.8Hz,1H),2.34(s,3H);13C NMR(150MHz,CDCl3):δ163.1,161.5,156.9,135.3,133.7,130.0,129.9,128.7,127.0,126.5,125.9,125.3,124.9,112.1,106.8,20.1;HRMS(ESI)calcd.for C16H12O2Na[M+Na]+:259.0730,found:259.0732.
实施例6:
反应式为:
取25mL茄形瓶,依次加入2f(115mg,0.33mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶4)分离得到产物1f(48mg,0.21mmol),产率为64%。
1H NMR(600MHz,CDCl3):δ7.29(t,J=7.4Hz,2H),7.21-7.15(m,3H),5.94(s,1H),5.83(s,1H),2.65(t,J=7.6Hz,2H),2.37(t,J=7.6Hz,2H),2.20(s,3H),1.91-1.86(m,2H);13C NMR(150MHz,CDCl3):δ163.3,161.5,160.0,141.2,128.5,128.4,126.2,109.8,105.5,35.1,34.6,29.6,19.9;HRMS(ESI)calcd.for C15H16O2Na[M+Na]+:251.1045,found:251.1043.
实施例7:
反应式为:
取50mL茄形瓶,依次加入2g(237mg,0.70mmol),7ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶4)分离得到产物1g(83mg,0.37mmol),产率为53%。
1H NMR(600MHz,CDCl3):δ7.41-7.38(m,3H),7.25-7.23(m,2H),6.04(s,1H),2.57(td,J=6.5,0.6Hz,2H),2.20(tt,J=6.1,1.6Hz,2H),1.82-1.78(m,2H),1.64-1.60(m,2H);13C NMR(150MHz,CDCl3):δ162.6,159.9,159.4,136.7,129.0,128.5,127.6,112.1,112.1,27.9,25.0,22.4,21.7;HRMS(ESI)calcd.for C15H14O2Na[M+Na]+:249.0886,found:249.0890.
实施例8:
反应式为:
取25mL茄形瓶,依次加入2h(121mg,0.3mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶5)分离得到产物1h(54mg,0.18mmol),产率为61%。
1H NMR(600MHz,CDCl3):δ7.49(d,J=8.6Hz,2H),7.42(d,J=8.5Hz,2H),6.30(s,1H),6.25(s,1H),2.31(s,3H);13C NMR(150MHz,CDCl3):δ163.2,162.5,154.2,136.9,134.2,129.4,128.0,108.2,103.1,20.2;HRMS(ESI)calcd.for C17H24O4Na[M+Na]+:315.1567,found:315.1569.
实施例9:
反应式为:
取25mL茄形瓶,依次加入2i(174mg,0.3mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶4)分离得到产物1i(84mg,0.18mmol),产率为60%。
1H NMR(600MHz,CDCl3)δ7.40(d,J=8.2Hz,2H),7.30-7.28(m,3H),7.21(d,J=8.2Hz,2H),7.02-7.01(m,2H),5.91(s,1H),5.88(s,1H),3.55(t,J=6.4Hz,2H),2.54(t,J=7.3Hz,2H),2.40(s,3H),2.33(t,J=7.7Hz,2H),1.78-1.74(m,2H),1.54-1.50(m,2H),1.32-1.27(m,6H),0.87(t,J=6.5Hz,3H);13C NMR(150MHz,CDCl3)δ163.4,163.2,160.6,143.6,138.9,134.9,129.4,129.2,128.6,128.1,127.7,110.0,105.9,49.3,35.3,31.5,30.4,28.7,28.0,25.3,22.5,21.5,14.0;HRMS(ESI)calcd.for C27H33NO4SNa[M+Na]+:490.2023,found:490.2025.
实施例10:
反应式为:
取25mL茄形瓶,依次加入2j(178mg,0.3mmol),3ml N,N-二甲基乙酰胺,在空气氛围下搅拌,反应温度为120℃。TLC监控反应,反应结束后,用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取(25mLx2),合并有机相,再用饱和氯化钠溶液洗涤(30mLx3),无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析(洗脱剂:乙酸乙酯/石油醚V/V=1∶2)分离得到产物1j(94mg,0.20mmol),产率为65%。
1H NMR(600MHz,CDCl3)δ7.53-7.44(m,5H),7.19(d,J=8.5Hz,1H),6.71-6.70(m,1H),6.63(s,1H),6.37(s,1H),6.33(s,1H),4.01(t,J=5.6Hz,2H),2.89-2.86(m,2H),2.78(t,J=7.4Hz,2H),2.52-2.48(m,1H),2.41-2.35(m,1H),2.26-1.94(m,8H),1.66-1.41(m,5H),0.9l(s,3H);13C NMR(150MHz,CDCl3)δ220.9,164.8,163.4,156.8,155.4,137.9,135.8,132.3,130.6,129.2,126.7,126.4,114.5,112.2,108.6,103.4,66.3,50.4,48.0,44.0,38.4,35.9,31.6,30.8,29.7,26.7,26.6,25.9,21.6,13.9;HRMS(ESI)calcd.forC32H34O4Na[M+Na]+:505.2349,found:505.2353.
由此可见,本发明所提供的一种以α-碘代环戊烯酮类化合物为原料,以空气作为氧化剂,高效构建多官能团化的α-吡喃酮类化合物的新方法。整个反应具有操作简便、条件温和、底物官能团兼容性好、杂质少、产物易分离等优点。研发制得的一种α-吡喃酮类化合物具有潜在的生物活性,可经过后续测试其药物活性,进行药物的筛选。也可以作为一类重要的有机中间体应用于医药、农药等领域。
应说明的是,以上实施例仅用以说明本发明的技术方案而非限制,尽管参照较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的精神和范围,其均应涵盖在本发明的权利要求范围当中。

Claims (5)

1.一种式(1)所示的α-吡喃酮类化合物的绿色合成方法,其特征在于:在空气氛围下,以式(2)所示的α-碘代环戊烯酮类化合物为原料,在溶剂中进行加热反应,薄板层析跟踪反应直至反应完全,得到反应混合物,所述反应混合物经后处理得到式(1)所示α-吡喃酮类化合物;其化学反应式如下所示:
式(2)或式(1)中,所述R1为C1-C6烷基、环烷基、芳基、萘基、单或多取代芳基;
R2代表一个取代基,选自C1-C10烷基、环烷基、羰基、酯基、苯甲酰基、苯磺酰基、含氮杂环基团中的一种或者几种的组合。
2.如权利要求1所述的绿色合成方法,其特征在于,所述溶剂为N,N-二甲基甲酰胺(DMF),N,N-二甲基乙酰胺(DMA),甲苯,四氢呋喃,乙腈,二甲基亚砜(DMSO)或N-甲基吡咯烷酮(NMP),优选为DMA。
3.如权利要求1所述的绿色合成方法,其特征在于,所述反应温度为50-130℃,反应时间为3-12小时。
4.如权利要求1所述的绿色合成方法,其特征在于,所述空气取自所处环境,不受任何其它因素影响。
5.如权利要求1所述的绿色合成方法,其特征在于,所述反应后处理方法为:反应结束后,将反应混合物用硫代硫酸钠饱和溶液洗涤,乙酸乙酯萃取,再用饱和氯化钠溶液洗涤有机相,无水硫酸镁干燥,过滤并旋转蒸发浓缩滤液得到粗品,硅胶柱层析,以石油醚∶乙酸乙酯体积比10∶1-1∶1的混合溶液为洗脱剂进行梯度洗脱,得到式(1)所示α-吡喃酮类化合物。
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