CN107382643B - 一种FeCl3催化的酰胺类化合物合成方法 - Google Patents

一种FeCl3催化的酰胺类化合物合成方法 Download PDF

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CN107382643B
CN107382643B CN201710605812.2A CN201710605812A CN107382643B CN 107382643 B CN107382643 B CN 107382643B CN 201710605812 A CN201710605812 A CN 201710605812A CN 107382643 B CN107382643 B CN 107382643B
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肖军华
毕晓静
李君臣
王红梅
孟凡华
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63975 PLA TROOPS
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Abstract

本发明涉及一种FeCl3催化的酰胺类化合物合成方法。该合成方法采用羧酸和N‑取代甲酰胺在FeCl3催化下合成酰胺类化合物。本发明的合成方法条件温和,反应高效,对不同官能团的底物具有广泛的适用性。本发明高效构建的酰胺类化合物是许多有机分子、药物、蛋白质、生物活性分子的重要骨架,本发明所述的合成方法为这类化合物的合成提供了一个广泛适用的制备方法。

Description

一种FeCl3催化的酰胺类化合物合成方法
技术领域
本发明涉及一种FeCl3催化的酰胺类化合物合成方法。
背景技术
过渡金属催化的有机反应是构建化学键的有效策略。受到早期研究报道及催化剂本身性能的影响,很多反应多局限于使用钌、铑、钯等稀缺且不可再生的过渡金属元素,价格昂贵且毒性较高,并不适合于大规模推广应用。铁(Fe)是地球上储量最为丰富的过渡金属资源,虽然如钌、铑、钯一样都有d轨道电子,其作为催化剂的研究却并不多见。研究表明铁在很多反应中催化效率较低或几乎没有催化活性,但作为一种价格便宜、毒性较低的“绿色”金属催化剂,铁催化剂无疑是过渡金属催化剂中的最优选择。
以N,N-二烷基甲酰胺为胺源制备酰胺类化合物的研究报道中,钯、铜催化剂已有诸多成功先例,但铁催化的该类反应却尚未见报道。文献中钯催化的酰胺化反应,所用底物多为卤代芳烃,毒性大、气味大、价格较贵,在反应过程中需要加入配体及2~3当量的三氯氧磷,且在相对较高的反应温度下进行,从环保和经济性方面都有所欠缺。铜催化的酰胺化反应在一定程度上解决了这些问题,但从催化剂本身来说,铜显然没有铁更环保经济。
文献中的研究
Figure BSA0000148027870000011
综上所述,现有方法在合成酰胺时仍存在一些缺憾,本领域的技术人员一直在研究探索,希望能够找到更为温和的反应条件、更环保的方式高产率得到酰胺类化合物。
发明内容
本发明要解决的技术问题是:提供一种FeCl3催化的,以N-取代甲酰胺为胺源的高效、广泛适用的合成酰胺的新方法。
本发明FeCl3催化的酰胺类化合物的合成方法的反应式如下:
Figure BSA0000148027870000012
式(1)所示的羧酸为苯甲酸、2-氯苯甲酸、2-碘苯甲酸、2-硝基苯甲酸、2-三氟甲基苯甲酸、3-甲基苯甲酸、2-萘甲酸、2-吡啶甲酸、3-呋喃甲酸、3-噻吩甲酸、苯基烯丙酸、月桂酸、2,4-二甲氧基苯甲酸、2,6-二甲氧基苯甲酸或2-硝基-3-甲基苯甲酸;
式(2)所示的N-取代甲酰胺为N,N-二甲基甲酰胺、N,N-二丁基甲酰胺、N-甲酰哌啶或N-甲酰吗啉;TBHP为叔丁基过氧化氢。
其反应步骤如下:将羧酸、N-取代甲酰胺、FeCl3、TBHP、甲苯、吡啶以“一锅法”投料,充入氩气保护,在85℃下搅拌8小时;以气相色谱监测反应进程,待反应完全后,旋转蒸发除溶剂,进行柱色谱分离,得到所需的酰胺类化合物。
所述的羧酸、FeCl3、叔丁基过氧化氢TBHP、吡啶的摩尔比为1;0.1∶3∶5,N-取代甲酰胺的加入量为每0.3mmol羧酸,加入1mL N-取代甲酰胺,甲苯的加入量为每0.3mmol 羧酸,加入1mL甲苯。
本发明提供的合成方法使用FeCl3为催化剂,以羧酸和N-取代甲酰胺为原料合成酰胺,相较于现有技术中的合成方法,所述的合成方法优点如下:
(1)所述方法的底物为廉价易得的羧酸类化合物,性质稳定、毒性小、无难闻气味。
(2)所用催化剂为价格低廉的FeCl3,无其他过渡金属的毒性。
(3)所述合成方法中N-取代甲酰胺既是反应物,也是溶剂,且可以在反应后回收再利用,具有较强的原子经济性。
(4)方法可以获得满意的产率,得到酰胺产物。
本发明高效构建的酰胺键骨架是许多药物、农药、生物活性分子和天然产物的重要骨架,本发明所述方法为这类化合物的合成提供了一个广泛适用的制备方法。
具体实施方式
实施例1
以苯甲酸和DMF为原料合成N,N-二甲基苯甲酰胺:
Figure BSA0000148027870000021
在装有磁子的20mL反应瓶中加入苯甲酸(0.036g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到无色透明液体,产率89%。
1H NMR(300MHz,CDCl3)δ7.39(s,5H),3.10(s,3H),2.96(s,3H);13C NMR(75MHz,CDCl3)δ171.76(s),136.34(s),129.61(s),128.43(s),127.11(s),39.69(s),35.43(s);MS(70eV, EI)m/z(EI)C9H11NO[M]:149.19,51(36),77(100),105(29),148(56),149(5)。
实施例2
以2-氯苯甲酸和DMF为原料合成N,N-二甲基-2-氯苯甲酰胺:
Figure BSA0000148027870000031
在装有磁子的20mL反应瓶中加入2-氯苯甲酸(0.047g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率92%。
1H NMR(300MHz,CDCl3)δ7.35-7.19(m,4H),3.07(s,3H),2.80(s,3H);13C NMR(75MHz,CDCl3)δ168.57(s),136.43(s),130.28(d,J=14.4Hz),129.67(s),127.85(s),127.29(s), 38.18(s),34.76(s);MS(70eV,EI)m/z(EI)C9H10ClNO[M]:183.63,75(100),111(84),139 (59),182(16),184(6)。
实施例3
以2-碘苯甲酸和DMF为原料合成N,N-二甲基-2-碘苯甲酰胺:
Figure BSA0000148027870000032
在装有磁子的20mL反应瓶中加入2-碘苯甲酸(0.074g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到淡黄色固体,产率95%。
1H NMR(300MHz,CDCl3)δ7.81(dd,J=8.0,0.8Hz,1H),7.38(td,J=7.5,1.1Hz,1H), 7.21(dd,J=7.6,1.6Hz,1H),7.09-7.03(m,1H),3.13(s,3H),2.84(s,3H);13C NMR(75MHz, CDCl3)δ170.8,142.9,139.1,130.2,128.5,127.1,92.5,38.5,34.8;MS(70eV,EI)m/z(EI) C9H10INO,[M]:275.09,50(100),76(91),91(14),148(11),231(5),274(20),275(11),276(9).
实施例4
以2-硝基苯甲酸和DMF为原料合成N,N-二甲基-2-硝基苯甲酰胺:
Figure BSA0000148027870000033
在装有磁子的20mL反应瓶中加入2-硝基苯甲酸(0.05g,0.3mmol)、FeCl3(0.0049g, 0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率90%。
1H NMR(300MHz,CDCl3)δ8.20(dd,J=8.3,1.0Hz,1H),7.74-7.69(m,1H),7.59-7.54 (m,1H),7.41(dd,J=7.5,1.3Hz,1H),3.17(s,3H),2.84(s,3H);13C NMR(75MHz,CDCl3)δ 168.13(s),145.15(s),134.71(s),133.39(s),129.86(s),128.25(s),124.85(s),38.38(s),35.05 (s);MS(70eV,EI)m/z(EI)C9H10N2O3[M]:194.19,63(87),78(100),150(75),195(84)。
实施例5
以2-三氟甲基苯甲酸和DMF为原料合成N,N-二甲基-2-三氟甲基苯甲酰胺:
Figure BSA0000148027870000041
在装有磁子的20mL反应瓶中加入2-三氟甲基苯甲酸(0.057g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1 mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率89%。
1H NMR(300MHz,CDCl3)δ7.70(d,J=7.8Hz,1H),7.62(dd,J=5.9,3.4Hz,1H),7.51(t,J=7.7Hz,1H),7.35(d,J=7.5Hz,1H),3.14(s,3H),2.80(s,3H);13C NMR(75MHz,CDCl3)δ169.09(s),135.38(d,J=2.2Hz),132.33(d,J=0.8Hz),129.14(s),127.42(s),126.70 (d,J=4.6Hz),38.95(s),34.93(s);MS(70eV,EI)m/z(EI)C10H10F3NO[M]:217.19,75(33),95 (37),145(63),173(61),216(100),217(14)。
实施例6
以3-甲基苯甲酸和DMF为原料合成N,N-二甲基-3-甲基苯甲酰胺:
Figure BSA0000148027870000042
在装有磁子的20mL反应瓶中加入3-甲基苯甲酸(0.041g,0.3mmol)、FeCl3(0.0049g, 0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率79%。
1H NMR(300MHz,CDCl3)δ7.23(dq,J=13.0,7.4Hz,4H),3.04(d,J=39.5Hz,6H),2.37(s,3H);13C NMR(75MHz,CDCl3)δ171.94(s),138.28(s),136.37(s),130.28(s),128.24(s),127.73(s),124.05(s),39.68(s),35.38(s),21.45(s);MS(70eV,EI)m/z(EI)C10H13NO[M]: 163.22,65(27),91(100),119(33),162(28),163(4)。
实施例7
以2-萘甲酸和DMF为原料合成N,N-二甲基-2-萘甲酰胺:
Figure BSA0000148027870000051
在装有磁子的20mL反应瓶中加入2-萘甲酸(0.052g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率93%。
1H NMR(300MHz,CDCl3)δ7.91(s,1H),7.89-7.83(m,3H),7.52(m,J=8.5,4.1,2.1Hz, 3H),3.16(s,3H),3.03(s,3H);13C NMR(75MHz,CDCl3)δ171.80(s),133.70(d,J=2.2Hz), 132.76(s),128.40(d,J=15.6Hz),127.90(s),127.23-126.60(m),124.52(s),39.81(s),35.57(s); MS(70eV,EI)m/z(EI)C13H13NO[M]:199.25,77(76),127(100),155(10),198(15),199(8)。
实施例8
以2-甲酸吡啶和DMF为原料合成N,N-二甲基-2-甲酰胺基吡啶:
Figure BSA0000148027870000052
在装有磁子的20mL反应瓶中加入2-甲酸吡啶(0.037g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率65%。
1H NMR(300MHz,CDCl3)δ8.59(d,J=4.8Hz,1H),7.79(td,J=7.7,1.7Hz,1H),7.63(d, J=7.8Hz,1H),7.34(ddd,J=7.6,4.9,1.1Hz,1H),3.14(s,3H),3.08(s,3H);13C NMR(75MHz, CDCl3)δ154.62(s),148.37(s),137.20(s),124.51(s),123.73(s),39.17(s),35.88(s);MS(70eV, EI)m/z(EI)C8H10N2O[M]:150.17,79(100),93(94),121(22),150(5)。
实施例9
以3-呋喃甲酸和DMF为原料合成N,N-二甲基-3-甲酰胺基呋喃:
Figure BSA0000148027870000053
在装有磁子的20mL反应瓶中加入3-呋喃甲酸(0.034g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到油状液体,产率80%。
1H NMR(300MHz,CDCl3)d 7.72(dd,J=1.4,0.8Hz,1H),7.41(t,J=1.7Hz,1H),6.61 (dd,J=1.8,0.8Hz,1H),3.11(s,6H);13C NMR(75MHz,CDCl3)d 164.9,143.8,142.8,121.5, 110.6;MS(70eV,EI)m/z(EI)C7H9NO2,[M]:139.06,39(51),42(17),67(24),95(41),110 (45),140(100)。
实施例10
以3-噻吩甲酸和DMF为原料合成N,N-二甲基-3-甲酰胺基噻吩:
Figure BSA0000148027870000061
在装有磁子的20mL反应瓶中加入3-噻吩甲酸(0.038g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到油状液体,产率79%。
1H NMR(300MHz,CDCl3)d 7.52(dd,J=2.9,1.3Hz,1H),7.31(dd,J=5.0,2.9Hz,1H), 7.22(dd,J=5.0,1.3Hz,1H),3.08(s,6H);13C NMR(75MHz,CDCl3)d 166.9,136.8,127.38, 126.5,125.7,39.4,35.6;MS(70eV,EI)m/z(EI)C7H9NOS,[M]:155.04,39(62),111(52),122 (36),156(100)。
实施例11
以苯基烯丙酸和DMF为原料合成N,N-二甲基-苯基烯丙酰胺:
Figure BSA0000148027870000062
在装有磁子的20mL反应瓶中加入苯基烯丙酸(0.044g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到油状液体,产率85%。
1H NMR(300MHz,CDCl3)δ7.67(d,J=15.5Hz,1H),7.56-7.48(m,2H),7.40-7.32(m,3H),6.90(d,J=15.4Hz,1H),3.11(d,J=30.4Hz,6H);13C NMR(75MHz,CDCl3)δ166.7,142.3,135.4,129.5,128.8,127.8,117.5,37.4,35.9;MS(70eV,EI)m/z(EI)C11H13NO,[M]:175.23,51(59),77(100),103(62),131(6),175(2)。
实施例12
以月桂酸和DMF为原料合成N,N-二甲基月桂酸酰胺:
Figure BSA0000148027870000071
在装有磁子的20mL反应瓶中加入月桂酸(0.06g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1mL)、吡啶 (0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到油状液体,产率95%。
1H NMR(300MHz,CDCl3)δ2.96(d,J=19.0Hz,6H),2.32-2.26(m,2H),1.62(dd,J=14.6,7.4Hz,2H),1.26(d,J=12.4Hz,16H),0.86(t,J=6.7Hz,3H);13C NMR(75MHz,CDCl3)δ77.5,77.1,76.7,37.4,35.4,33.5,32.0,29.8-29.2(m),25.3,22.7,14.2;MS(70eV,EI)m/z(EI) C14H29NO,[M]:227.39,72(100),87(43),100(14),228(4)。
实施例13
以2,4-二甲氧基苯甲酸和DMF为原料合成N,N-二甲基-2,4-二甲氧基苯甲酰胺:
Figure BSA0000148027870000072
在装有磁子的20mL反应瓶中加入2,4-二甲氧基苯甲酸(0.055g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1 mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率96%。
1H NMR(300MHz,CDCl3)δ7.14(d,J=8.3Hz,1H),6.50-6.41(m,2H),3.78(s,6H),3.06(s,3H),2.82(s,3H);13C NMR(75MHz,CDCl3)δ169.44(s),161.61(s),156.78(s),129.06 (s),119.12(s),104.80(s),55.54(d,J=7.8Hz),38.41(s),34.90(s);MS(70eV,EI)m/z(EI) C11H15NO3,[M]:209.24,51(70),77(100),107(51),165(97),209(10)。
实施例14
以2,6-二甲氧基苯甲酸和DMF为原料合成N,N-二甲基-2,6-二甲氧基苯甲酰胺:
Figure BSA0000148027870000073
在装有磁子的20mL反应瓶中加入2,6-二甲氧基苯甲酸(0.055g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1 mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率52%。
1H NMR(300MHz,CDCl3)δ7.19(t,J=8.4Hz,1H),6.49(d,J=8.4Hz,2H),3.74(s,6H), 3.06(s,3H),2.77(s,3H);13C NMR(75MHz,CDCl3)δ167.3,156.6,130.2,115.1,104.0,56.0, 37.8,34.5);MS(70eV,EI)m/z(EI)C11H15NO3,[M]:209.24,63(53),77(87),107(100),122 (38),150(23),165(43),210(5)。
实施例15
以2-硝基-3-甲基苯甲酸和DMF为原料合成N,N-二甲基-2-硝基-3-甲基苯甲酰胺:
Figure BSA0000148027870000081
在装有磁子的20mL反应瓶中加入2-硝基-3-甲基苯甲酸(0.054g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),DMF(1mL),甲苯(1 mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率93%。
1H NMR(300MHz,CDCl3)δ7.45(t,J=7.6Hz,1H),7.34(d,J=7.7Hz,1H),7.21(d,J=6.7 Hz,1H),3.10(s,3H),2.94(s,3H),2.47(s,3H).13C NMR(75MHz,CDCl3)δ162.07(s),145.73 (s),135.93(s),134.96(s),127.02(s),124.36(s),122.08(s),34.18(s),17.62(s)。
实施例16
以苯甲酸和N,N-二丁基甲酰胺为原料合成N,N-二丁基苯甲酰胺:
Figure BSA0000148027870000082
在装有磁子的20mL反应瓶中加入苯甲酸(0.036g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),N,N-二丁基甲酰胺(1mL),甲苯(1 mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到白色固体,产率93%。
1H NMR(300MHz,CDCl3)δ7.41-7.31(m,5H),3.33(dt,J=92.1,7.4Hz,4H),1.67-1.19 (m,8H),0.99-0.76(m,6H);13C NMR(75MHz,CDCl3)δ171.8,137.4,129.1,128.4,126.5,48.8, 44.5,30.9,29.7,20.1(d,J=44.2Hz),14.1,13.7;MS(70eV,EI)m/z(EI)C15H23NO,[M]:233.35, 51(45),77(100),105(46),234(7)。
实施例17
以苯甲酸和N-甲酰哌啶为原料合成苯甲酰哌啶:
Figure BSA0000148027870000091
在装有磁子的20mL反应瓶中加入苯甲酸(0.036g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),N-甲酰哌啶(1mL),甲苯(1mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到油状液体,产率52%。
1H NMR(300MHz,CDCl3)δ7.38(s,5H),3.52(d,J=114.0Hz,4H),1.71-1.44(m,6H);13C NMR(75MHz,CDCl3)δ170.5,136.5,133.2,130.1,129.5,128.5,126.9,48.9,43.2,26.6, 25.7,24.7;MS(70eV,EI)m/z(EI)C12H15NO,[M]:189.25,51(100),77(88),105(21),190(58)。
实施例18
以苯甲酸和N-甲酰吗啉为原料合成苯甲酰吗啉:
Figure BSA0000148027870000092
在装有磁子的20mL反应瓶中加入苯甲酸(0.036g,0.3mmol)、FeCl3(0.0049g,0.03mmol)、TBHP(0.116g,0.9mmol,70%水溶液),N-甲酰吗啉(1mL),甲苯(1mL)、吡啶(0.118g,1.5mmol),向其中充入氩气,拧紧瓶盖,外温85℃密闭反应8h;气相色谱监测;反应完成后,旋转蒸发除溶剂,经柱层析(乙酸乙酯∶石油醚=4∶1)分离后得到油状液体,产率65%。
1H NMR(300MHz,CDCl3)δ7.46-7.36(m,5H),3.89-3.41(m,8H);13C NMR(75MHz,CDCl3)δ170.5,135.4,130.0,128.7,127.2,67.0;MS(70eV,EI)m/z(EI)C11H13NO2,[M]:191.23,51(100),77(76),148(6),190(17),191(4)。

Claims (1)

1.一种FeCl3催化的酰胺类化合物合成方法,其特征是所述合成方法的反应式如下:
Figure FSB0000189226470000011
式(1)所示的羧酸为苯甲酸、2-氯苯甲酸、2-碘苯甲酸、2-硝基苯甲酸、2-三氟甲基苯甲酸、3-甲基苯甲酸、2-萘甲酸、2-吡啶甲酸、3-呋喃甲酸、3-噻吩甲酸、月桂酸、2,4-二甲氧基苯甲酸、2,6-二甲氧基苯甲酸或2-硝基-3-甲基苯甲酸;
式(2)所示的N-取代甲酰胺为N,N-二甲基甲酰胺、N,N-二丁基甲酰胺、N-甲酰哌啶或N-甲酰吗啉;TBHP为叔丁基过氧化氢;
合成方法反应步骤如下:将羧酸、N-取代甲酰胺、FeCl3、叔丁基过氧化氢TBHP、甲苯、吡啶以“一锅法”投料,充入氩气保护,在85℃下搅拌8小时;以气相色谱监测反应进程,待反应完全后,旋转蒸发除溶剂,进行柱色谱分离,得到所需的酰胺类化合物;
所述的羧酸、 FeCl3 、叔丁基过氧化氢TBHP、吡啶的摩尔比为1∶0.1∶3∶5;N-取代甲酰胺的加入量为每0.3mmol羧酸,加入1mL N-取代甲酰胺;甲苯的加入量为每0.3mmol羧酸,加入1mL甲苯。
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Synthesis of 2-pyrolyl-2-hydroxy-2-cyanoacetamide through FeCl3–TBHP mediated hydroxylation of captodative stabilized radical intermediate;Subhendu Maity 等;《Tetrahedron Letters》;20140823;5676–5679 *

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