CN111620792B - 一种n,n-二取代氰基甲酰胺的合成方法 - Google Patents
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Abstract
本发明内容为一种N,N‑二取代氰基甲酰胺的合成方法,其反应通式如下:
Description
技术领域
本发明属于有机合成技术领域,具体涉及一种N,N-二取代氰基甲酰胺的合成方法。
背景技术
氰基甲酰胺因其良好的生物活性以及化学合成中作为众多药物、材料的关键结构而被广泛关注。从自然界中提取分离出的氰基甲酰胺天然产物有很多,1996年Fusetani和他的同事从海绵Pseudoceratinapurpurea中分离出来ceratinamine是第一个被报道的相关天然产物,由它具有细胞毒性和有效的防污活性,而后从海绵Aplysinellasp也分离出了一种氰基甲酰胺化合物--7-hydroxyceratinamine,农药降解代谢产物--N,N-二甲基氰基甲酰胺也在西红柿、橙子、苹果等蔬菜水果中分离出来;在有机合成中,氰基甲酰胺被广泛应用于合成氮杂环如四唑、吲哚啉,丙烯腈,对称/不对称取代脲和内酰胺,也可以作为异氰酸酯以及氰化氢的稳定来源。
在之前的报到中,关于氰基甲酰胺的制备报道较少,只要是使用胺与羰基氰、isonitroso Meldrum’s Acid、双(三氯甲基)碳酸酯等试剂反应制备(Tetrahedron,2007,63,2978.;Heterocycles,1997,46,503.;Tetrahedron Lett.,2001,42,8197.;Org.Lett.,2015,17,809.),这些反应有很多缺点,比如所使用的试剂具有毒性、关键底物制备的复杂、反应条件复杂操作繁琐、使用的原料活泼易变值以及价格昂贵;缺点限制了这些方法的实用性。本发明创新性地提出使用原料低毒、易制备的N,N-二取代胺基丙二腈与碱在有机溶剂中,温和反应制备多取代氰基甲酰胺,本方法较以往制备方法更加温和、便捷和安全,具有和好的实用价值以及实际的经济效益。
发明内容
本发明的目的在于提供一种反应过程快捷、起始原料简单易得,收率良好,操作安全方便的N,N-二取代氰基甲酰胺的合成方法,以替代以往繁琐危险的制备方法。
本发明的技术方案为:一种N,N-二取代氰基甲酰胺的合成方法,其特征为N,N-二取代胺基丙二腈,碱,依次加入溶剂中,加热条件下得到N,N-二取代的氰基甲酰胺,反应式如下:
其中:
(1)R1、R2不在同一个环系上时,R1、R2为相同的基团,选自甲基、乙基、丙基、丁基;
(2)R1、R2不在同一个环系上时,R1、R2为不相同的基团,R1选自甲基、乙基、丙基、丁基基团;R2选自苯基、取代苯基、苄基、取代苄基基团;
(3)R1、R2在同一个环系上时,R1、R2连同N原子选自二氢吲哚基、1,2,3,4-四氢异喹啉基、哌啶基、2-甲基哌啶基、3-甲基哌啶基、4-甲基哌啶基、吗啉基、2,6-二甲基吗啉基;
(4)碱选自氟化铯、碳酸铯、醋酸铯、氢氧化钠、氢氧化钾、氢氧化钙、碳酸钠、碳酸钾、碳酸钙、氨水、吡啶、三乙胺、1,8-二氮杂二环十一碳-7-烯中的一种或者几种;
(5)反应溶剂选自:乙腈、1,4-二氧六环、二甲基亚砜、N,N-二甲基甲酰胺、四氢呋喃、1,2-二氯乙烷、二氯甲烷、正庚烷、正己烷、甲苯、环己烷的一种或者几种;
(6)反应温度为20-120℃,反应的持续时间为0.5-36小时;
(7)各种反应物的物质的量比值为:N,N-二取代胺基丙二腈:碱:溶剂=1:0.5-10:0.5-100。
具体实施方式
以下通过具体实施例对本发明做进一步的说明,但不应该将此理解为本发明上述主题的范围仅限于以下的实施例,凡基于本发明上述内容实现的技术均属于本发明的范围。
实施例
1.以N,N-二甲基胺基丙二腈和氟化铯原料(反应式1)
在一个10mL的厚壁反应管中将N,N-二甲基胺基丙二腈(50mg,0.458mmol),氟化铯(34.79mg,0.229mmol),依次加入到搅拌的二氯甲烷(0.5mL)中,在25℃下加冷凝管回流反应0.5小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得淡黄色液体(24mg,55%)。
产物检测数据如下:
1H NMR(300MHz,CDCl3)δ3.28(s,3H),3.01(s,3H);13C NMR(75MHz,CDCl3)δ144.73,110.45,37.85,34.31;HRMS(ESI)calcd for C4H6N2O[M+H]+:99.0553found 99.0542。
2.以2-(二丁基氨基)丙二腈和碳酸铯为原料(反应式2)
在一个10mL的厚壁反应管中将2-(二丁基氨基)丙二腈(50mg,0.259mmol),碳酸铯(84mg,0.259mmol),依次加入到搅拌的1,4-二氧六环(1mL)中,在35℃下加冷凝管回流反应2小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得淡黄色液体(37.8mg,80%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ3.54(t,J=7.2Hz,2H),3.36(t,J=7.6Hz,2H),1.66-1.59(m,2H),1.57-1.50(m,2H),1.43-1.29(m,4H),0.98(t,J=7.6Hz,3H),0.93(t,J=7.6Hz,3H);13C NMR(100MHz,CDCl3)δ144.74,110.84,48.84,45.06,30.81,29.01,19.99,19.68,13.62,13.56;HRMS(ESI)calcd for C10H18N2O[M+H]+:183.1492found 183.1495。
3.以2-(乙基(苯基)氨基)丙二腈和醋酸铯为原料(反应式3)
在一个10mL的厚壁反应管中将2-(乙基(苯基)氨基)丙二腈(100mg,0.540mmol),醋酸铯(207.2mg,1.080mmol),依次加入到搅拌的乙腈(4mL)中,在45℃下加冷凝管回流反应8小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(78mg,83%)。
产物检测数据如下:
1H NMR(300MHz,CDCl3)δ7.51(m,1H),7.49-7.48(m,1H),7.48-7.38(m,1H),7.33-7.31(m,1H),7.31-7.30(m,1H),3.38-3.34(m,3H);13C NMR(75MHz,CDCl3)δ144.32,139.54,129.94,129.55,126.82,124.77,110.52,36.59;HRMS(ESI)calcd for C9H8N2O[M+Na]+:183.0529found 183.0532;熔程:53.6℃-61.8℃。
4.以2-(苄基(甲基)氨基)丙二腈和1,8-二氮杂二环十一碳-7-烯为原料(反应4)
在一个20mL的厚壁圆底烧瓶中将2-(苄基(甲基)氨基)丙二腈(500mg,2.70mmol),1,8-二氮杂二环十一碳-7-烯(1.413mL,9.45mmol),依次加入到搅拌的正己烷和环己烷(1/1)的混合溶液(10mL)中,在60℃下加冷凝管回流反应12小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(310mg,66%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ7.44-7.39(m,1H),7.38(s,1H),7.37(d,J=1.4Hz,1H),7.37-7.36(m,1H),7.34(s,1H),7.34-7.30(m,1H),7.29-7.26(m,1H),7.25(s,1H),7.25(s,1H),7.24-7.21(m,1H),4.75(s,2H),4.58(s,2H),3.15(s,3H),2.90(s,3H);13C NMR(100MHz,CDCl3)δ128.29,127.46,110.65,110.43,77.32,77.00,76.68,54.45,50.20,35.31,32.0;HRMS(ESI)calcd forC10H10N2O[M+K]+:213.0425found 213.0428;熔程:55.6℃-64.7℃。
5.以2-((4-氯苯基)(甲基)氨基)丙二腈和碳酸钠为原料(反应式5)
在一个50mL的厚壁圆底烧瓶中将2-((4-氯苯基)(甲基)氨基)丙二腈(2g,9.725mmol),碳酸钠(3.243g,43.76mmol),依次加入到搅拌的四氢呋喃(20mL)中,在70℃下加冷凝管回流反应15小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(1.476g,78%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ7.52-7.49(m,2H),7.31-7.28(m,2H),3.37(s,3H);13CNMR(100MHz,CDCl3)δ144.28,138.17,135.77,130.36,129.67,128.33,126.18,110.37,36.73;HRMS(ESI)calcd for C9H7ClN2O[M+H]+:195.0320found 195.0320;熔程:80.9℃-84.0℃。
6.以2-((4-甲氧苯基)(甲基)氨基)丙二腈和碳酸钠和碳酸铯为原料(反应式6)
在一个50mL的厚壁圆底烧瓶中将2-((4-甲氧苯基)(甲基)氨基)丙二腈(1g,4.969mmol),碳酸钠(1.053g,9.939mmol),碳酸铯(3.238g,9.939mmol),依次加入到搅拌的四氢呋喃(20mL)中,在70℃下加冷凝管回流反应20小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(0.756g,80%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ7.23–7.22(m,2H),7.00–6.97(m,2H),3.89–3.79(m,3H),3.60–3.27(m,3H);13C NMR(100MHz,CDCl3)δ160.24,144.74,132.30,128.29,115.12,114.67,110.70,55.45,36.85;HRMS(ESI)calcd for C10H10N2O2[M+H]+:191.0815found191.0811;熔程:58.8–61.4℃。
7.以2-((4-氟苄基)(甲基)氨基)丙二腈和三乙胺、吡啶和氨水为原料(反应式7)
在一个50mL的厚壁圆底烧瓶中将2-((4-氟苄基)(甲基)氨基)丙二腈(1g,4.921mmol),三乙胺(0.684mL,4.921mmol),吡啶(0.396mL,4.921mmol),氨水(0.094mL,2.461mmol),依次加入到搅拌的四氢呋喃、乙腈、N,N-二甲基甲酰胺(20mL)中,在60℃下加冷凝管回流反应24小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(0.605g,64%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ7.26–7.20(m,4H),7.11–7.00(m,4H),4.72(s,2H),4.54(s,2H),3.16(s,3H),2.89(s,3H);13C NMR(100MHz,CDCl3)δ162.75(d,J=246.8Hz),162.58(d,J=246.1Hz),145.05,144.52,130.24(d,J=8.3Hz),131.02(d,J=3.4Hz),129.54(d,J=3Hz),129.41(d,J=8.4Hz),116.26,116.02(d,J=4.6Hz),115.78,110.62,110.38,53.80,49.59,35.30,31.99;HRMS(ESI)calcd for C10H9FN2O[M+H]+:193.0772found193.0773;熔程:62.3–66.6℃。
8.以2-((4-甲氧苄基)(甲基)氨基)丙二腈和氟化铯和氨水为原料(反应式8)。
在一个50mL的厚壁圆底烧瓶中将2-((4-甲氧苄基)(甲基)氨基)丙二腈(1g,4.646mmol),氟化铯(0.706g,4.646mmol),氨水(0.688mL,17.856mmol),依次加入到搅拌的1,2-二氯乙烷、乙腈、正庚烷(2/2/1)(15mL)中,在60℃下加冷凝管回流反应28小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得透明液体(0.531g,56%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ7.21–7.16(m,4H),6.94–6.84(m,4H),4.69(s,2H),4.52(s,2H),3.81(s,3H),3.80(s,3H),3.14(s,3H),2.89(s,3H);13C NMR(100MHz,CDCl3)159.80,159.56,144.90,144.41,130.03,129.66,129.19,128.83,126.11,125.55,114.60,114.40,114.25,114.07,110.75,110.49,55.34,55.10,54.01,49.68,35.28,34.97,31.96,31.62;HRMS(ESI)calcd for C11H12N2O2[M+Na]+:227.0791found 227.0793。
9.以2-(二氢吲哚-1-基)丙二腈和氟化铯和碳酸钾为原料(反应式9)
在一个100mL的厚壁圆底烧瓶中将2-((4-甲氧苄基)(甲基)氨基)丙二腈(5g,0.0273mol),氟化铯(4.146g,0.0273mol),碳酸钾(3.773mg,0.0273mol),依次加入到搅拌的二氯甲烷、1,2-二氯乙烷、乙腈、正庚烷(1/1/1/1)(40mL)中,在60℃下加冷凝管回流反应30小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得透明液体(1.88g,40%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ8.02(d,J=8.2Hz,1H),7.33–7.15(m,3H),4.35(t,J=8Hz,2H),3.29(t,J=8.4Hz,2H);13C NMR(100MHz,CDCl3)δ140.19,132.54,127.86,126.56,125.16,117.59,113.16,110.92,49.07,27.45;HRMS(ESI)calcd for C10H8N2O[M+H]+:173.0709found 173.0710;熔程:100.1–101.8℃。
10.以2-(1,3,4-三氢异喹啉-(1H)-基)丙二腈和氨水为原料(反应式10)
在一个100mL的厚壁圆底烧瓶中将2-(1,3,4-三氢异喹啉-(1H)-基)丙二腈(10g,0.051mol),氨水(10.74mL,0.279mol),依次加入到搅拌的1,2-二氯乙烷(50mL)中,在80℃下加冷凝管回流反应32小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(4.94g,52%)。
产物检测数据如下:
1H NMR(300MHz,CDCl3)δ7.31-7.13(m,4H),4.91(s,1H),4.76(s,1H),4.20(t,J=8Hz,1H),3.86(t,J=8.4Hz,1H),3.23(t,J=8Hz,1H),2.94(t,J=8.4Hz,1H);13C NMR(75MHz,CDCl3)δ151.72,150.45,134.80,133.18,131.16,130.27,128.66,126.64,122.10,119.82,118.98,89.20,79.87;HRMS(ESI)calcd for C11H10N2O[M+Na]+:209.0685found209.0690;熔程:74.3℃-79.6℃。
11.以2-(哌啶-1-基)丙二腈和吡啶为原料(反应式11)
在一个250mL的厚壁圆底烧瓶中将2-(哌啶-1-基)丙二腈(10g,0.067mol),吡啶(43.18mL,0.536mol),依次加入到搅拌的正庚烷(100mL)中,在100℃下加冷凝管回流反应34小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得黄色液体(7.96g,86%)。
产物检测数据如下:
1H NMR(300MHz,CDCl3)δ3.71(t,J=5.0Hz,2H),3.6-3.53(m,2H),1.77-1.54(m,6H);13C NMR(75MHz,CDCl3)δ142.71,110.25,47.83,42.71,25.92,24.64,23.63;HRMS(ESI)calcd for C7H10N2O[M+Na]+:161.0685found 161.0692。
12.以2-(4-甲基哌啶-1-基)丙二腈和吡啶为原料(反应式12)
在一个10mL的厚壁圆底烧瓶中将2-(4-甲基哌啶-1-基)丙二腈(50mg,0.306mmol),吡啶(0.0197mL,2.451mol),依次加入到搅拌的正庚烷(2mL)中,在100℃下加冷凝管回流反应34小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得黄色液体(39.56mg,85%)。
产物检测数据如下:
1H NMR(300MHz,CDCl3)δ4.41–4.33(m,1H),4.20–4.12(m,1H),3.20(td,J=15.9,12.9Hz,1H),2.73(td,J=15.9,12.9Hz,1H),1.84–1.60(m,3H),1.26–1.07(m,2H),0.96(d,J=6.3Hz,3H);13C NMR(75MHz,CDCl3)δ142.93,110.41,47.39,42.30,34.10,32.88,30.62,21.24;HRMS(ESI)calcd for C8H12N2O[M+H]+:153.1022found 153.1025。
13.以2-吗啉代丙二腈和氟化铯为原料(反应式13)
在一个250mL的厚壁反应管中将2-吗啉代丙二腈(5g,0.033mol),氟化铯(50g,0.331mol),依次加入到搅拌的二甲基亚砜(100mL)中,在120℃下加冷凝管回流反应12小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(4.02g,87%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ3.75(s,4H),3.71-3.67(m,2H),3.64-3.61(m,2H);13CNMR(101MHz,CDCl3)δ143.19,109.88,66.40,65.80,46.93,42.47;HRMS(ESI)calcd forC6H8N2O2[M+H]+:141.0659found 141.0661;熔程:54.1℃-60.1℃。
14.以2-(2,6-二甲基吗啉)代丙二腈和氟化铯为原料(反应式14)
在一个10mL的厚壁反应管中将2-(2,6-二甲基吗啉)代丙二腈(100mg,0.288mmol),氟化铯(87.5mg,0.576mmol),依次加入到搅拌的乙腈(2mL)中,在60℃下加冷凝管回流反应小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得白色固体(80.71mg,86%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ4.26(dt,J=13.2,2Hz,1H),4.00(dt,J=13.2,2Hz,1H),3.66–3.49(m,2H),2.97(dd,J=13.2,10.8Hz,1H),2.51(dd,J=13.6,10.8Hz,1H),1.24(d,J=6.4Hz,3H),1.21(d,J=6.4Hz,3H);13C NMR(100MHz,CDCl3)δ143.02,110.06,72.01,71.34,51.96,47.39,18.49,18.38;HRMS(ESI)calcd for C8H12N2O2[M+H]+:169.0972found169.0974;熔程:52.4–58.9℃。
15.以2-(苄基(苯基)氨基)丙二腈和氟化铯为原料(反应式15)
在一个10mL的厚壁反应管中将2-(苄基(苯基)氨基)丙二腈100mg,0.404mmol),氟化铯(122.8mg,0.809mmol),依次加入到搅拌的乙腈(2mL)中,在80℃下加冷凝管回流反应小时完成反应,在旋转蒸发仪上旋干溶剂,经硅胶柱层析得黄色液体(69.74m g,73%)。
产物检测数据如下:
1H NMR(400MHz,CDCl3)δ7.44–7.36(m,3H),7.34–7.25(m,3H),7.20–7.12(m,2H),7.12–7.04(m,2H),4.90(s,2H);13C NMR(100MHz,CDCl3)δ144.71,138.09,134.47,129.87,129.84,129.44,128.92,128.69,128.49,128.29,128.21,127.86,126.32,110.50,52.95;HRMS(ESI)calcd for C15H12N2O[M+H]+:237.1022found 237.1023。
Claims (2)
1.一种N,N-二取代氰基甲酰胺的合成方法,其特征为N,N-二取代氨基丙二腈、碱,依次加入溶剂中,加热条件下得到N,N-二取代氰基甲酰胺,反应式如下:
其中:
(1)R1、R2不在同一个环系上时,R1、R2是相同的基团,选自甲基、乙基、丙基、丁基;
(2)R1、R2不在同一个环系上时,R1、R2是不相同的基团,R1选自甲基、乙基、丙基、丁基基团;R2选自苯基、4-氯苯基、4-甲氧基苯基、苄基、4-甲氧基苯基亚甲基、4-氟基苯基亚甲基;
(3)R1、R2在同一个环系上时,R1、R2连同N原子选自二氢吲哚基、1,2,3,4-四氢异喹啉基、哌啶基、2-甲基哌啶基、3-甲基哌啶基、4-甲基哌啶基、吗啉基、2,6-二甲基吗啉基;
(4)碱选自氟化铯、碳酸铯、醋酸铯、碳酸钠、碳酸钾、氨水、吡啶、三乙胺、1,8-二氮杂二环十一碳-7-烯中的一种或者几种;
(5)反应溶剂选自:乙腈、1,4-二氧六环、二甲基亚砜、N,N-二甲基甲酰胺、四氢呋喃、1,2-二氯乙烷、二氯甲烷、正庚烷、正己烷、甲苯、环己烷的一种或者几种;
(6) 反应温度为20-120℃,反应的持续时间为0.5-36小时。
2.根据权利要求书1所述的N,N-二取代氰基甲酰胺的合成方法,其特征为所选用的各种反应物的物质的量比值为:N,N-二取代胺基丙二腈:碱:溶剂=1:0.5-10:0.5-100。
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