CN111100092A - 一种硫酰胺导向芳烃碳-氢直接胺化的方法 - Google Patents
一种硫酰胺导向芳烃碳-氢直接胺化的方法 Download PDFInfo
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Abstract
本发明属于有机合成化学的技术领域,公开了一种过渡金属催化弱配位硫酰胺导向以1,4,2‑二恶唑‑5‑酮为氮源对芳烃碳‑氢直接胺化的简洁、高效合成方法。本发明实现的胺化反应中,使用的过渡金属催化剂为相对廉价的金属钴催化剂,反应条件温和,并且底物范围广。该方法适用于硫酰胺化合物的直接胺化反应,在有机合成和药物研发等领域具有很好的应用前景。
Description
技术领域
本发明涉及有机合成化学技术领域,具体涉及一种硫酰胺导向芳烃碳-氢直接胺化的方法。
背景技术
硫酰胺结构是重要的结构单元之一,具有重要的生物活性或者药物活性,用途广泛,尤其是在医药及农药等领域具有重要的应用。另外,硫酰胺也是重要的有机合成砌块,可以用来方便地构建一些杂环化合物。
鉴于硫酰胺类化合物的重要性,通过廉价的金属催化碳-氢活化实现对硫酰胺类化合物的高效、直接地进行结构修饰将是非常有吸引力的合成方法。目前已有的通过碳-氢活化胺化的方法,常常需要含有强配位的氮原子的导向基团,利用其强配位能力进行碳-氢键的活化实现碳-氮键的构建。如何通过相对廉价的金属催化实现弱配位硫酰胺导向芳烃碳-氢直接胺化反应是本发明需要解决的问题。
发明内容
为解决上述问题,本发明提供了一种硫酰胺导向芳烃碳-氢直接胺化的方法。
为实现上述目的,本发明采取的技术方案为:
在Cp*Co(CO)I2催化条件下以1,4,2-二恶唑-5-酮为氮源进行碳-氮直接胺化,制备了系列胺化的硫酰胺类化合物,其反应方程式如下:
R为氢、甲基、氯、溴、甲基、甲氧基、乙基、苯基等。R’为氢、甲基、甲氧基、硝基等;R1、R2为直链烷基、环烷基、苄基。
进一步地,包括如下步骤:
将适量硫酰胺、1,4,2-二恶唑-5-酮、Cp*Co(CO)I2、六氟锑酸银、苯甲酸钠,在氩气保护条件下加入2毫升1,2-二氯乙烷加热搅拌,反应12小时后,冷却至室温,减压蒸除溶剂,柱层析分离,即可得到硫酰胺类目标化合物。
优选地,所述的硫酰胺为对甲苯基硫酰胺、对甲氧基苯基硫酰胺、对氯苯基硫酰胺、对溴苯基硫酰胺、3-甲基苯基硫酰胺;1,4,2-二恶唑-5-酮为3-(对甲苯基)-1,4,2-二恶唑-5-酮、3-(4-甲氧基苯基)-1,4,2-二恶唑-5-酮、3-(4-硝基苯基)-1,4,2-二恶唑-5-酮、3-(间甲苯基)-1,4,2-二恶唑-5-酮、3-(2-萘)-1,4,2-二恶唑-5-酮等。
优选地,所述硫酰胺与1,4,2-二恶唑-5-酮的摩尔比为1:1.2。
优选地,硫酰胺与Cp*Co(CO)I2的摩尔比为100:5。
优选地,所述反应温度为40℃。
本发明公开了一种过渡金属催化弱配位硫酰胺导向以1,4,2-二恶唑-5-酮为氮源对芳烃碳-氢直接胺化的简洁、高效合成方法。本发明实现的胺化反应中,使用的过渡金属催化剂为相对廉价的金属钴催化剂,反应条件温和,并且底物范围广。该方法适用于硫酰胺化合物的胺化反应,在有机合成和药物研发等领域具有很好的应用前景。
具体实施方式
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明,但不以任何形式限制本发明。应当指出的是,对本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进。这些都属于本发明的保护范围。
实施例1
在35mL反应管中,加入相应的苯基硫酰胺(0.2mmol),1,4,2-二恶唑-5-酮(0.24mmol),Cp*Co(CO)I2(0.01mmol),六氟锑酸银(0.04mmol),苯甲酸钠(0.04mmol),氩气保护条件下加入1,2-二氯乙烷2mL,40℃下反应12h,反应结束后冷却至室温,减压蒸除溶剂,硅胶柱层析分离,得到目标化合物1:
化合物1为黄色固体,产率89%。1H NMR(400MHz,Chloroform-d)δ:9.81(s,1H),8.33(d,J=8.0Hz,1H),7.94(d,J=8.0Hz,2H),7.56–7.37(m,4H),7.12(d,J=8.0Hz,1H),3.95(t,J=8.0,4.0Hz,2H),3.53(d,J=8.0Hz,1H),3.34(s,1H),2.07–1.87(m,4H).13C NMR(100MHz,Chloroform-d)δ:193.2,165.1,134.3,133.6,133.4,132.0,129.6,128.8,127.3,124.9,124.1,123.4,54.1,53.1,26.2,24.4.HRMS(ESI):m/z[M+Na]+Calcd forC18H18N2OSNa,333.1032;found,333.1030.。
实施例2
目标化合物2为黄色油状物,产率93%。1H NMR(400MHz,Chloroform-d)δ:9.92(s,1H),8.19(s,1H),7.95(d,J=8.0Hz,2H),7.56-7.47(m,3H),6.99(d,J=7.6,19.6Hz,2H),3.96(s,2H),3.55(s,1H),3.39(s,1H),2.39(s,3H),2.06-1.88(m,4H).13C NMR(100MHz,Chloroform-d)δ:193.4,165.0,140.0,134.3,133.4,131.9,130.7,128.7,127.3,124.8,124.8,123.8,54.1,53.1,26.2,24.4,21.5.HRMS(ESI):m/z[M+Na]+Calcd forC19H20N2OSNa,347.1189;found,333.1174.
实施例3
目标化合物3为黄色油状物,产率88%。1H NMR(400MHz,Chloroform-d)δ:10.08(s,1H),8.26(dd,J=2.4,9.2Hz,1H),7.94(d,J=7.2Hz,2H),7.58-7.48(m,3H),7.10(dd,J=6.4,2.0Hz,1H),6.87-6.82(m,1H),3.98(s,2H),3.55(s,1H),3.37(s,1H),2.08-1.91(m,4H).13C NMR(100MHz,Chloroform-d)δ:192.4,165.1,164.0,161.5,135.8,135.7,134.0,132.2,128.8,128.6,128.6,127.3,126.5,126.4,110.9,110.7,110.4,110.1,54.3,53.3,26.2,24.4.HRMS(ESI):m/z[M+Na]+Calcd for C18H17N2FOSNa,361.1345;found,333.1335.
实施例4
目标化合物4为黄色油状物,产率80%。1H NMR(400MHz,Chloroform-d)δ:9.93(s,1H),8.49(s,1H),7.93(t,J=2.0,3.6Hz,2H),7.58-7.48(m,3H),7.14-7.05(m,2H),3.97(s,2H),3.54(s,1H),3.37(s,1H),2.10-1.91(m,4H).13C NMR(100MHz,Chloroform-d)δ:192.2,165.0,135.4,134.9,133.9,132.2,131.1,128.9,127.4,125.9,124.0,123.1,54.2,53.2,26.3,24.4.HRMS(ESI):m/z[M+Na]+Calcd for C18H17N2ClOSNa,367.0642;found,367.0630。
实施例5
目标化合物5为黄色油状物,产率56%。1H NMR(400MHz,Chloroform-d)δ:9.90(s,1H),8.64(s,1H),7.93(d,J=7.2Hz,2H),7.58-7.48(m,3H),7.28(dd,J=1.3,6.4Hz,2H),7.00(d,J=8.0Hz,2H),3.96(s,2H),3.53(s,1H),3.37(s,1H),2.08-1.89(m,4H).13C NMR(100MHz,Chloroform-d)δ:192.0,165.0,134.9,133.8,132.2,131.4,128.8,127.3,127.0,126.1,125.9,123.4,54.2,53.2,26.2,24.4.HRMS(ESI):m/z[M+H]+Calcd forC18H18N2BrOS,389.0318;found,389.0684。
实施例6
目标化合物6为黄色油状物,产率65%。1H NMR(400MHz,Chloroform-d)δ:9.98(s,1H),8.65(s,1H),7.88(d,J=6.8Hz,2H),7.67(d,J=1.2Hz,2H),7.58-7.35(m,7H),7.20(d,J=8.0Hz,1H),4.00(d,J=6.4Hz,2H),3.61(s,1H),3.46(s,1H),2.08-1.90(m,4H).13CNMR(100MHz,Chloroform-d)δ:193.1,165.1,142.6,140.0,143.3,134.0,132.0,128.8,127.8,127.3,127.2,125.4,122.6,122.0,54.2,53.1,26.2,24.4.HRMS(ESI):m/z[M+H]+Calcd for C24H22N2OS,387.1526;found,387.1515。
实施例7
目标化合物7为黄色油状物,产率75%。1H NMR(400MHz,Chloroform-d)δ:9.56(s,1H),8.16(d,J=8.4Hz,1H),7.93(d,J=7.6Hz,2H),7.54-7.46(m,3H),7.20(d,J=7.6Hz,1H),6.94(s,1H),3.96(s,2H),3.54(s,1H),3.37(s,1H),2.33(s,3H),2.08-1.87(m,4H).13CNMR(100MHz,Chloroform-d)δ:193.3,165.0,134.3,134.1,133.8,131.9,130.6,130.3,128.7,127.2,125.1,123.6,54.0,53.0,26.2,24.4,20.9.HRMS(ESI):m/z[M+H]+Calcd forC19H21N2OS,325.1369;found,325.1360。
实施例8
目标化合物8为黄色油状物,产率50%。1H NMR(400MHz,Chloroform-d)δ:9.87(s,1H),8.88(s,1H),7.99(d,J=7.2Hz,2H),7.86(d,J=8.4Hz,1H),7.74(d,J=8.4Hz,1H),7.61-7.48(m,4H),7.43(t,J=14.8Hz,1H),4.06-3.99(m,2H),3.59(t,J=16.4Hz,1H),3.37-3.33(m,1H),2.12-1.85(m,4H).13C NMR(100MHz,Chloroform-d)δ:193.1,165.2,134.4,133.7,133.3,132.0,130.5,129.7,128.8,128.0,127.6,127.3,125.9,124.2,120.6,54.3,53.2,26.2,24.5.HRMS(ESI):m/z[M+H]+Calcd for C22H21N2OS,361.1369;found,361.1360。
实施例9
目标化合物9为黄色油状物,产率42%。1H NMR(400MHz,Chloroform-d)δ:12.58(s,1H),8.09-8.07(m,2H),7.74(d,J=2Hz,1H),7.56-7.39(m,3H),7.39(s,1H),4.11(t,J=18Hz,2H),4.01(t,J=17.6Hz,2H),2.10(t,J=8.4Hz,2H),2.01(t,J=13.6Hz,3H).13CNMR(100MHz,Chloroform-d)δ:177.2,165.4,141.8,135.0,133.8,132.0,128.7,127.8,108.1,54.1,53.7,26.8,23.5.HRMS(ESI):m/z[M+Na]+Calcd for C16H16N2O2SNa,323.0825;found,323.0814。
实施例10
目标化合物10为无色液体,产率69%。1H NMR(400MHz,Chloroform-d)δ:9.14(s,1H),8.23(d,J=8.4Hz,1H),7.91(d,J=7.2Hz,2H),7.56-7.49(m,3H),7.39(m,1H),7.17(m,1H),7.07(s,1H),4.13(dd,J=18Hz,2H),3.42(t,J=7.2,14.0Hz,2H),1.35-1.32(m,3H),1.10-1.07(m,3H).13C NMR(100MHz,Chloroform-d)δ:196.4,165.0,134.3,134.1,132.6,132.0,129.1,128.8,127.1,124.5,124.3,123.8,48.3,46.1,13.6,11.2.HRMS(ESI):m/z[M+Na]+Calcd for C18H20N2OSNa,335.1189;found,335.1183。
实施例11
目标化合物11为黄色油状物,产率67%。1H NMR(400MHz,Chloroform-d)δ:9.72(s,1H),8.32(d,J=8.0Hz,1H),7.83(d,J=8.0Hz,2H),7.40-7.36(m,1H),7.28(d,J=8.0Hz,2H),7.15-7.11(m,2H),3.95(t,J=8.0,16.0Hz,2H),3.53(d,J=7.6Hz,1H),3.34(s,1H),2.41(s,3H),2.07-1.85(m,4H)ppm.;13C NMR(100MHz,Chloroform-d)δ:193.4,165.1,142.5,133.6,133.5,131.5,129.6,129.5,127.3,124.9,124.1,123.5,54.0,53.0,26.2,24.4,21.5;HRMS(ESI):m/z[M+Na]+Calcd for C19H20N2OSNa,347.1189;found,347.1174。
实施例12
目标化合物12为黄色油状物,产率90%。1H NMR(400MHz,Chloroform-d)δ:9.72(s,1H),8.32(d,J=8.0Hz,1H),7.83(d,J=8.0Hz,2H),7.40-7.36(m,1H),7.28(d,J=8.0Hz,2H),7.15-7.11(m,2H),3.95(t,J=8.0,16.0Hz,2H),3.53(d,J=7.6Hz,1H),3.34(s,1H),2.41(s,3H),2.07-1.85(m,4H)ppm.;13C NMR(100MHz,Chloroform-d)δ:193.4,165.1,142.5,133.6,133.5,131.5,129.6,129.5,127.3,124.9,124.1,123.5,54.0,53.0,26.2,24.4,21.5;HRMS(ESI):m/z[M+Na]+Calcd for C19H20N2OSNa,347.1189;found,347.1174。
实施例13
目标化合物13为黄色固体,产率88%。1H NMR(400MHz,Chloroform-d)δ:10.2(s,1H),8.34(dd,J=2.0Hz,8.8Hz,3H),8.10(t,J=7.2Hz,2H),7.45-7.40(m,1H),7.21-7.15(m,2H),3.98(d,J=6.0Hz,2H),3.36(s,1H),3.34(m,1H),2.07-1.89(m,4H);13C NMR(100MHz,Chloroform-d)δ:192.8,163.0,149.8,139.9,133.2,133.0,129.9,128.5,125.2,124.6,123.9,123.3,54.4,53.3,26.2,24.4;HRMS(ESI):m/z[M+H]+Calcd for C18H18N3O3S,356.1063;found,356.1052。
实施例14
目标化合物14为黄色油状物,产率66%。1H NMR(400MHz,Chloroform-d)δ:8.91(s,1H),8.26(d,J=4.4Hz,1H),7.53(d,J=7.6Hz,1H),7.45-7.40(m,1H),7.21-7.34(m,2H),7.26(t,J=6.0Hz,2H),7.19-7.11(m,2H),3.94(t,J=4.8Hz,2H 1H),3.50(s,1H),3.41(d,J=4.0Hz,1H),2.53(s,3H),2.09-1.91(m,4H);13C NMR(100MHz,Chloroform-d)δ:193.2,167.9,136.7,135.7,134.5,132.9,131.4,130.5,129.4,127.1,126.1,124.9,124.6,123.7,53.8,52.9,26.3,24.5,20.2;HRMS(ESI):m/z[M+Na]+CalcdforC19H20N2OSN a,347.1189;found,347.1178。
实施例15
目标化合物15为黄色油状物,产率93%。1H NMR(400MHz,Chloroform-d)δ:9.96(s,1H),8.48(s,1H),8.38(d,J=8.0Hz,1H),8.01-7.88(m,4H,),7.61-7.54(m,2H),7.44-7.40(m,1H),7.16(dd,J=3.2Hz,5.6Hz,3.98(t,J=5.6Hz,2H),3.56(d,J=6.8Hz,1H),3.39(s,1H),2.06–1.86(m,4H)13C NMR(100MHz,Chloroform-d)δ:193.3,165.2,135.0,133.6,133.5,132.6,131.5,129.7,129.3,128.7,128.2,127.9,127.7,126.78,125.0,124.2,123.6,123.5,54.1,53.1,24.2,24.4;HRMS(ESI):m/z[M+Na]+CalcdforC22H20N2OSNa,383.1189;found,383.1170。
实施例16
目标化合物16为白色固体,产率41%。1H NMR(400MHz,Chloroform-d)δ:9.93(s,1H),8.26(d,J=8.4Hz,1H),7.53(s,1H),7.39--7.35(m,1H,),7.20(d,J=3.2Hz,1H),7.14(d,J=4.0Hz,2H),3.99(t,J=7.2Hz,2H),3.50(t,J=7.2Hz,1H),3.33(d,J=4.4Hz,1H),2.10–1.89(m,4H);13C NMR(100MHz,Chloroform-d)δ:193.1,156.2,147.8,144.8,134.0,132.4,129.4,125.0,124.3,123.3,115.1,112.2,53.7,52.9,26.2,24.5;HRMS(ESI):m/z[M+H]+Calcd for C12H17N2O2S,301.1005;found,301.0999。
以上对本发明的具体实施例进行了描述。需要理解的是,本发明并不局限于上述特定实施方式,本领域技术人员可以在权利要求的范围内做出各种变化或修改,这并不影响本发明的实质内容。在不冲突的情况下,本申请的实施例和实施例中的特征可以任意相互组合。
Claims (6)
2.如权利要求1所述的一种硫酰胺导向芳烃碳-氢直接胺化的方法,其特征在于:包括如下步骤:
将适量硫酰胺、1,4,2-二恶唑-5-酮、Cp*Co(CO)I2(5%)、六氟锑酸银(20%)、苯甲酸钠(20%),在氩气条件下加入2毫升1,2-二氯乙烷加热搅拌,反应12小时后,冷却至室温,减压蒸除溶剂,柱层析分离,即可得到目标化合物。
3.优选地,所述的硫酰胺为对甲苯基硫酰胺、对甲氧基苯基硫酰胺、对氯苯基硫酰胺、对溴苯基硫酰胺、3-甲基苯基硫酰胺;1,4,2-二恶唑-5-酮为3-(对甲苯基)-1,4,2-二恶唑-5-酮、3-(4-甲氧基苯基)-1,4,2-二恶唑-5-酮、3-(4-硝基苯基)-1,4,2-二恶唑-5-酮、3-(间甲苯基)-1,4,2-二恶唑-5-酮等。
4.如权利要求2所述的一种硫酰胺导向芳烃碳-氢直接胺化的方法,其特征在于:所述硫酰胺与1,4,2-二恶唑-5-酮的摩尔比为1:1.2。
5.如权利要求2所述的一种硫酰胺导向芳烃碳-氢直接胺化的方法,其特征在于:硫酰胺与Cp*Co(CO)I2(5%)的摩尔比为100:5。
6.如权利要求2所述的一种硫酰胺导向芳烃碳-氢直接胺化的方法,其特征在于:所述反应温度为40℃。
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