CN109794292A - Z-选择性钌卡宾烯烃复分解催化剂及其制备方法与应用 - Google Patents
Z-选择性钌卡宾烯烃复分解催化剂及其制备方法与应用 Download PDFInfo
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Abstract
本发明公开了Z‑选择性钌卡宾烯烃复分解催化剂及其制备方法与应用,该催化剂用式(I)所示:
Description
技术领域
本发明属金属有机催化剂领域,涉及一种稳定的Z-选择性钌卡宾烯烃复分解催化剂及其制备方法与应用。
背景技术
烯烃复分解反应是构建碳碳键骨架的重要途径之一。常用的烯烃复分解催化剂(如Grubbs一代,Grubbs二代以及Grubbs-Hoveyda二代)在催化开链烯烃的交叉复分解反应和催化形成大环产物的关环烯烃复分解反应中常给出高比例的E-式烯烃产物。而某些重要的天然产物(比如油酸、灵猫酮)和具有抗癌活性的物质中却常常含有Z-式烯烃产物。因此,如何合理设计催化剂的结构并合成相应的催化剂,使其在催化烯烃反应过程中能够高选择性地产生Z-式烯烃是当前烯烃复分解领域中最具有挑战性的热门研究课题,目前已有相关课题组在这一方向上取得了一些进展。例如,Grubbs等人在2011年首次报到了一种具有Z-选择性的钌卡宾烯烃复分解催化剂。(1)这种催化剂含有一个能与钌金属原子进行双配位的不对称的N-杂环卡宾配合物双齿结构的配体。经过一系列的配体筛选和催化性能研究发现这类催化剂可以实现末端烯烃的交叉复分解反应并且表现出优良的Z选择性,并且具有较好的官能团适用性。在2013年,Hoveyda课题组使用1,2-苯二硫酚或2,3-二巯基丁二腈作为双齿配体取代Grubbs-Hoveyda二代催化剂中的两个氯原子时,所得到的新型配合物也能催化张力环的开环移位复分解反应,并表现出一定Z-选择性。(2)为了增强该类催化剂的稳定性和Z-选择性,在2015年,Hoveyda课题组将苯二硫酚配体的邻位的氢换成卤素原子后,得到的新型催化剂在稳定性和催化活性方面都有所提高。(3)与双齿配体不同的是,当以2,4,6-三苯基苯巯基作为单齿配体替换Grubbs-Hoveyda二代催化剂中的一个硫原子时,所得到的配合物在催化端烯自身交叉复分解时也表现出高Z-选择性。(4)
Z-选择性烯烃复分解催化剂的合成与应用研究虽然已经取得了一些成功,但关于此类催化剂的结构设计、合成及其应用还没有普遍的规律可循;同时可获得现有该催化剂种类较少,而且现有的该类催化剂的选择性和稳定性有待进一步提高。
发明内容
本发明的目的是克服现有合成制备技术的不足,提供一种Z-选择性钌卡宾烯烃复分解催化剂。
本发明的第二个目的是提供Z-选择性钌卡宾烯烃复分解催化剂的制备方法。
本发明的第三个目的是提供Z-选择性钌卡宾烯烃复分解催化剂的应用。
本发明的技术方案概述如下:
Z-选择性钌卡宾烯烃复分解催化剂,用式I所示:
其中:Ar为2,4,6-三甲基苯基或2,6-二异丙基苯基;R为氢或苯基。
Z-选择性钌卡宾烯烃复分解催化剂的制备方法,包括如下步骤:
氮气条件保护下,取Hoveyda-Grubbs II催化剂(IIa)与1,2-二酮-3-环丁烯-3,4-二巯基锌(III)或1,2-二酮-3-环丁烯-3,4-二巯基钠(IV)溶于干燥的有机溶剂中,在室温下搅拌反应至结束,抽干有机溶剂,加入二氯甲烷后离心,收集上层清液,干燥得化合物Ia,所述有机溶剂为四氢呋喃、二氯甲烷或甲苯;反应式为:
其中:Ar为2,4,6-三甲基苯基,R为H;
或:
氮气条件保护下,取催化剂(IIb)与1,2-二酮-3-环丁烯-3,4-二巯基锌(III)或1,2-二酮-3-环丁烯-3,4-二巯基钠(IV)溶于干燥的有机溶剂中,室温下搅拌,抽干有机溶剂,加入二氯甲烷后离心,收集上层清液,干燥得化合物Ib,所述有机溶剂为四氢呋喃、二氯甲烷或甲苯;反应式为:
其中:Ar为2,6-二异丙基苯基,R为H;
或:
氮气条件保护下,取催化剂(IIc)与1,2-二酮-3-环丁烯-3,4-二巯基锌(III)或1,2-二酮-3-环丁烯-3,4-二巯基钠(IV)溶于干燥的有机溶剂中,室温下搅拌,抽干有机溶剂,加入二氯甲烷后离心,收集上层清液,干燥得化合物Ic,所述有机溶剂为四氢呋喃、二氯甲烷或甲苯;反应式为:
其中:Ar为2,4,6-三甲基苯基;R为苯基。
上述Z-选择性钌卡宾烯烃复分解催化剂在催化烯烃复分解反应产生Z-式烯烃产物中的应用。
本发明的优点:
本发明的方法步骤简单,室温即可反应,合成催化剂所需反应条件温和,并且能得到特定构型的顺式产物。Z-选择性钌烯烃复分解催化剂能催化烯烃复分解反应产生Z-式烯烃产物。
具体实施方式
下面通过具体实施例对本发明作进一步的说明。
化合物(IIa)(IIb)(IIc)(III)(IV);的来源。
化合物(IIa)(IIb)(IIc)为商品化药品,可购买得到。
化合物(IV)可根据参考文献(5)进行合成,合成简单,此处不再赘述。
化合物(III)的制备:
由化合物(IV)(1.0equiv.),Zn(OAc)2·2H2O(2.0equiv.)和乙二胺(2.2equiv.)在甲醇中室温下搅拌1小时。过滤得到白色固体,固体用甲醇洗涤,固体干燥得到化合物(III)。
实施例1
Z-选择性钌卡宾烯烃复分解催化剂的制备方法,包括如下步骤:
氮气保护下,在50mL圆底烧瓶中,将Hoveyda-Grubbs II催化剂IIa(1.2520g,2mmol)与1,2-二酮-3-环丁烯-3,4-二巯基二锌III(0.6286g,3mmol)溶于25mL干燥的四氢呋喃中,室温下搅拌5h,抽干四氢呋喃,加入二氯甲烷后离心,收集上层清液,干燥得到黄色固体粉末Ia(0.8581g,61.5%)。
经检测,1H NMR(400MHz,CD2Cl2):1H NMR(400MHz,CD2Cl2)δ15.29(s,1H),7.29(dd,J=11.4,4.3Hz,1H),7.06(d,J=8.4Hz,1H),6.93(dd,J=8.1,3.4Hz,1H),6.89(s,1H),6.80(t,J=7.4Hz,1H),6.77(s,1H),6.62(dd,J=7.5,1.4Hz,1H),6.01(s,1H),5.09(dt,J=13.3,6.7Hz,1H),4.03–3.78(m,4H),2.46(s,3H),2.30(s,3H),2.21(d,J=16.0Hz,3H),2.12(s,3H),1.66(d,J=6.7Hz,3H),1.47(d,J=8.7Hz,6H),1.34(d,J=6.6Hz,3H).13C{1H}NMR(100MHz,CD2Cl2):δ223.7,213.5,206.9,189.8,154.3,141.7,138.8,135.7,129.2,127.9,124.3,122.6,120.3,116.0,114.2,112.9,112.4,110.0,84.1,75.3,75.1,71.2,67.8,31.0,25.9,25.6,24.2,21.7,21.6,20.9,20.8,20.7.IR(KBr)ν:3463,3335,3275,2973,2924,1810,1736,1707,1581,1479,1427,1368,1264,1162,1114,1064,1034,945,905,871,854,823,750,715,625,572,527,420cm-1.ESI-MS[M+Na]+calcd forC35H38N2O3Ru1S2:723.1257;found:700.1367.CCDC number:1585252.
结构用Ia所示。
其中:Ar为2,4,6-三甲基苯基,R为H;
有机溶剂还可以选用二氯甲烷或甲苯。
实施例2
Z-选择性钌卡宾烯烃复分解催化剂的制备方法,包括如下步骤:
氮气保护下,在50mL圆底烧瓶中,将催化剂IIb(1.4220g,2mmol)与1,2-二酮-3-环丁烯-3,4-二巯基二锌盐III(0.6286g,3mmol)溶于25mL干燥的四氢呋喃中,室温下搅拌5h,抽干四氢呋喃,加入二氯甲烷后离心,收集上层清液,干燥得到黄色固体粉末,经检测为化合物Ib(0.8687g,55.4%)。
实施例3
Z-选择性钌卡宾烯烃复分解催化剂的制备方法,包括如下步骤:
氮气保护下,在50mL圆底烧瓶中,将催化剂IIc(1.405g,2mmol)与1,2-二酮-3-环丁烯-3,4-二巯基二锌盐III(0.6286g,3mmol)溶于25mL干燥的四氢呋喃中,室温下搅拌5h,抽干四氢呋喃,加入二氯甲烷后离心,收集上层清液,干燥得到黄色固体粉末,经检测为化合物Ic(0.8008g,51.4%)。
催化实验1
催化生成:Z-1,4-丁烯二醇-1-苯甲酸酯
氮气保护下,将21.1mg(0.13mmol)苯甲酸丙烯醇酯和22.9mg(0.26mmol)Z-1,4-丁烯二醇加入反应试管中。向其中加入4.6mg(6.5μmol)催化剂Ia,加入0.2mL的THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(20%乙醚正己烷溶液-40%乙醚正己烷溶液)。
得到黄色油状液体,产率23%,Z/E为96:4。1H NMR(400MHz,CDCl3)δ7.97(d,J=7.2Hz,2H),7.50(t,J=7.4Hz,1H),7.37(t,J=7.7Hz,2H),5.85(dt,J=12.3,6.6Hz,1H),5.69(dt,J=11.1,7.0Hz,1H),4.87(d,J=7.0Hz,2H),4.27(d,J=11.3Hz,2H),1.57(s,1H).
催化实验2
催化生成:Z-7-邻苯二甲酰亚胺基-2-庚烯-1-醇
氮气保护下,将29.8mg(0.13mmol)6-邻苯二甲酰亚胺基-1-己烯和22.9mg(0.26mmol)Z-1,4-丁烯二醇加入反应试管中。向其中加入4.6mg(6.5μmol)催化剂Ia,加入0.2mL的THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(20%乙醚正己烷溶液-40%乙醚正己烷溶液)。
得到黄色油状液体,产率53%,Z/E为97:3。1H NMR(400MHz,CDCl3)δ7.84(dd,J=5.4,3.1Hz,2H),7.71(dd,J=5.4,3.0Hz,2H),5.64(dt,J=13.4,6.8Hz,1H),5.57–5.41(m,1H),4.21(d,J=6.8Hz,2H),3.68(t,J=7.4Hz,2H),2.16(q,J=7.3Hz,2H),1.74(s,1H),1.72–1.64(m,2H),1.45(p,J=7.3Hz,2H).
催化实验3
催化生成:Z-5-(4’-硝基)苯氧基-2-戊烯-1-醇
氮气保护下,将25.1mg(0.13mmol)4-(4’-硝基)苯氧基-1-丁烯和22.9mg(0.26mmol)Z-1,4-丁烯二醇加入反应试管中。向其中加入4.6mg(6.5μmol)催化剂Ia,加入0.2mL的THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(20%乙醚正己烷溶液-40%乙醚正己烷溶液)。
得到黄色油状液体,产率45%,Z/E为97:3。1H NMR(400MHz,CDCl3)δ8.29–8.11(m,2H),7.07–6.85(m,2H),5.83(dt,J=13.2,6.7Hz,1H),5.72–5.58(m,1H),4.26(d,J=6.7Hz,2H),4.09(t,J=6.4Hz,2H),2.64(q,J=6.6Hz,2H),1.72(s,1H).
催化实验4
催化生成:Z-苯甲酸(7-羟基-5-烯)庚酯
氮气保护下,将26.6mg(0.13mmol)苯甲酸(5-烯)己酯和22.9mg(0.26mmol)Z-1,4-丁烯二醇加入反应试管中。向其中加入5.1mg(6.5μmol)催化剂Ib,加入0.2mL THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(20%-40%乙醚正己烷溶液)。
得到黄色油状液体,产率57%,Z/E为98:2。1H NMR(400MHz,CDCl3)δ8.04(d,J=7.7Hz,2H),7.56(t,J=7.1Hz,1H),7.44(t,J=7.3Hz,2H),5.65(dt,J=12.3,7.0Hz,1H),5.54(q,J=8.4,8.0Hz,1H),4.33(t,J=6.2Hz,2H),4.21(d,J=6.3Hz,2H),2.17(q,J=7.1Hz,2H),1.79(p,J=6.6Hz,3H),1.57–1.50(m,2H).13C NMR(100MHz,CDCl3)δ166.69,132.91,132.30,130.34,129.55,129.06,128.36,64.76,58.56,28.22,26.96,25.93.
催化实验5
催化生成:Z-1,10-二邻苯甲酰亚胺基-5-癸烯
氮气保护下,将29.8mg(0.13mmol)1-邻苯二甲酰亚胺基-5-己烯加入反应试管中。向其中加入5.1mg(6.5μmol)催化剂Ib,加入0.2mL的THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(10%-30%乙醚的正己烷溶液)。
得到黄色油状液体,产率38%,Z/E为82:18。1H NMR(400MHz,CDCl3)δ7.76(dd,J=5.4,3.1Hz,4H),7.63(dd,J=5.4,3.0Hz,4H),5.27(dq,J=15.9,6.5,5.1Hz,2H),3.60(td,J=7.3,2.8Hz,4H),1.96(dq,J=21.8,6.7,6.3Hz,4H),1.59(dt,J=15.2,7.6Hz,4H),1.31(p,J=7.6Hz,4H).13C NMR(100MHz,CDCl3)δ168.43,133.82,132.17,130.19,129.64,123.15,37.90,32.05,28.17,26.85.
催化实验6
催化生成:Z-苯甲酸(5-癸烯)-1,10-二酯
氮气保护下,将26.6mg(0.13mmol)苯甲酸-5-己烯脂加入反应试管中。向其中加入5.1mg(6.5μmol)催化剂Ic,加入0.2mL THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(10%-30%乙醚的正己烷溶液)。
得到黄色油状液体,产率47%,Z/E为74:26。1H NMR(400MHz,CDCl3)δ7.97(d,J=7.7Hz,4H),7.47(t,J=7.4Hz,2H),7.36(t,J=7.6Hz,4H),5.48–5.23(m,2H),4.24(t,J=6.5Hz,4H),2.02(dq,J=18.0,6.9Hz,4H),1.70(p,J=9.3,8.0Hz,4H),1.44(p,J=7.5Hz,4H).13C NMR(100MHz,CDCl3)δ166.66,132.82,129.79,129.53,128.32,64.91,32.14,28.22,26.84,26.12.
催化实验7
催化生成:Z-4-(4’-硝基)苯胺基-2-丁烯-1-醇
氮气保护下,将23.2mg(0.13mmol)Z-4-(4’-硝基)苯胺基-2-丁烯-1-醇和22.9mg(0.26mmol)Z-1,4-丁烯二醇加入反应试管中。向其中加入5.1mg(6.5μmol)催化剂Ic,加入0.2mL THF溶液,在55℃下搅拌4h。反应完产物过硅胶柱(20%-40%乙醚的正己烷溶液)。
得到黄色油状液体,产率44%,Z/E为97:3。1H NMR(400MHz,CDCl3)δ8.09(d,J=9.2Hz,2H),6.55(d,J=9.2Hz,2H),5.95–5.77(m,1H),5.77–5.58(m,1H),4.64(s,1H),4.31(d,J=6.7Hz,2H),3.93(t,J=5.6Hz,2H),1.63(s,1H).13C NMR(100MHz,CDCl3)δ152.93,132.41,127.77,126.40,111.25,58.59,40.62.
参考文献
(1)K.Endo,R.H.Grubbs,J.Am.Chem.Soc.,2011,133,8525.
(2)R.K.M.Khan,S.Torker,A.H.Hoveyda,J.Am.Chem.Soc.,2014,136,14337.
(3)M.J.Koh,R.K.M.Khan,S.Torker,M.Yu,M.S.Mikus,A.H.Hoveyda,Nature,2015,517,181.
(4)G.Occhipinti,F.R.Hansen,K.W.V.R.Jensen.J.Am.Chem.Soc.2013,135,3331.
(5)D.Eggerding,R.West,J.Org.Chem.,1976,41,3904.
Claims (3)
1.Z-选择性钌卡宾烯烃复分解催化剂,其结构特征是用式(I)所示:
其中:Ar为2,4,6-三甲基苯基或2,6-二异丙基苯基;R为氢或苯基。
2.权利要求1的Z-选择性钌卡宾烯烃复分解催化剂的制备方法,其特征在于,包括如下步骤:
氮气条件保护下,取Hoveyda-Grubbs II催化剂(IIa)与1,2-二酮-3-环丁烯-3,4-二巯基锌(III)或1,2-二酮-3-环丁烯-3,4-二巯基钠(IV)溶于干燥的有机溶剂中,在室温下搅拌反应至结束,抽干有机溶剂,加入二氯甲烷后离心,收集上层清液,干燥得化合物Ia,所述有机溶剂为四氢呋喃、二氯甲烷或甲苯;反应式为:
其中:Ar为2,4,6-三甲基苯基,R为H;
或:
氮气条件保护下,取催化剂(IIb)与1,2-二酮-3-环丁烯-3,4-二巯基锌(III)或1,2-二酮-3-环丁烯-3,4-二巯基钠(IV)溶于干燥的有机溶剂中,室温下搅拌,抽干有机溶剂,加入二氯甲烷后离心,收集上层清液,干燥得化合物Ib,所述有机溶剂为四氢呋喃、二氯甲烷或甲苯;反应式为:
其中:Ar为2,6-二异丙基苯基,R为H;
或:
氮气条件保护下,取催化剂(IIc)与1,2-二酮-3-环丁烯-3,4-二巯基锌(III)或1,2-二酮-3-环丁烯-3,4-二巯基钠(IV)溶于干燥的有机溶剂中,室温下搅拌,抽干有机溶剂,加入二氯甲烷后离心,收集上层清液,干燥得化合物Ic,所述有机溶剂为四氢呋喃、二氯甲烷或甲苯;反应式为:
其中:Ar为2,4,6-三甲基苯基;R为苯基。
3.权利要求1的Z-选择性钌卡宾烯烃复分解催化剂在催化烯烃复分解反应产生Z-式烯烃产物中的应用。
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