CN113559939A - 一种腈的α烷基化反应催化剂及其制备方法 - Google Patents
一种腈的α烷基化反应催化剂及其制备方法 Download PDFInfo
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- CN113559939A CN113559939A CN202110907170.8A CN202110907170A CN113559939A CN 113559939 A CN113559939 A CN 113559939A CN 202110907170 A CN202110907170 A CN 202110907170A CN 113559939 A CN113559939 A CN 113559939A
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- Prior art keywords
- catalyst
- bipyridine
- thionyl chloride
- asymmetric
- reaction
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- 238000011911 α-alkylation Methods 0.000 title claims abstract description 26
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- 238000000034 method Methods 0.000 claims abstract description 18
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Abstract
Description
技术领域
本发明属于有机化合物应用技术领域,具体涉及一种腈的α烷基化反应催化剂及其制备方法。
背景技术
通过借氢或者氢转移机理,将醇作为烷基化试剂来构建C-C键已经成为一种非常重要的方法。在这些反应中,水作为唯一的副产物实现了原子经济性和环境友好的目的。到目前为止,已经有多种类型的底物通过此方法获得了α烷基化反应的产物,包括酮类,酯类,吲哚等。此外,腈在有机合成中是一类非常重要的构建模块。腈类化合物能够非常便捷的转换成其他类型取代基的化合物,例如酰胺,羧酸衍生物,咪唑啉类衍生物,噁唑啉衍生物以及其他类型的生物活性分子。这些类型的化合物在有机合成,药物合成等方面都有着极其重要的作用。所以,腈类化合物的α烷基化反应已经引起人们的重视。因此,开发更高效的催化剂是腈类发生烷基化反应的重要方法之一。
发明内容
现有技术中的腈的α烷基化存在温度高,碱用量大、反应时间长等问题,针对现有技术中存在的问题,本发明提供一种腈的α烷基化反应催化剂及其在该反应中的应用,该方法反应时间短,碱用量少,廉价易得。
为解决上述技术问题,本发明采用以下技术方案:
一种腈的α烷基化反应催化剂,所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物,结构通式如下:
R3为C1-C15的烷基、芳基,R4为苯基或氢,R5为芳基、苯磺酰基或含取代基的苯磺酰基。
所述的催化剂在腈的α烷基化反应中的应用,腈的α烷基化反应过程如下:将催化剂、碱、腈类化合物、醇类化合物加入到溶剂中进行反应,反应结束后,通过薄层色谱分离提纯得到相应的目标产物,反应式为所述腈类化合物的通式为R1CH2CN,其中R1为苯基、对甲基苯基、对甲氧基苯基、对氯苯基、噻吩基;所述醇类化合物的通式为R2CH2OH,其中R2为芳基或烷基,芳基为苯基、对甲基苯基、对甲氧基苯基、对氯苯基等,烷基为正丁基、苯丙基;所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物;所用的碱为KOH,NaOH,CsOH,CsOH·H2O,KOtBu,NaOtBu,K2CO3,Na2CO3或Cs2CO3,所用的溶剂为甲苯、二甲苯、二氧六环或二氯乙烷,反应温度为120-140℃。
进一步,所述腈类化合物和醇类化合物的摩尔比为1:1-5,优选1:2。
进一步,以腈类化合物和醇类化合物的总物质的量为基准,所述催化剂用量为0.5-2.5mol%。
进一步,所述碱的用量为0.1-0.5equiv。
进一步,所述薄层色谱分离采用的展开剂为石油醚:乙酸乙酯(v:v)=20~30/1。
(一)一种腈的α烷基化反应催化剂,所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物,结构通式如下:R3为C1-C15的烷基、芳基,R4为氢,R5为芳基时,该催化剂的制备方法如下:含吡啶-吡啶-咪唑啉非对称NNN’钳形钌化合物按以下方法合成:以廉价的2,2'-联吡啶为起始原料,2,2'-联吡啶与双氧水在三氟乙酸溶液中反应生成2,2’-联吡啶-1-氧化物,接着,2,2’-联吡啶-1-氧化物和三甲基腈硅烷、苯甲酰氯在无水二氯甲烷中反应4天得到2,2’-联吡啶-6-甲腈,2,2’-联吡啶-6-甲腈在碱中发生水解得到2,2-联吡啶-6-羧酸,将2,2-联吡啶-6-羧酸在亚硫酰氯中回流,蒸出亚硫酰氯,加入无水二氯甲烷溶解,然后在冰浴条件滴加入手性氨基醇的无水二氯甲烷溶液中,滴加完毕后于室温反应过夜,然后旋干反应溶液,在亚硫酰氯中继续回流,回流结束后,蒸出亚硫酰氯,加入无水二氯甲烷溶解,同样在冰浴条件下滴加入芳香胺的无水二氯甲烷溶液中,滴加完毕后,于室温反应过夜,然后加入10%的氢氧化钠水溶液,萃取,干燥,浓缩,薄层层析分离得到非对称NNN’钳形配体。将NNN’钳形配体和RuCl2(PPh3)3在甲苯中回流,析出紫黑色固体,即为非对称NNN’钳形钌化合物。
具体步骤为:
(1)将2,2-联吡啶经过双氧水氧化,腈基化,水解得到2,2-联吡啶-6-羧酸;
(2)将2,2-联吡啶-6-羧酸在亚硫酰氯中回流,然后蒸去过量的亚硫酰氯,冰浴滴入手性氨基醇的无水二氯甲烷溶液中,滴加完毕后,反应过夜,然后旋干得到酰胺化合物;
(3)向酰胺化合物中加入亚硫酰氯继续回流反应,然后蒸去过量的亚硫酰氯,加入无水二氯甲烷和三乙胺,然后冰浴滴加芳香胺,室温搅拌过夜,最后加入氢氧化钠的水溶液,继续搅拌过夜,萃取,干燥,浓缩,薄层层析得非对称钳形配体;
(4)非对称钳形配体和RuCl2(PPh3)3在甲苯中回流反应,反应结束后冷却,直接析出固体,用乙醚洗涤,即得到目标化合物。
进一步,所述步骤(2)中2,2-联吡啶-6-羧酸与亚硫酰氯的摩尔比为1:(7-21),2,2-联吡啶-6-羧酸在亚硫酰氯中回流反应8-12h,所述2,2-联吡啶-6-羧酸与手性氨基醇的摩尔比为1:(1-2)。
进一步,所述步骤(3)中酰胺化合物与芳香胺的摩尔比为1:(1-2)。
进一步,所述步骤(3)中酰胺化合物在亚硫酰氯中回流时间为8-12h。
进一步,所述步骤(3)中酰胺化合物与亚硫酰氯的摩尔比为1:(7-21),酰胺化合物与三乙胺、氢氧化钠的摩尔比为1:6:(8-12)。
进一步,冰浴滴加手性氨基醇和芳香胺后室温搅拌反应8-16h。
进一步,所述步骤(3)中加入氢氧化钠的水溶液,继续搅拌反应8-12h,氢氧化钠的水溶液的质量浓度为10%。
进一步,所述步骤(4)中,非对称钳形配体和RuCl2(PPh3)3的物质的量之比为1:(1-2),回流反应时间为2-5小时。
(二)一种腈的α烷基化反应催化剂,所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物,结构通式如下:R3、R4为苯基,R5为苯磺酰基或含取代基的苯磺酰基;该催化剂的制备方法如下:以廉价的2,2'-联吡啶为起始原料,2,2'-联吡啶与双氧水在三氟乙酸溶液中反应生成2,2’-联吡啶-1-氧化物,接着,2,2’-联吡啶-1-氧化物和三甲基腈硅烷、苯甲酰氯在无水二氯甲烷中反应2-5天得到2,2’-联吡啶-6-甲腈,2,2’-联吡啶-6-甲腈和甲醇钠在无水甲醇中回流反应得到联吡啶亚胺类化合物,联吡啶亚胺类化合物继续和(1S,2S)-1,2-二苯基乙二胺在无水CH2Cl2中反应1-2天得到含有NH的咪唑啉类化合物,含有NH的咪唑啉类化合物和DMAP、对甲苯磺酰氯类化合物在二氯甲烷中反应3-7h,然后旋蒸、浓缩,薄层色谱分离即得到非对称钳形配体,配体化合物和三(三苯基膦)二氯化钌在甲苯中回流反应3h,快速硅胶柱纯化分离得到目标化合物。
具体步骤如下:
(1)将2,2-联吡啶经过双氧水氧化,腈基化得到2,2-联吡啶-6-甲腈,2,2-联吡啶-6-甲腈再经过醇解得到联吡啶亚胺类化合物;
(2)联吡啶亚胺类化合物经过环化反应得到含有NH的咪唑啉类产物;
(3)将含有NH的咪唑啉类环化产物磺酰化得到非对称钳形配体;
(4)非对称钳形配体和RuCl2(PPh3)3在甲苯中回流反应,经硅胶柱纯化分离得到吡啶-吡啶-含苯磺酰基咪唑啉非对称钳形钌化合物。
进一步,所述步骤(1)中联吡啶亚胺类化合物的制备方法如下:将2,2-联吡啶与双氧水在三氟乙酸溶液中反应过夜生成2,2’-联吡啶-1-氧化物,2,2’-联吡啶-1-氧化物和三甲基腈硅烷、苯甲酰氯在无水二氯甲烷中反应2-5天,生成2,2’-联吡啶-6-甲腈,2,2’-联吡啶-6-甲腈和甲醇钠在无水甲醇中回流反应0.5-1小时得到联吡啶亚胺类化合物。
进一步,2,2’-联吡啶-6-甲腈和甲醇钠的摩尔比为5:2。
进一步,所述步骤(2)中将联吡啶亚胺类化合物和(1S,2S)-1,2-二苯基乙二胺在无水二氯甲烷中回流1-2天得到含有NH的咪唑啉类环化产物,其中联吡啶亚胺类化合物和(1S,2S)-1,2-二苯基乙二胺的摩尔比为1:1-2。
进一步,所述步骤(3)的具体步骤如下:在0℃的条件下,向含有NH的咪唑啉类环化产物中加入苯磺酰氯类化合物和DMAP,室温反应3-7h,旋蒸、浓缩,薄层色谱分离即得到非对称钳形配体。
进一步,含有NH的咪唑啉类化合物和DMAP、对甲苯磺酰氯类化合物的物质的量之比为1:3:2.2。
进一步,薄层色谱分离展开剂为PE/EA(v:v)=1/1-5。
进一步,所述步骤(4)中非对称钳形配体和RuCl2(PPh3)3的物质的量之比为1:1-2。
进一步,所述步骤(4)中非对称钳形配体和RuCl2(PPh3)3在甲苯中回流反应3h。
进一步,所述步骤(4)中硅胶柱纯化分离时的洗脱剂为DCM/CH3OH(v:v)=30-70/1。
本发明的有益效果:本发明涉及了一种非对称钳形钌化合物催化的腈的α烷基化反应。该方法使用醇作为烷基化试剂,生成水作为唯一的副产物,符合原子经济性和环境友好的理念,该方法具有催化量的碱,反应时间短,经济等优点。同时,该方法为合成二取代腈提供了一种方便可行的方法,提高了该类化合物在药物等方面的应用潜力。
具体实施方式
下面结合具体实施例,对本发明做进一步说明:
实施例1
一种腈的α烷基化反应催化剂,所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物,结构通式如下:
(1)(S)-6-(4-(叔丁基)-1-(对甲苯基)-4,5-二氢-1H-咪唑-2-基)-2,2'-联吡啶的制备:2,2-联吡啶-6-羧酸(10mmol)在亚硫酰氯溶液(5mL)中回流反应8h,旋蒸除去过量的亚硫酰氯得浅黄色油状物,将其溶解在无水二氯甲烷溶液中,在冰浴条件下,滴加进溶解有L-叔亮氨醇(11mmol,1.29g)和三乙胺(30mmol,4.2mL)的无水二氯甲烷溶液中,滴加完毕后,在室温下反应过夜。反应结束后,将反应物旋干,加入乙酸乙酯,过滤除去不溶物,滤液旋干后继续加入亚硫酰氯(5mL)回流状态下反应8h,旋蒸除去过量的亚硫酰氯得红棕色油状物,将其溶解在无水二氯甲烷溶液中,在冰浴条件下,滴加进溶解有对甲苯胺(11mmol,1.2g)和三乙胺(60mmol,8mL)的无水二氯甲烷溶液中,室温搅拌过夜后,再加入10%的氢氧化钠水溶液(35mL),室温继续搅拌8-12h,结束后,分液,水相用二氯甲烷萃取3次,合并有机相,加入无水硫酸镁干燥,抽滤,旋干,柱层析分离(洗脱剂比例PE/EA=3/1~1/10)得到相应NNN’配体。棕色固体;产率:52%;熔点:119-121℃。1H NMR(400MHz,CDCl3)δ8.57(d,J=4.7Hz,1H),8.33(d,J=7.7Hz,1H),7.99(d,J=7.7,Hz,1H),7.84(t,J=7.7Hz,1H),7.53(ddd,J=7.7,7.7,1.8Hz,1H),7.37(d,J=8.0Hz,1H),7.19(ddd,J=7.5,4.8,1.2Hz,1H),6.99(d,J=8.0Hz,2H),6.80(d,J=8.0Hz,2H),4.23-4.13(m,1H),4.10-4.01(m,1H),3.71(t,J=8.4Hz,1H),2.26(s,3H),1.03(s,9H).13C{1H}NMR(100MHz,CDCl3)δ160.3,155.7,154.8,149.4,148.8,141.6,137.5,136.5,133.3,129.1,124.1,123.7,123.5,121.4,121.3,74.2,55.6,34.3,26.0,20.8.IR(cm-1):2949,2860,1592,1560,1515,1463,1432,1388,1362,1161,1144,992,821,786,750,564.HRMS(ESI-TOF)m/z:[M+H]+calcd forC24H27N4 371.2230,found 371.2238.
(2)(S)-6-(4-(叔丁基)-1-(对甲苯基)-4,5-二氢-1H-咪唑-2-基)-2,2'-联吡啶三苯基膦二氯化钌的制备:在装有搅拌回流装置的100mL的史莱克瓶中加入(S)-6-(4-(叔丁基)-1-(对甲苯基)-4,5-二氢-1H-咪唑-2-基)-2,2'-联吡啶(0.4mmol,148mg)、三(三苯基膦)二氯化钌(0.4mmol,383mg)和30mL甲苯,在氮气条件下回流反应3h,反应结束后,冷却析出固体,抽滤,用乙醚洗涤,即得到产品(170mg)。产率53%。紫色固体,熔点:>300℃。1HNMR(600MHz,CDCl3)δ9.55-9.45(m,1H),7.74(d,J=7.9Hz,1H),7.63(d,J=7.9,Hz,1H),7.48-7.37(m,7H),7.25-7.03(m,13H),6.93-6.69(m,2H),6.48(d,J=7.9Hz,1H),4.07-3.98(m,1H),3.97-3.90(m,1H),3.88-3.77(m,1H),2.38(s,3H),1.27(s,9H).13C{1H}NMR(150MHz,CDCl3)δ160.3,157.9,138.3,136.8,134.8,133.13,133.11,131.6,131.3,130.1,128.9,128.2,127.7,127.6,126.4,125.0,121.1,120.5,57.1,35.9,29.8,27.4,21.1.31P{1H}NMR(162MHz,CDCl3)δ42.2(s,PPh3).IR(cm-1):ν3053,2950,2869,1739,1548,1524,1511,1490,1480,1426,1374,1363,1296,1084,833,779,749,699,685,524,510,500.HRMS(ESI-TOF)m/z:[M–2Cl-]2+calcd for C42H41N4PRu 367.1051,found 367.1057.
实施例2
一种腈的α烷基化反应催化剂,所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物,结构通式如下:
(1)6-((4S,5S)-4,5-二苯基-1-甲苯磺酰基-4,5-二氢-1H-咪唑-2-基)-2,2'-联吡啶的制备:
a:将2,2’-联吡啶-6-甲腈(1.0g,5.52mmol)和甲醇钠(120mg,2.21mmol)加入到50mL的史莱克瓶中,然后加入20mL的无水甲醇回流反应30min,反应结束后,加入冰醋酸将pH调节至中性。然后将溶剂旋干,放入真空干燥箱烘干,得到白色固体;
b:将所得白色固体和(1S,2S)-1,2-二苯基乙二胺(1.29g,6.07mmol)加入到100mL的圆底烧瓶中,然后加入50mL的无水二氯甲烷回流反应过夜,反应结束后,旋干溶剂,柱层析分离(PE/EA=1/1)得到中间体;
c:将中间体(376.5mg,1.0mmol)和DMAP(366.5mg,3.0mmol)加入到50mL的史莱克瓶中,然后加入20mL的二氯甲烷,将溶液冷却至0℃后,加入对甲基苯磺酰氯(419.4mg,2.2mmol),将反应物于室温条件下反应4h,然后用饱和氯化铵的水溶液洗涤,再用二氯甲烷洗涤水相三次,混合有机相,用无水硫酸镁干燥,过滤,浓缩,薄层色谱分离(PE/EA=1/1)得到目标化合物化合物。白色固体;产率:0.45g,91%;熔点:181-182℃。1H NMR(400MHz,d6-DMSO)δ8.75(d,J=4.7Hz,1H),8.56(d,J=8.0Hz,1H),8.17(t,J=7.7Hz,1H),8.02-7.91(m,3H),7.55-7.46(m,5H),7.44-7.39(m,1H),7.37-7.30(m,5H),7.15-7.08(m,4H),5,18(d,J=4.4Hz,1H),5.15(d,J=4.4Hz,1H),2.29(s,3H).13C{1H}NMR(100MHz,CDCl3)δ158.7,155.2,155.1,149.7,149.1,143.6,141.5,141.0,137.6,136.7,136.4,129.7,129.13,129.07,128.98,128.3,128.0,127.6,126.6,126.4,124.6,123.8,122.3,121.5,78.6,71.7,21.5.IR(cm-1):3372,3269,3095,3045,1621,1583,1457,1432,1352,1174,1096,1074,785,764,699,670,598,541.HRMS(ESI-TOF)m/z:[M+H]+calcd for C32H27N4O2S531.1849,found 531.1854.
(2)钌化合物b的合成:在氩气氛围中,将上述配体化合物(0.40mmol),RuCl2(PPh3)3(383.25mg,0.40mmol)加入到100mL的史莱克瓶中,然后加入30mL的无水甲苯,混合物在氩气保护条件下回流反应3h。反应结束后,冷却,然后在70℃将甲苯减压蒸出。粗产物通过快速硅胶柱纯化分离(DCM/CH3OH=50/1)钌化合物b。紫色固体;产率:0.20g,51%;熔点:206-208℃。1H NMR(600MHz,CDCl3)δ9.17(d,J=5.5Hz,1H),8.56(d,J=8.0Hz,1H),7.83(d,J=8.0Hz,1H),7.67(d,J=7.8Hz,1H),7.54(d,J=8.0Hz,2H),7.48-7.39(m,2H),7.33(d,J=7.5Hz,2H),7.26-7.22(m,3H),7.19-7.11(m,9H),7.07(d,J=8.0Hz,2H),7.04-6.89(m,12H),5.17-5.09(m,2H),2.32(s,3H).13C{1H}NMR(150MHz,CDCl3)δ161.8,160.4,158.2,154.6,153.9,145.6,140.2,138.5,137.2,135.5,132.9,132.8,131.4,131.1,130.5,130.2,129.3,129.2,128.9,128.5,128.1,128.0,127.93,127.87,127.7,126.7,126.3,125.7,121.4,120.4,76.5,72.0,21.7.31P{1H}NMR(243MHz,CDCl3)δ37.0(s,PPh3).IR(cm-1):ν3053,3029,1596,1480,1434,1365,1301,1169,1087,772,743,694,670,662,595,520,499.HRMS(ESI-TOF)m/z:[M–2Cl-]2+calcd for C50H41N4O2PRuS 447.0860,found 447.0864.
实施例3
一种腈的α烷基化反应催化剂,所述催化剂为吡啶-吡啶-咪唑啉非对称钳形钌化合物,结构通式如下:
(1)6-((4S,5S)-1-((4-硝基苯基)磺酰基)-4,5-二苯基-4,5-二氢-1H-咪唑-2-基)-2,2'-联吡啶:将实施例二步骤(1)c中的对甲基苯磺酰氯替换为对硝基苯磺酰氯(487.6mg,2.2mmol),其他制备方法同实施例二步骤(1)。白色固体;产率:0.55g,97%;熔点:184-185℃。1H NMR(400MHz,d6-DMSO)δ8.73(d,J=4.6Hz,1H),8.53(d,J=8.0Hz,1H),8.20(t,J=7.7Hz,1H),8.06(d,J=7.7Hz,1H),7.98(d,J=8.8Hz,2H),7.83-7.72(m,2H),7.59-7.43(m,8H),7.42-7.33(m,3H),7.30-7.23(m,2H),5.39(d,J=3.6Hz,1H),5.29(d,J=3.6Hz,1H).13C{1H}NMR(100MHz,d6-DMSO)δ156.9,154.7,154.1,149.7,149.5,148.8,143.9,140.5,140.4,138.7,137.0,129.3,128.9,128.5,128.4,127.9,126.2,126.1,124.6,124.5,124.2,122.5,120.5,77.5,71.0.IR(cm-1):3114,3096,3000,1642,1585,1581,1528,1459,1431,1374,1348,1311,1177,1121,1091,1058,1022,859,834,780,761,738,702,654,626,585,552.HRMS(ESI-TOF)m/z:[M+H]+calcd for C31H24N5O4S562.1544,found 562.1547.
(2)钌化合物c的合成:制备方法同实施例二(2)。紫色固体;产率:0.19g,47%;熔点:206-208℃。1H NMR(600MHz,CDCl3)δ9.21(d,J=4.9Hz,1H),8.48(d,J=8.1Hz,1H),8.01(d,J=8.3Hz,2H),7.88-7.76(m,3H),7.68(d,J=8.1Hz,1H),7.57-7.52(m,1H),7.51-7.48(m,2H),7.44(d,J=8.1Hz,1H),7.29-7.24(m,4H),7.21-7.18(m,1H),7.17-7.09(m,8H),7.01-6.87(m,11H),5.28(d,J=11.3Hz,2H).13C{1H}NMR(150MHz,CDCl3)δ161.2,160.5,158.0,154.4,154.1,151.2,139.2,138.4,137.8,135.8,132.83,132.77,131.0,130.7,130.2,129.5,129.3,129.1,128.53,128.46,128.44,128.1,128.04,127.96,127.4,127.2,126.6,125.4,124.8,121.4,120.4,75.7,72.2.31P{1H}NMR(243MHz,CDCl3)δ36.4(s,PPh3).IR(cm-1):ν3055,3025,1603,1528,1480,1434,1372,1346,1312,1176,1086,849,738,694,680,625,584,522,499.HRMS(ESI-TOF)m/z:[M–2Cl-]2+calcd for C49H38N5O4PRuS462.5708,found 462.5712.
上述催化剂催化腈的α烷基化反应的应用实例如下:
氩气氛围下,向15mL的干燥的史莱克管中依次加入非对称钳形钌(II)催化剂、碱,腈类,醇,然后加入甲苯进行反应,反应结束后,冷却,粗产物通过薄层色谱分离纯化得到相应的目标产物。
实施例4:催化剂a催化的2-(4-溴苯基)-3-苯基丙烷腈的合成:氩气氛围下,向15mL的干燥的史莱克管中依次加入催化剂a(0.005mmol,1.0mol%)、KOH(0.1mmol,0.20equiv),对溴苯乙腈(0.5mmol,98.02mg),苄醇(1.0mmol,108.14mg),然后加入0.8mL的甲苯,反应混合物在120℃的温度下反应4h,反应结束后,冷却,然后加入二氯甲烷溶解转移到100mL的圆底烧瓶中,在减压条件下将溶剂旋出,粗产物通过薄层色谱分离(PE/EA=20~30/1)纯化得到相应的目标产物。白色固体;产率:29mg,20%;熔点:80-81℃。1H NMR(400MHz,CDCl3)δ7.52-7.43(m,2H),7.33-7.26(m,3H),7.14-7.06(m,4H),3.97(t,J=7.0Hz,1H),3.18(dd,J=13.4,7.7Hz,1H),3.09(dd,J=13.4,6.7Hz,1H).13C{1H}NMR(100MHz,CDCl3)δ135.8,134.1,132.2,129.2,128.7,127.6,122.3,119.9,42.0,39.2.IR(cm-1):3054,3027,2941,2885,2242,1487,1455,1407,1073,1013,816,742,696,568,490.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H13BrN 286.0226,found 286.0228.
实施例5:催化剂b催化的2-(4-溴苯基)-3-苯基丙烷腈的合成:氩气氛围下,向15mL的干燥的史莱克管中依次加入催化剂b(0.005mmol,1.0mol%)、KOH(0.1mmol,0.2equiv),对溴苯乙腈(0.5mmol,98.02mg),苄醇(1.0mmol,108.14mg),然后加入0.8mL的甲苯,反应混合物在120℃的温度下反应4h,反应结束后,冷却,然后加入二氯甲烷溶解转移到100mL的圆底烧瓶中,在减压条件下将溶剂旋出,粗产物通过薄层色谱分离(PE/EA=20~30/1)纯化得到相应的目标产物。白色固体;产率:53mg,37%;熔点:80-81℃。化合物表征见实施例4。
实施例6:催化剂c催化的2-(4-溴苯基)-3-苯基丙烷腈的合成:氩气氛围下,向15mL的干燥的史莱克管中依次加入催化剂c(0.005mmol,1.0mol%)、KOH(0.1mmol,0.2equiv),对溴苯乙腈(0.5mmol,98.02mg),苄醇(1.0mmol,108.14mg),然后加入0.8mL的甲苯,反应混合物在120℃的温度下反应4h,反应结束后,冷却,然后加入二氯甲烷溶解转移到100mL的圆底烧瓶中,在减压条件下将溶剂旋出,粗产物通过薄层色谱分离(PE/EA=20~30/1)纯化得到相应的目标产物。白色固体;产率:53mg,37%;熔点:80-81℃。化合物表征见实施例4。
实施例7:催化剂c催化的2-(4-溴苯基)-3-苯基丙烷腈的合成:氩气氛围下,向15mL的干燥的史莱克管中依次加入催化剂c(0.0075mmol,1.5mol%)、KOH(0.075mmol,0.15equiv),对溴苯乙腈(0.5mmol,98.02mg),苄醇(1.0mmol,108.14mg),然后加入0.8mL的甲苯,反应混合物在140℃的温度下反应4h,反应结束后,冷却,然后加入二氯甲烷溶解转移到100mL的圆底烧瓶中,在减压条件下将溶剂旋出,粗产物通过薄层色谱分离(PE/EA=20~30/1)纯化得到相应的目标产物。白色固体;产率:119mg,83%;熔点:80-81℃。化合物表征见实施例4。
实施例8:2-(4-甲氧基苯基)-3-苯代丙腈的合成:将实施例7中的对溴苯乙腈换成对甲氧基苯乙腈(0.5mmol,73.56mg),其它制备方法同实施例7。White solid.Yield:107mg,90%.Mp:63-64℃.1H NMR(600MHz,CDCl3)δ7.33-7.22(m,3H),7.14(dd,J=8.0,19.7Hz,4H),6.86(d,J=8.0Hz,2H),3.94(t,J=8.0Hz,1H),3.80(s,3H),3.16(dd,J=13.2,8.4Hz,1H),3.09(dd,J=13.6,6.5Hz,1H).13C{1H}NMR(150MHz,CDCl3)δ159.4,136.5,129.3,128.65,128.61,127.3,127.2,120.6,114.4,55.3,42.3,39.0.IR(cm-1):3062,2971,2924,2856,2244,1616,1613,1512,1456,1256,1179,1031,831,739,699.HRMS(ESI-TOF)m/z:[M+Na]+calcd for C16H15NNaO 260.1046,found 260.1048.
实施例9:2-(4-(叔丁基)苯基)-3-苯丙腈的合成:将实施例7中的对溴苯乙腈换成对叔丁基苯乙腈(0.5mmol,86.63mg),其它制备方法同实施例7。White solid.Yield:55mg,42%.Mp:124-125℃.1H NMR(400MHz,CDCl3)δ7.41-7.35(m,2H),7.34-7.26(m,3H),7.24-7.14(m,4H),3.97(dd,J=8.6,6.4Hz,1H),3.21-3.07(m,2H),1.32(s,9H).13C{1H}NMR(100MHz,CDCl3)δ151.3,136.6,132.3,129.2,128.7,127.3,127.1,126.0,120.5,42.3,39.5,34.6,31.3.IR(cm-1):3064,3060,2961,2925,2874,2240,1728,1606,1514,1458,1362,1272,1110,1024,979,747,706,585.HRMS(ESI-TOF)m/z:[M+H]+calcd for C19H22N264.1747,found 264.1749.
实施例10:3-苯基-2-(对甲苯基)丙腈的合成:将实施例7中的对溴苯乙腈换成对甲基苯乙腈(0.5mmol,65.59mg),其它制备方法同实施例7。White solid.Yield:100mg,90%.Mp:71-73℃.1H NMR(400MHz,CDCl3)δ7.33-7.23(m,3H),7.19-7.08(m,6H),3.96(dd,J=8.4,6.4Hz,1H),3.17(dd,J=13.7,8.4Hz,1H),3.10(dd,J=13.7,6.4Hz,1H),2.35(s,3H).13C{1H}NMR(100MHz,CDCl3)δ138.0,136.5,132.3,129.7,129.2,128.6,127.3,120.6,42.3,39.5,21.1.IR(cm-1):3055,3027,2922,2857,2240,1601,1495,1438,1027,798,736,695,572,492.HRMS(ESI-TOF)m/z:[M+H]+calcd for C16H16N 222.1277,found 222.1278.
实施例11:2,3-二苯基丙腈的合成:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),其它制备方法同实施例7。White solid.Yield:99mg,95%.Mp:52-53℃.1H NMR(400MHz,CDCl3)δ7.41-7.19(m,8H),7.17-7.07(m,2H),3.98(dd,J=8.4,6.4Hz,1H),3.17(dd,J=13.6,8.1Hz,1H),3.11(dd,J=13.6,6.6Hz,1H).13C{1H}NMR(100MHz,CDCl3)δ136.3,135.3,129.3,129.1,128.7,128.2,127.5,127.4,120.4,42.2,39.8.IR(cm-1):3065,3032,2924,2854,2243,1599,1496,1455,1073,1024,753,696.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H14N 208.1121,found 208.1123.
实施例12:2-(4-氟苯基)-3-苯代丙腈:将实施例7中的对溴苯乙腈换成对氟苯乙腈(0.5mmol,67.57mg),其它制备方法同实施例7。White solid.Yield:97mg,86%.Mp:85-86℃.1H NMR(600MHz,CDCl3)δ7.33-7.23(m,3H),7.23-7.15(m,2H),7.13-7.06(m,2H),7.06-6.98(m,2H),3.99(t,J=7.3Hz,1H),3.19(dd,J=13.3,8.0Hz,1H),3.10(dd,J=13.3,6.6Hz,1H).13C{1H}NMR(150MHz,CDCl3)δ162.5(d,JF-C=247.3Hz),135.9,130.95(d,JF-C=3.0Hz),129.3,129.2,128.7,127.5,120.2,116.0(d,JF-C=21.9Hz),42.2,39.0.19FNMR(564MHz,CDCl3)δ-113.52.IR(cm-1):2938,2888,2244,1897,1605,1509,1457,1218,1159,1078,1017,834,816,744,701,568.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H13FN226.1027,found 226.1030.
实施例13:2-(4-氯苯基)-3-苯代丙腈:将实施例7中的对溴苯乙腈换成对氯苯乙腈(0.5mmol,75.80mg),其它制备方法同实施例7。White solid.Yield:97mg,80%.Mp:79-80℃.1H NMR(400MHz,CDCl3)δ7.36-7.26(m,5H),7.20-7.13(m,2H),7.12-7.07(m,2H),3.98(t,J=7.3Hz,1H),3.18(dd,J=13.6,8.0Hz,1H),3.10(dd,J=13.6,6.6Hz,1H).13C{1H}NMR(100MHz,CDCl3)δ135.8,134.3,133.6,129.24,129.20,128.9,128.7,127.5,120.0,42.0,39.1.IR(cm-1):3089,3054,2939,2245,1605,1493,1454,1412,1094,1089,1017,828,744,701,691,569,494.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H13ClN 242.0731,found242.0734.
实施例14:2-(3-甲氧基苯基)-3-苯代丙腈:将实施例7中的对溴苯乙腈换成间甲氧基苯乙腈(0.5mmol,73.56mg),其它制备方法同实施例7。Yellow oil.Yield:107mg,90%.1H NMR(600MHz,CDCl3)δ7.32-7.24(m,4H),7.17-7.12(m,2H),6.85(d,J=7.7Hz,2H),6.77(s,1H),3.96(t,J=7.4Hz,1H),3.77(s,3H),3.21-3.15(m,1H),3.13(dd,J=13.3,6.4Hz,1H).13C{1H}NMR(150MHz,CDCl3)δ160.0,136.7,136.3,130.1,129.2,128.7,127.4,120.3,119.7,113.8,113.2,55.3,42.1,39.8.IR(cm-1):3086,3035,2958,2844,2246,1606,1496,1456,1267,1155,1053,879,787,739,700.HRMS(ESI-TOF)m/z:[M+H]+calcd forC16H16NO 238.1226,found 238.1228.
实施例15:2-(3-氯苯基)-3-苯代丙腈:将实施例7中的对溴苯乙腈换成间氯苯乙腈(0.5mmol,75.80mg),其它制备方法同实施例7。White solid.Yield:97mg,80%.Mp:61-63℃;1H NMR(600MHz,CDCl3)δ7.33-7.22(m,6H),7.15-7.08(m,3H),3.96(t,J=7.3Hz,1H),3.17(dd,J=13.6,8.3Hz,1H),3.10(dd,J=13.6,6.3Hz,1H).13C{1H}NMR(150MHz,CDCl3)δ137.1,135.8,134.9,130.3,129.2,128.8,128.6,127.7,127.6,125.8,119.8,42.0,39.4.IR(cm-1):3057,2960,2932,2878,2242,1598,1594,1500,1476,1456,1439,1194,1166,1098,1083,919,900,781,749,715,691,595,574,484.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H13ClN 242.0731,found 242.0734.
实施例16:3-苯基-2-(邻甲苯基)丙腈:将实施例7中的对溴苯乙腈换成邻甲基苯乙腈(0.5mmol,65.59mg),其它制备方法同实施例7。Colorless oil.Yield:22mg,20%.1HNMR(600MHz,CDCl3)δ7.42(d,J=6.6Hz,1H),7.33-7.26(m,3H),7.25-7.21(m,2H),7.19-7.14(m,3H),4.14(t,J=6.6Hz,1H),3.19-3.11(m,1H),3.10-3.03(m,1H),2.25(s,3H).13C{1H}NMR(150MHz,CDCl3)δ136.6,135.1,133.7,131.0,129.2,128.7,128.3,127.7,127.4,126.9,120.7,41.0,36.6,19.1.IR(cm-1):3069,3034,2941,2887,2245,1068,1498,1456,1081,1052,762,751,701.HRMS(ESI-TOF)m/z:[M+H]+calcd for C16H16N 222.1277,found222.1279.
实施例17:2-(3,5-二甲基苯基)-3-苯代丙腈:将实施例7中的对溴苯乙腈换成3,5-二甲基苯乙腈(0.5mmol,72.60mg),其它制备方法同实施例7。Yellow oil.Yield:113mg,96%.1H NMR(400MHz,CDCl3)δ7.35-7.22(m,3H),7.21-7.12(m,2H),6.95(s,1H),6.89(s,2H),3.90(dd,J=9.0,6.2Hz,1H),3.20-3.04(m,2H),2.30(s,6H).13C{1H}NMR(100MHz,CDCl3)δ138.7,136.7,135.2,129.8,129.2,128.6,127.4,125.2,120.6,42.4,39.9,21.3.IR(cm-1):3035,2934,2881,2246,1610,1498,1456,1387,1076,1042,853,754,715,701.HRMS(ESI-TOF)m/z:[M+H]+calcd for C17H18N 236.1434,found 236.1437.
实施例18:3-苯基-2-(噻吩-2-基)丙腈:将实施例7中的对溴苯乙腈换成2-噻吩乙腈(0.5mmol,61.59mg),其它制备方法同实施例7。Colorless oil.Yield:31mg,29%.1HNMR(600MHz,CDCl3)δ7.34-7.25(m,4H),7.19(d,J=7.3Hz,2H),7.00-6.97(m,1H),6.97-6.92(m,1H),4.27(t,J=7.4Hz,1H),3.28-3.20(m,2H).13C{1H}NMR(150MHz,CDCl3)δ137.2,136.0,129.2,128.8,127.6,127.1,126.5,125.7,119.5,42.3,34.9.IR(cm-1):3075,3034,2955,2883,2246,1608,1498,1457,1080,1052,762,752,701,584.HRMS(ESI-TOF)m/z:[M+H]+calcd for C13H12NS 214.0685,found 214.0684.
实施例19:3-(4-甲氧基苯基)-2-苯代丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成对甲氧基苄醇(1.0mmol,138.16mg),其它制备方法同实施例7。Yellow solid.Yield:105mg,89%.Mp:83-84℃.1H NMR(600MHz,CDCl3)δ7.38-7.28(m,3H),7.27-7.22(m,2H),7.05(d,J=8.0Hz,2H),6.82(d,J=8.0Hz,2H),3.95(t,J=7.1Hz,1H),3.78(s,3H),3.16-3.04(m,2H).13C{1H}NMR(150MHz,CDCl3)δ158.9,135.3,130.3,129.0,128.4,128.1,127.5,120.5,114.0,55.3,41.4,40.1.IR(cm-1):3082,3010,2957,2958,2834,2241,1614,1607,1513,1466,1301,1249,1183,1177,1109,1033,838,798,770,742,705,574,522.HRMS(ESI-TOF)m/z:[M+H]+calcd for C16H16NO 238.1226,found238.1220.
实施例20:2-苯基-3-(对甲苯基)丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成对甲基苄醇(1.0mmol,122.16mg),其它制备方法同实施例7。White solid.Yield:99mg,90%.Mp:53-54℃.1H NMR(400MHz,CDCl3)δ7.39-7.29(m,3H),7.29-7.22(m,2H),7.09(d,J=8.0Hz,2H),7.02(d,J=8.0Hz,2H),3.96(dd,J=8.4,6.8Hz,1H),3.18-3.04(m,2H),2.32(s,3H).13C{1H}NMR(150MHz,CDCl3)δ137.1,135.4,133.3,129.3,129.1,129.0,128.2,127.5,120.4,41.8,40.0,21.1.IR(cm-1):3068,3034,2934,2870,2243,1601,1515,1512,1455,1108,1077,1022,912,826,782,780,739,694,575,496.HRMS(ESI-TOF)m/z:[M+H]+calcd for C16H16N 222.1277,found 222.1279.
实施例21:3-(4-氯苯基)-2-苯代丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成对氯苄醇(1.0mmol,142.58mg),其它制备方法同实施例7。White solid.Yield:65mg,54%.Mp:107-108℃.1H NMR(600MHz,CDCl3)δ7.42-7.29(m,3H),7.27-7.21(m,4H),7.04(d,J=7.8Hz,2H),3.98(t,J=7.4Hz,1H),3.20-3.05(m,2H).13C{1H}NMR(100MHz,CDCl3)δ134.8,134.6,133.4,130.7,129.1,128.8,128.4,127.5,120.1,41.4,39.6.IR(cm-1):3036,2953,2884,2246,1633,1494,1455,1411,1089,1016,843,804,787,755,697,575,498.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H13ClN 242.0731,found242.0734.
实施例22:3-(4-溴苯基)-2-苯代丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成对溴苄醇(1.0mmol,187.03mg),其它制备方法同实施例7。White solid.Yield:80mg,56%.Mp:106-108℃.1H NMR(600MHz,CDCl3)δ7.40(d,J=8.3Hz,2H),7.38-7.31(m,3H),7.25-7.21(m,2H),6.98(d,J=8.2Hz,2H),3.98(t,J=7.3Hz,1H),3.17-3.07(m,2H).13C{1H}NMR(150MHz,CDCl3)δ135.1,134.8,131.8,131.0,129.1,128.4,127.5,121.5,120.1,41.5,39.5.IR(cm-1):3080,3032,2965,2837,2880,2245,1738,1602,1487,1455,1406,1293,1068,1011,841,785,755,696,654,574,495.HRMS(ESI-TOF)m/z:[M+H]+calcd for C15H13BrN 286.0226,found 286.0228.
实施例23:2-苯基-3-(4-(三氟甲基)苯基)丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成对三氟甲基苄醇(1.0mmol,176。14mg),其它制备方法同实施例7。White solid.Yield:87mg,63%.Mp:80-81℃.1H NMR(600MHz,CDCl3)δ7.55(d,J=7.8Hz,2H),7.40-7.32(m,3H),7.28-7.21(m,4H),4.03(t,J=7.2Hz,1H),3.28-3.16(m,2H).13C{1H}NMR(150MHz,CDCl3)δ140.1,134.6,130.0,129.7,129.2,128.5,127.4,125.6(q,3JC-F=3.5Hz),124.1(q,1JC-F=271.2Hz),119.9,41.8,39.3.19F NMR(564MHz,CDCl3)δ-62.34.IR(cm-1):3100,3046,2966,2244,1617,1494,1457,1421,1322,1152,1107,1065,1018,853,820,793,749,698,654,595.HRMS(ESI-TOF)m/z:[M+H]+calcd for C16H13F3N276.0995,found 276.0993.
实施例24:2-苯基-3-(间甲苯基)丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成间甲基苄醇(1.0mmol,122.16mg),其它制备方法同实施例7。Colorless oil.Yield:107mg,97%.1H NMR(600MHz,CDCl3)δ7.37-7.29(m,3H),7.27(d,J=7.4Hz,2H),7.18(t,J=7.6Hz,1H),7.07(d,J=7.6Hz,1H),6.97-6.90(m,2H),3.98(dd,J=8.4,6.3Hz,1H),3.14(dd,J=13.6,8.7Hz,1H),3.08(dd,J=13.6,6.4Hz,1H),2.31(s,3H).13C{1H}NMR(150MHz,CDCl3)δ138.3,136.3,135.5,130.0,129.1,128.5,128.2,128.1,127.5,126.2,120.5,42.3,39.9,21.4.IR(cm-1):3074,3041,2953,2886,2246,1612,1498,1456,778,700,581.HRMS(ESI-TOF)m/z:[M+H]+calcd for C16H16N 222.1277,found222.1278.
实施例25:3-(2-溴苯基)-2-苯代丙腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成邻溴苄醇(1.0mmol,187.03mg),其它制备方法同实施例7。White solid.Yield:99mg,69%.Mp:60-61℃.1H NMR(600MHz,CDCl3)δ7.59(d,J=7.8Hz,1H),7.41-7.36(m,4H),7.36-7.31(m,1H),7.28-7.22(m,2H),7.16(t,J=7.4Hz,1H),4.20(t,J=7.8Hz,1H),3.30(dd,J=13.2,5.6Hz,1H),3.25-3.18(m,1H).13C{1H}NMR(150MHz,CDCl3)δ135.8,135.3,133.1,131.9,129.3,129.1,128.3,127.8,127.3,124.4,120.1,42.9,37.7.IR(cm-1):3085,3051,2949,2245,1605,1568,1493,1472,1450,1286,1162,1117,1079,1028,979,756,700,659,575,503.HRMS(ESI-TOF)m/z:[M+H]+calcd forC15H13BrN 286.0226,found 286.0225.
实施例26:2,5-二苯基戊腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成3-苯丙醇(1.0mmol,136.19mg),其它制备方法同实施例7。Colorlessoil.Yield:104mg,89%.1H NMR(600MHz,CDCl3)δ7.38-7.33(m,2H),7.33-7.25(m,5H),7.19(t,J=7.6Hz,1H),7.14(d,J=7.6Hz,2H),3.77(dd,J=8.3,5.6Hz,1H),2.6(t,J=7.3Hz,2H),1.99-1.73(m,4H).13C{1H}NMR(150MHz,CDCl3)δ141.2,135.8,129.1,128.5,128.4,128.1,127.3,126.1,120.8,37.3,35.3,35.1,28.6.IR(cm-1):3037,2947,2863,2240,1602,1496,1454,1331,1078,1028,915,754,697,598,521.HRMS(ESI-TOF)m/z:[M+H]+calcd forC17H18N 236.1434,found 236.1433.
实施例27:2-苯基己腈:将实施例7中的对溴苯乙腈换成苯乙腈(0.5mmol,58.58mg),苄醇换成正丁醇(1.0mmol,74.12mg),其它制备方法同实施例7。Pale yellowoil.Yield:64mg,74%.1H NMR(600MHz,CDCl3)δ7.40-7.28(m,5H),3.76(t,J=7.3Hz,1H),1.97-1.81(m,2H),1.53-1.31(m,4H),0.90(t,J=7.0Hz,3H).13C{1H}NMR(150MHz,CDCl3)δ136.1,129.1,128.0,127.2,121.0,37.4,35.7,29.2,22.1,13.8.IR(cm-1):3092,3065,2962,2937,2873,2245,1606,1497,1456,1122,1094,1035,757,700.HRMS(ESI-TOF)m/z:[M+H]+calcd for C12H16N 174.1277,found 174.1274.。
Claims (10)
2.根据权利要求1所述的腈的α烷基化反应催化剂的制备方法如下:以2,2'-联吡啶为起始原料,2,2'-联吡啶与双氧水在三氟乙酸溶液中反应生成2,2’-联吡啶-1-氧化物,接着,2,2’-联吡啶-1-氧化物和三甲基腈硅烷、苯甲酰氯在无水二氯甲烷中反应4天得到2,2’-联吡啶-6-甲腈,2,2’-联吡啶-6-甲腈在碱中发生水解得到2,2-联吡啶-6-羧酸,将2,2-联吡啶-6-羧酸在亚硫酰氯中回流,蒸出亚硫酰氯,加入无水二氯甲烷溶解,然后在冰浴条件滴加入手性氨基醇的无水二氯甲烷溶液中,滴加完毕后于室温反应过夜,然后旋干反应溶液,在亚硫酰氯中继续回流,回流结束后,蒸出亚硫酰氯,加入无水二氯甲烷溶解,同样在冰浴条件下滴加入芳香胺的无水二氯甲烷溶液中,滴加完毕后,于室温反应过夜,然后加入氢氧化钠水溶液,萃取,干燥,浓缩,薄层层析分离得到非对称NNN’钳形配体;将非对称NNN’钳形配体和RuCl2(PPh3)3在甲苯中回流,析出紫黑色固体,即为吡啶-吡啶-咪唑啉非对称NNN’钳形钌化合物。
3.根据权利要求2所述的腈的α烷基化反应催化剂的制备方法,其特征在于步骤如下:
(1)将2,2-联吡啶经过双氧水氧化,腈基化,水解得到2,2-联吡啶-6-羧酸;
(2)将2,2-联吡啶-6-羧酸在亚硫酰氯中回流,然后蒸去过量的亚硫酰氯,冰浴滴入手性氨基醇的无水二氯甲烷溶液中,滴加完毕后,反应过夜,然后旋干得到酰胺化合物;
(3)向酰胺化合物中加入亚硫酰氯继续回流反应,然后蒸去过量的亚硫酰氯,加入无水二氯甲烷和三乙胺,然后冰浴滴加芳香胺,室温搅拌过夜,最后加入氢氧化钠的水溶液,继续搅拌过夜,萃取,干燥,浓缩,薄层层析得非对称钳形配体;
(4)非对称钳形配体和RuCl2(PPh3)3在甲苯中回流反应,反应结束后冷却,直接析出固体,用乙醚洗涤,即得到目标化合物。
4.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:所述步骤(2)中2,2-联吡啶-6-羧酸与亚硫酰氯的摩尔比为1:(7-21),2,2-联吡啶-6-羧酸在亚硫酰氯中回流反应8-12h,所述2,2-联吡啶-6-羧酸与手性氨基醇的摩尔比为1:(1-2)。
5.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:所述步骤(3)中酰胺化合物与芳香胺的摩尔比为1:(1-2)。
6.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:所述步骤(3)中酰胺化合物在亚硫酰氯中回流时间为8-12h。
7.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:所述步骤(3)中酰胺化合物与亚硫酰氯的摩尔比为1:(7-21),酰胺化合物与三乙胺、氢氧化钠的摩尔比为1:6:(8-12)。
8.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:冰浴滴加手性氨基醇和芳香胺后室温搅拌反应8-16h。
9.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:所述步骤(3)中加入氢氧化钠的水溶液,继续搅拌反应8-12h,氢氧化钠的水溶液的质量浓度为10%。
10.根据权利要求3所述的腈的α烷基化反应催化剂的制备方法,其特征在于:所述步骤(4)中,非对称钳形配体和RuCl2(PPh3)3的物质的量之比为1:(1-2),回流反应时间为2-5小时。
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