CN104140393A - 一种芳环/芳杂环叔丁醇酯类化合物的制备方法 - Google Patents

一种芳环/芳杂环叔丁醇酯类化合物的制备方法 Download PDF

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CN104140393A
CN104140393A CN201310667774.5A CN201310667774A CN104140393A CN 104140393 A CN104140393 A CN 104140393A CN 201310667774 A CN201310667774 A CN 201310667774A CN 104140393 A CN104140393 A CN 104140393A
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ester compound
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吴豫生
吴养洁
李新建
邹大鹏
郭瑞云
李敬亚
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ZHEJIANG TONGYUANKANG MEDICINE Co.,Ltd.
Zhengzhou tongyuankang Pharmaceutical Co.,Ltd.
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TETRANOV BIOPHARM Inc
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Abstract

本发明公开了一种芳环/芳杂环叔丁醇酯类化合物的制备方法,包括:1)搅拌条件下,将芳杂环硼酸酯类化合物或芳环硼酸类化合物、二碳酸二叔丁酯加入溶剂中,再加入钯催化剂和配体,得混合物A;2)将混合物A加热进行反应,后冷却至室温,得混合物B;3)将混合物B用乙酸乙酯稀释后,用硅藻土过滤,收集滤液,浓缩、旋干,即得。本发明的制备方法,实现了芳杂环硼酸酯类化合物或芳环硼酸类化合物的烷氧羰基化反应,直接生成芳环/芳杂环叔丁醇酯类化合物;原料无毒、廉价易得;催化体系成本低且具有良好的稳定性和广泛的适用性;反应条件温和,安全性高,易于控制;工艺简单,操作方便,环境友好,专一性强,适合工业化生产。

Description

一种芳环/芳杂环叔丁醇酯类化合物的制备方法
技术领域
本发明有机合成技术领域,具体涉及一种芳环/芳杂环叔丁醇酯类化合物的制备方法。
背景技术
芳环/芳杂环基酯及其衍生物是一类重要的药物中间体,广泛的存在于具有生物活性的化合物内,在药物合成中起着非常重要的作用,并且是芳环/芳杂环基羧酸重要的反应原料。目前有两种方法来合成芳环/芳杂环基酯及其衍生物,如下所示:
1.通过格氏试剂或锂试剂等金属试剂与羰基化试剂反应(E.Ghera,Y.Bendavid,J.Org.Chem.1988,53,2972-2979.b)D.Rausch,C.Lambert,Org.Lett.,2006,22,5037-5040.c)L.D.Bratton,H.Huh,R.A.Bartsch,J.Heterocycl.Chem.2000,37,815–819;H.Li,J.Balsells,Tetrahedron Lett.2008,49,2034–2037.b)J.C.J.Amedio,G.T.Lee,K.Prasad,O.Repic,Synth.Commun.1995,25,2599–2612.c).R.C.Larock,Comprehensive Organic Transformations:AGuide to Functional Group Preparations,2nd ed.;John Wiley&Sons:New York,1999.),化学反应式如式(1)所示:
2.通过钯催化的卤代芳烃与一氧化碳的偶联反应(Z.Xin,T.M.A.T.Lindhardt,T.Skrydstrup,Org.Lett.2011,13,284-287(b)C.Cai,N.R.Rivera,J.Balsells,R.R.Sidler,J.C.McWilliams,C.S.Shultz,Y.Sun,Org.Lett.2006,8,5161–5164.),化学反应式如式(2)所示:
但是,上述两种方法都存在如下局限性:金属化试剂较难制备,反应条件苛刻,且储存运输不方便,成本较高,不利于工业化生产;而钯催化的一氧化碳偶联反应,涉及到有毒气体原料一氧化碳的参与,反应较难控制,且安全性不高,环境不友好,同样不适用于工业化生产。
发明内容
本发明的目的是提供一种芳环/芳杂环叔丁醇酯类化合物的制备方法,解决现有制备方法反应条件苛刻、安全性低、成本高、不适合工业化生产的问题。
为了实现以上目的,本发明所采用的技术方案是:一种芳环/芳杂环叔丁醇酯类化合物的制备方法,包括下列步骤:
1)在搅拌条件下,将芳杂环硼酸酯类化合物或芳环硼酸类化合物、二碳酸二叔丁酯加入溶剂中,再加入钯催化剂和配体,得混合物A;
2)将步骤1)所得混合物A加热到60~110℃进行反应,反应13~17h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤,收集滤液,浓缩、旋干,即得。
步骤1)中,芳杂环硼酸酯类化合物或芳环硼酸类化合物与二碳酸二叔丁酯的摩尔比为0.6:1.2~2.2。
所述芳杂环硼酸酯类化合物为吡啶硼酸酯、喹啉硼酸酯、带有取代基的吡啶硼酸酯或带有取代基的喹啉硼酸酯;所述取代基为烯丙基、烷氧基、环丙基、腈基、N,N-二甲基、酯基、苯基或苄氧基。
所述吡啶硼酸酯为2-吡啶硼酸酯、3-吡啶硼酸醇酯或4-吡啶硼酸酯。所述带有取代基的吡啶硼酸酯为带有取代基的2-吡啶硼酸酯、带有取代基的3-吡啶硼酸醇酯或带有取代基的4-吡啶硼酸酯。
所述喹啉硼酸酯为4-喹啉硼酸酯。所述带有取代基的喹啉硼酸酯为带有取代基的4-喹啉硼酸酯。
所述烷氧基为碳原子数为1~10的烷氧基。所述酯基为碳原子数为1~10的酯基。
所述芳环硼酸类化合物为苯基硼酸或带有取代基的苯基硼酸;所述取代基为卤素、酯基、烷氧基或腈基。
所述烷氧基为碳原子数为1~10的烷氧基。所述酯基为碳原子数为1~10的酯基。
所述钯催化剂和配体的加入量为:芳杂环硼酸酯类化合物或芳环硼酸类化合物:钯催化剂:配体的摩尔比为0.6:0.03:0.03~0.12。
所述钯催化剂为氯化钯、三氟乙酸钯、醋酸钯、乙酰丙酮钯、三(二亚苄基丙酮)二钯中的任意一种;所述配体为三苯基膦、三环己基膦、BINAP[(±)-2,2’-双-(二苯膦基)-1,1’-联萘]、CyJohnPhos[2-(二环己基膦基)联苯]、DavePhos[2-双环己基膦-2’-(N,N-二甲基氨基)联苯]、Sphos(2-二环己基膦-2’,6’-二甲氧基-1,1’-联苯)、Xphos(2-二环己基膦-2’,4’,6’-三异丙基联苯)、RuPhos(2-二环己基膦-2’,6’-二异丙氧基-1,1’-联苯)、Xantphos(4,5-双二苯基膦-9,9-二甲基氧杂蒽)、DPPF[1,1’-双(二苯基膦)二茂铁]、JohnPhos[2-(二叔丁基膦)联苯]、2-MePh3P(2-甲基-三苯基膦)中的任意一种。
步骤1)中所述混合物A中还加入了促进剂;促进剂的加入量为:钯催化剂:促进剂的摩尔比为0.03:1.8;所述促进剂为碳酸钾、磷酸三钾、醋酸钾、碳酸钠、氟化铯、碳酸铯、叔丁醇钾中的任意一种。
步骤1)中所述溶剂为甲苯、二氧六环、四氢呋喃、乙二醇二甲醚、乙酸乙酯、1,2-二氯乙烷、二甲基亚砜、N,N-二甲基甲酰胺、N-甲基吡咯烷酮中的任意一种。
所述溶剂的用量为:每摩尔芳杂环硼酸酯类化合物或芳环硼酸类化合物用5L溶剂。
步骤3)中所述旋干后进行纯化处理;所述纯化处理是将旋干所得粗产品,以乙酸乙酯/石油醚=1:0.5~50为展开剂,进行柱色谱分离。
本发明的芳环/芳杂环叔丁醇酯类化合物的制备方法,涉及的化学反应式如(3)或(4)所示:
其中,Ar为芳杂环基或取代的芳杂环基;
其中,R为H、卤素、酯基、烷氧基或腈基。
本发明的芳环/芳杂环叔丁醇酯类化合物的制备方法,以芳杂环硼酸酯类化合物或芳环硼酸类化合物、二碳酸二叔丁酯为原料,以钯催化剂、配体为催化体系,实现了芳杂环硼酸酯类化合物或芳环硼酸类化合物的烷氧羰基化反应,直接生成芳环/芳杂环叔丁醇酯类化合物;原料无毒、适用性好、廉价易得;催化体系成本低且具有良好的稳定性和广泛的适用性;反应条件温和,安全性高,易于控制;工艺简单,操作方便,环境友好,专一性强,可以得到中等及高等的收率,适合工业化生产。
具体实施方式
下面结合具体实施方式对本发明作进一步的说明。
实施例1
本实施例的芳杂环叔丁醇酯类化合物为3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将3-吡啶硼酸酯(123mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到100mg目标产物,收率93%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ9.12(s,1H),8.69(d,J=4.6Hz,1H),8.19(d,J=8.0Hz,1H),7.31(dd,J=8.0,4.6Hz,1H),1.56(s,9H).13C NMR(100MHz,CDCl3,ppm):δ164.3(s),152.9(s),150.8(s),136.8(s),127.6(s),123.0(s)81.9(s),28.1(s)。
实施例2
本实施例的芳杂环叔丁醇酯类化合物为3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将3-吡啶硼酸酯(123mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol)、碳酸钾(248mg,1.8mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到70mg目标产物,收率65%。
实施例3~20的芳杂环叔丁醇酯类化合物为3-吡啶叔丁醇酯,结构式为:
制备方法同实施例2,所用原料名称及用量如表1、2所示,技术参数及产物收率如表3所示。
表1实施例3~20的制备方法所用反应物、溶剂名称及用量
表2实施例3~20的制备方法所用催化体系名称及用量
表3实施例3~20的制备方法的技术参数及产品收率
实施例21
本实施例的芳杂环叔丁醇酯类化合物为2-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将2-吡啶硼酸酯(123mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到70mg目标产物,收率66%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.71(d,J=4.8Hz,1H),8.01(d,J=7.8Hz,1H),7.77(td,J=7.8,1.7Hz,1H),7.39(ddd,J=7.8,4.8,1.2Hz,1H),1.60(s,9H).13C NMR(100MHz,CDCl3,ppm):δ164.2(s),149.7(s),149.5(s),136.8(s),126.3(s),124.7(s),82.2(s),28.0(s)。
实施例22
本实施例的芳杂环叔丁醇酯类化合物为5-烯丙基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将5-烯丙基-3-吡啶硼酸酯(147mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到73.8mg目标产物,收率56%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ9.00(s,1H),8.57(s,1H),8.09(s,1H),5.92(m,1H),5.13(m,2H),3.44(t,J=6.6Hz,2H),1.59(s,9H).13C NMR(100MHz,CDCl3,ppm):δ164.2(s),152.5(s),148.1(s),137.4(s),135.4(s),135.3(s),127.7(s),117.5(s),82.2(s),36.9(s),28.1(s).HRMS(ESI+)calcd for C13H18NO2(M+H)+220.1338,found220.1334。
实施例23
本实施例的芳杂环叔丁醇酯类化合物为5-乙氧基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将5-乙氧基-3-吡啶硼酸酯(149mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到119mg目标产物,收率89%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.70(d,J=1.6Hz,1H),8.37(d,J=2.8Hz,1H),7.65(dd,J=2.8,1.6Hz,1H),4.07(q,J=6.8Hz,2H),1.55(s,9H),1.40(t,J=6.8Hz,3H).13CNMR(100MHz,CDCl3,ppm):δ164.4(s),154.7(s),142.7(s),141.9(s),128.1(s),120.6(s),82.0(s),64.0(s),28.1(s),14.6(s).HRMS(ESI+)calcd for C12H18NO3(M+H)+224.1287,found224.1283。
实施例24
本实施例的芳杂环叔丁醇酯类化合物为5-环丙基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将5-环丙基-3-吡啶硼酸酯(147mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到83mg目标产物,收率63%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.90(s,1H),8.52(s,1H),7.82(s,1H),1.92(m,1H),1.57(s,9H),1.04(m,2H),0.7(m,2H).13C NMR(100MHz,CDCl3,ppm):δ164.5(s),151.2(s),147.5(s),139.4(s),133.4(s),127.4(s),82.0(s),28.1(s),12.8(s),9.31(s).HRMS(ESI+)calcd forC13H18NO2(M+H)+220.1338,found220.1334。
实施例25
本实施例的芳杂环叔丁醇酯类化合物为6-环丙基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将6-环丙基-3-吡啶硼酸酯(147mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到53mg目标产物,收率40%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.90(s,1H),8.52(s,1H),7.82(s,1H),1.92(m,1H),1.57(s,9H),1.04(m,2H),0.7(m,2H).13C NMR(100MHz,CDCl3,ppm):δ164.5(s),151.2(s),147.5(s),139.4(s),133.4(s),127.4(s),82.0(s),28.1(s),12.8(s),9.31(s).HRMS(ESI+)calcd forC13H18NO2(M+H)+220.1338,found220.1334。
实施例26
本实施例的芳杂环叔丁醇酯类化合物为6-腈基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将6-腈基-3-吡啶硼酸酯(138mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到53mg目标产物,收率43%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ9.22(d,J=1.43Hz,1H),8.37(dd,J=7.8,1.9Hz,1H),7.76(d,J=7.8Hz,1H),1.61(s,9H).13C NMR(100MHz,CDCl3,ppm):δ162.6(s),151.8(s),137.9(s),136.4(s),130.2(s),127.9(s),116.7(s),83.4(s),28.0(s)。
实施例27
本实施例的芳杂环叔丁醇酯类化合物为5-腈基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将5-腈基-3-吡啶硼酸酯(138mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到41mg目标产物,收率32%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ9.32(d,J=1.9Hz,1H),8.99(d,J=1.9Hz,1H),8.48(t,J=1.9Hz,1H),1.61(s,9H).13C NMR(100MHz,CDCl3,ppm):δ162.4(s),154.9(s),153.6(s),140.1(s),127.9(s),115.9(s),109.9(s),83.6(s),28.0(s)。
实施例28
本实施例的芳杂环叔丁醇酯类化合物为6-(N,N-二甲基)-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将6-(N,N-二甲基)-3-吡啶硼酸酯(148.8mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到45mg目标产物,收率35%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.75(d,J=2.1Hz,1H),7.94(dd,J=8.9,2.1Hz,1H),6.43(d,J=8.9Hz,1H),3.14(s,6H),1.55(s,9H).13C NMR(100MHz,CDCl3,ppm):δ165.5(s),160.6(s),150.9(s),138.0(s),115.2(s),104.3(s),80.2(s),38.0(s),28.3(s).HRMS(ESI+)calcd forC12H19N2O2(M+H)+223.1447,found223.1443。
实施例29
本实施例的芳杂环叔丁醇酯类化合物为3-叔丁基-5-乙基-3,5-二吡啶羧酸酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将5-乙酯基-3-吡啶硼酸酯(166.2mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到84mg目标产物,收率56%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ9.31(d,J=2.2Hz,1H),9.28(d,J=2.2Hz,1H),8.78(t,J=2.2Hz,1H),4.42(q,J=7.4Hz,2H),1.60(s,9H),1.40(t,J=7.4Hz,3H).13C NMR(100MHz,CDCl3,ppm):δ164.5(s),163.5(s),154.0(s),153.6(s),137.8(s),127.6(s),126.1(s),82.7(s),61.7(s),28.1(s),14.2(s).HRMS(ESI+)calcd for C13H18NO4(M+H)+252.1236,found252.1233。
实施例30
本实施例的芳杂环叔丁醇酯类化合物为3-叔丁基-6-甲基-3,6-二吡啶羧酸酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将6-甲酯基-3-吡啶硼酸酯(157.8mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到66mg目标产物,收率47%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ9.24(d,J=1.3Hz,1H),8.37(dd,J=8.1,1.9Hz,1H),7.51(d,J=8.1Hz,1H),4.03(s,3H),1.61(s,9H).13C NMR(100MHz,CDCl3,ppm):δ165.0(s),163.4(s),150.7(s),150.3(s),138.1(s),130.3(s),124.5(s),82.8(s),53.1(s),28.1(s)。
实施例31
本实施例的芳杂环叔丁醇酯类化合物为6-苄氧基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将6-苄氧基-3-吡啶硼酸酯(186mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到160mg目标产物,收率94%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.79(d,J=2.0Hz,1H),8.22(dd,J=8.7,2.0Hz,1H),7.45(m,2H),7.36(m,3H),6.79(d,J=8.7Hz,1H),5.43(s,2H),1.58(s,9H).13C NMR(100MHz,CDCl3,ppm):δ165.9(s),164.6(s),149.7(s),139.6(s),136.7(s),128.5(s),128.0(s),128.0(s),121.5(s),110.7(s),81.3(s),68.1(s),28.2(s).HRMS(ESI+)calcd for C17H20NO3(M+H)+286.1443,found286.1441。
实施例32
本实施例的芳杂环叔丁醇酯类化合物为4-喹啉叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将4-喹啉硼酸酯(153mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到64mg目标产物,收率47%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.99(d,J=4.5Hz,1H),8.70(d,J=8.5Hz,1H),8.15(d,J=8.5Hz,1H),7.80(d,J=4.5Hz,1H),7.75(m,1H),7.64(m,1H),1.68(s,9H).13CNMR(100MHz,CDCl3,ppm):δ165.7(s),149.8(s),149.1(s),137.0(s),136.3(s),129.9(s),129.5(s),127.8(s),125.5(s),121.7(s),82.9(s),28.2(s).HRMS(ESI+)calcd for C14H16NO2(M+H)+230.1181,found230.1177。
实施例33
本实施例的芳杂环叔丁醇酯类化合物为6-苯基-3-吡啶叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将6-苯基-3-吡啶硼酸酯(168mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到70mg目标产物,收率45%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,DMSO,ppm):δ8.86(d,J=4.6Hz,1H),8.24(s,1H),8.11(d,J=6.4Hz,2H),7.74(dd,J=4.6,1.7Hz,1H),7.51(m,3H),1.59(s,9H).13C NMR(100MHz,DMSO,ppm):δ163.7(s),157.1(s),150.6(s),139.7(s),137.8(s),129.5(s),128.9(s),126.6(s),121.1(s),118.6(s),82.2(s),27.6(s)。
实施例34
本实施例的芳环叔丁醇酯类化合物为苯基叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将苯基硼酸(73.2mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到71mg目标产物,收率66%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.00(m,2H),7.51(t,J=7.4Hz,1H),7.40(t,J=7.4Hz,2H),1.60(s,9H).13C NMR(100MHz,CDCl3,ppm):δ165.7(s),132.4(s),132.0(s),129.4(s),128.1(s),80.9(s),28.1(s)。
实施例35
本实施例的芳环叔丁醇酯类化合物为对甲氧基苯甲酸叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将甲氧基苯基硼酸(91.2mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到87mg目标产物,收率70%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ7.93(d,J=7.49Hz,2H),6.88(d,J=7.49Hz,2H),3.84(s,3H),1.57(s,9H).13C NMR(100MHz,CDCl3,ppm):δ165.6(s),162.9(s),131.3(s),124.5(s),113.3(s),80.5(s),55.3(s),28.2(s)。
实施例36
本实施例的芳环叔丁醇酯类化合物为对间氟苯甲酸叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将间氟苯基硼酸(83.4mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到47mg目标产物,收率40%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ7.77(d,J=7.5Hz,1H),7.65(d,J=9.0Hz,1H),7.38(m,1H),7.21(td,J=8.0,1.7Hz,1H),1.59(s,9H).13C NMR(100MHz,CDCl3,ppm):δ164.5(d,J=2.9Hz),163.7,161.3(d,J=248Hz),134.2(d,J=6.1Hz),129.7(d,J=6.1Hz),125.1(d,J=2.9Hz),119.4(d,J=21.4Hz),116.3(d,J=23.2Hz),81.5(s),28.1(s)。
实施例37
本实施例的芳环叔丁醇酯类化合物为叔丁基,甲基对苯甲酸酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将对甲酯基苯基硼酸(107.9mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到59mg目标产物,收率42%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.04(m,4H),3.93(s,3H),1.59(s,9H).13C NMR(100MHz,CDCl3,ppm):δ166.4(s),164.8(s),135.8(s),133.4(s),129.3(s),129.3(s),81.7(s),52.3(s),28.1(s)。
实施例38
本实施例的芳环叔丁醇酯类化合物为对腈基苯甲酸叔丁醇酯,结构式为:
制备方法包括下列步骤:
1)将3ml二氧六环置于干燥的反应器中,在搅拌条件下,将对腈基苯基硼酸(87.6mg,0.6mmol)、二碳酸二叔丁酯(261.6mg,1.2mmol)加入二氧六环中,再加入醋酸钯(6.7mg,0.03mmol)、三苯基膦(23.5mg,0.09mmol),得混合物A;
2)在油浴条件下,将步骤1)所得混合物A加热到100℃进行反应,反应15h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤并用乙酸乙酯洗涤,收集滤液,浓缩、旋干,得粗产品;将所得粗产品以乙酸乙酯/石油醚=1:10为展开剂,进行柱色谱分离,得到50mg目标产物,收率40%。
对本实施例所得目标产物进行核磁表征,结果如下:
1H NMR(400MHz,CDCl3,ppm):δ8.07(d,J=8.1Hz,2H),7.71(d,J=8.1Hz,2H),1.60(s,9H).13C NMR(100MHz,CDCl3,ppm):δ164.0(s),135.8(s),132.0(s),129.9(s),118.1(s),115.8(s),82.3(s),28.0(s)。

Claims (10)

1.一种芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:包括下列步骤:
1)在搅拌条件下,将芳杂环硼酸酯类化合物或芳环硼酸类化合物、二碳酸二叔丁酯加入溶剂中,再加入钯催化剂和配体,得混合物A;
2)将步骤1)所得混合物A加热到60~110℃进行反应,反应13~17h后冷却至室温,得混合物B;
3)将步骤2)所得混合物B用乙酸乙酯稀释后,用硅藻土过滤,收集滤液,浓缩、旋干,即得。
2.根据权利要求1所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:步骤1)中,芳杂环硼酸酯类化合物或芳环硼酸类化合物与二碳酸二叔丁酯的摩尔比为0.6:1.2~2.2。
3.根据权利要求1或2所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:所述芳杂环硼酸酯类化合物为吡啶硼酸酯、喹啉硼酸酯、带有取代基的吡啶硼酸酯或带有取代基的喹啉硼酸酯;所述取代基为烯丙基、烷氧基、环丙基、腈基、N,N-二甲基、酯基、苯基或苄氧基。
4.根据权利要求1或2所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:所述芳环硼酸类化合物为苯基硼酸或带有取代基的苯基硼酸;所述取代基为卤素、酯基、烷氧基或腈基。
5.根据权利要求1所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:步骤1)中,所述钯催化剂和配体的加入量为:芳杂环硼酸酯类化合物或芳环硼酸类化合物:钯催化剂:配体的摩尔比为0.6:0.03:0.03~0.12。
6.根据权利要求1或5所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:所述钯催化剂为氯化钯、三氟乙酸钯、醋酸钯、乙酰丙酮钯、三(二亚苄基丙酮)二钯中的任意一种;所述配体为三苯基膦、三环己基膦、BINAP、CyJohnPhos、DavePhos、SPhos、XPhos、RuPhos、Xantphos、DPPF、JohnPhos、2-MePh3P中的任意一种。
7.根据权利要求1所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:步骤1)中所述混合物A中还加入了促进剂;促进剂的加入量为:钯催化剂:促进剂的摩尔比为0.03:1.8;所述促进剂为碳酸钾、磷酸三钾、醋酸钾、碳酸钠、氟化铯、碳酸铯、叔丁醇钾中的任意一种。
8.根据权利要求1所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:步骤1)中所述溶剂为甲苯、二氧六环、四氢呋喃、乙二醇二甲醚、乙酸乙酯、1,2-二氯乙烷、二甲基亚砜、N,N-二甲基甲酰胺、N-甲基吡咯烷酮中的任意一种。
9.根据权利要求1或7所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:所述溶剂的用量为:每摩尔芳杂环硼酸酯类化合物或芳环硼酸类化合物用5L溶剂。
10.根据权利要求1所述的芳环/芳杂环叔丁醇酯类化合物的制备方法,其特征在于:步骤3)中所述旋干后进行纯化处理;所述纯化处理是将旋干所得粗产品,以乙酸乙酯/石油醚=1:0.5~50为展开剂,进行柱色谱分离。
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