CN112010882B - 立体选择性制备3,5-双取代环己烯类化合物的方法及应用 - Google Patents

立体选择性制备3,5-双取代环己烯类化合物的方法及应用 Download PDF

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CN112010882B
CN112010882B CN201910470693.3A CN201910470693A CN112010882B CN 112010882 B CN112010882 B CN 112010882B CN 201910470693 A CN201910470693 A CN 201910470693A CN 112010882 B CN112010882 B CN 112010882B
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阴国印
庞海亮
吴冬
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Abstract

本发明公开了一种立体选择性制备1,3‑双取代环己烷类化合物的方法及应用。所述1,3‑双取代环己烷类化合物的结构式为
Figure DDA0002080749520000011
所述方法包括:在金属钯类催化剂PdA、碱和添加剂作用下,将1,4‑环己二烯、芳基卤代物R1‑X与联硼酸频哪醇酯溶于有机溶剂中并进行反应,经柱层析分离纯化得到上述结构的1,3‑双取代环己烷类化合物。本发明方法可高效合成上述结构的1,3‑双取代环己烷类化合物,具有优秀的区域选择性和立体选择性,且产物中含有硼基团,可应用于进一步进行立体专一性转化,从而产生各种高度官能团化的环己烷类化合物,为合成复杂药物分子及药物先导化合物提供了新方法。

Description

立体选择性制备3,5-双取代环己烯类化合物的方法及应用
技术领域
本发明属于有机合成领域,具体涉及一种立体选择性制备3,5-双取代环己烯类化合物的方法及应用。
背景技术
1,3-双取代的环己烷类有机化合物广泛存在于天然产物及药物分子中[a)L.S.Melvin,M.R.Johnson,C.A.Harbert,G.M.Milne,A.Weissman,J.Med.Chem.1984,27,67-71;b)R.M.Soll,L.G.Humber,D.Deininger,A.A.Asselin,T.T.Chau,B.M.Weichman,J.Med.Chem.1986,29,1457-1460;c)S.Tsuchiya,N.Yasuda,T.Matsumoto,K.Hiratsuka,H.Iizuka,A.Hukuzaki,K.Matsunaga,WO 97/15549A1,1997;d)J.L.Wiley,I.D.Beletskaya,E.W.Ng,Z.M.Dai,P.J.Crocker,A.Mahadevan,R.K.Razdan,B.R.Martin,J.Pharmacol.Exp.Ther.2002,301,679-689;e)J.W.Huffman,A.L.Thompson,J.L.Wiley,B.R.Martin,Bioorg.Med.Chem.2008,16,322-335;f)P.Kare,J.Bhat,M.E.Sobhia,MolDivers 2013,17,111-122;g)P.T.W.Cheng,D.S.Yoon,WO 2016/040225 A1,2016]。
目前,合成1,3-双取代的环己烷类有机化合物的通用方法(如附图1):芳基试剂先对环己烯酮进行1,4-加成反应,其次对羰基进行还原得到目标化合物[a)J.W.Huffman,A.L.Thompson,J.L.Wiley,B.R.Martin,Bioorg.Med.Chem.2008,16,322-335;b)H.Tajuddin,L.Shukla,A.C.Maxwell,T.B.Marder,P.G.Steel,Org.Lett.2010,12,5700-5703;c)S.Llona-Minguez,S.P.Mackay,Beilstein J.Org.Chem.2014,10,1333-1338;d)L.M.Martinez-Prieto,A.Ferry,L.Rakers,C.Richter,P.Lecante,K.Philippot,B.Chaudret,F.Glorius,Chem.Commun.2016,52,4768-4771]。尽管芳基试剂可以对环己烯酮高选择性的进行1,4-加成反应,但随后环己酮的还原反应,目前还无法控制其非对映体选择性,导致合成的环己烷类化合物存在顺反两种构型,不易分离,而且得到的1,3-双取代环己烷化合物结构单一,不符合化学合成的多样性,无法满足现代高通量药物筛选的需求。
Figure GDA0003168105470000021
因此,一种更为可行的思路是通过研究寻找一种具有高区域选择性和非对映选择性并且能高效合成1,3-双取代的环己烷类有机化合物方法。
发明内容
本发明的目的之一在于提供一种立体选择性制备3,5-双取代环己烯类化合物的方法,该方法操作简便,原料廉价易得,底物官能团兼容性好,具有优秀的区域选择性和非对映体选择性。
本发明的目的之二在于提供上述立体选择性制备3,5-双取代环己烯类化合物的方法的应用,应用于进行立体专一性转化,产生各种高度官能团化的环己烷类化合物,为合成复杂药物分子及药物先导化合物提供了新方法。
本发明实现上述目的之一采用以下技术方案:
一种立体选择性制备3,5-双取代环己烯类化合物的方法,所述3,5-双取代环己烯类化合物的结构式如下:
Figure GDA0003168105470000022
所述立体选择性制备上述结构式的3,5-双取代环己烯类化合物的方法包括以下步骤:在金属钯类催化剂PdA、碱和添加剂作用下,将1,4-环己二烯、取代或未取代芳基卤代物R1-X与联硼酸频哪醇酯溶于有机溶剂中并进行反应,经柱层析分离纯化得到上述结构的3,5-双取代环己烯类化合物;
所述方法合成路线如下:
Figure GDA0003168105470000023
所述R1为取代或未取代芳基,所述的取代芳基上的的取代基为任意以下结构的一种或几种:卤素、羟基、巯基、烷氧基、酚氧基、烷硫基、酚硫基、烷基取代的酰基、芳基取代的酰基、烷氧基取代的酰基、酚氧基取代的酰基、烷基取代的硫代羰基、芳基取代的硫代羰基、烷氧基取代的硫代羰基、酚氧基取代的硫代羰基、烷基或者芳基取代的酰胺基、烷基或者芳基取代的酯基、烷基或者芳基取代的硫酯基、烷基或者芳基取代的碳酸酯基、烷基或者芳基取代的硫代碳酸酯基、氰基、异氰基、硝基、亚硝基、烷基或者芳基取代的偶氮、重氮、叠氮、烷基或者芳基取代的胺、烷基或者芳基取代的亚胺、烷基或者芳基取代的烯胺、烷基或者芳基取代的膦、烷基或者芳基取代的亚磷酸酯、烷基或者芳基取代的亚磷酰胺、烷基或者芳基取代的磷酸酯、烷基或者芳基取代的磷酰胺、硼烷、烷基或者芳基取代的硼烷、硼酸、硼酸酯、硼酸盐、硅烷、烷基取代的硅烷、烷氧基取代的硅烷、酚氧基取代的硅烷、卤素取代的硅烷,或者是取代的链状或者环状的烷烃、含氟烷烃、烯烃、芳烃、芳杂环结构单元,或者是含氧、氮、硫、膦的C3-C12的杂环;所述X为原子溴或者碘。
所述上述结构式的3,5-双取代环己烯类化合物的制备方法具体步骤如下:
在惰性气体中,将金属钯类催化剂PdA、碱、添加剂和联硼酸频哪醇酯溶于干燥的有机溶剂中,然后加入1,4-环己二烯和芳基卤代物R1-X,得到反应混合物,随后将上述反应混合物密封并从惰性气体中取出,反应完全后,减压浓缩除去有机溶剂,再经柱层析分离纯化得到目标产物3,5-双取代环己烯类化合物
Figure GDA0003168105470000031
其中,金属钯类催化剂PdA:碱:添加剂:1,4-环己二烯:芳基卤代物R1-X:联硼酸频哪醇酯:有机溶剂的用量比为摩尔:摩尔:摩尔:摩尔:摩尔:摩尔:体积mL=0.05:2:1:3:1:1:2。
所述的金属钯类催化剂PdA中,A为Cl、[CH3COO]、[CF3COO]、[acac]、PPh3、二亚苄基丙酮中的任一种。
所述的碱,其阳离子为Li+、Na+、K+和Cs+中的任一种,阴离子为F、CO3 2–、HCO3 、PO4 3–、HPO4 2–、H2PO4 、OH、[CH3COO]、[CF3COO]、[OMe]和[OtBu]中的任一种。
所述的添加剂,其阳离子为Li+、Na+、K+、Cs+、Mg2+、Ca2+、Cu+、Cu2+、Zn2+,Ag+、[(CnH2n+1)4N]+中的任一种,阴离子为F、Cl、Br、I、BF4 、NO2 、NO3 、SO3 2–、SO4 2–中的任一种;其中,所述n为1到8之间的任意整数。
所述的有机溶剂为甲醇、乙醇、异丙醇、四氢呋喃、2-甲基四氢呋喃、1,4-二氧六环、乙醚、甲基叔丁基醚、乙二醇二甲醚、N-甲基吡咯烷酮、N,N-二甲基甲酰胺、N,N-二甲基乙酰胺、二甲基亚砜、二氯甲烷、1,2-二氯乙烷、氯仿、四氯化碳、苯、甲苯、二甲苯、三甲苯、氯苯、1,2-二氯苯、丙酮、乙腈、C3-C12的饱和烷基腈中的一种或几种。
本发明实现目的之二采用以下技术方案:
一种所述立体选择性制备3,5-双取代环己烯类化合物的方法的应用,其特征在于:应用于进行立体专一性转化,产生高度官能团化的环己烷类化合物,所述应用包括以下步骤:
将所述3,5-双取代环己烯类化合物
Figure GDA0003168105470000041
在NaOH和H2O2作用下,在四氢呋喃溶剂中继续进行反应,制得高度官能团化的3,5-双取代环己烯类化合物
Figure GDA0003168105470000042
所述应用的路线如下:
Figure GDA0003168105470000043
所述应用具体步骤如下:
1)在惰性气体中,将金属钯类催化剂PdA、碱、添加剂和联硼酸频哪醇酯溶于干燥的有机溶剂中,然后加入1,4-环己二烯和芳基卤代物R1-X,得到反应混合物,随后将上述反应混合物密封并从惰性气体中取出,反应完全后得到反应液Ⅰ;
2)将所述反应液Ⅰ用硅藻土过滤,然后用乙酸乙酯洗涤并浓缩,将得到的浓缩混合物溶于四氢呋喃中,得到反应液Ⅱ,然后在0℃下,向反应液Ⅱ中加入一定量的2M NaOH水溶液和30%H2O2溶液,然后将反应温度升至室温,并搅拌均一,待反应结束后,用饱和Na2S2O3淬灭,再用乙酸乙酯萃取,然后合并有机层并减压浓缩除去溶剂,再经柱层析分离纯化得到目标产物
Figure GDA0003168105470000051
其中,金属钯类催化剂PdA:碱:添加剂:1,4-环己二烯:芳基卤代物R1-X:联硼酸频哪醇酯:有机溶剂:四氢呋喃:2M NaOH水溶液:30%H2O2溶液的用量比为摩尔:摩尔:摩尔:摩尔:摩尔:摩尔:体积mL:体积mL:体积mL:体积mL=0.05:2:1:3:1:1:2:10:6:3。
与现有技术相比,本发明具有以下有益效果:
本发明公开的立体选择性制备3,5-双取代环己烯类化合物的方法,使用1,4-环己二烯,芳基卤代物和联硼酸频哪醇酯,在金属钯催化剂作用下,一锅法反应制备顺式3,5-双取代环己烯类有机化合物,该反应方法不但可以高效的合成目标化合物,而且底物适用性强,具有优秀的区域选择性和立体选择性,此方法所使用的原料廉价易得,操作简便,底物官能团兼容性好,可以高效的合成环己烯-3,5-芳硼化产物。
同时,本发明所述方法的应用,上述立体选择性制备3,5-双取代环己烯类化合物的方法合成的产物中含有硼基团,其可以进一步进行立体专一性转化,目标化合物进行进一步立体选择性转化,简单高效的合成其它官能团化的3,5-双取代环己烯类有机化合物,为合成复杂药物分子及药物先导化合物提供了新方法。
具体实施方式
通过以下详细说明结合附图可以进一步理解本发明的特点和优点。所提供的实施例仅是对本发明方法的说明,而不以任何方式限制本发明揭示的其余内容。
下述实施例中,具体操作未涉及温度的,均是指室温下进行。
RT是指室温。B2pin2是指联硼酸频哪醇酯,结构式为
Figure GDA0003168105470000052
Pd(acac)2是指二(乙酰丙酮)钯。NaOAc是指乙酸钠,Me4NCl是指四甲基氯化铵。CHCl3是指氯仿。THF是指四氢呋喃。
【实施例1】
Figure GDA0003168105470000061
在充满氩气的手套箱中,将二(乙酰丙酮)钯(7.6mg,0.025mmol)、乙酸钠(82.0mg,1.0mmol)、四甲基氯化铵(54.8mg,0.5mmol)、联硼酸频哪醇酯(127mg,0.5mmol)和4-氰基碘苯(114.5mg,0.5mmol)溶于1mL干燥的氯仿溶剂中,然后加入1,4-环己二烯(142μL,1.5mmol),将反应管密封并从手套箱中取出,在60℃下反应24小时。反应结束后,减压浓缩除去反应溶剂,柱层析分离纯化得到cis-3'-(4,4,5,5-四甲基-1,3,2-二氧硼杂环戊烷-2-基)-1',2',3',6'-四氢-[1,1'-联苯]-4-甲腈(无色油,产率50%)。1H NMR(400 MHz,Chloroform-d)δ7.57(d,J=7.9Hz,2H),7.32(d,J=7.9Hz,2H),5.81-5.74(m,2H),2.91-2.73(m,1H),2.29-2.09(m,2H),2.07-1.92(m,2H),1.75-1.65(m,1H),1.23(s,12H)ppm;13CNMR(101MHz,Chloroform-d)δ153.1,132.3,127.9,127.4,125.4,119.3,109.8,83.5,41.2,32.8,31.3,24.9ppm;HRMS(ESI)calculated for C19H24BNNaO2[M+Na]+:332.1792,found332.1820.
【实施例2】
Figure GDA0003168105470000062
在充满氩气的手套箱中,将二(乙酰丙酮)钯(7.6mg,0.025mmol)、乙酸钠(82.0mg,1.0mmol)、四甲基氯化铵(54.8mg,0.5mmol)、联硼酸频哪醇酯(127mg,0.5mmol)和3-氯-4-碘苯胺(126.7mg,0.5mmol)溶于1mL干燥的氯仿溶剂中,然后加入1,4-环己二烯(142μL,1.5mmol),将反应管密封并从手套箱中取出,在60℃下反应24小时。反应结束后,减压浓缩除去反应溶剂,柱层析分离纯化得到cis-2-氯-3'-(4,4,5,5-四甲基-1,3,2-二氧硼杂环戊烷-2-基)-1',2',3',6'-四氢-[1,1'-联苯基]-4-胺(白色固体,产率84%)。1H NMR(400MHz,Chloroform-d)δ7.02(d,J=8.3Hz,1H),6.68(d,J=2.4Hz,1H),6.54(dd,J=8.3,2.4Hz,1H),5.82-5.72(m,2H),3.62(s,2H),3.22-3.08(m,1H),2.30-2.18(m,1H),2.10-2.00(m,2H),1.98-1.91(m,1H),1.64(q,J=12.0Hz,1H),1.24(s,12H)ppm;13C NMR(101MHz,Chloroform-d)δ145.2,134.1,134.0,127.9,127.1,126.3,115.7,114.1,83.3,36.0,31.9,30.8,24.8,24.8ppm;HRMS(ESI)calculated for C18H26BClNO2[M+H]+:334.1740,found334.1765.
【实施例3】
Figure GDA0003168105470000071
在充满氩气的手套箱中,将二(乙酰丙酮)钯(7.6mg,0.025mmol)、乙酸钠(82.0mg,1.0mmol)、四甲基氯化铵(54.8mg,0.5mmol)、联硼酸频哪醇酯(127mg,0.5mmol)和4-碘联苯(140mg,0.5mmol)溶于1mL干燥的氯仿溶剂中,然后加入1,4-环己二烯(142μL,1.5mmol),将反应管密封并从手套箱中取出,在60℃下反应24小时。反应结束后,减压浓缩除去反应溶剂,柱层析分离纯化得到4,4,5,5-四甲基-2-(cis-1,2,3,6-四氢-[1,1':4',1”-三联苯]-3-基)-1,3,2-二氧杂硼烷(白色固体,产率62%)。1H NMR(400MHz,Chloroform-d)δ7.60(d,J=7.6Hz,2H),7.55(d,J=8.0Hz,2H),7.45(t,J=7.5Hz,2H),7.34(t,J=7.4Hz,3H),5.87-5.81(m,2H),2.88-2.82(m,1H),2.37-2.22(m,2H),2.09(d,J=8.2Hz,2H),1.78(q,J=13.2Hz,1H),1.27(s,12H)ppm;13C NMR(101MHz,Chloroform-d)δ146.7,141.3,139.0,128.8,127.5,127.3,127.2,127.1,127.1,126.2,83.4,40.6,33.1,31.9,24.9,24.9ppm;HRMS(ESI)calculated for C24H29BNaO2[M+Na]+:383.2153,found 383.2161.
【实施例4】
Figure GDA0003168105470000072
在充满氩气的手套箱中,将二(乙酰丙酮)钯(7.6mg,0.025mmol)、乙酸钠(82.0mg,1.0mmol)、四甲基氯化铵(54.8mg,0.5mmol)、联硼酸频哪醇酯(127mg,0.5mmol)和4-碘苯甲醚(117.0mg,0.5mmol)溶于1mL干燥的氯仿溶剂中,然后加入1,4-环己二烯(142μL,1.5mmol),将反应管密封并从手套箱中取出,在60℃下反应24小时。反应结束后,减压浓缩除去反应溶剂,柱层析分离纯化得到cis-4'-甲氧基-1,2,3,6-四氢-[1,1'-联苯]-3-基)-4,4,5,5-四甲基-1,3,2-二氧杂硼杂环戊烷(白色固体,产率67%)。1H NMR(400MHz,Chloroform-d)δ7.23–7.17(m,2H),6.92–6.86(m,2H),5.88–5.79(m,2H),3.82(s,3H),2.85–2.70(m,1H),2.33–2.15(m,2H),2.14–2.01(m,2H),1.80–1.67(m,1H),1.29(s,12H)ppm;13C NMR(101MHz,Chloroform-d)δ157.8,139.6,127.8,127.1,126.2,113.7,83.2,55.2,40.0,33.3,32.0,24.8,24.8ppm.HRMS(ESI)calculated for C19H27BNaO3[M+Na]+:337.1945,found 337.1951.
【实施例5】
Figure GDA0003168105470000081
在充满氩气的手套箱中,将二(乙酰丙酮)钯(7.6mg,0.025mmol)、乙酸钠(82.0mg,1.0mmol)、四甲基氯化铵(54.8mg,0.5mmol)、联硼酸频哪醇酯(127mg,0.5mmol)和对碘苯甲酸甲酯(140mg,0.5mmol)溶于1mL干燥的氯仿溶剂中,然后加入1,4-环己二烯(142μL,1.5mmol),将反应管密封并从手套箱中取出,在60℃下反应24小时。反应结束后,将反应液用硅藻土过滤,用乙酸乙酯洗涤并浓缩,将得到的混合物溶于5mL四氢呋喃中,然后在0℃下,向反应液中加入3.0mL 2M的NaOH水溶液和1.5mL 30%H2O2溶液,将反应温度升至室温,搅拌2-3小时,待反应结束后,用饱和Na2S2O3淬灭,用30mL乙酸乙酯分三次萃取,合并有机层并减压浓缩,柱层析分离纯化得到cis-3'-羟基-1',2',3',6'-四氢-[1,1'-联苯]-4-羧酸甲酯(白色固体,产率82%)。1H NMR(400MHz,Chloroform-d)δ8.00(d,J=8.4Hz,2H),7.30(d,J=8.2Hz,2H),5.88-5.82(m,1H),5.82-5.76(m,1H),4.50(s,1H),3.92(s,3H),3.08-2.90(m,1H),2.37-2.23(m,2H),2.23-2.04(m,2H),1.85-1.69(m,1H)ppm;13C NMR(101MHz,Chloroform-d)δ167.2,151.0,131.3,130.0,128.3,128.2,126.9,68.3,52.2,39.4,39.1,33.5ppm;HRMS(ESI)calculated for C14H16NaO3[M+Na]+:255.0992,found.255.0993.
【实施例6】
Figure GDA0003168105470000091
在充满氩气的手套箱中,将二(乙酰丙酮)钯(7.6mg,0.025mmol)、乙酸钠(82.0mg,1.0mmol)、四甲基氯化铵(54.8mg,0.5mmol)、联硼酸频哪醇酯(127mg,0.5mmol)和4-碘苯乙酮(123.0mg,0.5mmol)溶于1mL干燥的氯仿溶剂中,然后加入1,4-环己二烯(142μL,1.5mmol),将反应管密封并从手套箱中取出,在60℃下反应24小时。反应结束后,将反应液用硅藻土过滤,用乙酸乙酯洗涤并浓缩,将得到的混合物溶于5mL四氢呋喃中,然后在0℃下,向反应液中加入3.0mL 2M的NaOH水溶液和1.5mL 30%H2O2溶液,将反应温度升至室温,搅拌2-3小时,待反应结束后,用饱和Na2S2O3淬灭,用30mL乙酸乙酯分三次萃取,合并有机层并减压浓缩,柱层析分离纯化得到1-(cis-3'-羟基-1',2',3',6'-四氢-[1,1'-联苯]-4-基)乙-1-酮(白色固体,产率82%)。1H NMR(400MHz,Chloroform-d)δ7.91(d,J=8.4Hz,2H),7.31(d,J=8.2Hz,2H),5.89-5.81(m,1H),5.81-5.74(m,1H),4.58-4.42(m,1H),3.07-2.90(m,1H),2.59(s,3H),2.37-2.22(m,2H),2.22-2.04(m,1H),1.85(d,J=6.4Hz,1H),1.80-1.71(m,1H)ppm;13C NMR(101MHz,Chloroform-d)δ198.0,151.3,135.6,131.3,128.9,128.3,127.1,68.3,39.4,39.1,33.5,26.7ppm;HRMS(ESI)calculated for C14H16NaO2[M+Na]+:239.1043,found 239.1043.
以下【实施例7】-【实施例27】均以上述【实施例1】-【实施例6】的方法步骤进行,合成得到的化合物结构和名称、NMR与HRMS数据及产率如下表所示:
Figure GDA0003168105470000092
Figure GDA0003168105470000101
Figure GDA0003168105470000111
Figure GDA0003168105470000121
Figure GDA0003168105470000131
Figure GDA0003168105470000141

Claims (4)

1.一种立体选择性制备3,5-双取代环己烯类化合物的方法,其特征在于:
所述3,5-双取代环己烯类化合物的结构式如下:
Figure FDA0003216991400000011
所述立体选择性制备上述结构式的3,5-双取代环己烯类化合物的方法包括以下步骤:在二(乙酰丙酮)钯、乙酸钠和四甲基氯化铵作用下,将1,4-环己二烯、取代或未取代芳基卤代物R1-X与联硼酸频哪醇酯溶于氯仿中并进行反应,经柱层析分离纯化得到上述结构的3,5-双取代环己烯类化合物;
所述方法合成路线如下:
Figure FDA0003216991400000012
所述R1为取代或未取代芳基,所述的取代芳基上的取代基为任意以下结构的一种或几种:卤素、羟基、烷氧基、烷基或芳基取代的酰基、烷基或芳基取代的酰胺基、烷基或芳基取代的胺酰基、烷基或者芳基取代的酯基、氰基;所述X为原子溴或者碘。
2.如权利要求1所述的立体选择性制备3,5-双取代环己烯类化合物的方法,其特征在于:所述上述结构式的3,5-双取代环己烯类化合物的制备方法具体步骤如下:
在惰性气体中,将二(乙酰丙酮)钯、乙酸钠和四甲基氯化铵和联硼酸频哪醇酯溶于干燥的氯仿中,然后加入1,4-环己二烯和取代或未取代芳基卤代物R1-X,得到反应混合物,随后将上述反应混合物密封并从惰性气体中取出,反应完全后,减压浓缩除去氯仿,再经柱层析分离纯化得到目标产物3,5-双取代环己烯类化合物
Figure FDA0003216991400000013
其中,二(乙酰丙酮)钯:乙酸钠:四甲基氯化铵:1,4-环己二烯:取代或未取代的芳基卤代物R1-X:联硼酸频哪醇酯:氯仿的用量比为摩尔:摩尔:摩尔:摩尔:摩尔:摩尔:体积mL=0.05:2:1:3:1:1:2。
3.一种如权利要求1~2任一项所述立体选择性制备3,5-双取代环己烯类化合物的方法的应用,其特征在于:根据权利要求1~2任一项所述的方法制备3,5-双取代环己烯类化合物
Figure FDA0003216991400000021
在NaOH和H2O2作用下,在四氢呋喃溶剂中继续进行反应,制得顺式3,5-双取代环己烯类化合物
Figure FDA0003216991400000022
所述应用的路线如下:
Figure FDA0003216991400000023
4.如权利要求3所述立体选择性制备3,5-双取代环己烯类化合物的方法的应用,其特征在于:具体步骤如下:
1)在惰性气体中,将二(乙酰丙酮)钯、乙酸钠、四甲基氯化铵和联硼酸频哪醇酯溶于干燥的氯仿中,然后加入1,4-环己二烯和取代或未取代芳基卤代物R1-X,得到反应混合物,随后将上述反应混合物密封并从惰性气体中取出,反应完全后得到反应液Ⅰ;
2)将所述反应液Ⅰ用硅藻土过滤,然后用乙酸乙酯洗涤并浓缩,将得到的浓缩混合物溶于四氢呋喃中,得到反应液Ⅱ,然后在0℃下,向反应液Ⅱ中加入一定量的2M NaOH水溶液和30%H2O2溶液,然后将反应温度升至室温,并搅拌均一,待反应结束后,用饱和Na2S2O3淬灭,再用乙酸乙酯萃取,然后合并有机层并减压浓缩除去溶剂,再经柱层析分离纯化得到目标产物
Figure FDA0003216991400000024
其中,二(乙酰丙酮)钯:乙酸钠:四甲基氯化铵:1,4-环己二烯:芳基卤代物R1-X:联硼酸频哪醇酯:氯仿:四氢呋喃:2M NaOH水溶液:30%H2O2溶液的用量比为摩尔:摩尔:摩尔:摩尔:摩尔:摩尔:体积mL:体积mL:体积mL:体积mL=0.05:2:1:3:1:1:2:10:6:3。
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