CN112028756B - 一种2-苄基苯甲醛衍生物的合成方法 - Google Patents
一种2-苄基苯甲醛衍生物的合成方法 Download PDFInfo
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- QDMCHWCVLPVAES-UHFFFAOYSA-N 2-benzylbenzaldehyde Chemical class O=CC1=CC=CC=C1CC1=CC=CC=C1 QDMCHWCVLPVAES-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000001308 synthesis method Methods 0.000 title description 4
- BTFQKIATRPGRBS-UHFFFAOYSA-N o-tolualdehyde Chemical compound CC1=CC=CC=C1C=O BTFQKIATRPGRBS-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000001431 2-methylbenzaldehyde Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000010189 synthetic method Methods 0.000 claims abstract description 4
- 239000003570 air Substances 0.000 claims description 19
- 239000002808 molecular sieve Substances 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 19
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical group FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 claims description 18
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 10
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- DILRJUIACXKSQE-UHFFFAOYSA-N n',n'-dimethylethane-1,2-diamine Chemical group CN(C)CCN DILRJUIACXKSQE-UHFFFAOYSA-N 0.000 claims 1
- KVKFRMCSXWQSNT-UHFFFAOYSA-N n,n'-dimethylethane-1,2-diamine Chemical compound CNCCNC KVKFRMCSXWQSNT-UHFFFAOYSA-N 0.000 abstract description 16
- 125000000524 functional group Chemical group 0.000 abstract description 5
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- GVOISEJVFFIGQE-YCZSINBZSA-N n-[(1r,2s,5r)-5-[methyl(propan-2-yl)amino]-2-[(3s)-2-oxo-3-[[6-(trifluoromethyl)quinazolin-4-yl]amino]pyrrolidin-1-yl]cyclohexyl]acetamide Chemical compound CC(=O)N[C@@H]1C[C@H](N(C)C(C)C)CC[C@@H]1N1C(=O)[C@@H](NC=2C3=CC(=CC=C3N=CN=2)C(F)(F)F)CC1 GVOISEJVFFIGQE-YCZSINBZSA-N 0.000 description 12
- YLEIFZAVNWDOBM-ZTNXSLBXSA-N ac1l9hc7 Chemical compound C([C@H]12)C[C@@H](C([C@@H](O)CC3)(C)C)[C@@]43C[C@@]14CC[C@@]1(C)[C@@]2(C)C[C@@H]2O[C@]3(O)[C@H](O)C(C)(C)O[C@@H]3[C@@H](C)[C@H]12 YLEIFZAVNWDOBM-ZTNXSLBXSA-N 0.000 description 10
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- -1 2-benzylbenzaldehyde compound Chemical class 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
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- 125000003172 aldehyde group Chemical group 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- SRVFFFJZQVENJC-IHRRRGAJSA-N aloxistatin Chemical compound CCOC(=O)[C@H]1O[C@@H]1C(=O)N[C@@H](CC(C)C)C(=O)NCCC(C)C SRVFFFJZQVENJC-IHRRRGAJSA-N 0.000 description 2
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- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- HBENZIXOGRCSQN-VQWWACLZSA-N (1S,2S,6R,14R,15R,16R)-5-(cyclopropylmethyl)-16-[(2S)-2-hydroxy-3,3-dimethylpentan-2-yl]-15-methoxy-13-oxa-5-azahexacyclo[13.2.2.12,8.01,6.02,14.012,20]icosa-8(20),9,11-trien-11-ol Chemical compound N1([C@@H]2CC=3C4=C(C(=CC=3)O)O[C@H]3[C@@]5(OC)CC[C@@]2([C@@]43CC1)C[C@@H]5[C@](C)(O)C(C)(C)CC)CC1CC1 HBENZIXOGRCSQN-VQWWACLZSA-N 0.000 description 1
- FANCTJAFZSYTIS-IQUVVAJASA-N (1r,3s,5z)-5-[(2e)-2-[(1r,3as,7ar)-7a-methyl-1-[(2r)-4-(phenylsulfonimidoyl)butan-2-yl]-2,3,3a,5,6,7-hexahydro-1h-inden-4-ylidene]ethylidene]-4-methylidenecyclohexane-1,3-diol Chemical compound C([C@@H](C)[C@@H]1[C@]2(CCCC(/[C@@H]2CC1)=C\C=C\1C([C@@H](O)C[C@H](O)C/1)=C)C)CS(=N)(=O)C1=CC=CC=C1 FANCTJAFZSYTIS-IQUVVAJASA-N 0.000 description 1
- PHDIJLFSKNMCMI-ITGJKDDRSA-N (3R,4S,5R,6R)-6-(hydroxymethyl)-4-(8-quinolin-6-yloxyoctoxy)oxane-2,3,5-triol Chemical compound OC[C@@H]1[C@H]([C@@H]([C@H](C(O1)O)O)OCCCCCCCCOC=1C=C2C=CC=NC2=CC=1)O PHDIJLFSKNMCMI-ITGJKDDRSA-N 0.000 description 1
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- ZXSQEZNORDWBGZ-UHFFFAOYSA-N 1,3-dihydropyrrolo[2,3-b]pyridin-2-one Chemical compound C1=CN=C2NC(=O)CC2=C1 ZXSQEZNORDWBGZ-UHFFFAOYSA-N 0.000 description 1
- AKEXVWKYUAMNKL-UHFFFAOYSA-N 2,2-dimethylpropanoic acid;silver Chemical compound [Ag].CC(C)(C)C(O)=O AKEXVWKYUAMNKL-UHFFFAOYSA-N 0.000 description 1
- ICZGPFGVNCZWRT-UHFFFAOYSA-N 2-(2-benzylphenyl)-1h-benzimidazole Chemical compound C=1C=CC=C(C=2NC3=CC=CC=C3N=2)C=1CC1=CC=CC=C1 ICZGPFGVNCZWRT-UHFFFAOYSA-N 0.000 description 1
- CJNRGSHEMCMUOE-UHFFFAOYSA-N 2-piperidin-1-ylethanamine Chemical compound NCCN1CCCCC1 CJNRGSHEMCMUOE-UHFFFAOYSA-N 0.000 description 1
- WRXNJTBODVGDRY-UHFFFAOYSA-N 2-pyrrolidin-1-ylethanamine Chemical compound NCCN1CCCC1 WRXNJTBODVGDRY-UHFFFAOYSA-N 0.000 description 1
- QBXVXKRWOVBUDB-GRKNLSHJSA-N ClC=1C(=CC(=C(CN2[C@H](C[C@H](C2)O)C(=O)O)C1)OCC1=CC(=CC=C1)C#N)OCC1=C(C(=CC=C1)C1=CC2=C(OCCO2)C=C1)C Chemical compound ClC=1C(=CC(=C(CN2[C@H](C[C@H](C2)O)C(=O)O)C1)OCC1=CC(=CC=C1)C#N)OCC1=C(C(=CC=C1)C1=CC2=C(OCCO2)C=C1)C QBXVXKRWOVBUDB-GRKNLSHJSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000006069 Suzuki reaction reaction Methods 0.000 description 1
- 238000005874 Vilsmeier-Haack formylation reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- WVDDGKGOMKODPV-UHFFFAOYSA-N benzyl alcohol Substances OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 1
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- UDGSVBYJWHOHNN-UHFFFAOYSA-N n',n'-diethylethane-1,2-diamine Chemical compound CCN(CC)CCN UDGSVBYJWHOHNN-UHFFFAOYSA-N 0.000 description 1
- MFIGJRRHGZYPDD-UHFFFAOYSA-N n,n'-di(propan-2-yl)ethane-1,2-diamine Chemical compound CC(C)NCCNC(C)C MFIGJRRHGZYPDD-UHFFFAOYSA-N 0.000 description 1
- QAPTWHXHEYAIKG-RCOXNQKVSA-N n-[(1r,2s,5r)-5-(tert-butylamino)-2-[(3s)-2-oxo-3-[[6-(trifluoromethyl)quinazolin-4-yl]amino]pyrrolidin-1-yl]cyclohexyl]acetamide Chemical compound CC(=O)N[C@@H]1C[C@H](NC(C)(C)C)CC[C@@H]1N1C(=O)[C@@H](NC=2C3=CC(=CC=C3N=CN=2)C(F)(F)F)CC1 QAPTWHXHEYAIKG-RCOXNQKVSA-N 0.000 description 1
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- CQLFBEKRDQMJLZ-UHFFFAOYSA-M silver acetate Chemical compound [Ag+].CC([O-])=O CQLFBEKRDQMJLZ-UHFFFAOYSA-M 0.000 description 1
- 229940071536 silver acetate Drugs 0.000 description 1
- LKZMBDSASOBTPN-UHFFFAOYSA-L silver carbonate Substances [Ag].[O-]C([O-])=O LKZMBDSASOBTPN-UHFFFAOYSA-L 0.000 description 1
- 229910001958 silver carbonate Inorganic materials 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- HSYLTRBDKXZSGS-UHFFFAOYSA-N silver;bis(trifluoromethylsulfonyl)azanide Chemical compound [Ag+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F HSYLTRBDKXZSGS-UHFFFAOYSA-N 0.000 description 1
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- 229910052723 transition metal Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
- C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
- C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
- C07C29/14—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/18—Benzimidazoles; Hydrogenated benzimidazoles with aryl radicals directly attached in position 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
本发明公开了一种构建生物活性分子的重要有机合成中间体2‑苄基苯甲醛衍生物的合成方法。以廉价易得、具有结构多样性和多反应中心的2‑甲基苯甲醛和碘代芳烃为原料,以N,N‑二甲基乙二胺为瞬态导向基团,一步实现2‑苄基苯甲醛的合成,所得2‑苄基苯甲醛衍生物能够进一步转化生成功能化产物。该方法原料易得、操作简便,合成反应条件温和、反应效率高,其官能团具有多样性。
Description
技术领域
本发明属于化学有机合成领域,具体涉及一种构建生物活性分子的重要有机合成中间体2-苄基苯甲醛衍生物的合成方法。
背景技术
2-苄基苯甲醛是重要的有机合成中间体,广泛应用于稠环、螺环、天然产物和生物活性分子的合成(Adv. Synth. Catal.2011, 353, 569;J. Org. Chem.1985, 50, 4829;Bioorg. Med. Chem. Lett.2013, 23, 5523)。
目前,合成2-苄基苯甲醛的方法主要以下几种:1) 通过氧化邻苄基苄醇来实现;2) 通过Suzuki交叉偶联来实现;3) 通过Vilsmeier反应来实现;4) 通过Kumada−Tamao−Corriu反应来实现。但这些方法都存在一定的局限性,如反应条件苛刻、原子和步骤经济性差、区域选择性不好、底物适用范围窄,以及官能团容忍性差等(Catal. Commun.2009, 10,1835;J. Org. Chem.2011, 76, 7005;J. Org. Chem.2002, 67, 1247;J. Am. Chem. Soc.2015, 137, 14367;Chem. -Eur. J.2014, 20, 3162)。因此,寻找更高效、更绿色的方式来合成2-苄基苯甲醛成为了亟待解决的问题。
发明内容
针对现有技术中存在的问题,本发明提供了一种2-苄基苯甲醛衍生物的合成方法。
本发明为了实现上述目的所采用的技术方案为:
本发明提供了一种2-苄基苯甲醛衍生物的合成方法,以2-甲基苯甲醛1和碘代芳烃2为起始原料,以钯盐为催化剂,银盐为碱,加入助剂N,N-二烷基乙二胺,及添加剂参与的条件下在溶剂中发生反应,生成2-苄基苯甲醛衍生物,化学反应式如下:
上述反应过程中,所述2-甲基苯甲醛1与碘代芳烃2的摩尔比为1:1-1:3;所述2-甲基苯甲醛1与钯盐的摩尔比为1:0.05-1:0.2;所述2-甲基苯甲醛1与银盐的摩尔比1:1-1:3;所述2-甲基苯甲醛1与助剂N,N-二烷基乙二胺的摩尔比1:0.1-1:2;所述添加剂的用量为100 mg/0.3 mmol 2-甲基苯甲醛1;所述2-甲基苯甲醛1在溶剂中的摩尔浓度为0.05-1.0M。
优化的,所述钯盐选自Pd(OAc)2、Pd(TFA)2、Pd(MeCN)2Cl2、Pd(PhCN)2Cl2、Pd(PPh3)2Cl2中的一种或两种;所述银盐选自双三氟甲烷磺酰亚胺银、特戊酸银、三氟乙酸银、碳酸银、氧化银中的一种或两种;所述N,N-二烷基乙二胺选自N,N-二甲基乙二胺、N,N-二乙基乙二胺、N,N-二异丙基基乙二胺、1-(2-氨乙基)吡咯烷、1-(2-氨乙基)哌啶中的一种或两种;所述添加剂选自3A分子筛、4A分子筛、5A分子筛中的一种或两种;所述溶剂选自三氟甲苯、六氟异丙醇、1,2-二氯乙烷、二氯甲烷、乙腈、乙酸乙酯中的一种或两种混合物;所述溶剂最优化的为六氟异丙醇。
本发明提供的反应为在空气、氧气、氮气或氩气的气氛中,在25-150 ºC温度下反应1-48小时。
进一步的,所述反应的温度为120-140 oC;所述反应时间为12-48 h。
本发明以廉价易得、具有结构多样性的2-甲基苯甲醛化合物1和碘代芳烃化合物2为原料,在助剂、添加剂和溶剂的参与下,一定反应气氛下,以钯盐为催化剂,银盐为碱,通过原位形成亚胺导向基团及过渡金属催化C-H键活化,一步合成2-苄基苯甲醛衍生物,反应结束后按常规分离纯化方法进行产物分离和表征,得到2-苄基苯甲醛衍生物1,所得2-苄基苯甲醛能够进一步转化生成功能化产物。通过调控1中的R1、R2取代基,合成一系列不同结构的2-苄基苯甲醛衍生物。本发明方法原料易得、反应条件温和、适应性广。与现有的2-苄基苯甲醛衍生物合成方法相比较,本发明所用助剂廉价易得,反应操作简便、条件温和、反应效率高,产物具有很好的官能团多样性。本发明合成的2-苄基苯甲醛骨架结构中的醛基可以进一步官能团化,可以作为药物及化工用品结构的中间体。
本发明合成路线如下述反应式所示:
本发明具有以下优点:
1) 合成子2-甲基苯甲醛化合物2具有结构多样性,可以用来合成不同类型和结构的2-苄基苯甲醛衍生物1。
2) 合成子2-甲基苯甲醛化合物2及助剂N,N-二烷基乙二胺廉价易得,成本低廉,易于工业化生产。
3) 2-苄基苯甲醛衍生物1合成反应条件温和、底物适用范围广、官能团容忍性好、产物收率高。
4) 2-苄基苯甲醛衍生物1产物官能团多样性,具有广泛的应用性。
5) 2-苄基苯甲醛衍生物1骨架结构中醛基可以进一步官能团化,此结构可以作为药物及化工用品结构的中间体。
具体实施方式
本发明以2-甲基苯甲醛化合物1(商业可得)和碘代芳烃化合物2 (商业可得)为原料(合成子),以钯盐如Pd(OAc)2为催化剂,以N,N-二烷基乙二胺如N,N-二甲基乙二胺为助剂,于有机溶剂如六氟异丙醇中,加热条件下进行反应,生成2-苄基苯甲醛衍生物3(反应式如下)。
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1(0.3 mmol)、碘代芳烃化合物2(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6 mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
通过下述实施例有助于进一步理解本发明,但本发明的内容并不仅限于此。
实施例1
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(35.9 mg,收率61%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基苯甲醛衍生物(3a),黄色液体。1H NMR (400 MHz, CDCl3) δ 10.16 (s, 1H), 7.76 (d, J = 7.6 Hz, 1 H), 7.43 (t, J = 7.3 Hz, 1 H), 7.31 (t, J = 7.5Hz, 1 H), 7.18 (t, J = 7.5 Hz, 3 H), 7.13–7.01 (m, 3 H), 4.36 (s, 2 H). 13C{1H} NMR (100 M Hz, CDCl3)δ 192.5, 143.1, 140.4, 134.1, 134.0, 132.2, 131.8,128.9, 128.7, 127.1, 126.4, 38.2. HRMS (ESI) calcd for C14H13O [M+H]+:197.0961; Found: 197.0965.
实施例2
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2b(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3b(41.2 mg,收率60%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基苯甲醛衍生物(3b),黄色液体。1H NMR (400 MHz, CDCl3) δ 10.15 (s, 1H), 7.75 (d, J = 7.6 Hz, 1 H), 7.42 (t, J = 7.4 Hz, 1 H), 7.30 (t, J = 7.5Hz, 1 H), 7.15 (d, J = 7.6 Hz, 1 H), 6.96 (d, J = 8.4 Hz, 2 H), 6.72 (d, J =8.5 Hz, 2 H), 4.28 (s, 2 H), 3.66 (s, 3 H). 13C{1H} NMR (100 M Hz, CDCl3)δ192.5, 158.2, 143.6, 134.0, 133.9, 132.5, 132.0, 131.6, 129.8, 127.0, 114.1,55.3, 37.3. HRMS (ESI) calcd for C15H15O2 [M+H]+: 227.1067; Found: 227.1069.
实施例3
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2c(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3c(39.1 mg,收率62%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基苯甲醛衍生物(3c),黄色液体。1H NMR (400 MHz, CDCl3)δ 10.16 (s,1H), 7.76 (d, J = 7.6 Hz, 1H), 7.42 (t, J = 7.4 Hz, 1H), 7.30 (t, J = 7.5 Hz,1H), 7.16 (d, J = 8.1 Hz, 1H), 6.99 (d, J = 7.9 Hz, 2H), 6.93 (d, J = 7.9 Hz,2H), 4.31 (s, 2H), 2.21 (s, 3H). 13C{1H} NMR (100 M Hz, CDCl3) δ 192.5, 143.5,137.4, 135.9, 134.0, 131.9, 131.7, 129.4, 128.8, 127.0, 37.7, 21.1. HRMS(ESI) calcd for C15H15O [M+H]+: 211.1117; Found: 211.1119.
实施例4
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2d(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3d(40.3 mg,收率42%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基苯甲醛衍生物(3d),黄色液体。1H NMR (400 MHz, CDCl3) δ 10.07 (s,1H), 7.74 (d, J = 7.5 Hz, 1H), 7.52–7.39 (m, 3H), 7.33 (t, J = 7.4 Hz, 1H),7.14 (d, J = 7.6 Hz, 1H), 6.79 (d, J = 8.0 Hz, 2H), 4.28 (s, 2H). 13C{1H} NMR(100 M Hz, CDCl3) δ192.6, 142.2, 140.1, 137.7, 134.1, 133.9, 133.3, 131.7,131.0, 127.3, 91.6, 37.8. HRMS (ESI) calcd for C14H12OI [M+H]+: 322.9927;Found: 322.9930.
实施例5
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1b(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3e(38.5 mg,收率61%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基苯甲醛衍生物(3e),黄色液体。1H NMR (400 MHz, CDCl3). δ 10.16 (s, 1H), 7.68 (d, J = 7.6 Hz, 1 H), 7.36 (d, J = 7.4 Hz, 1 H), 7.26 (t, J = 7.6Hz, 1 H), 7.15 (t, J = 7.4 Hz, 2 H), 7.07 (t, J = 7.2 Hz, 1 H), 6.92 (d, J =7.5 Hz, 2 H), 4.41 (s, 2 H), 2.22 (s, 3 H). 13C{1H} NMR (100 M Hz, CDCl3) δ192.9, 140.7, 139.6, 138.9, 136.2, 134.8, 129.5, 128.6, 128.2, 127.0, 126.2,33.3, 19.7. HRMS (ESI) calcd for C15H15O [M+H]+: 211.1117; Found: 211.1119.
实施例6
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1c(0.3 mmol)、碘代芳烃化合物2b(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3f(47.0 mg,收率60%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基苯甲醛衍生物(3f),黄色液体。1H NMR (400 MHz, CDCl3): δ 10.21 (s, 1H), 7.79 (d, J= 8.2 Hz, 1 H), 7.37 (d, J= 8.2 Hz, 1 H), 7.23 (s, 1 H), 7.06(d, J= 8.4 Hz, 2 H), 6.84 (d, J= 8.4 Hz, 2 H), 4.35 (s, 2 H), 3.78 (s, 3 H); 13C{1H} NMR (100 M Hz, CDCl3): δ 191.2, 158.4, 145.5, 140.4, 133.3, 132.3,131.5, 131.5, 129.9 (2C), 127.4, 114.3 (2C), 55.4, 37.00. HRMS (ESI) calcdfor C15H14O2Cl [M+H]+: 261.0677; Found: 261.0680.
实施例7
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(TFA)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(35.4 mg,收率60%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
实施例8
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(MeCN)2Cl2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(29.5 mg,收率50%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
实施例9
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.36 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(31 mg,收率52%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
实施例10
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.24 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(29 mg,收率49%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
实施例11
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,130 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(33.1 mg,收率55%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
对比例1
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。通过核磁共振波谱法没有检测到产物2-苄基苯甲醛3a的生成。
对比例2
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),醋酸银(0.6 mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 六氟异丙醇,120 ºC搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(8 mg,收率13%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
对比例3
具体过程为:在25 mL schlenk封管中,空气下依次加入2-甲基苯甲醛化合物1a(0.3 mmol)、碘代芳烃化合物2a(0.45 mmol)、Pd(OAc)2(10 mol%),三氟乙酸银(0.6mmol),N,N-二甲基乙二胺(0.3 mmol),4A分子筛(100 mg)和2.0 mL 三氟乙醇(TFE),120 ºC 搅拌24小时。利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物3a(12.5 mg,收率21%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
应用例1
具体过程为:在25 mL schlenk封管中,空气下依次加入2-苄基苯甲醛化合物3a(0.2 mmol)、邻苯二胺4(0.2 mmol)、2.7 Ml DMF和0.3 mL水,90℃搅拌反应。待反应完全后,将反应液冷却至室温,用EtOAc (5 mL)/水 (5 mL),水相用EtOAc萃取(3×5 mL),有机相用水萃取(3×5 mL),之后有机相用无水硫酸钠干燥,减压浓缩后利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 20:1),得到目标产物5(47.0 mg,收率83%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-(2-苄基苯基)苯并咪唑 (5),白色固体。1H NMR (400 MHz, DMSO-d 6) δ 12.66(s, 1H), 7.68 (t, J = 7.8 Hz, 2H), 7.49 (d, J =7.8 Hz, 1H), 7.41 – 7.35 (m,2H), 7.30 (d, J = 7.8 Hz, 1H), 7.22 – 7.12 (m, 4H), 7.07− 7.04 (m, 3H), 4.52(s, 2H); 13C NMR (100 MHz, DMSO-d 6) δ 152.2, 144.1, 141.7, 141.1, 134.8,131.4, 130.3, 130.2, 129.9, 129.1, 128.6, 126.8, 126.2, 122.8, 121.9, 119.4,111.7, 38.4.. HRMS (ESI) calcd for C20H17N2 [M+H]+: 285.1386; Found: 285.1390。
应用例2
具体过程为:在25 mL schlenk封管中,空气下依次加入2-苄基苯甲醛化合物3g(0.2 mmol)、三异丙氧基铝(0.2 mmol)和3 mL异丙醇,加热至回流搅拌反应。待反应完全后,将反应液冷却至室温,硅藻土过滤,滤液减压浓缩后利用硅胶柱层析分离(洗脱液为石油醚(60-90 ºC)/乙酸乙酯,v/v = 50:1),得到目标产物6(35.0 mg,收率78%)。目标产物通过核磁共振谱和高分辨质谱测定得到确认。
化合物表征数据
2-苄基-4-氟苄醇 (6),无色液体。1H NMR (400 MHz, CDCl3) δ 7.28 – 7.25 (m,2H), 7.20 − 7.17 (m, 2H), 7.12 – 7.09 (m, 3H), 6.95 – 6.92 (m, 1H), 4.61 (d,J = 6.0 Hz, 2H), 4.00 (s, 2H), 1.52 (t, J = 5.9 Hz, 1H); 13C NMR (100 MHz,CDCl3) δ 161.8 (d, J = 243.3 Hz), 141.1 (d, J = 6.7 Hz), 140.1, 133.5 (d, J =3.3 Hz), 131.9 (d, J = 7.8 Hz), 128.6, 128.5, 126.3, 114.5 (d, J = 21.1 Hz),114.1 (d, J = 20.8 Hz), 62.5 (d, J = 1.5 Hz), 37.8; 19F NMR (376 MHz, CDCl3) δ-116.58. HRMS (ESI) calcd for C14H14FO [M+H]+: 217.1023; Found: 217.1025。
Claims (2)
1.一种2-苄基苯甲醛衍生物的合成方法,其特征在于,以2-甲基苯甲醛1和碘代芳烃2为起始原料,以钯盐为催化剂,银盐为碱,加入助剂N,N-二烷基乙二胺,及添加剂参与的条件下在溶剂中发生反应,生成2-苄基苯甲醛衍生物,化学反应式如下:
所述2-甲基苯甲醛1与碘代芳烃2的摩尔比为1:1-1:3;所述2-甲基苯甲醛1与钯盐的摩尔比为1:0.05-1:0.2;所述2-甲基苯甲醛1与银盐的摩尔比1:1-1:3;所述2-甲基苯甲醛1与助剂N,N-二烷基乙二胺的摩尔比1:0.1-1:2;所述添加剂的用量为100 mg/0.3 mmol 2-甲基苯甲醛1;所述2-甲基苯甲醛1在溶剂中的摩尔浓度为0.05-1.0 M;
所述钯盐选自Pd(OAc)2、Pd(TFA)2、Pd(MeCN)2Cl2中的一种或两种;所述银盐为三氟乙酸银;所述N,N-二烷基乙二胺为N,N-二甲基乙二胺;所述添加剂选自3A分子筛、4A分子筛、5A分子筛中的一种或两种;所述溶剂为六氟异丙醇;
反应的温度为120-140 ℃ ;所述反应时间为12-48 h。
2.据权利要求1所述的合成方法,其特征在于,所述反应为在空气、氧气、氮气或氩气的气氛中反应。
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Acetohydrazone: A Transient Directing Group for Arylation of Unactivated C(sp3)−H Bonds;Fei Ma等;《Organic Letters》;20161231;第18卷(第11期);第2708-2711页 * |
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