CN117342964A - 一种n,n′-双(2,4,6-三甲氧基苯基)草酰胺的合成方法 - Google Patents
一种n,n′-双(2,4,6-三甲氧基苯基)草酰胺的合成方法 Download PDFInfo
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- NGVJMONAWAGMOA-UHFFFAOYSA-N N,N'-bis(2,4,6-trimethoxyphenyl)oxamide Chemical compound COC1=C(C(=CC(=C1)OC)OC)NC(C(=O)NC1=C(C=C(C=C1OC)OC)OC)=O NGVJMONAWAGMOA-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000001308 synthesis method Methods 0.000 title description 3
- 239000003960 organic solvent Substances 0.000 claims abstract description 23
- BPWYNWSOQOXOPI-UHFFFAOYSA-N 2-bromo-1,3,5-trimethoxybenzene Chemical compound COC1=CC(OC)=C(Br)C(OC)=C1 BPWYNWSOQOXOPI-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- GRHAUEFIQOUKAY-UHFFFAOYSA-N 2,4,6-trimethoxyaniline;hydrochloride Chemical compound Cl.COC1=CC(OC)=C(N)C(OC)=C1 GRHAUEFIQOUKAY-UHFFFAOYSA-N 0.000 claims abstract description 17
- LKUDPHPHKOZXCD-UHFFFAOYSA-N 1,3,5-trimethoxybenzene Chemical compound COC1=CC(OC)=CC(OC)=C1 LKUDPHPHKOZXCD-UHFFFAOYSA-N 0.000 claims abstract description 16
- CTSLXHKWHWQRSH-UHFFFAOYSA-N oxalyl chloride Chemical compound ClC(=O)C(Cl)=O CTSLXHKWHWQRSH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims abstract description 8
- 239000003446 ligand Substances 0.000 claims abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 7
- 238000007112 amidation reaction Methods 0.000 claims abstract description 5
- 238000002425 crystallisation Methods 0.000 claims abstract description 4
- 230000008025 crystallization Effects 0.000 claims abstract description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 15
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- GQHTUMJGOHRCHB-UHFFFAOYSA-N 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine Chemical compound C1CCCCN2CCCN=C21 GQHTUMJGOHRCHB-UHFFFAOYSA-N 0.000 claims description 4
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 claims description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 238000005576 amination reaction Methods 0.000 claims description 4
- 238000005893 bromination reaction Methods 0.000 claims description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 3
- 229910021595 Copper(I) iodide Inorganic materials 0.000 claims description 3
- ONIBWKKTOPOVIA-BYPYZUCNSA-N L-Proline Chemical compound OC(=O)[C@@H]1CCCN1 ONIBWKKTOPOVIA-BYPYZUCNSA-N 0.000 claims description 3
- 229930182821 L-proline Natural products 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 229960002429 proline Drugs 0.000 claims description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005751 Copper oxide Substances 0.000 claims description 2
- PMMYEEVYMWASQN-DMTCNVIQSA-N Hydroxyproline Chemical compound O[C@H]1CN[C@H](C(O)=O)C1 PMMYEEVYMWASQN-DMTCNVIQSA-N 0.000 claims description 2
- 229910000431 copper oxide Inorganic materials 0.000 claims description 2
- KVKFRMCSXWQSNT-UHFFFAOYSA-N n,n'-dimethylethane-1,2-diamine Chemical compound CNCCNC KVKFRMCSXWQSNT-UHFFFAOYSA-N 0.000 claims description 2
- 229910000160 potassium phosphate Inorganic materials 0.000 claims description 2
- 235000011009 potassium phosphates Nutrition 0.000 claims description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- -1 2-amino-1, 3, 5-trimethoxyphenyl hydrochloride Chemical compound 0.000 claims 1
- 238000006396 nitration reaction Methods 0.000 abstract description 7
- 238000005984 hydrogenation reaction Methods 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 3
- 238000006722 reduction reaction Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- FNSAKXLEFPFZOM-UHFFFAOYSA-N 2,4,6-trimethoxyaniline Chemical compound COC1=CC(OC)=C(N)C(OC)=C1 FNSAKXLEFPFZOM-UHFFFAOYSA-N 0.000 description 8
- VWYAWLZEMLQGJH-UHFFFAOYSA-N 1,3,5-trimethoxy-2-nitrobenzene Chemical compound COC1=CC(OC)=C([N+]([O-])=O)C(OC)=C1 VWYAWLZEMLQGJH-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- QSVQZFVXAUGEMT-UHFFFAOYSA-N 2-nitrobenzene-1,3,5-triol Chemical compound OC1=CC(O)=C([N+]([O-])=O)C(O)=C1 QSVQZFVXAUGEMT-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XKEFYDZQGKAQCN-UHFFFAOYSA-N 1,3,5-trichlorobenzene Chemical compound ClC1=CC(Cl)=CC(Cl)=C1 XKEFYDZQGKAQCN-UHFFFAOYSA-N 0.000 description 1
- 238000006964 Chan-Lam coupling reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- MVEAAGBEUOMFRX-UHFFFAOYSA-N ethyl acetate;hydrochloride Chemical compound Cl.CCOC(C)=O MVEAAGBEUOMFRX-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
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- 238000007867 post-reaction treatment Methods 0.000 description 1
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- 238000000967 suction filtration Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- FGMPLJWBKKVCDB-UHFFFAOYSA-N trans-L-hydroxy-proline Natural products ON1CCCC1C(O)=O FGMPLJWBKKVCDB-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/02—Preparation of carboxylic acid amides from carboxylic acids or from esters, anhydrides, or halides thereof by reaction with ammonia or amines
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/02—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions involving the formation of amino groups from compounds containing hydroxy groups or etherified or esterified hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
- C07C41/22—Preparation of ethers by reactions not forming ether-oxygen bonds by introduction of halogens; by substitution of halogen atoms by other halogen atoms
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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
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
本发明公开了一种N,N'‑双(2,4,6‑三甲氧基苯基)草酰胺的合成方法,包括以下步骤:将1,3,5‑三甲氧基苯加入有机溶剂中,加入溴代试剂反应,反应完毕后,加水析晶、分离、干燥,即得2,4,6‑三甲氧基溴苯;将2,4,6‑三甲氧基溴苯加入有机溶剂中,加入氨水、碱、催化剂、配体,反应温度为90‑120℃,反应完毕后,萃取、成盐、过滤、干燥,即得2‑氨基‑1,3,5‑三甲氧基苯盐酸盐;酰胺化反应:将2‑氨基‑1,3,5‑三甲氧基苯盐酸盐加入有机溶剂中,加入碱、草酰氯,反应温度为0‑30℃,反应完毕后,过滤、浓缩、结晶、过滤、干燥,即得N,N'‑双(2,4,6‑三甲氧基苯基)草酰胺。本发明避免了硝化反应与氢化还原反应,提高了反应的安全性,避免了硝化废酸的生成,具有环境友好性;反应收率提高至66.1%。
Description
技术领域
本发明属于化合物合成技术领域,具体涉及一种N,N′-双(2,4,6-三甲氧基苯基)草酰胺的合成方法。
背景技术
N,N′-双(2,4,6-三甲氧基苯基)草酰胺是一种铜催化剂配体,能广泛应用于chan-lam、Ullmannn等铜催化反应。
N,N′-双(2,4,6-三甲氧基苯基)草酰胺一般以2,4,6-三甲氧基苯胺为原料与草酰氯反应制得,2,4,6-三甲氧基苯胺的合成有以下几条路线:
Sankaraman,S.;Haney,W.A.;Kochi,J.K.等人在Journal of the AmericanChemical Society,1987,vol.109,p.5235中公开了以1,3,5-三氯苯为原料,进行硝化反应,以18%的收率得到2,4,6-三甲氧基硝基苯;2,4,6-三甲氧基硝基苯再经氢化还原得2,4,6-三甲氧基苯胺。
Kamer,Paul C.J.;Nolte,Roeland J.M.;Drenth,Wiendelt等人在Journal oftheAmerican Chemical Society,1988,vol.110,#20,p.6818–6825上报道了1,3,5-三苯酚为原料进行硝化反应以62%的收率得到2,4,6-三羟基硝基苯,2,4,6-三羟基硝基苯与硫酸二甲酯反应以68%的收率得到2,4,6-三甲氧基硝基苯;2,4,6-三甲氧基硝基苯再经氢化还原得2,4,6-三甲氧基苯胺。
针对上述两条路线,均需要进行硝化反应,反应危险且产生大量废酸;其次还要经过氢化还原,反应成本高危险性也较高;另外两条路线收率较低原子经济性差;综上不适合工业化生产。
发明内容
针对上述现有技术中存在的问题,本发明的目的是提供一种N,N′-双(2,4,6-三甲氧基苯基)草酰胺的合成方法以解决上述技术问题。
为实现上述目的,本发明通过以下技术方案来实现:
一种N,N′-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其合成路线如下:
包括以下步骤:
S1:溴代反应:将1,3,5-三甲氧基苯加入有机溶剂中,加入溴代试剂,进行溴代反应,反应温度为20-30℃,反应完毕后,加水析晶,分离、干燥,即得2,4,6-三甲氧基溴苯。
步骤S1中,所述有机溶剂为乙酸、乙腈、丙酮中的一种。
步骤S1中,所述有机溶剂与1,3,5-三甲氧基苯的质量比为(5-10):1。
步骤S1中,所述溴代试剂为溴素、NBS中的一种。
步骤S1中,所述1,3,5-三甲氧基苯与溴代试剂的摩尔比为1:(0.9-1.1)。
S2:胺基化反应:将2,4,6-三甲氧基溴苯加入有机溶剂中,加入氨水、碱、催化剂、配体,反应温度为90-120℃;反应完毕后,萃取、成盐、过滤、干燥,即得2-氨基-1,3,5-三甲氧基苯盐酸盐。
步骤S2中,所述催化剂为氧化铜、碘化亚铜等中的一种。
步骤S2中,所述催化剂与2,4,6-三甲氧基溴苯的摩尔比为(0.1-0.2):1。
步骤S2中,所述有机溶剂为DMSO、DMAc(N,N-二甲基乙酰胺)、DMF中的一种。
步骤S2中,所述有机溶剂与2,4,6-三甲氧基溴苯的质量比(5-10):1。
步骤S2中,所述配体为N,N’-二甲基乙二胺、L-脯氨酸、L-羟基脯氨酸。
步骤S2中,所述配体与2,4,6-三甲氧基溴苯的摩尔比为(0.2-0.4):1。
步骤S2中,所述碱为碳酸钾、碳酸钠、磷酸钾中的一种。
步骤S2中,所述碱与2,4,6-三甲氧基溴苯的摩尔比为3:(1.8-2.2)。
S3:酰胺化反应:将2-氨基-1,3,5-三甲氧基苯盐酸盐加入有机溶剂中,加入碱、草酰氯,反应温度为0-30℃;反应完毕后,过滤、浓缩、结晶、过滤、干燥,即得N,N′-双(2,4,6-三甲氧基苯基)草酰胺。
步骤S3中,所述有机溶剂为THF、二氯甲烷、乙酸乙酯中的一种。
步骤S3中,所述有机溶剂与2-氨基-1,3,5-三甲氧基苯盐酸盐的体积比为(5-10):1。
步骤S3中,所述碱为三乙胺、吡啶、DBU、三乙烯二胺、二异丙基乙胺中的一种。
步骤S3中,所述碱与2-氨基-1,3,5-三甲氧基苯盐酸盐的摩尔比为(2.5-3.5):1。
步骤S3中,所述草酰氯与2-氨基-1,3,5-三甲氧基苯盐酸盐的摩尔比为(0.4-0.8):1。
本发明的有益效果:
本发明避免了硝化反应与氢化还原反应,提高了反应的安全性,避免了硝化废酸的生成,具有环境友好性;反应收率提高至66.1%,增加了原子利用率,降低了生产成本;同时优化了反应后处理过程,操作简单适合工业化大生产。
附图说明
图1为实施例1制备的2,4,6-三甲氧基溴苯液相色谱图;
图2为实施例1制备的2,4,6-三甲氧基溴苯核磁氢谱图;
图3为实施例6制备的2-氨基-1,3,5-三甲氧基苯盐酸盐液相色谱图;
图4为实施例6制备的2-氨基-1,3,5-三甲氧基苯盐酸盐核磁氢谱图;
图5为实施例6制备的2-氨基-1,3,5-三甲氧基苯盐酸盐质谱图;
图6为实施例14制备的N,N′-双(2,4,6-三甲氧基苯基)草酰胺质谱图;
图7为实施例14制备的N,N′-双(2,4,6-三甲氧基苯基)草酰胺液相图。
具体实施方式
下面结合实施例对本发明作进一步说明,但本发明不局限于这些实施例。
S1溴代反应实施例
实施例1
将1,3,5-三甲氧基苯(200g,1.2mol)加入乙腈(2L)中,20-30℃下分批加入NBS(第一次114g、第二次60g、第三次40g,共1.2mol,批间隔15min),控温20-30℃反应0.5h,加水(6L)析晶,离心并用水(400mL)洗涤,50℃鼓风干燥,即得2,4,6-三甲氧基溴苯(280g,1.1mol),收率95.3%,纯度98%。
1H NMR(DMSO;400MHz)δ6.33(s,2H),3.82(s,6H),3.80(s,3H)。
实施例2-5为与实施例1不同工艺参数下制备2,4,6-三甲氧基溴苯的实施例,其收率情况见表1所示。
表1
试验 | 与实施例1不同的工艺参数 | 收率/% |
实施例2 | 将有机溶剂乙腈替换为等体积的乙酸 | 90.1 |
实施例3 | 将有机溶剂乙腈替换为等体积的丙酮 | 87.4 |
实施例4 | 将NBS替换为溴素,加入方式和当量不变 | 92.1 |
实施例5 | 加入NBS当量替换为1.05 | 93.3 |
S2氨基化反应实施例
实施例6
将2,4,6-三甲氧基溴苯(100g,0.4mol)加入DMSO(500mL),加入氨水(40g,0.6mol)、碘化亚铜(15.2g,0.08mol)、L-脯氨酸(18.4g,0.16mol)、碳酸钾(82g,0.6mol),闷罐90±5℃反应16h;反应完毕后,过滤,加入水(500mL),二氯甲烷(1000mL)萃取,有机相水(500mL)洗后加入4M盐酸乙酸乙酯(150mL),抽滤,收集固体,50℃鼓风干燥,即得2,4,6-三甲氧基苯胺盐酸盐(67.6g,0.31mol),收率76%,纯度99.3%。1H NMR(DMSO;400MHz)δ9.42(s,3H),6.40(s,2H),3.87(s,6H),3.81(s,3H)。LC/MS:184.21(M+1)。
实施例7-13为与实施例6不同工艺参数下制备2,4,6-三甲氧基苯胺盐酸盐的实施例,其收率及纯度情况见表2所示。
表2
S3酰胺化反应实施例
实施例14
将2,4,6-三甲氧基苯胺盐酸盐(100g,0.46mol)加入THF(1L)中,加入三乙胺(147g,1.46mol),控温0-5℃滴加草酰氯(29.2g,0.23mol),加料完毕后,25±5℃反应2小时,过滤,THF(0.1L)洗涤固体,收集滤液,浓缩,异丙醇(200mL)打浆,过滤,50±5℃烘干,即得N,N′-双(2,4,6-三甲氧基苯基)草酰胺(122g,0.20mol),收率90%,纯度99.2%。LC/MS:443.39(M+23)。
实施例15-19为与实施例14不同工艺参数下制备N,N′-双(2,4,6-三甲氧基苯基)草酰胺的实施例,其收率及纯度情况见表3所示。
表3
本发明中使用的水为去离子水。
以上所述,仅为本发明的优选实施例,并不用于限定本发明;但对于本领域的普通技术人员在不脱离本发明技术方案范围内,可利用以上所揭示的技术内容而作出的些许更动、修饰与演变的等同变化,均为本发明的等效实施例;同时,凡依据本发明的实质技术对以上实施例所作的任何等同变化的更动、修饰与演变等,均仍属于本发明的技术方案的保护范围之内。
Claims (10)
1.一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,包括以下步骤:
S1:溴代反应:将1,3,5-三甲氧基苯加入有机溶剂中,加入溴代试剂,反应温度为20-30℃,反应完毕后,加水析晶、分离、干燥,即得2,4,6-三甲氧基溴苯;
S2:胺基化反应:胺基化反应:将2,4,6-三甲氧基溴苯加入有机溶剂中,加入氨水、碱、催化剂、配体,反应温度为90-120℃,反应完毕后,萃取、成盐、过滤、干燥,即得2-氨基-1,3,5-三甲氧基苯盐酸盐;
S3:酰胺化反应:酰胺化反应:将2-氨基-1,3,5-三甲氧基苯盐酸盐加入有机溶剂中,加入碱、草酰氯,反应温度为0-30℃,反应完毕后,过滤、浓缩、结晶、过滤、干燥,即得N,N'-双(2,4,6-三甲氧基苯基)草酰胺。
2.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S1中,所述有机溶剂为乙酸、乙腈、丙酮中的一种;所述有机溶剂与1,3,5-三甲氧基苯的质量比为(5-10):1。
3.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S1中,所述溴代试剂为溴素、NBS中的一种;所述1,3,5-三甲氧基苯与溴代试剂的摩尔比为1:(0.9-1.1)。
4.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S2中,所述催化剂为氧化铜、碘化亚铜等中的一种;所述催化剂与2,4,6-三甲氧基溴苯的摩尔比为(0.1-0.2):1。
5.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S2中,所述有机溶剂为DMSO、DMA、DMF中的一种;所述有机溶剂与2,4,6-三甲氧基溴苯的质量比(5-10):1。
6.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S2中,所述配体为N,N’-二甲基乙二胺、L-脯氨酸、L-羟基脯氨酸;所述配体与2,4,6-三甲氧基溴苯的摩尔比为(0.2-0.4):1。
7.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S2中,所述碱为碳酸钾、碳酸钠、磷酸钾中的一种;所述碱与2,4,6-三甲氧基溴苯的摩尔比为3:(1.8-2.2)。
8.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S3中,所述有机溶剂为THF、二氯甲烷、乙酸乙酯中的一种;所述有机溶剂与2-氨基-1,3,5-三甲氧基苯盐酸盐的体积比为(5-10):1。
9.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S3中,所述碱为三乙胺、吡啶、DBU、三乙烯二胺、二异丙基乙胺中的一种;所述碱与2-氨基-1,3,5-三甲氧基苯盐酸盐的摩尔比为(2.5-3.5):1。
10.根据权利要求1所述的一种N,N'-双(2,4,6-三甲氧基苯基)草酰胺的合成方法,其特征在于,步骤S3中,所述草酰氯与2-氨基-1,3,5-三甲氧基苯盐酸盐的摩尔比为(0.4-0.8):1。
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106362797A (zh) * | 2015-07-20 | 2017-02-01 | 中国科学院上海有机化学研究所 | 草酸酰胺类配体及其在铜催化芳基卤代物偶联反应中的用途 |
CN114292153A (zh) * | 2022-01-10 | 2022-04-08 | 南通大学 | 一种芳基卤化物的高效合成方法 |
-
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106362797A (zh) * | 2015-07-20 | 2017-02-01 | 中国科学院上海有机化学研究所 | 草酸酰胺类配体及其在铜催化芳基卤代物偶联反应中的用途 |
CN114292153A (zh) * | 2022-01-10 | 2022-04-08 | 南通大学 | 一种芳基卤化物的高效合成方法 |
Non-Patent Citations (5)
Title |
---|
JIE GAO, SUBHAJIT BHUNIA, KAILIANG WANG, LU GAN, SHANGHUA XIA, AND DAWEI MA: "Discovery of N‑(Naphthalen-1-yl)‑N’‑alkyl Oxalamide Ligands Enables Cu-Catalyzed Aryl Amination with High Turnovers", ORGANIC LETTERS, vol. 19, no. 11, 2 June 2017 (2017-06-02), pages 2809 - 2812, XP055533929, DOI: 10.1021/acs.orglett.7b00901 * |
JINHO KIM, SUKBOK CHANG: "Ammonium salts as an inexpensive and convenient nitrogen source in the Cu-catalyzed amination of aryl halides at room temperature", CHEM. COMM., no. 26, 23 May 2008 (2008-05-23), pages 3052 - 3054 * |
LIQIN JIANG, XU LU, HUI ZHANG, YONGWEN JIANG, DAWEI MA: "CuI/4-Hydro-L-proline as a More Effective Catalytic System for Coupling of Aryl Bromides with N-Boc Hydrazine and Aqueous Ammonia", JOURNAL OF ORGANIC CHEMISTRY, vol. 74, no. 12, 19 June 2009 (2009-06-19), pages 4542 - 4546 * |
MENG, FEI; ZHU, XINHAI; LI, YING; XIE, JIANWEI; WANG, BO; YAO, JUNHUA; WAN, YIQIAN: "Efficient Copper-Catalyzed Direct Amination of Aryl Halides Using Aqueous Ammonia in Water", EUR. J. ORG. CHEM, vol. 2010, no. 32, 5 October 2010 (2010-10-05), pages 6149 * |
MOHAMMED K. ELMKADDEM, CE′DRIC FISCHMEISTER, CHRISTOPHE M. THOMAS AND JEAN-LUC RENAUD: "Efficient synthesis of aminopyridine derivatives by copper catalyzedamination reactions", CHEM. COMM., vol. 46, no. 6, 7 December 2009 (2009-12-07), pages 925 - 927, XP055713355, DOI: 10.1039/B916569J * |
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