CN106674145A - 2‑芳基苯并噁唑、2‑芳基苯并噻唑类化合物的制备方法 - Google Patents
2‑芳基苯并噁唑、2‑芳基苯并噻唑类化合物的制备方法 Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 42
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical compound NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 claims abstract description 5
- VRVRGVPWCUEOGV-UHFFFAOYSA-N 2-aminothiophenol Chemical compound NC1=CC=CC=C1S VRVRGVPWCUEOGV-UHFFFAOYSA-N 0.000 claims abstract description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 35
- 150000002460 imidazoles Chemical class 0.000 claims description 35
- 239000002585 base Substances 0.000 claims description 21
- 150000000183 1,3-benzoxazoles Chemical class 0.000 claims description 17
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 claims description 8
- 238000004440 column chromatography Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 claims description 4
- IOJUPLGTWVMSFF-UHFFFAOYSA-N cyclobenzothiazole Natural products C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 4
- IVSZLXZYQVIEFR-UHFFFAOYSA-N m-xylene Chemical group CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000002262 Schiff base Substances 0.000 claims description 2
- 150000004753 Schiff bases Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 abstract description 9
- 230000001590 oxidative effect Effects 0.000 abstract description 9
- 238000003786 synthesis reaction Methods 0.000 abstract description 6
- 150000003934 aromatic aldehydes Chemical class 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 150000004693 imidazolium salts Chemical class 0.000 abstract 2
- 235000015320 potassium carbonate Nutrition 0.000 abstract 1
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 56
- 239000000047 product Substances 0.000 description 27
- 238000004809 thin layer chromatography Methods 0.000 description 16
- 230000006837 decompression Effects 0.000 description 15
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 14
- 238000005160 1H NMR spectroscopy Methods 0.000 description 14
- 239000012043 crude product Substances 0.000 description 14
- ZMXYNJXDULEQCK-UHFFFAOYSA-N 2-amino-p-cresol Chemical compound CC1=CC=C(O)C(N)=C1 ZMXYNJXDULEQCK-UHFFFAOYSA-N 0.000 description 10
- 238000004587 chromatography analysis Methods 0.000 description 8
- RABBMOYULJIAFU-UHFFFAOYSA-N 1h-pyrrole;thiophene Chemical class C=1C=CNC=1.C=1C=CSC=1 RABBMOYULJIAFU-UHFFFAOYSA-N 0.000 description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 125000000623 heterocyclic group Chemical group 0.000 description 4
- HZNVUJQVZSTENZ-UHFFFAOYSA-N 2,3-dichloro-5,6-dicyano-1,4-benzoquinone Chemical compound ClC1=C(Cl)C(=O)C(C#N)=C(C#N)C1=O HZNVUJQVZSTENZ-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- DORMTBIPKNPJPY-UHFFFAOYSA-N acetic acid;iodobenzene Chemical compound CC(O)=O.IC1=CC=CC=C1 DORMTBIPKNPJPY-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- -1 thiazole) class compound Chemical class 0.000 description 3
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 description 3
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 2
- 235000010233 benzoic acid Nutrition 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical compound BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- CNUDBTRUORMMPA-UHFFFAOYSA-N formylthiophene Chemical class O=CC1=CC=CS1 CNUDBTRUORMMPA-UHFFFAOYSA-N 0.000 description 2
- 231100000086 high toxicity Toxicity 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 2
- JSHJJLQJRLNBBA-UHFFFAOYSA-N 2-amino-3-chlorophenol Chemical compound NC1=C(O)C=CC=C1Cl JSHJJLQJRLNBBA-UHFFFAOYSA-N 0.000 description 1
- NDOPHXWIAZIXPR-UHFFFAOYSA-N 2-bromobenzaldehyde Chemical class BrC1=CC=CC=C1C=O NDOPHXWIAZIXPR-UHFFFAOYSA-N 0.000 description 1
- 125000006276 2-bromophenyl group Chemical group [H]C1=C([H])C(Br)=C(*)C([H])=C1[H] 0.000 description 1
- FPYUJUBAXZAQNL-UHFFFAOYSA-N 2-chlorobenzaldehyde Chemical class ClC1=CC=CC=C1C=O FPYUJUBAXZAQNL-UHFFFAOYSA-N 0.000 description 1
- CSDSSGBPEUDDEE-UHFFFAOYSA-N 2-formylpyridine Chemical class O=CC1=CC=CC=N1 CSDSSGBPEUDDEE-UHFFFAOYSA-N 0.000 description 1
- 125000004204 2-methoxyphenyl group Chemical group [H]C1=C([H])C(*)=C(OC([H])([H])[H])C([H])=C1[H] 0.000 description 1
- SUISZCALMBHJQX-UHFFFAOYSA-N 3-bromobenzaldehyde Chemical class BrC1=CC=CC(C=O)=C1 SUISZCALMBHJQX-UHFFFAOYSA-N 0.000 description 1
- 125000006275 3-bromophenyl group Chemical group [H]C1=C([H])C(Br)=C([H])C(*)=C1[H] 0.000 description 1
- 125000004172 4-methoxyphenyl group Chemical group [H]C1=C([H])C(OC([H])([H])[H])=C([H])C([H])=C1* 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 description 1
- 229910000024 caesium carbonate Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical class N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003375 selectivity assay Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- YTZKOQUCBOVLHL-UHFFFAOYSA-N tert-butylbenzene Chemical class CC(C)(C)C1=CC=CC=C1 YTZKOQUCBOVLHL-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
- C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
- C07D263/56—Benzoxazoles; Hydrogenated benzoxazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached in position 2
- C07D263/57—Aryl or substituted aryl radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/60—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings condensed with carbocyclic rings or ring systems
- C07D277/62—Benzothiazoles
- C07D277/64—Benzothiazoles with only hydrocarbon or substituted hydrocarbon radicals attached in position 2
- C07D277/66—Benzothiazoles with only hydrocarbon or substituted hydrocarbon radicals attached in position 2 with aromatic rings or ring systems directly attached in position 2
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
本发明属于有机合成技术领域,具体为2‑芳基苯并噁唑、2‑芳基苯并噻唑类化合物的制备方法。本发明将2‑氨基苯酚(2‑氨基苯硫酚)和芳香醛在100‑130℃下搅拌,加入10%~20% 摩尔当量的咪唑盐和25%~50% 摩尔当量的K2CO3,利用空气作为氧化剂,反应合成2‑芳基苯并噁唑和2‑芳基苯并噻唑类化合物。本发明采用便宜易制得的咪唑盐作为催化剂及廉价的空气作为氧化剂高产率的合成目标产物,大大降低生产成本,更大程度上能够适应工业化应用。
Description
技术领域
本发明属于有机合成技术领域,具体涉及一种2-芳基苯并噁唑(噻唑)类化合物的制备方法。
背景技术
苯并噁唑类化合物广泛地存在于生物和医药领域,具有抑制细菌、真菌、寄生虫等生物活性,是一类重要的具有芳香性质的杂环分子骨架( 参见:Eur. J. Med. Chem.2005, 40, 949;J. Heterocyclic Chem. 2011, 48, 1126;J. Med. Chem. 1993, 36,953;J. Med. Chem. 2013, 56, 4028),如2-芳基苯并噁唑类化合物已经用于治疗阿尔兹海默(Alzheimer)疾病的研究 (参见:J. Med. Chem. 2012, 55, 9136;Chem. Soc. Rev.2013, 42, 7747)。另外由于2-芳基苯并噁(噻)唑在荧光方面的性质,已经应用于金属铱的光敏催化剂中,对于某些特异性的反应有优异催化性能(参见:J. Am. Chem. Soc. 2015,137, 9551;Chem. Commun. 2014, 50, 10409)。目前合成2-芳基苯并噁(噻)唑的方法有两类。一类是通过过渡金属催化苯并噁(噻)唑与溴(碘)代芳基金属有机试剂偶联制备。这类方法需要使用比较昂贵的贵金属催化剂和有机试剂(参见:Heterocycles 2011, 83,1371;Chem. Commun. 2010, 46, 2471;Org. Lett. 2014, 16, 984;J. Am. Chem. Soc.2012, 134, 169;Org. Lett. 2015, 17, 4926;J. Am. Chem. Soc. 2007, 129, 12404)。另一类是通过2-氨基苯酚(苯硫酚)和苯甲醇、苯甲醛、苯甲酸缩合,其中与苯甲醇的合成需要用到过渡金属(参见:ACS Catal. 2014, 4, 1686;Org. Lett. 2009, 11, 2039);而使用苯甲酸则有需要用到多聚磷酸后,处理复杂等缺点(参见:J. Heterocyclic Chem.2002, 39, 421)。使用苯甲醛作为合成2-芳基苯并噁唑的原料的路线需要用到当量的氧化剂,比如价格昂贵的醋酸碘苯,2,3-二氯-5,6-二氰对苯醌(DDQ)等计量氧化剂。目前有几例使用分子氧作为该过程中的氧化剂,需要使用昂贵的4-甲氧基-2,2,6,6-四甲基-哌啶-氮氧自由基(4-MeO-TEMPO)(参见:Angew. Chem. Int. Ed. 2008, 47, 9330.),或者是具有高毒性,高风险性的氰盐(如氰化钾,氰化钠)。由于此类化合物在医药领域的应用广泛,因此有必要开发新的廉价的催化体系获得该类重要的化合物。
发明内容
现有技术常使用昂贵的醋酸碘苯,4-甲氧基-2,2,6,6-四甲基-哌啶-氮氧自由基,高毒性氰化钠,氰化钾等,不适合大量应用,有鉴于此,本发明的目的在于提供一种便宜易得,安全绿色的催化剂,利用空气或者氧气作为氧化剂合成2-芳基苯并噁(噻)唑及其衍生物。
本发明提供如下技术方案:
本发明的以空气或者氧气作为氧化剂代替传统的DDQ,醋酸碘苯等昂贵的氧化剂,具体地,本发明的2-芳基苯并噁唑,2-芳基苯并噻唑类化合物的制备方法,如反应式A所示,具体步骤为:
(1)将2-氨基苯酚(或2-氨基硫酚)和苯甲醛按照物质的量比0.9:1~1:1.2的比例溶解在二甲苯溶剂中,100-130℃下搅拌反应10到30分钟,用薄层色谱(TLC)检测是否完全生成希夫碱中间体;
(2)加入催化剂咪唑盐和碳酸钾,敞开体系,继续100-130℃反应10到24小时,反应结束后减压旋干溶剂,粗产物用柱层析分离,即得到2-芳基苯并噁唑(或2-芳基苯并噻唑)类化合物;其中,所述的碳酸钾为反应底物的25%~50%摩尔当量,咪唑盐为反应底物的10%~20%摩尔当量。
反应式:
。
优选的,所述的有机溶剂为甲苯、三甲苯、邻二甲苯、间二甲苯、对二甲苯、或其混合溶液。
优选的,所述的催化剂咪唑盐选自下述结构式中的一种:
。
优选的,所述的碱为碳酸钾、碳酸钠、碳酸铯、碳酸氢钠等。
优选的,所述的氧化剂为空气或氧气。
本反应采用便宜易得的咪唑盐和常用碱作为催化剂,利用空气或者氧气作为氧化剂,方便高效的合成2-芳基苯并噁(噻)唑,大大降低了生产成本,适合工业化应用。
具体实施方式
下面将对本发明实施例中的技术方案进行详细的描述,显然所描述的实例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做过创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1、5-甲基-2-苯基苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 苯甲醛0.530g,15ml二甲苯,在120℃下搅拌15分钟,用TLC检测反应完毕后,加入1 mmol 咪唑盐(4)174mg、1.25mmol碳酸钾175mg,反应10小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于0.888 g,产率大于85%。
产物结构式(I)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.24 (d, J = 3.6 Hz, 2H), 7.54 (d, J = 9.1 Hz,1H), 7.49 (s, 3H), 7.42 (d, J = 8.3 Hz, 1H), 7.12 (d, J = 8.2 Hz, 1H), 2.46(s, 3H); 13C NMR (101 MHz, CDCl3) δ 163.04, 148.96, 142.29, 134.30, 131.30,128.81, 127.50, 127.29, 126.17, 119.89, 109.89, 21.49. MS m/z (relativeintensity, %): 209 (100)。
实施例2、2-(3-溴苯基)-5-甲基-苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 3-溴苯甲醛0.925g,15ml二甲苯,在120℃下搅拌30分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(5) 109mg、1.25mmol碳酸钾175mg,反应15小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.31 g,产率大于85%。
产物结构式(II)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.38 (t, J = 1.5 Hz, 1H), 8.15 (d, J = 7.8 Hz,1H), 7.63 (d, J = 8.0 Hz, 1H), 7.54 (s, 1H), 7.44 (d, J = 8.3 Hz, 1H), 7.37(t, J = 7.9 Hz, 1H), 7.17 (d, J = 8.3 Hz, 1H), 2.48 (s, 3H); 13C NMR (101 MHz,CDCl3) δ 161.48, 148.97, 142.05, 134.63, 134.19, 130.37, 129.17, 126.66,125.94, 122.94, 120.04, 110.01, 21.51; HRMS (ESI) Calcd for C14H11BrNO: (M+H+)288.0024 (100.0%), 290.0004 (97.3%), found: 288.0018 (100.0%), 289.9999(97.3%)。
实施例3、5-氯-2-(甲氧基苯基)-苯并噁唑
向50ml 反应管中加入5mmol的4-氯-2-氨基苯酚 0.615g 和5 mmol 2-甲氧基苯甲醛0.680g,15ml二甲苯,在120℃下搅拌10分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(5) 109mg、1.25mmol碳酸钾175mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.10 g,产率大于85%。
产物结构式(III)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.10 (d, J = 7.5 Hz, 1H), 7.78 (d, J = 1.0 Hz,1H), 7.52 – 7.45 (m, 2H), 7.28 (dd, J = 8.6, 1.5 Hz, 1H), 7.11 – 7.03 (m,2H), 3.99 (s, 3H);13C NMR(101 MHz, CDCl3) δ162.92, 158.50, 148.89, 143.24,133.15, 131.31, 129.66, 125.13, 120.71, 120.03, 115.59, 112.06, 111.14,56.15. HRMS (ESI) Calcd for C14H11ClNO2 : (M+H+) 260.0478 (100.0%), found:260.0473 (100.0%)。
实施例4、 5-甲基-2-(2-噻吩)苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 噻吩-2-甲醛0.560g,15ml二甲苯,在120℃下搅拌30分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(5) 109mg、1.25mmol碳酸钾175mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于0.860 g,产率大于80%。
产物结构式(IV)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 7.90 (dd, J = 3.7, 1.1 Hz, 1H), 7.55 (dd, J =5.0, 1.1 Hz, 1H), 7.52 (s, 1H), 7.42 (d, J = 8.3 Hz, 1H), 7.19 (dd, J = 5.0,3.8 Hz, 1H), 7.15 (dd, J = 8.3, 1.1 Hz, 1H), 2.48 (s, 3H); 13C NMR (101 MHz,CDCl3) δ 159.06, 148.63, 142.16, 134.50, 129.96, 129.81, 129.66, 128.15,126.12, 119.68, 109.71, 21.46; MS m/z (relative intensity, %): 215 (100), 186(10), 106 (15), 78(30)。
实施例5、 5-硝基-2-苯基苯并噁唑
向50ml 反应管中加入5mmol的4-硝基-2-氨基苯酚 0.77g 和5 mmol 苯甲醛0.530g,15ml二甲苯,在120℃下搅拌45分钟,用TLC检测反应完毕后,加入1mmol 咪唑盐(8) 223mg、2.5mmol碳酸钾350mg,反应16小时后,将溶液减压旋干,然后用PE/EA 重结晶得到红砖色固体0.730 g,产率大于50%。
产物结构式(V)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.05 (d, J = 8.1 Hz, 1H), 7.86 (d, J = 7.9 Hz,1H), 7.67 (d, J = 3.5 Hz, 1H), 7.50 (dd, J = 14.5, 6.6 Hz, 2H), 7.38 (t, J =7.6 Hz, 1H), 7.19 – 7.09 (m, 1H); 13C NMR (101 MHz, CDCl3) δ 161.35, 153.66,137.31, 134.66, 129.25, 128.57, 128.00, 126.39, 125.19, 122.94, 121.41; MS m/z (relative intensity, %): 240 (100)。
实施例6、 5-甲基-2-(2-吡啶基)苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 2-吡啶甲醛0.535g,15ml二甲苯,在120℃下搅拌15分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(8) 112mg、1.25mmol碳酸钾175 mg反应18小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于0.493g,产率大于47%。
产物结构式(VI)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.81 (dd, J = 3.9, 0.8 Hz, 1H), 8.33 (dd, J =7.9, 0.9 Hz, 1H), 7.87 (td, J = 7.8, 1.7 Hz, 1H), 7.57 (d, J = 22.0 Hz, 1H),7.51 (t, J = 15.2 Hz, 1H), 7.43 (ddd, J = 7.5, 4.8, 1.1 Hz, 1H), 7.21 (d, J =8.3 Hz, 1H), 2.49 (s, 3H); 13C NMR (101 MHz, CDCl3) δ 161.42, 150.15, 149.22,146.09, 141.90, 136.93, 134.71, 127.16, 125.32, 123.24, 120.36, 110.47,21.43; MS m/z (relative intensity, %): 210 (100), 106 (21), 78(49)。
实施例7、 2-(2-甲氧基苯基)-5-甲基苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 2-甲氧基苯甲醛0.680g,15ml二甲苯,在120℃下搅拌10分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(6) 133mg、1.25mmol碳酸钾175mg,反应10小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.075 g,产率大于90%。
产物结构式(VII)
表征数据如下:
1H NMR(400 MHz, CDCl3) δ 8.15 (dd, J = 7.7, 1.5 Hz, 1H), 7.63 (s, 1H),7.55 – 7.44 (m, 2H), 7.15 (dd, J = 19.4, 8.3 Hz, 2H), 7.11 – 7.06 (m, 1H),4.03 (d, J = 2.3 Hz, 3H), 2.50 (s, 3H);13C NMR (101 MHz, CDCl3) δ 161.62,158.35, 148.57, 142.30, 133.99, 132.58, 131.22, 126.01, 120.65, 120.05,116.33, 112.02, 109.77, 56.15, 21.49; MS m/z (relative intensity, %): 239(100)。
实施例8、 2-(2-溴苯基)-5-甲基苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 2-溴苯甲醛0.920g,15ml二甲苯,在120℃下搅拌30分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(6) 133mg、1.25mmol碳酸钾175mg,反应16小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.148 g,产率大于80%。
产物结构式(VIII)
表征数据如下:
1H NMR(400 MHz, CDCl3) δ 8.06 (dd, J = 7.8, 1.7 Hz, 1H), 7.77 (dd, J =8.0, 0.9 Hz, 1H), 7.64 (s, 1H), 7.53 – 7.43 (m, 2H), 7.36 (td, J = 7.8, 1.7Hz, 1H), 7.21 (dd, J = 8.3, 1.1 Hz, 1H), 2.50 (s, 3H);13C NMR (101 MHz, CDCl3)δ 161.59, 148.88, 141.79, 134.61, 134.49, 132.08, 131.85, 128.53, 127.39,126.70, 121.83, 120.34, 110.11. MS m/z (relative intensity, %): 287 (100), 78(86)。
实施例9、 2-(2-甲基苯基)-5-甲基苯并噁唑
向50ml 反应管中加入5mmol的4-甲基-2-氨基苯酚 0.615g 和5 mmol 2-甲基苯甲醛0.600g,15ml二甲苯,在120℃下搅拌15分钟,用TLC检测反应完毕后,加入0.5mmol 咪唑盐(6) 133mg、1.25mmol碳酸钾175mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.148 g,产率大于80%。
产物结构式(IX)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.20 (d, J = 8.3 Hz, 1H), 7.63 (s, 1H), 7.48(d, J = 8.3 Hz, 1H), 7.42 (d, J = 6.8 Hz, 1H), 7.40 – 7.34 (m, 2H), 7.19 (d,J = 8.2 Hz, 1H), 2.85 (s, 3H), 2.53 (s, 3H);13C NMR (101 MHz, CDCl3) δ 163.49,148.53, 142.33, 138.73, 134.11, 131.74, 130.74, 129.86, 126.39, 126.09,126.00, 120.04, 109.80, 22.21, 21.50; MS m/z (relative intensity, %): 223(100)。
实施例10、 2-(4-叔丁基苯基)-5-甲基苯并噁唑
向50ml 反应管中加入10mmol的4-甲基-2-氨基苯酚 1.230g 和10 mmol 4-叔丁基苯甲醛1.63g,30ml二甲苯,在120℃下搅拌30分钟,用TLC检测反应完毕后,加入1.0mmol 咪唑盐(6) 266mg、2.5mmol碳酸钾350mg,反应18小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于2.38 g,产率大于90%。
产物结构式(X)
表征数据如下:
1H NMR(400 MHz, CDCl3) δ 8.19 (d, J = 7.5 Hz, 2H), 7.56 (d, J = 8.6 Hz,3H), 7.45 (t, J = 7.0 Hz, 1H), 7.16 (d, J = 8.0 Hz, 1H), 2.50 (s, 3H), 1.39(s, 9H);13C NMR (101 MHz, CDCl3) δ 163.27, 154.90, 148.93, 142.40, 134.19,127.36, 125.91, 125.81, 124.51, 119.77, 109.81, 35.00, 31.12, 21.48; MS m/z(relative intensity, %): 250 (100)。
实施例11、 2-(4-甲氧基苯基)-5-甲基苯并噁唑
向50ml 反应管中加入10mmol的4-甲基-2-氨基苯酚 1.230g 和10 mmol 4-甲氧基苯甲醛1.36g,30ml二甲苯,在120℃下搅拌15分钟,用TLC检测反应完毕后,加入1.0mmol 咪唑盐(6) 266mg、2.5mmol碳酸钾350mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.912 g,产率大于80%。
产物结构式(XI)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.18 (d, J = 8.9 Hz, 2H), 7.54 (d, J = 11.4 Hz,1H), 7.42 (d, J = 8.3 Hz, 1H), 7.39 (t, J = 21.1 Hz, 1H), 7.10 (t, J = 15.8Hz, 1H), 7.06 – 6.96 (m, 2H), 3.88 (t, J = 1.7 Hz, 3H), 2.49 (s, 3H); 13C NMR(101 MHz, CDCl3) δ 163.20, 162.17, 148.87, 142.45, 134.12, 129.24, 125.61,119.86, 119.54, 114.26, 109.67, 55.36, 21.46; MS m/z (relative intensity, %):239 (100), 210(61), 134 (55), 118(38)。
实施例12、2-(2-氯苯基)-5-甲基苯并噁唑
向50ml 反应管中加入10mmol的4-甲基-2-氨基苯酚 1.23g 和10 mmol 2-氯苯甲醛1.40g,30ml二甲苯,在120℃下搅拌10分钟,用TLC检测反应完毕后,加入1mmol 咪唑盐(8)0.226g、2.5mmol碳酸钾0.350mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于2.38g,产率大于98%。
产物结构式(XII)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.30 – 8.03 (m, 1H), 7.75 – 7.37 (m, 5H), 7.25– 7.10 (m, 1H), 2.51 (d, J = 4.5 Hz, 3H); 13C NMR (101 MHz, CDCl3) δ 160.99,148.83, 141.87, 134.44, 133.37, 131.72, 131.30, 126.83, 126.68, 126.40,120.30, 110.04, 77.34, 77.02, 76.70, 30.85, 21.47; MS m/z (relativeintensity, %): 243 (100)。
实施例13、 2-(2-噻吩)苯并噁唑
向50ml 反应管中加入10mmol的2-氨基苯硫酚 1.25g 和10 mmol 2-噻吩甲醛1.12g,30ml二甲苯,在120℃下搅拌30分钟,用TLC检测反应完毕后,加入1mmol 咪唑盐(8) 224mg、2.5mmol碳酸钾350mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.52 g,产率大于70%。
产物结构式(XIII)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 8.05 (d, J = 8.1 Hz, 1H), 7.86 (d, J = 7.9 Hz,1H), 7.67 (d, J = 3.5 Hz, 1H), 7.50 (dd, J = 14.5, 6.6 Hz, 2H), 7.38 (t, J =7.6 Hz, 1H), 7.19 – 7.09 (m, 1H); 13C NMR (101 MHz, CDCl3) δ 161.35, 153.66,137.31, 134.66, 129.25, 128.57, 128.00, 126.39, 125.19, 122.94, 121.41; MS m/z (relative intensity, %): 217 (100), 108(30)。
实施例14、 2-(2-羟基苯基)苯并噻唑
向50ml 反应管中加入10mmol的2-氨基苯硫酚 1.25g 和10 mmol 2-羟基苯甲醛1.22g,30ml二甲苯,在120℃下搅拌10分钟,用TLC检测反应完毕后,加入1mmol 咪唑盐(8)224mg、2.5mmol碳酸钾350mg,反应12小时后,将溶液减压旋干,然后所得粗产物用柱层析分离得到产物大于1.92g,产率大于85%。
产物结构式(XIV)
表征数据如下:
1H NMR (400 MHz, CDCl3) δ 11.54 (s, 1H), 8.01 (dd, J = 7.9, 1.6 Hz, 1H),7.52 (s, 1H), 7.49 – 7.40 (m, 2H), 7.18 (dd, J = 8.3, 1.0 Hz, 1H), 7.13 (dd,J = 8.4, 0.7 Hz, 1H), 7.06 – 6.96 (m, 1H), 2.50 (s, 3H); 13C NMR (101 MHz,CDCl3) δ 162.92, 158.62, 147.33, 140.13, 134.89, 133.36, 127.00, 126.42,119.47, 119.15, 117.33, 110.70, 109.97, 21.46; MS m/z (relative intensity,%): 227 (100), 199 (27)。
综上所述,本发明采用便宜易制得的N-杂环咪唑盐和碳酸钾原位生成的卡宾作为催化剂,并且利用空气或者氧气作为氧化剂,成功实现制备2-芳基苯并噁(噻)唑类化合物,并对于各种芳香醛普遍有很好的反应结果。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或者基本情况下,能够以其他的形式实现本发明。因此无论从哪一点来看,均应将实施例看做是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方案仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为了清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
Claims (3)
1.一种2-芳基苯并噁唑、2-芳基苯并噻唑类化合物的制备方法,其特征在于,具体步骤为:
(1)将2-氨基苯酚或2-氨基硫酚,和苯甲醛按照物质的量比0.9:1~1:1.2的比例溶解在二甲苯溶剂中,100-130℃下搅拌反应,生成希夫碱中间体;
(2)反应完毕后,加入催化剂咪唑盐和碳酸钾,敞开体系反应,反应结束后旋干溶剂,粗产物用柱层析分离,即得到对应的2-芳基苯并噁唑类化合物或2-芳基苯并噻唑类化合物;其中,所述的碳酸钾为反应底物的25%~50%摩尔当量,咪唑盐为反应底物的10%~20%摩尔当量。
2.根据权利要求1所述的2-芳基苯并噻唑类化合物的制备方法,其特征在于,所述的有机溶剂为邻二甲苯/间二甲苯/对二甲苯的混合溶液。
3.根据权利要求1所述的2-芳基苯并噻唑类化合物的制备方法,其特征在于,所述的催化剂咪唑盐选自下述结构式中的一种:
。
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