CN116768812A - 一种多取代2,5-二氢恶唑类化合物的合成方法 - Google Patents
一种多取代2,5-二氢恶唑类化合物的合成方法 Download PDFInfo
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- -1 polysubstituted 2, 5-dihydro-oxazole compound Chemical class 0.000 title claims description 13
- 238000001308 synthesis method Methods 0.000 title claims description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 16
- 238000004440 column chromatography Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000003208 petroleum Substances 0.000 claims description 8
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 claims description 8
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 125000003107 substituted aryl group Chemical group 0.000 claims description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 4
- 125000001624 naphthyl group Chemical group 0.000 claims description 4
- VNDYJBBGRKZCSX-UHFFFAOYSA-L zinc bromide Chemical compound Br[Zn]Br VNDYJBBGRKZCSX-UHFFFAOYSA-L 0.000 claims description 4
- 125000001424 substituent group Chemical group 0.000 claims description 3
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- FKOASGGZYSYPBI-UHFFFAOYSA-K bis(trifluoromethylsulfonyloxy)alumanyl trifluoromethanesulfonate Chemical compound [Al+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F FKOASGGZYSYPBI-UHFFFAOYSA-K 0.000 claims description 2
- 238000001311 chemical methods and process Methods 0.000 claims description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 2
- SBTSVTLGWRLWOD-UHFFFAOYSA-L copper(ii) triflate Chemical compound [Cu+2].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F SBTSVTLGWRLWOD-UHFFFAOYSA-L 0.000 claims description 2
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- XSVCYDUEICANRJ-UHFFFAOYSA-K dysprosium(3+);trifluoromethanesulfonate Chemical compound [Dy+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F XSVCYDUEICANRJ-UHFFFAOYSA-K 0.000 claims description 2
- GLQOFBCJADYRKR-UHFFFAOYSA-K erbium(3+);trifluoromethanesulfonate Chemical compound [Er+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F GLQOFBCJADYRKR-UHFFFAOYSA-K 0.000 claims description 2
- TWNOVENTEPVGEJ-UHFFFAOYSA-K europium(3+);trifluoromethanesulfonate Chemical compound [Eu+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F TWNOVENTEPVGEJ-UHFFFAOYSA-K 0.000 claims description 2
- 125000005843 halogen group Chemical group 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- PGJLOGNVZGRMGX-UHFFFAOYSA-L iron(2+);trifluoromethanesulfonate Chemical compound [Fe+2].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F PGJLOGNVZGRMGX-UHFFFAOYSA-L 0.000 claims description 2
- 239000012046 mixed solvent Substances 0.000 claims description 2
- KVRSDIJOUNNFMZ-UHFFFAOYSA-L nickel(2+);trifluoromethanesulfonate Chemical compound [Ni+2].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F KVRSDIJOUNNFMZ-UHFFFAOYSA-L 0.000 claims description 2
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- SVOOVMQUISJERI-UHFFFAOYSA-K rhodium(3+);triacetate Chemical compound [Rh+3].CC([O-])=O.CC([O-])=O.CC([O-])=O SVOOVMQUISJERI-UHFFFAOYSA-K 0.000 claims description 2
- HZXJVDYQRYYYOR-UHFFFAOYSA-K scandium(iii) trifluoromethanesulfonate Chemical compound [Sc+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F HZXJVDYQRYYYOR-UHFFFAOYSA-K 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- JLYAVYSVLLIWEK-UHFFFAOYSA-K terbium(3+);trifluoromethanesulfonate Chemical compound [Tb+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F JLYAVYSVLLIWEK-UHFFFAOYSA-K 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- PBASUZORNBYVFM-UHFFFAOYSA-K thulium(3+);trifluoromethanesulfonate Chemical compound [Tm+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F PBASUZORNBYVFM-UHFFFAOYSA-K 0.000 claims description 2
- AHZJKOKFZJYCLG-UHFFFAOYSA-K trifluoromethanesulfonate;ytterbium(3+) Chemical compound [Yb+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F AHZJKOKFZJYCLG-UHFFFAOYSA-K 0.000 claims description 2
- 229940102001 zinc bromide Drugs 0.000 claims description 2
- CITILBVTAYEWKR-UHFFFAOYSA-L zinc trifluoromethanesulfonate Chemical compound [Zn+2].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F CITILBVTAYEWKR-UHFFFAOYSA-L 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 4
- NHZLLKNRTDIFAD-UHFFFAOYSA-N 2,5-dihydro-1,3-oxazole Chemical class C1OCN=C1 NHZLLKNRTDIFAD-UHFFFAOYSA-N 0.000 abstract description 10
- 230000002194 synthesizing effect Effects 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 2
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- 238000001460 carbon-13 nuclear magnetic resonance spectrum Methods 0.000 description 6
- 239000012043 crude product Substances 0.000 description 6
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- 230000008020 evaporation Effects 0.000 description 6
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- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000000926 separation method Methods 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
- 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
- JNPGUXGVLNJQSQ-BGGMYYEUSA-M (e,3r,5s)-7-[4-(4-fluorophenyl)-1,2-di(propan-2-yl)pyrrol-3-yl]-3,5-dihydroxyhept-6-enoate Chemical compound CC(C)N1C(C(C)C)=C(\C=C\[C@@H](O)C[C@@H](O)CC([O-])=O)C(C=2C=CC(F)=CC=2)=C1 JNPGUXGVLNJQSQ-BGGMYYEUSA-M 0.000 description 1
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- IIEJGTQVBJHMDL-UHFFFAOYSA-N 2-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-5-[2-oxo-2-[3-(sulfamoylamino)pyrrolidin-1-yl]ethyl]-1,3,4-oxadiazole Chemical compound C1CN(CC1NS(=O)(=O)N)C(=O)CC2=NN=C(O2)C3=CN=C(N=C3)NC4CC5=CC=CC=C5C4 IIEJGTQVBJHMDL-UHFFFAOYSA-N 0.000 description 1
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- CONKBQPVFMXDOV-QHCPKHFHSA-N 6-[(5S)-5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-2-oxo-1,3-oxazolidin-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C[C@H]1CN(C(O1)=O)C1=CC2=C(NC(O2)=O)C=C1 CONKBQPVFMXDOV-QHCPKHFHSA-N 0.000 description 1
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- 238000000806 fluorine-19 nuclear magnetic resonance spectrum Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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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 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D261/00—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings
- C07D261/02—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings
- C07D261/04—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
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- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
专利说明书摘要本发明公开了一种基于2H‑氮丙啶类化合物合成多取代2,5‑二氢恶唑类化合物的方法,属有机化学领域。该方法以2H‑氮丙啶、丙酮为底物,在溶剂、催化剂、56℃下,通过两组分反应,合成了一系列多取代2,5‑二氢恶唑类化合物。
Description
技术领域
本发明属于有机合成技术领域,具体涉及一种基于2H-氮丙啶类化合物合成多取代2,5-二氢恶唑类化合物的方法。
背景技术
2,5-二氢恶唑类化合物是一类重要的有机分子,是许多生物活性物质的关键结构单元。在食品化学中,各种取代的 2,5-二氢恶唑被用作人造食品香(Agric. Food Chem.2014, 62, 6487.);还可以作为有机农药合成的中间体,用于高价值作物的保护(PestManage. Sci. 2013, 69, 1106.)等。
2,5-二氢恶唑类化合物具有复杂的杂环体系,通过普适方法合成较为困难,尤其是具有多取代基的2,5-二氢恶唑类化合物的合成。在此背景下,已有的2,5-二氢恶唑类化合物得合成方法如:通过在金属催化下烯基叠氮类化合物的自身环化合成多取代2,5-二氢恶唑类化合物(Org. Lett. 2020, 22, 4766.);通过在路易斯酸的催化下环氧乙烷与腈类化合物反应生成多取代2,5-二氢恶唑类化合物(Org. Lett. 2015, 17, 2685.),但反应物难以保存。因此,发明一种经济实用的多取代2,5-二氢恶唑类化合物的合成方法具有重要研究价值。
发明内容
本发明合成的多取代2,5-二氢恶唑不仅是许多生物活性分子的核心骨架,也是有机合成中的重要合成子。因此,拓展新型多取代2,5-二氢恶唑类化合物的范围,实现生物活性分子的高效合成具有重要研究意义。
为了实现上述目的,本发明提供了一种多取代2,5-二氢恶唑类化合物的合成方法,所述多取代2,5-二氢恶唑类化合物具有式Ⅰ所示结构:
其中,R1选自芳基、取代芳基、萘基的任意一种。
R2选自芳基、取代芳基、萘基中的任意一种。
所述取代芳基的取代基为卤素原子、烷氧基、饱和烷基的任意一种。
该方法包括:氮气保护下,向干燥反应器中依次加入2H-氮丙啶、催化剂、丙酮以及溶剂,一定温度下搅拌至反应完毕,经柱层析分离可得到多取代2,5-二氢恶唑类化合物,其化学过程见反应式Ⅱ:
所述催化剂选自氯化铜、氯化铁、醋酸铑、醋酸锌、溴化锌、碘化铜、三氟甲磺酸锌、三氟甲磺酸铜、三氟甲磺酸钪、三氟甲磺酸镍、三氟甲磺酸铽、三氟甲磺酸铕、三氟甲磺酸镝、三氟甲磺酸铒、三氟甲磺酸铥、三氟甲磺酸镱、三氟甲磺酸铁、三氟甲磺酸铝、三氟甲磺酸中的任意一种。
所述溶剂选自1,4-二氧六环、二氯乙烷、乙腈、四氢呋喃、二甲基乙酰胺、二氯甲烷、乙酸乙酯、甲苯、二甲基亚砜、氯仿、1,1,2,2-四氯乙烷、氯苯中的任意一种。
所述的2 H-氮丙啶、丙酮、催化剂的摩尔比为1:130:0.2。
所述反应时间为24-72h。
所述反应温度为56-65℃。
在反应后用石油醚和乙酸乙酯的混合溶剂进行柱层析分离。
本发明的有益效果为:本发明提供了一种多取代2,5-二氢恶唑类化合物的合成方法科学合理,具有收率高、底物适用面广、操作简单、后处理方便等优点。
附图说明
图1为实施例1的1H NMR图谱;图2为实施例1的13C NMR图谱。
图3为实施例2的1H NMR图谱;图4为实施例2的13C NMR图谱。
图5为实施例3的1H NMR图谱;图6为实施例3的13C NMR图谱。
图7为实施例4的1H NMR图谱;图8为实施例4的13C NMR图谱。
图9为实施例5的1H NMR图谱;图10为实施例5的13C NMR图谱。
图11为实施例6的1H NMR图谱;图12为实施例6的13C NMR图谱,图13为实施例6的19FNMR图谱。
具体实施方式
在本文中通过具体实施例对本发明的方法进行说明,但本发明并不局限于此,在本发明的技术构思范围内,进行任何的修改、等同替换和改进等,均应包括在本发明的保护范围之内。
实例1:
反应方程式如下:
氮气保护下,将化合物1a(0.1mmol)加入干燥的反应器之中,再加入2a(1mL)和TfOH(0.003g,1.8μL),在56℃下反应48小时。完成反应后,溶剂用旋转蒸发器蒸发浓缩得到粗产品。用石油醚和乙酸乙酯的混合液从50:1至10:1梯度进行柱层析分离得到纯1aa,产率为74%。
1aa的核磁数据如下:
1H NMR (400 MHz, CDCl3) δ 7.67 – 7.60 (m, 2H), 7.37 – 7.25 (m, 8H),6.12 (s, 1H), 1.70 (s, 3H), 1.60 (s, 3H).。
13C NMR (150 MHz, CDCl3) δ 165.73, 139.00, 131.14, 130.82, 128.99,128.64, 128.55, 128.44, 128.34, 108.97, 87.41, 28.66, 27.98.。
实例2:
反应方程式如下:
氮气保护下,将化合物1b(0.1mmol)加入干燥的反应器之中,再加入2a(1mL)和TfOH(0.003g,1.8μL),在56℃下反应48小时。完成反应后,溶剂用旋转蒸发器蒸发浓缩得到粗产品。用石油醚和乙酸乙酯的混合液从50:1至10:1梯度进行柱层析分离得到纯1ba,产率为75%。
1ba的核磁数据如下:
1H NMR (600 MHz, CDCl3) δ 7.49 (d, J = 8.5 Hz, 2H), 7.41 (d, J = 8.7Hz, 2H), 7.37 – 7.27 (m, 5H), 6.07 (s, 1H), 1.68 (s, 3H), 1.58 (s, 3H).。
13C NMR (150 MHz, CDCl3) δ 164.83, 138.64, 131.69, 130.02, 129.08,128.82, 128.28, 125.43, 109.06, 87.26, 28.57, 27.82.。
实例3:
反应方程式如下:
氮气保护下,将化合物1c(0.1mmol)加入干燥的反应器之中,再加入2a(1mL)和TfOH(0.003g,1.8μL),在56℃下反应48小时。完成反应后,溶剂用旋转蒸发器蒸发浓缩得到粗产品。用石油醚和乙酸乙酯的混合液从50:1至10:1梯度进行柱层析分离得到纯1ca,产率为72%。
1ca的核磁数据如下:
1H NMR (600 MHz, CDCl3) δ 7.52 (d, J = 8.3 Hz, 2H), 7.34 – 7.28 (m,5H), 7.09 – 7.07 (m, 2H), 6.09 (s, 1H), 2.30 (s, 3H), 1.68 (s, 3H), 1.58 (s,3H).。
13C NMR (150 MHz, CDCl3) δ 165.57, 141.14, 139.17, 129.14, 128.94,128.55, 128.51, 128.38, 128.34, 108.87, 87.36, 28.67, 27.99, 21.45.。
实例4:
反应方程式如下:
氮气保护下,将化合物1d(0.1mmol)加入干燥的反应器之中,再加入2a(1mL)和TfOH(0.003g,1.8μL),在56℃下反应48小时。完成反应后,溶剂用旋转蒸发器蒸发浓缩得到粗产品。用石油醚和乙酸乙酯的混合液从50:1至10:1梯度进行柱层析分离得到纯1da,产率为79%。
1da的核磁数据如下:
1H NMR (600 MHz, CDCl3) δ 7.96 – 7.94 (m, 1H), 7.88 (dd, J = 8.6, 1.7Hz, 1H), 7.76 (d, J = 8.5 Hz, 2H), 7.69 (dd, J = 8.1, 1.2 Hz, 1H), 7.47 (ddd,J = 8.2, 6.8, 1.3 Hz, 1H), 7.42 (ddd, J = 8.0, 6.7, 1.3 Hz, 1H), 7.39 – 7.36(m, 2H), 7.35 – 7.31 (m, 2H), 7.29 – 7.24 (m, 1H), 6.24 (s, 1H), 1.73 (s,3H), 1.63 (s, 3H).。
13C NMR (150 MHz, CDCl3) δ 165.80, 139.14, 134.33, 132.64, 129.41,129.03, 128.82, 128.69, 128.58, 128.38, 128.25, 127.71, 127.49, 126.49,125.03, 109.07, 87.47, 28.72, 28.06.。
实例5:
反应方程式如下:
氮气保护下,将化合物1e(0.1mmol)加入干燥的反应器之中,再加入2a(1mL)和TfOH(0.003g,1.8μL),在56℃下反应48小时。完成反应后,溶剂用旋转蒸发器蒸发浓缩得到粗产品。用石油醚和乙酸乙酯的混合液从50:1至10:1梯度进行柱层析分离得到纯1ea,产率为70%。
1ea的核磁数据如下:
1H NMR (600 MHz, CDCl3) δ 7.65 – 7.62 (m, 2H), 7.36 – 7.33 (m, 1H),7.28 (dd, J = 8.3, 6.9 Hz, 2H), 7.21 – 7.18 (m, 2H), 7.13 (d, J = 7.8 Hz,2H), 6.09 (s, 1H), 2.31 (s, 3H), 1.67 (s, 3H), 1.58 (s, 3H).。
13C NMR (150 MHz, CDCl3) δ 165.81, 138.41, 136.08, 131.24, 130.74,129.66, 128.54, 128.40, 128.22, 108.74, 87.19, 28.68, 27.98, 21.23.。
实例6:
反应方程式如下:
氮气保护下,将化合物1f(0.1mmol)加入干燥的反应器之中,再加入2a(1mL)和TfOH(0.003g,1.8μL),在56℃下反应48小时。完成反应后,溶剂用旋转蒸发器蒸发浓缩得到粗产品。用石油醚和乙酸乙酯的混合液从50:1至10:1梯度进行柱层析分离得到纯1fa,产率为60%。
1fa的核磁数据如下:
1H NMR (400 MHz, CDCl3) δ 7.62 – 7.59 (m, 2H), 7.36 – 7.27 (m, 5H),7.04 – 6.99 (m, 2H), 6.10 (s, 1H), 1.67 (s, 3H), 1.57 (s, 3H).。
13C NMR (150 MHz, CDCl3) δ 165.51, 135.00, 130.92, 130.09, 130.03,128.49, 116.05, 115.91, 109.00, 86.51, 28.69, 27.89.。
19F NMR (565 MHz, CDCl3) δ -113.13.。
由上述实例可以看出,按照本发明所述,可以对多取代2,5-二氢恶唑类化合物进行多样化高效合成。
Claims (9)
1.一种多取代2,5-二氢恶唑类化合物的合成方法,所述多取代2,5-二氢恶唑类化合物具有式Ⅰ所示结构:
2.其中,R1选自芳基、取代芳基、萘基的任意一种;
R2选自芳基、取代芳基、萘基中的任意一种。
3.取代芳基的取代基为卤素原子、烷氧基、饱和烷基的任意一种。
4.该方法包括:氮气保护下,向干燥反应器中依次加入2H-氮丙啶、催化剂、丙酮以及溶剂,一定温度下搅拌至反应完毕,经柱层析分离可得到多取代2,5-二氢恶唑类化合物,其化学过程见反应式Ⅱ:
5.根据权利要求1所述的制备方法,其中,所述催化剂选自氯化铜、氯化铁、醋酸铑、醋酸锌、溴化锌、碘化铜、三氟甲磺酸锌、三氟甲磺酸铜、三氟甲磺酸钪、三氟甲磺酸镍、三氟甲磺酸铽、三氟甲磺酸铕、三氟甲磺酸镝、三氟甲磺酸铒、三氟甲磺酸铥、三氟甲磺酸镱、三氟甲磺酸铁、三氟甲磺酸铝、三氟甲磺酸中的任意一种。
6.根据权利要求1所述的制备方法,其中,所述溶剂选自1,4-二氧六环、二氯乙烷、乙腈、四氢呋喃、二甲基乙酰胺、二氯甲烷、乙酸乙酯、甲苯、二甲基亚砜、氯仿、1,1,2,2-四氯乙烷、氯苯中的任意一种。
7.根据权利要求1所述的制备方法,其中,所述2H-氮丙啶、丙酮、催化剂的摩尔比为1:130:0.2。
8.根据权利要求1所述的制备方法,其中,所述反应时间为24-72h。
9.根据权利要求1所述的制备方法,其中,用石油醚和乙酸乙酯的混合溶剂进行柱层析分离。
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