CN114805344B - 一种2-苯基咪唑环烯酮类化合物的合成方法 - Google Patents
一种2-苯基咪唑环烯酮类化合物的合成方法 Download PDFInfo
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- CN114805344B CN114805344B CN202210423585.2A CN202210423585A CN114805344B CN 114805344 B CN114805344 B CN 114805344B CN 202210423585 A CN202210423585 A CN 202210423585A CN 114805344 B CN114805344 B CN 114805344B
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- phenylimidazole
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- 238000001308 synthesis method Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 108
- 150000001875 compounds Chemical class 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 49
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 45
- 239000003960 organic solvent Substances 0.000 claims abstract description 21
- 150000003624 transition metals Chemical class 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 15
- 150000002460 imidazoles Chemical class 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 41
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical compound FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 claims description 36
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 36
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 27
- -1 imidazole compound Chemical class 0.000 claims description 23
- 230000035484 reaction time Effects 0.000 claims description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims description 17
- 239000001257 hydrogen Substances 0.000 claims description 17
- QVLTVILSYOWFRM-UHFFFAOYSA-L CC1=C(C)C(C)([Rh](Cl)Cl)C(C)=C1C Chemical class CC1=C(C)C(C)([Rh](Cl)Cl)C(C)=C1C QVLTVILSYOWFRM-UHFFFAOYSA-L 0.000 claims description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- RHQDFWAXVIIEBN-UHFFFAOYSA-N Trifluoroethanol Chemical compound OCC(F)(F)F RHQDFWAXVIIEBN-UHFFFAOYSA-N 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- LOGSONSNCYTHPS-UHFFFAOYSA-N cyclopentane-1,3-dione Chemical compound O=C1CCC(=O)C1 LOGSONSNCYTHPS-UHFFFAOYSA-N 0.000 claims description 4
- NLFBCYMMUAKCPC-KQQUZDAGSA-N ethyl (e)-3-[3-amino-2-cyano-1-[(e)-3-ethoxy-3-oxoprop-1-enyl]sulfanyl-3-oxoprop-1-enyl]sulfanylprop-2-enoate Chemical compound CCOC(=O)\C=C\SC(=C(C#N)C(N)=O)S\C=C\C(=O)OCC NLFBCYMMUAKCPC-KQQUZDAGSA-N 0.000 claims description 4
- 125000002541 furyl group Chemical group 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 4
- 125000001624 naphthyl group Chemical group 0.000 claims description 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- 125000004076 pyridyl group Chemical group 0.000 claims description 4
- 125000001424 substituent group Chemical group 0.000 claims description 4
- MMAGMBCAIFVRGJ-UHFFFAOYSA-J iridium(3+);1,2,3,4,5-pentamethylcyclopenta-1,3-diene;tetrachloride Chemical compound Cl[Ir+]Cl.Cl[Ir+]Cl.CC=1C(C)=C(C)[C-](C)C=1C.CC=1C(C)=C(C)[C-](C)C=1C MMAGMBCAIFVRGJ-UHFFFAOYSA-J 0.000 claims description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 3
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 2
- HTSGKJQDMSTCGS-UHFFFAOYSA-N 1,4-bis(4-chlorophenyl)-2-(4-methylphenyl)sulfonylbutane-1,4-dione Chemical compound C1=CC(C)=CC=C1S(=O)(=O)C(C(=O)C=1C=CC(Cl)=CC=1)CC(=O)C1=CC=C(Cl)C=C1 HTSGKJQDMSTCGS-UHFFFAOYSA-N 0.000 claims 2
- FKLJPTJMIBLJAV-UHFFFAOYSA-N Compound IV Chemical compound O1N=C(C)C=C1CCCCCCCOC1=CC=C(C=2OCCN=2)C=C1 FKLJPTJMIBLJAV-UHFFFAOYSA-N 0.000 claims 2
- XEFCWBLINXJUIV-UHFFFAOYSA-N acetic acid;iodobenzene Chemical compound CC(O)=O.CC(O)=O.IC1=CC=CC=C1 XEFCWBLINXJUIV-UHFFFAOYSA-N 0.000 claims 2
- 125000001475 halogen functional group Chemical group 0.000 claims 1
- ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 2-phenyl-1h-imidazole Chemical compound C1=CNC(C=2C=CC=CC=2)=N1 ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 0.000 abstract description 49
- 125000004122 cyclic group Chemical group 0.000 abstract description 6
- LQJQEPJLCCCAKF-UHFFFAOYSA-N IC(C(=O)O)C1=C(C=CC=C1)CC(=O)O Chemical compound IC(C(=O)O)C1=C(C=CC=C1)CC(=O)O LQJQEPJLCCCAKF-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000654 additive Substances 0.000 abstract description 3
- CLLNPYSXOIKTLL-UHFFFAOYSA-L disilver diacetate Chemical compound [Ag+].[Ag+].CC([O-])=O.CC([O-])=O CLLNPYSXOIKTLL-UHFFFAOYSA-L 0.000 abstract description 3
- 239000001632 sodium acetate Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 2
- 125000000524 functional group Chemical group 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 45
- 239000000047 product Substances 0.000 description 38
- 230000002194 synthesizing effect Effects 0.000 description 37
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 239000003480 eluent Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 15
- 239000003208 petroleum Substances 0.000 description 15
- 239000000741 silica gel Substances 0.000 description 15
- 229910002027 silica gel Inorganic materials 0.000 description 15
- 239000000203 mixture Substances 0.000 description 14
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 12
- 238000003756 stirring Methods 0.000 description 12
- ZGPRANYVOMBLFL-UHFFFAOYSA-N 2-iodo-2-phenylacetic acid Chemical compound OC(=O)C(I)C1=CC=CC=C1 ZGPRANYVOMBLFL-UHFFFAOYSA-N 0.000 description 11
- 229940126214 compound 3 Drugs 0.000 description 11
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011630 iodine Substances 0.000 description 8
- 229910052740 iodine Inorganic materials 0.000 description 8
- 229940125782 compound 2 Drugs 0.000 description 7
- DWYHDSLIWMUSOO-UHFFFAOYSA-N 2-phenyl-1h-benzimidazole Chemical compound C1=CC=CC=C1C1=NC2=CC=CC=C2N1 DWYHDSLIWMUSOO-UHFFFAOYSA-N 0.000 description 6
- 229940125904 compound 1 Drugs 0.000 description 6
- HJSLFCCWAKVHIW-UHFFFAOYSA-N cyclohexane-1,3-dione Chemical compound O=C1CCCC(=O)C1 HJSLFCCWAKVHIW-UHFFFAOYSA-N 0.000 description 6
- HZVOZRGWRWCICA-UHFFFAOYSA-N methanediyl Chemical compound [CH2] HZVOZRGWRWCICA-UHFFFAOYSA-N 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- PYRKKGOKRMZEIT-UHFFFAOYSA-N 2-[6-(2-cyclopropylethoxy)-9-(2-hydroxy-2-methylpropyl)-1h-phenanthro[9,10-d]imidazol-2-yl]-5-fluorobenzene-1,3-dicarbonitrile Chemical compound C1=C2C3=CC(CC(C)(O)C)=CC=C3C=3NC(C=4C(=CC(F)=CC=4C#N)C#N)=NC=3C2=CC=C1OCCC1CC1 PYRKKGOKRMZEIT-UHFFFAOYSA-N 0.000 description 3
- NZAARDFDMSTHAF-UHFFFAOYSA-N 2-prop-1-en-2-yl-1h-imidazole Chemical compound CC(=C)C1=NC=CN1 NZAARDFDMSTHAF-UHFFFAOYSA-N 0.000 description 3
- OJRUSAPKCPIVBY-KQYNXXCUSA-N C1=NC2=C(N=C(N=C2N1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(CP(=O)(O)O)O)O)O)I)N Chemical compound C1=NC2=C(N=C(N=C2N1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(CP(=O)(O)O)O)O)O)I)N OJRUSAPKCPIVBY-KQYNXXCUSA-N 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 229940125758 compound 15 Drugs 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- UAOUIVVJBYDFKD-XKCDOFEDSA-N (1R,9R,10S,11R,12R,15S,18S,21R)-10,11,21-trihydroxy-8,8-dimethyl-14-methylidene-4-(prop-2-enylamino)-20-oxa-5-thia-3-azahexacyclo[9.7.2.112,15.01,9.02,6.012,18]henicosa-2(6),3-dien-13-one Chemical compound C([C@@H]1[C@@H](O)[C@@]23C(C1=C)=O)C[C@H]2[C@]12C(N=C(NCC=C)S4)=C4CC(C)(C)[C@H]1[C@H](O)[C@]3(O)OC2 UAOUIVVJBYDFKD-XKCDOFEDSA-N 0.000 description 2
- SZUVGFMDDVSKSI-WIFOCOSTSA-N (1s,2s,3s,5r)-1-(carboxymethyl)-3,5-bis[(4-phenoxyphenyl)methyl-propylcarbamoyl]cyclopentane-1,2-dicarboxylic acid Chemical compound O=C([C@@H]1[C@@H]([C@](CC(O)=O)([C@H](C(=O)N(CCC)CC=2C=CC(OC=3C=CC=CC=3)=CC=2)C1)C(O)=O)C(O)=O)N(CCC)CC(C=C1)=CC=C1OC1=CC=CC=C1 SZUVGFMDDVSKSI-WIFOCOSTSA-N 0.000 description 2
- GHYOCDFICYLMRF-UTIIJYGPSA-N (2S,3R)-N-[(2S)-3-(cyclopenten-1-yl)-1-[(2R)-2-methyloxiran-2-yl]-1-oxopropan-2-yl]-3-hydroxy-3-(4-methoxyphenyl)-2-[[(2S)-2-[(2-morpholin-4-ylacetyl)amino]propanoyl]amino]propanamide Chemical compound C1(=CCCC1)C[C@@H](C(=O)[C@@]1(OC1)C)NC([C@H]([C@@H](C1=CC=C(C=C1)OC)O)NC([C@H](C)NC(CN1CCOCC1)=O)=O)=O GHYOCDFICYLMRF-UTIIJYGPSA-N 0.000 description 2
- GCTFTMWXZFLTRR-GFCCVEGCSA-N (2r)-2-amino-n-[3-(difluoromethoxy)-4-(1,3-oxazol-5-yl)phenyl]-4-methylpentanamide Chemical compound FC(F)OC1=CC(NC(=O)[C@H](N)CC(C)C)=CC=C1C1=CN=CO1 GCTFTMWXZFLTRR-GFCCVEGCSA-N 0.000 description 2
- YJLIKUSWRSEPSM-WGQQHEPDSA-N (2r,3r,4s,5r)-2-[6-amino-8-[(4-phenylphenyl)methylamino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound C=1C=C(C=2C=CC=CC=2)C=CC=1CNC1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O YJLIKUSWRSEPSM-WGQQHEPDSA-N 0.000 description 2
- STBLNCCBQMHSRC-BATDWUPUSA-N (2s)-n-[(3s,4s)-5-acetyl-7-cyano-4-methyl-1-[(2-methylnaphthalen-1-yl)methyl]-2-oxo-3,4-dihydro-1,5-benzodiazepin-3-yl]-2-(methylamino)propanamide Chemical compound O=C1[C@@H](NC(=O)[C@H](C)NC)[C@H](C)N(C(C)=O)C2=CC(C#N)=CC=C2N1CC1=C(C)C=CC2=CC=CC=C12 STBLNCCBQMHSRC-BATDWUPUSA-N 0.000 description 2
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- DJMOXMNDXFFONV-UHFFFAOYSA-N 1,3-dimethyl-7-[2-(n-methylanilino)ethyl]purine-2,6-dione Chemical compound C1=NC=2N(C)C(=O)N(C)C(=O)C=2N1CCN(C)C1=CC=CC=C1 DJMOXMNDXFFONV-UHFFFAOYSA-N 0.000 description 2
- WZZBNLYBHUDSHF-DHLKQENFSA-N 1-[(3s,4s)-4-[8-(2-chloro-4-pyrimidin-2-yloxyphenyl)-7-fluoro-2-methylimidazo[4,5-c]quinolin-1-yl]-3-fluoropiperidin-1-yl]-2-hydroxyethanone Chemical compound CC1=NC2=CN=C3C=C(F)C(C=4C(=CC(OC=5N=CC=CN=5)=CC=4)Cl)=CC3=C2N1[C@H]1CCN(C(=O)CO)C[C@@H]1F WZZBNLYBHUDSHF-DHLKQENFSA-N 0.000 description 2
- ONBQEOIKXPHGMB-VBSBHUPXSA-N 1-[2-[(2s,3r,4s,5r)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-4,6-dihydroxyphenyl]-3-(4-hydroxyphenyl)propan-1-one Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1OC1=CC(O)=CC(O)=C1C(=O)CCC1=CC=C(O)C=C1 ONBQEOIKXPHGMB-VBSBHUPXSA-N 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 2
- OBTZDIRUQWFRFZ-UHFFFAOYSA-N 2-(5-methylfuran-2-yl)-n-(4-methylphenyl)quinoline-4-carboxamide Chemical compound O1C(C)=CC=C1C1=CC(C(=O)NC=2C=CC(C)=CC=2)=C(C=CC=C2)C2=N1 OBTZDIRUQWFRFZ-UHFFFAOYSA-N 0.000 description 2
- FMKGJQHNYMWDFJ-CVEARBPZSA-N 2-[[4-(2,2-difluoropropoxy)pyrimidin-5-yl]methylamino]-4-[[(1R,4S)-4-hydroxy-3,3-dimethylcyclohexyl]amino]pyrimidine-5-carbonitrile Chemical compound FC(COC1=NC=NC=C1CNC1=NC=C(C(=N1)N[C@H]1CC([C@H](CC1)O)(C)C)C#N)(C)F FMKGJQHNYMWDFJ-CVEARBPZSA-N 0.000 description 2
- YSUIQYOGTINQIN-UZFYAQMZSA-N 2-amino-9-[(1S,6R,8R,9S,10R,15R,17R,18R)-8-(6-aminopurin-9-yl)-9,18-difluoro-3,12-dihydroxy-3,12-bis(sulfanylidene)-2,4,7,11,13,16-hexaoxa-3lambda5,12lambda5-diphosphatricyclo[13.2.1.06,10]octadecan-17-yl]-1H-purin-6-one Chemical compound NC1=NC2=C(N=CN2[C@@H]2O[C@@H]3COP(S)(=O)O[C@@H]4[C@@H](COP(S)(=O)O[C@@H]2[C@@H]3F)O[C@H]([C@H]4F)N2C=NC3=C2N=CN=C3N)C(=O)N1 YSUIQYOGTINQIN-UZFYAQMZSA-N 0.000 description 2
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- 238000010499 C–H functionalization reaction Methods 0.000 description 2
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2282—Unsaturated compounds used as ligands
- B01J31/2295—Cyclic compounds, e.g. cyclopentadienyls
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
- C07D471/14—Ortho-condensed systems
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/12—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains three hetero rings
- C07D491/14—Ortho-condensed systems
- C07D491/147—Ortho-condensed systems the condensed system containing one ring with oxygen as ring hetero atom and two rings with nitrogen as ring hetero atom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
- B01J2523/80—Constitutive chemical elements of heterogeneous catalysts of Group VIII of the Periodic Table
- B01J2523/82—Metals of the platinum group
- B01J2523/822—Rhodium
Landscapes
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
本发明属于化学合成技术领域,具体涉及一种2‑苯基咪唑环烯酮类化合物的合成方法。该方法以过渡金属配合物为催化剂,以咪唑类化合物、环二酮类化合物、碘苯二乙酸为原料,在有机溶剂中合成2‑苯基咪唑环烯酮类化合物。上述反应条件温和,不需添加额外的添加剂(如碱‑醋酸钠、价格昂贵的银盐‑醋酸银等)即可以高效快速地构建C‑C键,得到2‑苯基咪唑环化衍生物,操作简单,具有高效率和高安全性;并且底物范围广、官能团耐受性好、产量较好、副产物少,符合绿色化学、高原子经济性的理念,非常适于大规模产业化生产。
Description
技术领域
本发明属于化学合成技术领域。更具体地,涉及一种2-苯基咪唑环烯酮类化合物的合成方法。
背景技术
现有技术中,大多数药物含有杂环单元,因此,在药物的制备过程中,杂环化合物的合成对于新药研发起到了至关重要的作用。其中,以苯并咪唑结构单元或其类似物作为中心骨架结构的化合物已被证实,可以治疗如血栓、寄生虫病、心力衰竭、高血压等多种疾病,在药物化学领域得到了广泛的关注。
然而,化学合成中化合物C-H键的键能非常高,碳元素与氢元素的电负性又很接近,因而C-H键的极性很小,这些因素使得C-H键具有惰性,在温和条件下将其选择性催化活化或构建其它含碳化学键存在热力学和动力学的双重挑战,是化学合成研究的一个基本问题,也是制约分子合成和制备获得重大突破的瓶颈问题。因此,目前苯并咪唑或其类似物的制备多利用咪唑中氮原子固有的导向能力,借助过渡金属催化,实现邻位的碳氢烷基化反应,来合成得到;如Yu等(Chan W,Lo S,Zhou Z.Yu W.Rh-Catalyzed IntermolecularCarbenoid Functionalization of Aromatic C-H Bonds byα-Diazomalonates.J.Am.Chem.Soc.,2012,134,13565-13568.)公开了一种利用金属铑催化重氮化合物作为卡宾前体的C-H烷基化方法,但由于重氮化合物在自然界中具有高爆炸性和毒性,极大地限制了其在大规模合成中的应用和发展。
发明内容
本发明要解决的技术问题是克服现有技术缺少条件温和、绿色安全的2-苯基咪唑环烯酮类化合物合成方法缺陷和不足,提供一种条件温和、绿色安全的2-苯基咪唑环烯酮类化合物的合成方法。
本发明上述目的通过以下技术方案实现:
叶立德(Ylide),又称鎓内盐,指由供电子的Lewis结构(类似于配位键)形成的正负电荷处于邻位,且均满足八电子结构的内盐分子,是带正电荷的杂原子使相邻负离子稳定的一类化学物种。目前已被发现的叶立德有氮、硫、磷、卤素等,其中碘叶立德同时具备碘化合物和叶立德双重性质应用广泛。Li等(JiangY,Li P,Zhao J.Iodonium Ylides asCarbene Precursors in Rh(III)-Catalyzed C-H Activation.Org.Lett.2020,22(19):7475-7479.)提供了一种导向基团辅助铑催化C-H活化使用碘叶立德作为卡宾前体高效合成各种杂环化合物的方法,但是该方法先合成碘叶立德,再用底物与碘叶立德经铑催化反应得到目标产物,需要经过两步才能合成目标产物,并且同时还需要加入额外的添加剂(如碱-醋酸钠、价格昂贵的银盐-醋酸银等)。
为了解决上述问题,本发明提供了一种2-苯基咪唑环烯酮类化合物的合成方法,合成路线如下:
其中,R1、R2、R3各自独立地为氢或C1~4烷基;
R4为氢或苯基;
R5为氢、C1~4烷基或苯基;
X为N或C;
Y为氢或与咪唑共用2个碳原子的苯基或取代苯基;
Z为苯基或取代苯基、萘基、呋喃基或吡啶基;
所述取代苯基的取代基为C1~4烷基、卤素、羟基、C1~4烷氧基或卤代C1~4烷氧基、硝基中的一种或多种;
具体包括以下步骤:
将咪唑类化合物、环二酮类化合物、碘苯二乙酸、过渡金属配合物催化剂置于有机溶剂中,密闭条件下50~100℃反应完全,后处理,即得;
其中,所述咪唑类化合物为化合物I或化合物I';所述环二酮类化合物为化合物II、化合物II'或1,3-环戊二酮;所述2-苯基咪唑环烯酮类化合物为化合物III、化合物III'、化合物IV或化合物IV'。
本发明用碘叶立德为卡宾前体,利用咪唑基团的导向作用,通过过渡金属配合物催化合成咪唑稠合多环化合物,具体反应机理如下:首先,环二酮类化合物与碘苯二乙酸反应得到碘叶立德中间体;同时,过渡金属配合物催化剂与咪唑类化合物通过协同金属化-去质子化(concerted metalation-deprotonation,CMD)生成过渡金属环中间体;然后过渡金属环中间体与碘叶立德中间体生成卡宾中间体,再经历迁移插入、还原消除过程得到目标产物,同时催化剂再生。因此,本发明无需事先合成碘叶立德,把两步反应缩短至一步,减少了反应步数,符合“一锅合成法”(one-pot synthesis)的化学反应策略,避免在后处理过程中冗长的分离过程和中间体化合物的纯化过程,从而节省时间与资源和提高收率。
优选地,所述R1、R2、R3各自独立地为氢或甲基,R4为氢或苯基;R5为氢、甲基、异丙基或苯基;X为N或C;Y为氢或与咪唑共用2个碳原子的苯基或卤代苯基;Z为苯基或取代苯基、萘基、呋喃基或吡啶基;所述取代苯基的取代基为甲基、异丙基、卤素、羟基、甲氧基、卤代甲氧基、硝基中的一种或多种。
进一步地,所述过渡金属配合物催化剂为五甲基环戊二烯基过渡金属配合物或二氯双(4-甲基异丙基苯基)过渡金属配合物。
优选地,所述过渡金属配合物催化剂选自为二氯(五甲基环戊二烯基)合铑(III)二聚体、二氯双(4-甲基异丙基苯基)钌(II)、二氯(五甲基环戊二烯基)合铱(III)二聚体、二氯双(4-甲基异丙基苯基)钌(II)中的一种或多种。更优选地,所述过渡金属配合物催化剂为二氯(五甲基环戊二烯基)合铑(III)二聚体[Cp*RhCl2]2。
更进一步地,所述反应的温度为60~100℃;优选地,所述反应的温度为70~100℃;更优选地,所述反应的温度为70~100℃;更优选地,所述反应的温度为80℃。
进一步地,所述反应的时间为6~15h。实际反应时间可以用TLC进行跟踪检测。
更进一步地,所述有机溶剂选自六氟异丙醇、二氯乙烷、乙腈、2,2,2-三氟乙醇中的一种或多种。优选地,所述有机溶剂为六氟异丙醇(HFIP)。
进一步地,所述过渡金属配合物催化剂的添加量为咪唑类化合物摩尔量的1~4%。
更进一步地,所述碘苯二乙酸的添加量为咪唑类化合物摩尔量的100~180%。
进一步地,所述环二酮类化合物的添加量为咪唑类化合物摩尔量的100~180%。
更进一步地,所述后处理为将反应液中的溶剂去除(可加热使溶剂蒸发),所得产物经硅胶纯化和洗脱,即得产物。其中,所述洗脱液由石油醚和乙酸乙酯按照体积比(1~3):1混合得到。
本发明具有以下有益效果:
本发明以过渡金属配合物为催化剂,以咪唑类化合物、环二酮类化合物、碘苯二乙酸为原料,在有机溶剂中合成2-苯基咪唑环烯酮类化合物。该反应条件温和,不需添加额外的添加剂(如碱-醋酸钠、价格昂贵的银盐-醋酸银等)即可以高效快速地构建C-C键,得到2-苯基咪唑环化衍生物,操作简单,具有高效率和高安全性;并且底物范围广、官能团耐受性好、产量较好、副产物少,符合绿色化学、高原子经济性的理念,非常适于大规模产业化生产。
具体实施方式
以下结合具体实施例来进一步说明本发明,但实施例并不对本发明做任何形式的限定。除非特别说明,本发明采用的试剂、方法和设备为本技术领域常规试剂、方法和设备。
除非特别说明,以下实施例所用试剂和材料均为市购。
实施例1一种2-苯基咪唑环烯酮类化合物的合成方法
化合物3的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基苯并咪唑(化合物1)、0.24mmol 1,3-环己二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物3),产率为93%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.28(d,J=8.4Hz,1H),8.77(dd,J=8.0,1.1Hz,1H),7.98(d,J=8.2Hz,2H),7.69(ddd,J=8.5,7.1,1.5Hz,1H),7.63-7.57(m,1H),7.52-7.46(m,1H),7.32(ddd,J=8.3,7.3,1.1Hz,1H),3.64(t,J=6.2Hz,2H),2.84-2.74(m,2H),2.40-2.33(m,2H).
13C NMR(150MHz,CDCl3)δ197.4,148.4,148.1,145.0,131.3,131.1,128.8,127.8,126.7,125.4,124.8,122.6,122.1,120.3,115.2,114.7,38.9,29.2,20.9.
实施例2一种2-苯基咪唑环烯酮类化合物的合成方法
化合物6的合成路线:
具体合成步骤:
S1、将0.2mmol4-(叔丁基)-2-(4-氟苯基)-1H咪唑(化合物4)、0.3mmol2,4-二哌啶酮-1-甲酸叔丁酯(化合物5)和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=1:1)淋洗,得产物(化合物6),产率为48%。
核磁数据如下:
1H NMR(600MHz,DMSO)δ9.01(dd,J=12.7,2.7Hz,1H),8.53(dd,J=8.9,6.2Hz,1H),8.06(s,1H),7.80(s,1H),7.47(td,J=8.5,2.7Hz,1H),3.51(td,J=6.8,3.1Hz,2H),3.30(t,J=6.9Hz,2H),1.38(s,8H).
13C NMR(150MHz,DMSO)δ165.4,162.8,161.2 1556.0,142.0,141.6,129.3(d,J=10.7Hz),125.8(d,J=9.3Hz),119.5,116.1(d,J=24.2Hz),112.1(d,J=
25.6Hz),108.8(d,J=3.7Hz),108.1,37.1,32.6,30.5,25.9.
实施例3一种2-苯基咪唑环烯酮类化合物的合成方法
化合物8的合成路线:
具体合成步骤:
S1、将0.2mmol 2-(1-甲基乙烯基)-1H-咪唑(化合物7)、0.24mmol 1,3-环己二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物8),产率为95%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ7.72(d,J=1.3Hz,1H),7.61(s,1H),7.57(d,J=1.2Hz,1H),3.11(t,J=6.2Hz,3H),2.70–2.67(m,3H),2.60(s,4H),2.36–2.31(m,3H).
13C NMR(150MHz,CDCl3)δ195.9,146.9,142.3,135.0,125.7,120.3,119.4,111.0,37.2,25.9,21.3,17.0.
实施例4一种2-苯基咪唑环烯酮类化合物的合成方法
化合物10的合成路线:
具体合成步骤:
S1、将0.2mmol 2-(1,2-二甲基乙烯基)-1H-咪唑(化合物9)、0.24mmol1,3-环己二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物10),产率为84%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ7.70(d,J=1.1Hz,1H),7.51(d,J=1.0Hz,1H),3.12(t,J=6.3Hz,3H),2.72–2.69(m,3H),2.60(d,J=3.9Hz,8H),2.33–2.28(m,3H).
13C NMR(150MHz,CDCl3)δ198.0,146.5,142.0,134.6,132.5,123.6,119.9,110.3,39.7,27.1,20.9,17.2,13.5.
实施例5一种2-苯基咪唑环烯酮类化合物的合成方法
化合物12的合成路线:
具体合成步骤:
S1、将0.2mmol 4-甲基2-(1-甲基乙烯基)-1H-咪唑(化合物11)、0.24mmol1,3-环己二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物12),产率为91%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ7.58(s,1H),7.31(s,1H),3.06(t,J=6.2Hz,2H),2.68–2.65(m,2H),2.58(s,4H),2.50(s,3H),2.33–2.30(m,3H).
13C NMR(150MHz,CDCl3)δ196.0,146.4,144.8,141.7,124.6,120.5,119.0,108.0,37.2,25.9,21.3,17.1,14.6.
实施例6一种2-苯基咪唑环烯酮类化合物的合成方法
化合物14的合成路线:
具体合成步骤:
S1、将0.2mmol 4,5-二甲基2-(1-甲基乙烯基)-1H-咪唑(化合物13)、0.24mmol 1,3-环己二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物14),产率为99%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ7.50(s,1H),3.57(t,J=6.1Hz,3H),2.74(s,4H),2.63–2.60(m,3H),2.53(s,4H),2.40(s,4H),2.22(dt,J=12.8,6.3Hz,3H).
13C NMR(150MHz,CDCl3)δ196.2,146.3,144.3,141.9,125.0,120.0,120.0,119.2,37.0,26.8,22.1,17.2,13.7,13.5.
实施例7一种2-苯基咪唑环烯酮类化合物的合成方法
化合物16的合成路线:
具体合成步骤:
S1、将0.2mmol 2-(1-甲基乙烯基)-1H-咪唑(化合物7)、0.24mmol 4-苯基-1,3-环己二酮(化合物15)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物16),产率为80%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ7.74(d,J=1.3Hz,1H),7.67(s,1H),7.56(d,J=1.2Hz,1H),7.42(t,J=7.6Hz,2H),7.34(dd,J=11.5,6.7Hz,4H),3.66(ddd,J=16.7,11.4,4.9Hz,1H),3.39(dd,J=17.2,4.9Hz,1H),3.28(dd,J=17.2,11.2Hz,1H),3.01–2.91(m,3H),2.64(s,3H).
13C NMR(150MHz,CDCl3)δ195.2,147.0,142.1,141.4,135.0,129.3,127.8,126.9,126.0,120.4,111.1,44.1,39.6,34.0,17.0.
实施例8一种2-苯基咪唑环烯酮类化合物的合成方法
化合物18的合成路线:
具体合成步骤:
S1、将0.2mmol 2-(1-甲基乙烯基)-1H-咪唑(化合物7)、0.24mmol 1,3-环戊二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物18),产率为70%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ7.77(s,1H),7.62(s,1H),7.30(s,1H),3.27–3.24(m,2H),2.87(dd,J=6.4,4.1Hz,2H),2.63(s,3H).
13C NMR(150MHz,CDCl3)δ201.5,154.2,147.7,135.1,127.1,123.7,117.6,110.6,35.2,23.9,17.4.
实施例9一种2-苯基咪唑环烯酮类化合物的合成方法
化合物20的合成路线:
具体合成步骤参考实施例1,得产物(化合物20),产率为58%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.09(s,1H),8.66(d,J=8.1Hz,1H),7.98–7.95(m,2H),7.49(t,J=7.6Hz,1H),7.43(d,J=8.1Hz,1H),7.31(t,J=7.4Hz,1H),3.64(t,J=6.2Hz,2H),2.80–2.76(m,2H),2.54(s,3H),2.39–2.34(m,2H).
13C NMR(150MHz,CDCl3)δ197.5,148.4,148.4,145.1,141.6,131.3,129.3,128.9,126.5,125.3,124.8,122.3,120.2,119.8,115.1,114.7,39.0,29.3,22.4,21.0.HRMS(ESI)calcd C20H17N2O+for[M+H]+:301.1335;Found:301.1342.
实施例10一种2-苯基咪唑环烯酮类化合物的合成方法
化合物22的合成路线:
具体合成步骤参考实施例1,得产物(化合物22),产率为64%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.43(d,J=1.7Hz,1H),8.73(d,J=8.5Hz,1H),8.03(d,J=8.4Hz,1H),7.97(d,J=8.0Hz,1H),7.73(dd,J=8.5,1.8Hz,1H),7.51(t,J=7.7Hz,1H),7.36–7.33(m,1H),3.70(t,J=6.2Hz,2H),2.83–2.80(m,2H),2.41–2.36(m,2H),1.46(s,9H).
13C NMR(150MHz,CDCl3)δ197.8,154.7,148.4,148.3,144.9,131.3,128.9,126.0,125.5,124.6,123.2,122.4,120.1,119.7,115.2,115.1,39.0,35.6,31.4,29.4,21.0.
实施例11一种2-苯基咪唑环烯酮类化合物的合成方法
化合物24的合成路线:
具体合成步骤参考实施例1,得产物(化合物24),产率为90%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.05(d,J=12.3Hz,1H),8.71–8.67(m,1H),7.97–7.93(m,2H),7.51(t,J=7.7Hz,1H),7.33(t,J=7.8Hz,1H),7.26(dd,J=8.6,7.8Hz,1H),3.62(t,J=5.5Hz,2H),2.80–2.76(m,2H),2.37(dt,J=11.4,5.8Hz,2H).
13C NMR(150MHz,CDCl3)δ197.1,164.4(d,J=249.3Hz),149.6,147.6,144.9,131.2,130.7(d,J=11.2Hz),127.2(d,J=9.5Hz),125.6,122.7,120.2,118.5,116.4(d,J=23.9Hz),115.2,113.8(d,J=3.6Hz),112.7(d,J=26.2Hz),38.7,29.2,20.8.
实施例12一种2-苯基咪唑环烯酮类化合物的合成方法
化合物26的合成路线:
具体合成步骤参考实施例1,得产物(化合物26),产率为61%。
核磁数据如下:
1H NMR(600MHz,TFA)δ9.73(s,1H),8.81(d,J=8.5Hz,1H),8.63(d,J=8.5Hz,1H),8.20(d,J=7.9Hz,1H),8.14–8.05(m,2H),7.99(t,J=7.7Hz,1H),4.21(s,2H),3.28(s,2H),2.75(s,2H).
13C NMR(150MHz,TFA)δ202.7,150.8,144.5,143.7,131.8,131.5,131.4,130.1,129.1,127.4,127.3,125.4,118.2,117.1,114.4,113.4,37.7,29.1,19.7.
实施例13一种2-苯基咪唑环烯酮类化合物的合成方法
化合物28的合成路线:
具体合成步骤参考实施例1,得产物(化合物28),产率为84%。
核磁数据如下:
1H NMR(600MHz,TFA)δ9.89(s,1H),8.71(d,J=8.7Hz,1H),8.63(d,J=8.7Hz,1H),8.26(d,J=8.7Hz,1H),8.19(d,J=8.2Hz,1H),8.07(t,J=7.8Hz,1H),7.98(t,J=8.0Hz,1H),4.21(t,J=6.0Hz,2H),3.29–3.25(m,2H),2.77–2.72(m,2H).
13C NMR(150MHz,TFA)δ202.6,150.7,143.8,134.3,132.8,131.6,131.4,130.6,130.1,129.1,127.3,125.1,118.0,117.1,114.4,113.7,37.7,29.1,19.7.
实施例14一种2-苯基咪唑环烯酮类化合物的合成方法
化合物30的合成路线:
具体合成步骤参考实施例1,得产物(化合物30),产率为94%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ10.29(s,1H),8.76(d,J=2.4Hz,1H),8.55(d,J=8.7Hz,1H),8.27(d,J=8.4Hz,1H),7.87(d,J=7.5Hz,1H),7.51(t,J=7.6Hz,1H),7.40–7.35(m,1H),7.14(dd,J=8.7,2.4Hz,1H),3.77(t,J=6.1Hz,2H),2.74–2.69(m,2H),2.29–2.24(m,3H).13C NMR(150MHz,CDCl3)δ198.2,160.6,151.4,148.3,145.3,131.7,131.2,127.0,125.5,122.3,119.6,117.7,116.77,114.57,113.4,111.2,39.0,29.3,20.8.
实施例15一种2-苯基咪唑环烯酮类化合物的合成方法
化合物32的合成路线:
具体合成步骤参考实施例1,得产物(化合物32),产率为52%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ8.82(d,J=2.3Hz,1H),8.61(d,J=8.8Hz,1H),7.91–7.87(m,2H),7.45(t,J=7.6Hz,1H),7.24(d,J=6.3Hz,1H),7.15(dd,J=8.8,2.3Hz,1H),3.92(s,3H),3.57(t,J=6.1Hz,2H),2.78–2.73(m,2H),2.37–2.30(m,2H).
13C NMR(150MHz,CDCl3)δ197.7,162.0,149.2,148.3,145.1,131.2,130.8,126.5,125.4,122.0,119.9,117.5,115.7,115.1,114.1,108.2,55.5,39.0,29.3,20.9.HRMS(ESI)calcd for C20H17N2O+[M+H]+:317.1285;Found:317.1291.
实施例16一种2-苯基咪唑环烯酮类化合物的合成方法
化合物34的合成路线:
具体合成步骤参考实施例1,得产物(化合物34),产率为76%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.31(s,1H),8.77(d,J=8.8Hz,1H),8.02(d,J=8.4Hz,1H),7.97(d,J=8.1Hz,1H),7.55(t,J=7.6Hz,1H),7.45(d,J=7.9Hz,1H),7.39(t,J=7.8Hz,1H),3.70(t,J=6.2Hz,2H),2.84–2.79(m,2H),2.44–2.37(m,2H).
13C NMR(150MHz,CDCl3)δ197.1,151.3(d,J=1.4Hz),149.8,147.3,144.6,131.1,130.3,126.8,125.9,123.2,120.8,120.5(d,J=258.5Hz),120.3,120.2,118.4,115.3,113.9,38.7,29.3,20.8.
实施例17一种2-苯基咪唑环烯酮类化合物的合成方法
化合物36的合成路线:
具体合成步骤参考实施例1,得产物(化合物36),产率为85%。
核磁数据如下:
1H NMR(600MHz,TFA)δ10.65(s,1H),9.16(d,J=9.0Hz,1H),8.92(d,J=8.9Hz,1H),8.71(d,J=8.8Hz,1H),8.30(d,J=8.2Hz,1H),8.16(t,J=7.8Hz,1H),8.07(t,J=8.0Hz,1H),4.28(t,J=5.6Hz,2H),3.36–3.29(m,2H),2.84–2.76(m,2H).
13C NMR(150MHz,TFA)δ202.1,151.8,151.5,142.7,131.6,131.4,130.7,129.3,128.1,126.4,124.1,123.7,119.1,118.7,115.0,114.9,37.7,29.2,19.7.
实施例18一种2-苯基咪唑环烯酮类化合物的合成方法
化合物38的合成路线:
具体合成步骤参考实施例1,得产物(化合物38),产率为99%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.15(d,J=8.6Hz,1H),8.50(s,1H),7.99(d,J=8.4Hz,1H),7.95(d,J=8.1Hz,1H),7.50(dd,J=12.1,8.2Hz,2H),7.34(t,J=7.8Hz,1H),3.63(t,J=6.1Hz,2H),2.80–2.75(m,2H),2.48(s,3H),2.39–2.33(m,2H).
13C NMR(150MHz,CDCl3)δ197.6,148.1,147.5,144.4,138.3,132.8,131.2,126.6,126.5,125.5,124.4,122.6,121.7,120.0,115.2,114.9,38.8,29.2,21.2,20.9.实施例19一种2-苯基咪唑环烯酮类化合物的合成方法
化合物40的合成路线:
具体合成步骤参考实施例1,得产物(化合物40),产率为65%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.14(d,J=8.4Hz,1H),8.00(d,J=8.3Hz,2H),7.54(t,J=7.8Hz,1H),7.50(t,J=7.6Hz,1H),7.40(d,J=7.2Hz,1H),7.34(t,J=7.8Hz,1H),3.62(t,J=6.0Hz,2H),3.17(s,3H),2.79–2.77(m,2H),2.37–2.29(m,2H).
13C NMR(150MHz,CDCl3)δ197.4,148.4,148.2,145.1,138.4,130.7,130.4,130.0,129.8,124.9,124.1,122.5,121.2,120.8,115.1,115.1,39.1,29.5,25.5,21.0.
实施例20一种2-苯基咪唑环烯酮类化合物的合成方法
化合物42的合成路线:
具体合成步骤参考实施例1,得产物(化合物42),产率为76%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.68(s,1H),9.10(s,1H),7.96–7.88(m,2H),7.79(d,J=8.3Hz,1H),7.53–7.42(m,3H),7.27(t,J=7.4Hz,1H),3.48(t,J=6.0Hz,2H),2.78–2.74(m,2H),2.33(dt,J=12.8,6.2Hz,2H).
13C NMR(150MHz,CDCl3)δ197.5,148.3,148.2,144.4,134.4,131.6,131.5,129.1,128.2,127.3,126.8,126.5,125.2,125.0,124.5,123.0,120.1,119.9,114.9,114.6,38.8,29.2,20.8.
实施例21一种2-苯基咪唑环烯酮类化合物的合成方法
化合物44的合成路线:
具体合成步骤参考实施例1,得产物(化合物44),产率为91%。
核磁数据如下:
1H NMR(600MHz,TFA)δ9.63(dd,J=7.6,1.5Hz,1H),8.69(d,J=8.8Hz,1H),8.34(d,J=8.2Hz,1H),8.23(d,J=7.7Hz,1H),8.11(t,J=7.8Hz,1H),8.04(t,J=7.9Hz,1H),4.23(t,J=5.6Hz,2H),3.32–3.27(m,2H),2.77–2.72(m,2H).
13C NMR(150MHz,TFA)δ202.4,150.1,141.9,135.7,133.3,132.6,131.5,130.7,130.2,128.3,127.8,126.6,119.5,117.1,37.9,29.5,19.8.
实施例22一种2-苯基咪唑环烯酮类化合物的合成方法
化合物46的合成路线:
具体合成步骤参考实施例1,得产物(化合物44),产率为68%。
核磁数据如下:
1H NMR(600MHz,TFA)δ11.44(s,1H),9.69(d,J=5.1Hz,1H),9.37(d,J=5.3Hz,1H),8.80(d,J=8.7Hz,1H),8.43(d,J=8.3Hz,1H),8.27(t,J=7.7Hz,1H),8.20(t,J=7.8Hz,1H),4.34(s,2H),3.31(s,2H),2.82(s,2H).
13C NMR(150MHz,TFA)δ200.0,155.6,145.7,139.5,137.8,132.7,132.0,129.97,129.93,127.0,126.8,123.3,117.5,116.0,115.0,37.1,29.5,19.5.
实施例23一种2-苯基咪唑环烯酮类化合物的合成方法
化合物48的合成路线:
具体合成步骤参考实施例1,得产物(化合物48),产率为65%。
核磁数据如下:
1H NMR(600MHz,TFA)δ9.65(d,J=8.5Hz,1H),8.84(d,J=8.0Hz,1H),8.79(s,1H),8.36(t,J=7.8Hz,1H),8.32(s,1H),8.18(t,J=7.5Hz,1H),4.13(d,J=4.5Hz,2H),3.31–3.26(m,2H),2.76(d,J=5.4Hz,2H).
13C NMR(150MHz,TFA)δ202.8,148.8,145.3,136.9,135.8,132.5,131.1,130.9,130.5,127.9,127.8,124.3,119.6,118.6,115.5,115.0,37.8,28.8,19.7.
实施例24一种2-苯基咪唑环烯酮类化合物的合成方法
化合物50的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基咪唑(化合物49)、0.24mmol 1,3-环己二酮(化合物2)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物50),产率为94%。
1H NMR(600MHz,CDCl3)δ9.31(d,J=8.1Hz,1H),8.62(dd,J=7.9,1.2Hz,1H),7.70–7.61(m,4H),3.22(t,J=6.3Hz,2H),2.82–2.79(m,2H),2.38(dt,J=12.9,6.4Hz,2H).
13C NMR(150MHz,CDCl3)δ197.9,143.99,143.9,132.4,130.0,128.3,127.1,126.8,123.2,122.1,116.2,112.2,39.4,27.2,20.6.
实施例25一种2-苯基咪唑环烯酮类化合物的合成方法
化合物52的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基苯并咪唑(化合物1)、0.24mmol 4-异丙基-1,3-环己二酮(化合物51)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物52),产率为91%。
1H NMR(600MHz,CDCl3)δ9.29(d,J=8.4Hz,1H),8.77(dd,J=8.0,1.0Hz,1H),7.97(dd,J=20.2,8.2Hz,2H),7.71–7.67(m,1H),7.60(t,J=7.5Hz,1H),7.51(t,J=7.6Hz,1H),7.35(t,J=7.8Hz,1H),3.74(dd,J=16.3,5.2Hz,1H),3.23(dd,J=16.9,11.0Hz,1H),2.83(ddd,J=15.2,3.4,1.3Hz,1H),2.56–2.49(m,1H),2.21–2.13(m,1H),1.87(dd,J=13.5,6.7Hz,1H),1.13(dd,J=18.2,6.8Hz,6H).
13C NMR(150MHz,CDCl3)δ198.1,148.5,148.4,145.2,131.5,131.2,128.8,128.0,126.7,125.5,125.0,122.7,122.2,120.6,115.2,114.4,43.0,39.5,33.4,32.4,20.0,19.7.
实施例26一种2-苯基咪唑环烯酮类化合物的合成方法
化合物54的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基苯并咪唑(化合物1)、0.24mmol 4,4--二甲基-1,3-环己二酮(化合物53)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物54),产率为84%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.35(d,J=8.4Hz,1H),8.83(d,J=7.9Hz,1H),8.07(d,J=8.4Hz,1H),8.01(d,J=8.1Hz,1H),7.74(t,J=7.7Hz,1H),7.65(t,J=7.5Hz,1H),7.55(t,J=7.6Hz,1H),7.40(t,J=7.8Hz,1H),3.56(s,2H),2.70(s,2H),1.29(s,6H).
13C NMR(150MHz,CDCl3)δ197.9,148.6,146.9,145.0,131.5,131.4,128.8,128.1,126.8,125.7,125.0,122.8,122.1,120.5,115.6,114.0,52.7,43.1,32.5,28.7.
实施例27一种2-苯基咪唑环烯酮类化合物的合成方法
化合物55的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基苯并咪唑(化合物1)、0.24mmol 4-苯基-1,3-环己二酮(化合物15)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物55),产率为86%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.33(d,J=8.4Hz,1H),8.79(d,J=7.8Hz,1H),7.98(d,J=8.0Hz,1H),7.85(d,J=8.4Hz,1H),7.71(t,J=8.3Hz,1H),7.62(t,J=7.5Hz,1H),7.48(dd,J=13.3,7.5Hz,3H),7.44–7.37(m,3H),7.29–7.25(m,2H),3.99(d,J=12.7Hz,1H),3.67–3.59(m,2H),3.11–2.99(m,2H).
13C NMR(150MHz,CDCl3)δ196.8,148.3,147.8,145.1,142.1,131.3,131.3,129.4,128.8,128.2,127.8,127.0,126.8,125.6,125.0,122.8,122.3,120.5,115.3,114.5,45.6,39.1,37.2.
实施例28一种2-苯基咪唑环烯酮类化合物的合成方法
化合物56的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基苯并咪唑(化合物1)、0.24mmol 1,3-环戊二酮(化合物15)、0.3mmol碘苯二乙酸PhI(OAc)2和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=3:1)淋洗,得产物(化合物56),产率为94%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ8.82(d,J=7.9Hz,1H),8.64(d,J=7.7Hz,1H),7.95(d,J=8.1Hz,1H),7.79(d,J=8.2Hz,1H),7.67–7.64(m,1H),7.59(t,J=7.2Hz,1H),7.50(t,J=7.4Hz,1H),7.35(t,J=7.4Hz,1H),3.52–3.49(m,2H),2.87–2.84(m,2H).
13C NMR(150MHz,CDCl3)δ201.3,158.1,148.4,144.5,137.5,131.1,130.2,130.2,128.4,127.5,127.1,125.6,125.0,123.7,123.3,121.6,120.3,117.7,112.6,35.1,25.1.
实施例29一种2-苯基咪唑环烯酮类化合物的合成方法
化合物57的合成路线:
具体合成步骤:
S1、将0.2mmol 2-苯基苯并咪唑(化合物1)、0.3mmol 2,4-二哌啶酮-1-甲酸叔丁酯(化合物5)和0.005mmol二氯(五甲基环戊二烯基)合铑(III)二聚体加入到耐压密封反应管中,加入1.5mL六氟异丙醇(HFIP)注射到耐压密封反应管中,于80℃下搅拌反应12h,反应过程中用TLC跟踪判断反应时间;
S2、反应结束后将步骤S1所得反应物料从耐压密封反应管中取出,蒸去有机溶剂,经硅胶纯化和洗脱剂(石油醚:乙酸乙酯=1:1)淋洗,得产物(化合物57),产率为63%。
核磁数据如下:
1H NMR(600MHz,DMSO)δ9.18(d,J=8.3Hz,1H),8.73(dd,J=8.0,1.0Hz,1H),8.23(d,J=8.4Hz,1H),8.08(s,1H),7.95(d,J=7.9Hz,1H),7.76(ddd,J=8.4,7.1,1.5Hz,1H),7.71–7.66(m,1H),7.57–7.52(m,1H),7.46–7.40(m,1H),3.78(t,J=6.7Hz,2H),3.56(td,J=6.7,3.3Hz,2H).
13C NMR(150MHz,DMSO)δ165.3,147.7,144.8,143.4,131.4,130.7,129.8,127.8,127.1,125.4,124.8,122.6,122.4,120.0,116.0,109.8,37.4,27.5.
实施例30一种2-苯基咪唑环烯酮类化合物的合成方法
化合物58的合成路线:
具体合成步骤参考实施例24,得产物(化合物58),产率为98%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.35–9.32(m,1H),8.68(dd,J=7.9,1.4Hz,1H),7.70(d,J=1.3Hz,1H),7.65(dtd,J=16.2,7.1,1.4Hz,2H),7.61(d,J=1.4Hz,1H),3.06(s,2H),2.67(s,2H),1.26(s,6H).
13C NMR(150MHz,CDCl3)δ198.2,144.4,142.7,133.4,129.7,128.1),126.9,126.7,123.3,122.8,115.0,112.1,53.4,41.2,32.5,28.7.
实施例31一种2-苯基咪唑环烯酮类化合物的合成方法
化合物59的合成路线:
具体合成步骤参考实施例23,得产物(化合物59),产率为56%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.38–9.34(m,1H),8.68(dd,J=7.8,1.4Hz,1H),7.70–7.63(m,3H),7.57(d,J=1.4Hz,1H),7.43(t,J=7.5Hz,2H),7.36(dd,J=16.6,7.7Hz,3H),3.73–3.66(m,1H),3.49–3.43(m,1H),3.31(dd,J=17.3,11.3Hz,1H),3.08–3.02(m,2H).
13C NMR(150MHz,CDCl3)δ197.3,144.2,143.6,142.0,133.6,129.8,129.3128.3,127.8,127.0,126.9,126.8,123.4,122.8,115.6,112.2,46.2,38.9,35.3.
实施例32一种2-苯基咪唑环烯酮类化合物的合成方法
化合物60的合成路线:
具体合成步骤参考实施例23,得产物(化合物60),产率为92%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ8.89–8.86(m,1H),8.63–8.59(m,1H),7.71(d,J=1.3Hz,1H),7.68–7.64(m,2H),7.59(d,J=1.4Hz,1H),3.25–3.22(m,2H),2.92–2.89(m,2H).
13C NMR(150MHz,CDCl3)δ202.2,156.1,145.0,133.7),129.7,128.7,125.5,124.0,123.7,122.5,119.4,111.6,35.4,23.7.
实施例33一种2-苯基咪唑环烯酮类化合物的合成方法
化合物61的合成路线:
具体合成步骤参考实施例23,得产物(化合物61),产率为49%。
核磁数据如下:
1H NMR(600MHz,CDCl3)δ9.24–9.18(m,1H),8.55–8.49(m,1H),8.11(d,J=1.0Hz,1H),8.06(s,1H),7.67(d,J=1.0Hz,1H),7.65–7.62(m,2H),3.53(td,J=6.8,3.2Hz,2H),3.31(t,J=6.8Hz,2H).
13C NMR(150MHz,CDCl3)δ165.3,142.9,140.1,132.9,128.7,127.8,127.6,127.2,123.0,122.9,114.4,110.4,37.2,25.9.
实施例34一种2-苯基咪唑环烯酮类化合物的合成方法
与实施例1不同之处在于,本实施例用二氯双(4-甲基异丙基苯基)钌(II)[RuCl2(p-cymene](2.5mol%)替换掉催化剂二氯(五甲基环戊二烯基)合铑(III)二聚体[Cp*RhCl2]2,其余参数及操作参考实施例1。
制备得到化合物3,产率66%。
实施例35一种2-苯基咪唑环烯酮类化合物的合成方法
与实施例1不同之处在于,本实施例用二氯(五甲基环戊二烯基)合铱(III)二聚体[Cp*IrCl2]2(2.5mol%)替换掉[Cp*RhCl2]2,其余参数及操作参考实施例1。
制备得到化合物3,产率50%。
实施例36一种2-苯基咪唑环烯酮类化合物的合成方法
与实施例1不同之处在于,本实施例用2,2,2-三氟乙醇TFE替换掉六氟异丙醇(HFIP),其余参数及操作参考实施例1。
制备得到化合物3,产率52%。
实施例37一种2-苯基咪唑环烯酮类化合物的合成方法
与实施例1不同之处在于,本实施例将反应温度设定为60℃,其余参数及操作参考实施例1。
制备得到化合物3,产率60%。
实施例38一种2-苯基咪唑环烯酮类化合物的合成方法
与实施例1不同之处在于,本实施例反应时间为6h,其余参数及操作参考实施例1。
制备得到化合物3,产率50%。
对比例1
与实施例1不同之处在于,本对比例用1,4-二氧六环(1,4-dioxane)替换掉六氟异丙醇(HFIP),其余参数及操作参考实施例1。
无法制备得到化合物3。
对比例2
与实施例1不同之处在于,本对比例将反应温度设为室温,其余参数及操作参考实施例1。
制备得到化合物3,产率32%。
对比例3
与实施例1不同之处在于,本对比例不添加催化剂二氯(五甲基环戊二烯基)合铑(III)二聚体[Cp*RhCl2]2,其余参数及操作参考实施例1。
无法制备得到化合物3。
对比例4
与实施例1不同之处在于,本对比例不添加碘苯二乙酸PhI(OAc)2,添加摩尔百分比为150%的醋酸铜或碳酸银,其余参数及操作参考实施例1。
无法制备得到化合物3。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (7)
1.一种2-苯基咪唑环烯酮类化合物的合成方法,其特征在于,合成路线如下:
其中,R1、R2、R3各自独立地为氢或C1~4烷基;
R4为氢或苯基;
R5为氢、C1~4烷基或苯基;
X为N或C;
Y为氢或与咪唑共用2个碳原子的苯基或取代苯基;
Z为苯基或取代苯基、萘基、呋喃基或吡啶基;
所述取代苯基的取代基为C1~4烷基、卤素、羟基、C1~4烷氧基或卤代C1~4烷氧基、硝基中的一种或多种;
具体包括以下步骤:
将咪唑类化合物、环二酮类化合物、碘苯二乙酸、过渡金属配合物催化剂置于有机溶剂中,密闭条件下50~100℃反应完全,后处理,即得;
其中,所述咪唑类化合物为化合物I或化合物I';所述环二酮类化合物为化合物II、化合物II'或1,3-环戊二酮;所述2-苯基咪唑环烯酮类化合物为化合物III、化合物III'、化合物IV或化合物IV';
所述过渡金属配合物催化剂选自二氯(五甲基环戊二烯基)合铑(III)二聚体、二氯双(4-甲基异丙基苯基)钌(II)、二氯(五甲基环戊二烯基)合铱(III)二聚体、二氯双(4-甲基异丙基苯基)钌(II)中的一种或多种;
所述有机溶剂选自六氟异丙醇、二氯乙烷、乙腈、2,2,2-三氟乙醇中的一种或多种。
2.根据权利要求1所述合成方法,其特征在于,所述R1、R2、R3各自独立地为氢或甲基,R4为氢或苯基;R5为氢、甲基、异丙基或苯基;X为N或C;Y为氢或与咪唑共用2个碳原子的苯基或卤代苯基;Z为苯基或取代苯基、萘基、呋喃基或吡啶基;所述取代苯基的取代基为甲基、异丙基、卤素、羟基、甲氧基、卤代甲氧基、硝基中的一种或多种。
3.根据权利要求1或2所述合成方法,其特征在于,所述反应的温度为60~100℃。
4.根据权利要求1或2所述合成方法,其特征在于,所述反应的时间为6~15 h。
5.根据权利要求1或2所述合成方法,其特征在于,所述过渡金属配合物催化剂的添加量为咪唑类化合物摩尔量的1~4%。
6.根据权利要求1所述合成方法,其特征在于,所述碘苯二乙酸的添加量为咪唑类化合物摩尔量的100~180%。
7.根据权利要求1所述合成方法,其特征在于,所述环二酮类化合物的添加量为咪唑类化合物摩尔量的100~180%。
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