CN113548968A - Method for synthesizing (Z) -olefin by nickel-catalyzed iron-mediated alkyne fluoroalkyl and product - Google Patents
Method for synthesizing (Z) -olefin by nickel-catalyzed iron-mediated alkyne fluoroalkyl and product Download PDFInfo
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- CN113548968A CN113548968A CN202110827235.8A CN202110827235A CN113548968A CN 113548968 A CN113548968 A CN 113548968A CN 202110827235 A CN202110827235 A CN 202110827235A CN 113548968 A CN113548968 A CN 113548968A
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- Prior art keywords
- nickel
- iron
- mediated
- fluoroalkylation
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 30
- 230000001404 mediated effect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 8
- 150000001345 alkine derivatives Chemical class 0.000 claims abstract description 34
- 239000000047 product Substances 0.000 claims abstract description 28
- -1 fluoroalkyl halide Chemical class 0.000 claims abstract description 19
- 239000003446 ligand Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 13
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000011541 reaction mixture Substances 0.000 claims abstract description 6
- 239000005051 trimethylchlorosilane Substances 0.000 claims abstract description 6
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims abstract description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical class [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000003213 activating effect Effects 0.000 claims abstract description 3
- 238000004440 column chromatography Methods 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 3
- 238000010791 quenching Methods 0.000 claims abstract description 3
- 230000000171 quenching effect Effects 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims abstract description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 24
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 claims description 11
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 10
- RYXZOQOZERSHHQ-UHFFFAOYSA-N [2-(2-diphenylphosphanylphenoxy)phenyl]-diphenylphosphane Chemical compound C=1C=CC=C(P(C=2C=CC=CC=2)C=2C=CC=CC=2)C=1OC1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RYXZOQOZERSHHQ-UHFFFAOYSA-N 0.000 claims description 9
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- UEXCJVNBTNXOEH-UHFFFAOYSA-N Ethynylbenzene Chemical group C#CC1=CC=CC=C1 UEXCJVNBTNXOEH-UHFFFAOYSA-N 0.000 claims description 6
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 6
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 6
- 239000000460 chlorine Substances 0.000 claims description 5
- 150000004820 halides Chemical class 0.000 claims description 5
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 claims description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 4
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 4
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 4
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 claims description 4
- LCSNDSFWVKMJCT-UHFFFAOYSA-N dicyclohexyl-(2-phenylphenyl)phosphane Chemical group C1CCCCC1P(C=1C(=CC=CC=1)C=1C=CC=CC=1)C1CCCCC1 LCSNDSFWVKMJCT-UHFFFAOYSA-N 0.000 claims description 4
- HPFGZHCWLVSVKJ-UHFFFAOYSA-N dicyclohexyl-[2-(2-dicyclohexylphosphanylphenoxy)phenyl]phosphane Chemical compound C1CCCCC1P(C=1C(=CC=CC=1)OC=1C(=CC=CC=1)P(C1CCCCC1)C1CCCCC1)C1CCCCC1 HPFGZHCWLVSVKJ-UHFFFAOYSA-N 0.000 claims description 4
- CNXMDTWQWLGCPE-UHFFFAOYSA-N ditert-butyl-(2-phenylphenyl)phosphane Chemical group CC(C)(C)P(C(C)(C)C)C1=CC=CC=C1C1=CC=CC=C1 CNXMDTWQWLGCPE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical group 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- LFZJRTMTKGYJRS-UHFFFAOYSA-N 1-chloro-4-ethynylbenzene Chemical group ClC1=CC=C(C#C)C=C1 LFZJRTMTKGYJRS-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910021585 Nickel(II) bromide Inorganic materials 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- IPLJNQFXJUCRNH-UHFFFAOYSA-L nickel(2+);dibromide Chemical compound [Ni+2].[Br-].[Br-] IPLJNQFXJUCRNH-UHFFFAOYSA-L 0.000 claims description 3
- UXPOJVLZTPGWFX-UHFFFAOYSA-N pentafluoroethyl iodide Chemical compound FC(F)(F)C(F)(F)I UXPOJVLZTPGWFX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- UDWBMXSQHOHKOI-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10-henicosafluoro-10-iododecane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)I UDWBMXSQHOHKOI-UHFFFAOYSA-N 0.000 claims description 2
- KWXGJTSJUKTDQU-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8-heptadecafluoro-8-iodooctane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)I KWXGJTSJUKTDQU-UHFFFAOYSA-N 0.000 claims description 2
- BULLJMKUVKYZDJ-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluoro-6-iodohexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)I BULLJMKUVKYZDJ-UHFFFAOYSA-N 0.000 claims description 2
- PGRFXXCKHGIFSV-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4-nonafluoro-4-iodobutane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)I PGRFXXCKHGIFSV-UHFFFAOYSA-N 0.000 claims description 2
- WHFPFLKZXFBCSO-UHFFFAOYSA-N 1-(4-ethynylphenyl)ethanone Chemical group CC(=O)C1=CC=C(C#C)C=C1 WHFPFLKZXFBCSO-UHFFFAOYSA-N 0.000 claims description 2
- VPQQZKWYZYVTMU-UHFFFAOYSA-N 1-bromo-1,1,2,2,3,3,4,4,5,5,6,6,7,7,7-pentadecafluoroheptane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)Br VPQQZKWYZYVTMU-UHFFFAOYSA-N 0.000 claims description 2
- LTLVZQZDXQWLHU-UHFFFAOYSA-N 1-bromo-4-ethynylbenzene Chemical group BrC1=CC=C(C#C)C=C1 LTLVZQZDXQWLHU-UHFFFAOYSA-N 0.000 claims description 2
- OOZKONVIIMFOKW-UHFFFAOYSA-N 1-ethynyl-2-(trifluoromethyl)benzene Chemical group FC(F)(F)C1=CC=CC=C1C#C OOZKONVIIMFOKW-UHFFFAOYSA-N 0.000 claims description 2
- ZSYQVVKVKBVHIL-UHFFFAOYSA-N 1-tert-butyl-4-ethynylbenzene Chemical group CC(C)(C)C1=CC=C(C#C)C=C1 ZSYQVVKVKBVHIL-UHFFFAOYSA-N 0.000 claims description 2
- LZSDQLUEGYXDCW-UHFFFAOYSA-N 2-ethynylbenzonitrile Chemical group C#CC1=CC=CC=C1C#N LZSDQLUEGYXDCW-UHFFFAOYSA-N 0.000 claims description 2
- OFXNEEFXYBSZJQ-UHFFFAOYSA-N 3-ethynylbenzonitrile Chemical group C#CC1=CC=CC(C#N)=C1 OFXNEEFXYBSZJQ-UHFFFAOYSA-N 0.000 claims description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910021595 Copper(I) iodide Inorganic materials 0.000 claims description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- QPJVMBTYPHYUOC-UHFFFAOYSA-N Methyl benzoate Natural products COC(=O)C1=CC=CC=C1 QPJVMBTYPHYUOC-UHFFFAOYSA-N 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- BZRRQSJJPUGBAA-UHFFFAOYSA-L cobalt(ii) bromide Chemical compound Br[Co]Br BZRRQSJJPUGBAA-UHFFFAOYSA-L 0.000 claims description 2
- FJDJVBXSSLDNJB-LNTINUHCSA-N cobalt;(z)-4-hydroxypent-3-en-2-one Chemical compound [Co].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O FJDJVBXSSLDNJB-LNTINUHCSA-N 0.000 claims description 2
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 claims description 2
- 125000000623 heterocyclic group Chemical group 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 2
- 229940095102 methyl benzoate Drugs 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 125000005003 perfluorobutyl group Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)* 0.000 claims description 2
- 125000005004 perfluoroethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 claims description 2
- 125000005005 perfluorohexyl group Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)* 0.000 claims description 2
- 125000005007 perfluorooctyl group Chemical group FC(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)* 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 125000000524 functional group Chemical group 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 6
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 18
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 15
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 238000012512 characterization method Methods 0.000 description 6
- 239000012043 crude product Substances 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 4
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 3
- 238000005160 1H NMR spectroscopy Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003480 eluent Substances 0.000 description 3
- IRSJDVYTJUCXRV-UHFFFAOYSA-N ethyl 2-bromo-2,2-difluoroacetate Chemical compound CCOC(=O)C(F)(F)Br IRSJDVYTJUCXRV-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000012074 organic phase Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000010898 silica gel chromatography Methods 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 238000006880 cross-coupling reaction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 1
- AAPJHKVQJRYJPA-UHFFFAOYSA-N acetylene benzonitrile Chemical group C#C.C(#N)C1=CC=CC=C1 AAPJHKVQJRYJPA-UHFFFAOYSA-N 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PSTOFIZBDFZINB-PFONDFGASA-N ethyl (Z)-2,2-difluoro-4-[2-[2-[4-(2-methylpropyl)phenyl]propanoyloxymethyl]phenyl]but-3-enoate Chemical compound CCOC(C(/C=C\C1=C(COC(C(C)C2=CC=C(CC(C)C)C=C2)=O)C=CC=C1)(F)F)=O PSTOFIZBDFZINB-PFONDFGASA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 238000010544 hydroalkylation process reaction Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000707 stereoselective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/62—Halogen-containing esters
- C07C69/65—Halogen-containing esters of unsaturated acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/49—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C255/50—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton to carbon atoms of non-condensed six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/49—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C255/57—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing cyano groups and carboxyl groups, other than cyano groups, bound to the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
- C07C67/347—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by addition to unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
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Abstract
The invention discloses a method for synthesizing (Z) -olefin by nickel-catalyzed iron-mediated alkyne fluoroalkylation and a product thereof, wherein the method comprises the steps of sequentially adding a metal promoter and an ultra-dry solvent, and sequentially activating metals by using 1, 2-dibromoethane and trimethylchlorosilane; cooling, then sequentially adding alkyne, fluoroalkyl halide, catalyst, ligand and additive, and violently stirring the reaction mixture in a nitrogen atmosphere; quenching by using a saturated ammonium chloride solution, washing, extracting and drying a reaction product, and separating by column chromatography to obtain a target product. The invention uses cheap and easily obtained iron powder as a reaction accelerator to synthesize the (Z) -fluoroalkyl olefin, thereby expanding the substrate preparation range of the compound; the preparation method provided by the invention is mild in condition, can be compatible with various functional groups, and also shows good applicability in functional group modification of some complex molecules.
Description
Technical Field
The invention belongs to the technical field of organic compound synthesis, and particularly relates to a method for synthesizing (Z) -olefin by nickel-catalyzed iron-mediated alkyne fluoroalkyl and a product.
Background
In recent decades, it has been generally recognized that the introduction of fluorine atoms or fluorine-containing functional groups into organic molecules results in a significant enhancement of the lipophilicity, metabolic stability and bioavailability of the parent molecule, which makes it potentially useful in medicine, agrochemicals and material science. Since olefins are commonly used as raw materials in chemical synthesis, it is important to develop a synthetic method of fluoroalkylated olefins.
The hydro-hydroalkylation reaction of alkyne has the disadvantages that the used catalyst (Pt, Ir) is relatively expensive, has no wide economic practicability, the E/Z selectivity is unstable, or a special substrate is required, and the like. Iron (0) is one of the most abundant and inexpensive metals on earth compared to other metals (e.g., lithium, magnesium, aluminum, zinc, manganese, tin), but its use in organic synthesis has not been widely exploited.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
The invention provides a novel method for coupling alkyne and bromodifluoroacetic acid ethyl ester or perfluoroalkyl halide under the catalysis of nickel and mediation of iron with high efficiency. The reaction produces highly stereoselective (Z) -fluoroalkylated olefins in moderate to good yields and excellent Z/E selectivity (up to >99: 1Z/E). In addition, the present invention allows for facile functionalization of alkyne complex molecules of carbohydrates, drugs and biologically active compounds.
The chemical equation for this reaction is shown below:
in order to solve the technical problems, the invention provides the following technical scheme: a process for synthesizing (Z) -olefin by iron-mediated fluoro-alkylation of alkyne in the presence of Ni catalyst includes,
sequentially adding a metal promoter and an ultra-dry solvent, and sequentially activating metals by using 1, 2-dibromoethane and trimethylchlorosilane; cooling, then sequentially adding alkyne, fluoroalkyl halide, catalyst, ligand and additive, and violently stirring the reaction mixture in a nitrogen atmosphere;
quenching by using a saturated ammonium chloride solution, washing, extracting and drying a reaction product, and separating by column chromatography to obtain a target product.
As a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the alkyne comprises phenylacetylene, 4-chlorphenyl acetylene, 4-bromophenyl acetylene, 2-trifluoromethyl phenylacetylene, 4-acetylene methyl benzoate, 2-cyano phenylacetylene, 3-cyano phenylacetylene, 4-acetyl phenylacetylene, 4-aldehyde phenylacetylene and one of 4-tert-butyl phenylacetylene;
the fluoroalkylated halide includes one of 2-bromo-2, 2-difluoro-3-acetic acid ethyl ester, 2-bromo-N, N-diethyl-2, 2-difluoro-3-acetamide, 2-bromo-2, 2-difluoro-3-acetylpiperidine, 2-bromo-2, 2-difluoro-3-acetylmorpholine, perfluoroiodoethane, perfluoroiodobutane, perfluoroiodohexane, perfluorobromoheptane, perfluoroiodooctane, and perfluoroiododecane.
As a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the additive comprises lithium iodide;
the catalyst comprises one of ferric chloride, ferric trichloride, cobalt bromide, cobalt acetylacetonate, cuprous iodide, nickel chloride and nickel bromide;
the ligand comprises one of bis (2-diphenylphosphinophenyl) ether, bis (dicyclohexylphosphinophenyl) ether, 4, 5-bis (dicyclohexylphosphine) -dibenzopyran derivative, 2-dicyclohexylphosphine-2 ',6' -dimethoxybiphenyl, 2- (di-tert-butylphosphino) biphenyl, 2-dicyclohexylphosphine-2, 4, 6-triisopropylbiphenyl and 2- (dicyclohexylphosphino) biphenyl.
As a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the catalyst is nickel chloride; the ligand is bis (2-diphenylphosphinophenyl) ether.
As a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the solvent comprises one of acetonitrile, N-dimethylacetamide, toluene, N-dimethylformamide, dimethyl sulfoxide, 1,4-dioxane and 1, 2-dichloroethane;
the metal promoter comprises one of indium, chromium, manganese, zinc, magnesium and iron.
As a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the solvent is N, N-dimethylformamide; the metal promoter is iron.
As a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the molar ratio of alkyne to fluoroalkylated halide is 1: 3.
as a preferred embodiment of the nickel-catalyzed iron-mediated process for the fluoroalkylation of alkynes to (Z) -alkenes according to the invention, wherein: the vigorous stirring is carried out at the temperature of 60-100 ℃ for 24 hours.
It is another object of the present invention to provide a product obtained by the method for synthesizing (Z) -alkene by nickel-catalyzed iron-mediated fluoroalkylation of alkyne, wherein the product is a (Z) -fluoroalkylated alkene compound, and the chemical structural formula of the product is as follows:
wherein R comprises one of phenyl, halogen substituted phenyl, 2-trifluoromethyl substituted phenyl, 4-benzoate, 2-cyano substituted phenyl, 3-cyano substituted phenyl, 4-acetyl substituted phenyl, 4-aldehyde substituted phenyl and 4-tert-butyl substituted phenyl;
r' comprises one of 2, 2-difluoro-3-acetic acid carbethoxy, N-diethyl-2, 2-difluoro-3-acetamido, 2-difluoro-3-acetyl heterocycle, perfluoroethyl, perfluorobutyl, perfluorohexyl, perfluoroheptyl, perfluorooctyl and perfluorodecyl.
As a preferred embodiment of the product of the present invention, wherein: the halogen comprises chlorine or bromine; the heterocyclic ring includes piperidine or morpholine.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for realizing cross coupling reaction of alkyne and bromodifluoroacetic acid ethyl ester or perfluoroalkyl halide in N, N-dimethylformamide by using nickel chloride as a catalyst, bis (2-diphenylphosphinophenyl) ether as a ligand, iron as a metal promoter and lithium iodide as an additive; the invention uses cheap and easily obtained iron powder as a reaction accelerator to synthesize the (Z) -fluoroalkyl olefin, thereby expanding the substrate preparation range of the compound; the preparation method provided by the invention is mild in condition, can be compatible with various functional groups, and also shows good applicability in functional group modification of some complex molecules.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a hydrogen spectrum of a target product (Z) -ethyl 4- (4-chlorophenyl) -2, 2-difluorobutyl-3-enoate of example 1 according to the present invention;
FIG. 2 is a carbon spectrum of a target product (Z) -ethyl 4- (4-chlorophenyl) -2, 2-difluorobutyl-3-enoate according to example 1 of the present invention;
FIG. 3 is a hydrogen spectrum of (Z) -4- (2-perfluoroethylvinyl) benzonitrile, which is the target product of example 2 according to the present invention;
FIG. 4 is a carbon spectrum of (Z) -4- (2-perfluoroethylvinyl) benzonitrile, which is the target product of example 2 according to the present invention;
FIG. 5 is a hydrogen spectrum of ethyl (Z) -2, 2-difluoro-4- (2- (((2- (4-isobutylphenyl) propionyl) oxy) methyl) phenyl) but-3-enoate, the target product of example 3 of the present invention;
FIG. 6 is a carbon spectrum of ethyl (Z) -2, 2-difluoro-4- (2- (((2- (4-isobutylphenyl) propionyl) oxy) methyl) phenyl) but-3-enoate, which is the target product of example 3 of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
(1) To a 10mL Schlenk flask were added iron powder (168.0mg,3.0mmol,3.0equiv.) and DMF (2mL) in that order. 1, 2-dibromoethane (28mg,0.15mmol) was added, and the reaction flask was heated to 320 ℃ for 35 seconds and then cooled to room temperature. Trimethylchlorosilane (22mg,0.15mmol) was then added, heated using an electric heat gun at 320 ℃ for 35 seconds, and cooled again to room temperature to complete activation of the iron powder.
(2) After cooling to room temperature, NiCl is added into the reaction flask in sequence2(13mg,0.1mmol,0.1equiv.), LiI (267.7mg,2.0mmol,2.0equiv.), DPEPhos (108mg,0.2mmol,0.2equiv.), ethyl 2-bromo-2, 2-difluoro-3-acetate (3.0mmol,3.0equiv.), and 4-chlorophenylacetylene (1.0mmol,1.0 equiv.). The reaction mixture was stirred at 60 ℃ for 24h and then saturated NH4The Cl solution was quenched and extracted with ethyl acetate (20 mL. times.3). The combined organic phases were washed with saturated brine (20mL), dried over anhydrous sodium sulfate, and concentrated in vacuo to give the crude product. The crude product was purified by silica gel column chromatography (using ethyl acetate/petroleum ether as eluent) to finally obtain 224.2mg of the desired product ethyl (Z) -4- (4-chlorophenyl) -2, 2-difluorobutyl-3-enoate, which has the formula:
characterization of the above ethyl (Z) -4- (4-chlorophenyl) -2, 2-difluorobutyl-3-enoate, as shown in FIGS. 1 and 2, resulted in: a colorless liquid;1H NMR(400MHz,CDCl3):δ7.34-7.28(m,4H),6.88(dd,J=12.6,2.1Hz,1H),5.88(q,J=13.3Hz,1H),4.12(q,J=7.1Hz,2H),1.19(t,J=7.2Hz,3H)ppm.13C NMR(100MHz,CDCl3):δ163.3(t,J=33.8Hz),137.4(t,J=8.4Hz),134.7,132.6-132.5(m),130.3(t,J=3.0Hz),128.4,122.3(t,J=27.6Hz),112.1(t,J=245.6Hz),63.1,13.6ppm.IR(KBr):ν=3411,2985,1768,1493,1153,1094,844cm-1.HRMS(m/z):calcd for C12H12ClF2O2[M+H]+261.0488,found:261.0494.
according to the characterization data, the obtained reaction product is (Z) -4- (4-chlorphenyl) -2, 2-difluorobutyl-3-ethyl enoate (purity is more than 98%); the product yield was calculated to be 86%.
Example 2
(1) To a 10mL Schlenk flask were added iron powder (168.0mg,3.0mmol,3.0equiv.) and DMF (2mL) in that order. 1, 2-dibromoethane (28mg,0.15mmol) was added, and the reaction flask was heated to 320 ℃ for 35 seconds and then cooled to room temperature. Trimethylchlorosilane (22mg,0.15mmol) was then added, heated using an electric heat gun at 320 ℃ for 35 seconds, and cooled again to room temperature to complete activation of the iron powder.
(2) After cooling to room temperature, NiCl is added into the reaction flask in sequence2(13mg,0.1mmol,0.1equiv.), LiI (267.7mg,2.0mmol,2.0equiv.), DPEPhos (108mg,0.2mmol,0.2equiv.), perfluoroiodoethane (3.0mmol,3.0equiv.), and 4-cyanobenzene acetylene (1.0mmol,1.0 equiv.). The reaction mixture was stirred at 100 ℃ for 24h and then saturated NH4The Cl solution was quenched and extracted with ethyl acetate (20 mL. times.3). The combined organic phases were washed with saturated brine (20mL), dried over anhydrous sodium sulfate, and concentrated in vacuo to give the crude product. The crude product was purified by silica gel column chromatography (using ethyl acetate/petroleum ether as eluent) to finally obtain 168.0mg of the objective product (Z) -4- (2-perfluoroethylvinyl) benzonitrile, which has the structural formula:
characterization of the above (Z) -4- (2-perfluoroethylvinyl) benzonitrile, as shown in FIGS. 3 and 4, resulted in: a colorless liquid;1H NMR(400MHz,CDCl3):δ7.66(d,J=8.4Hz,2H),7.44(d,J=8.1Hz,2H),7.15(dt,J=12.8,2.9Hz,1H),5.87(td,J=14.9,12.6Hz,1H)ppm.13C NMR(100MHz,CDCl3):δ140.1(t,J=5.0Hz),138.5,131.9,129.1(t,J=3.6Hz),118.4(t,J=22.1Hz),118.4,112.4ppm.IR(KBr):ν=3413,2232,1339,1204,1109,880,582cm-1.HRMS(m/z):calcd for C11H7F5N[M+H]+248.0493,found:248.0499.
according to the characterization data, the obtained reaction product is (Z) -4- (2-perfluoroethylvinyl) benzonitrile (purity is more than 98%); the product yield was calculated to be 68%.
Example 3
(1) To a 10mL Schlenk flask were added iron powder (168.0mg,3.0mmol,3.0equiv.) and DMF (2mL) in that order. 1, 2-dibromoethane (28mg,0.15mmol) was added, and the reaction flask was heated to 320 ℃ for 35 seconds and then cooled to room temperature. Trimethylchlorosilane (22mg,0.15mmol) was then added, heated using an electric heat gun at 320 ℃ for 35 seconds, and cooled again to room temperature to complete activation of the iron powder.
(2) After cooling to room temperature, NiCl is added into the reaction flask in sequence2(13mg,0.1mmol,0.1equiv.), LiI (267.7mg,2.0mmol,2.0equiv.), DPEPhos (108mg,0.2mmol,0.2equiv.), ethyl 2-bromo-2, 2-difluoro-3-acetate (3.0mmol,3.0equiv.), and 2-ethynyl benzyl 2- (4-isobutylphenyl) propionate (1.0mmol,1.0 equiv.). The reaction mixture was stirred at 60 ℃ for 24h and then saturated NH4The Cl solution was quenched and extracted with ethyl acetate (20 mL. times.3). The combined organic phases were washed with saturated brine (20mL), dried over anhydrous sodium sulfate, and concentrated in vacuo to give the crude product. The crude product was purified by silica gel column chromatography (using ethyl acetate/petroleum ether as eluent) to give 270.8mg of the desired product (Z) -2, 2-difluoro-4- (2- (((2- (4-isobutylphenyl) propionyl) oxy) methyl) phenyl) but-3-enoic acid ethyl ester 3 having the formula:
characterization of the above ethyl (Z) -2, 2-difluoro-4- (2- (((2- (4-isobutylphenyl) propionyl) oxy) methyl) phenyl) but-3-enoate, as shown in figures 5 and 6, gave: a colorless liquid;1H NMR(400MHz,CDCl3):δ7.20–7.08(m,6H),7.03–6.99(m,2H),6.75(dt,J=12.1,1.6Hz,1H),5.76(q,J=12.0Hz,1H),4.96(d,J=2.1Hz,2H),3.82(q,J=7.2Hz,2H),3.66(q,J=7.2Hz,1H),2.38(d,J=7.2Hz,2H),1.82–1.72(m,1H),1.42(d,J=7.1Hz,3H),1.04(t,J=7.2Hz,3H),0.83(d,J=6.6Hz,6H)ppm.13C NMR(100MHz,CDCl3):δ174.3,163.2(t,J=33.5Hz),140.7,137.5,136.5(t,J=9.2Hz),133.9(t,J=1.1Hz),133.4(t,J=1.2Hz),129.3,128.6,128.4,128.0,127.2,123.8(t,J=27.5Hz),112.0(t,J=246.3Hz),64.5,62.9,45.0,45.0,30.2,22.4,22.3,18.2,13.6ppm.IR(KBr):ν=2957,1771,1738,1455,1318,1156,1073cm-1.HRMS(m/z):calcd for C26H31F2O4[M+H]+445.2185,found:445.2190.
according to the characterization data, the reaction product obtained was (Z) -ethyl 2, 2-difluoro-4- (2- (((2- (4-isobutylphenyl) propionyl) oxy) methyl) phenyl) but-3-enoate (purity > 98%); the product yield was calculated to be 61%.
Example 4
Example 4 is essentially the same as example 1, except that in step (1), the catalyst is different and the ligand is 2-dicyclohexylphosphine-2 ',6' -dimethoxybiphenyl (SPhos), as shown in Table 2 below:
TABLE 2
As can be seen from Table 2, the reaction yield was very low without any catalyst, and the desired product was obtained only in a 12% yield. Subsequently, when a metal salt such as Fe (II or III), Co (II), or Cu (I or II) is added to the reaction system, it was found that NiCl is used2When used as a catalyst, the desired product was obtained in 77% yield. However, other Ni catalysts [ Ni (acac) ]2Or NiBr2]The yield was not improved.
Example 5
Example 5 is essentially the same as example 1, except that in step (1), the solvent is different and the ligand is 2-dicyclohexylphosphine-2 ',6' -dimethoxybiphenyl (SPhos), as shown in Table 3 below:
TABLE 3
Solvent(s) | Ligands | Yield (%) |
MeCN | SPhos | <5 |
DMA | SPhos | 72 |
Toluene | SPhos | <5 |
DMF | SPhos | 77 |
DMSO | SPhos | 46 |
1,4-dioxane | SPhos | 21 |
DCE | SPhos | 15 |
As can be seen from table 3, in the difluoroalkylation of alkynes, solvents were used, such as: the yields of MeCN, Toluene, DMSO, 1,4-dioxane, DCE and other solvents are lower; the yield can reach 72% when DMA is used as the solvent, and is optimal when DMF is used as the solvent, and the yield is 77%.
Example 6
Example 6 is essentially the same as example 1, except that in step (1), the ligands are different, as shown in table 4 below:
TABLE 4
Ligands | Yield (%) (Z/E) |
Ligand-free | 61(72:28) |
Bis (2-diphenylphosphinophenyl) ether | 86(95:5) |
Bis (dicyclohexylphosphinophenyl) ether | 53(88:12) |
4, 5-bis (dicyclohexylphosphine) -dibenzopyran derivatives | 66(94:6) |
2-dicyclohexylphosphine-2 ',6' -dimethoxybiphenyl | 59(88:12) |
2- (di-tert-butylphosphino) biphenyl | 48(93:7) |
2-dicyclohexylphosphonium-2, 4, 6-triisopropylbiphenyl | 62(70:30) |
2- (dicyclohexylphosphino) biphenyl | 59(88:12) |
As can be seen from table 4, in the difluoroalkylation reaction of alkynes, different phosphine ligands showed different catalytic activities in both reaction yield and stereoselectivity. Using ligands such as: bis (2-diphenylphosphinophenyl) ether, bis (dicyclohexylphosphinophenyl) ether, 4, 5-bis (dicyclohexylphosphine) -dibenzopyran derivative, 2-dicyclohexylphosphine-2 ',6' -dimethoxybiphenyl, 2- (di-t-butylphosphino) biphenyl, 2-dicyclohexylphosphine-2, 4, 6-triisopropylbiphenyl and 2- (dicyclohexylphosphino) biphenyl, it was found that the effect was most excellent when bis (2-diphenylphosphinophenyl) ether was used as a ligand, and the target product was obtained in a yield of 86% (95: 5Z/E).
Example 7
Example 7 is essentially the same as example 1, except that in step (1), the metal promoter is different, as shown in table 5 below:
TABLE 5
As can be seen from table 5, in the difluoroalkylation of alkynes, metal promoters were used, such as: in, Cr, Mn, Zn, Mg, Fe, all of which can be obtained In moderate to good yields, with Fe being the most preferred.
Example 8
Example 8 is essentially the same as example 1, except that in step (1), the alkyne and fluoroalkylated halide are different, as shown in table 6 below:
TABLE 6
The invention provides a method for realizing cross coupling reaction of alkyne and bromodifluoroacetic acid ethyl ester or perfluoroalkyl halide in N, N-dimethylformamide by using nickel chloride as a catalyst, bis (2-diphenylphosphinophenyl) ether as a ligand, iron as a metal promoter and lithium iodide as an additive; the invention uses cheap and easily obtained iron powder as a reaction accelerator to synthesize the (Z) -fluoroalkyl olefin, thereby expanding the substrate preparation range of the compound; the preparation method provided by the invention is mild in condition, can be compatible with various functional groups, and also shows good applicability in functional group modification of some complex molecules.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for synthesizing (Z) -olefin by iron-mediated alkyne fluoroalkyl catalysis through nickel, which is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
sequentially adding a metal promoter and an ultra-dry solvent, and sequentially activating metals by using 1, 2-dibromoethane and trimethylchlorosilane; cooling, then sequentially adding alkyne, fluoroalkyl halide, catalyst, ligand and additive, and violently stirring the reaction mixture in a nitrogen atmosphere;
quenching by using a saturated ammonium chloride solution, washing, extracting and drying a reaction product, and separating by column chromatography to obtain a target product.
2. The nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of claim 1, wherein: the alkyne comprises phenylacetylene, 4-chlorphenyl acetylene, 4-bromophenyl acetylene, 2-trifluoromethyl phenylacetylene, 4-acetylene methyl benzoate, 2-cyano phenylacetylene, 3-cyano phenylacetylene, 4-acetyl phenylacetylene, 4-aldehyde phenylacetylene and one of 4-tert-butyl phenylacetylene;
the fluoroalkylated halide includes one of 2-bromo-2, 2-difluoro-3-acetic acid ethyl ester, 2-bromo-N, N-diethyl-2, 2-difluoro-3-acetamide, 2-bromo-2, 2-difluoro-3-acetylpiperidine, 2-bromo-2, 2-difluoro-3-acetylmorpholine, perfluoroiodoethane, perfluoroiodobutane, perfluoroiodohexane, perfluorobromoheptane, perfluoroiodooctane, and perfluoroiododecane.
3. The nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of claim 1 or 2, wherein: the additive comprises lithium iodide;
the catalyst comprises one of ferric chloride, ferric trichloride, cobalt bromide, cobalt acetylacetonate, cuprous iodide, nickel chloride and nickel bromide;
the ligand comprises one of bis (2-diphenylphosphinophenyl) ether, bis (dicyclohexylphosphinophenyl) ether, 4, 5-bis (dicyclohexylphosphine) -dibenzopyran derivative, 2-dicyclohexylphosphine-2 ',6' -dimethoxybiphenyl, 2- (di-tert-butylphosphino) biphenyl, 2-dicyclohexylphosphine-2, 4, 6-triisopropylbiphenyl and 2- (dicyclohexylphosphino) biphenyl.
4. The nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of claim 3, wherein: the catalyst is nickel chloride; the ligand is bis (2-diphenylphosphinophenyl) ether.
5. The nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of any of claims 1,2 or 4, wherein: the solvent comprises one of acetonitrile, N-dimethylacetamide, toluene, N-dimethylformamide, dimethyl sulfoxide, 1,4-dioxane and 1, 2-dichloroethane;
the metal promoter comprises one of indium, chromium, manganese, zinc, magnesium and iron.
6. The nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of claim 5, wherein: the solvent is N, N-dimethylformamide; the metal promoter is iron.
7. The nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of any of claims 1,2, 4 or 6, wherein: the molar ratio of alkyne to fluoroalkylated halide is 1: 3.
8. the nickel-catalyzed iron-mediated fluoroalkylation of alkynes to (Z) -alkenes of claim 7, wherein: the vigorous stirring is carried out at the temperature of 60-100 ℃ for 24 hours.
9. A product obtained by the method for synthesizing (Z) -olefin by nickel-catalyzed iron-mediated alkyne fluoroalkylation according to any one of claims 1 to 8, wherein the method comprises the following steps: the product is a (Z) -fluoroalkylated olefin compound having the chemical formula:
wherein R comprises one of phenyl, halogen substituted phenyl, 2-trifluoromethyl substituted phenyl, 4-benzoate, 2-cyano substituted phenyl, 3-cyano substituted phenyl, 4-acetyl substituted phenyl, 4-aldehyde substituted phenyl and 4-tert-butyl substituted phenyl;
r' comprises one of 2, 2-difluoro-3-acetic acid carbethoxy, N-diethyl-2, 2-difluoro-3-acetamido, 2-difluoro-3-acetyl heterocycle, perfluoroethyl, perfluorobutyl, perfluorohexyl, perfluoroheptyl, perfluorooctyl and perfluorodecyl.
10. The product of claim 9, wherein: the halogen comprises chlorine or bromine; the heterocyclic ring includes piperidine or morpholine.
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