CN113549101A - 艾日布林及其中间体的制备方法 - Google Patents
艾日布林及其中间体的制备方法 Download PDFInfo
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- CN113549101A CN113549101A CN202010338097.2A CN202010338097A CN113549101A CN 113549101 A CN113549101 A CN 113549101A CN 202010338097 A CN202010338097 A CN 202010338097A CN 113549101 A CN113549101 A CN 113549101A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 229960003649 eribulin Drugs 0.000 title claims abstract description 18
- UFNVPOGXISZXJD-XJPMSQCNSA-N eribulin Chemical compound C([C@H]1CC[C@@H]2O[C@@H]3[C@H]4O[C@H]5C[C@](O[C@H]4[C@H]2O1)(O[C@@H]53)CC[C@@H]1O[C@H](C(C1)=C)CC1)C(=O)C[C@@H]2[C@@H](OC)[C@@H](C[C@H](O)CN)O[C@H]2C[C@@H]2C(=C)[C@H](C)C[C@H]1O2 UFNVPOGXISZXJD-XJPMSQCNSA-N 0.000 title claims abstract 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 113
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims description 25
- 229910052736 halogen Inorganic materials 0.000 claims description 11
- 150000002367 halogens Chemical class 0.000 claims description 11
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 229910021554 Chromium(II) chloride Inorganic materials 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- HDXVWQGJUHXLQA-UHFFFAOYSA-N 1-(diethoxyphosphorylmethylsulfonyl)naphthalene Chemical compound C1(=CC=CC2=CC=CC=C12)S(=O)(=O)CP(OCC)(OCC)=O HDXVWQGJUHXLQA-UHFFFAOYSA-N 0.000 claims description 4
- 229910021585 Nickel(II) bromide Inorganic materials 0.000 claims description 4
- 239000002585 base Substances 0.000 claims description 4
- 239000005051 trimethylchlorosilane Substances 0.000 claims description 4
- 101100331289 Aquifex aeolicus (strain VF5) der gene Proteins 0.000 claims description 3
- 238000006646 Dess-Martin oxidation reaction Methods 0.000 claims description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 2
- 238000007239 Wittig reaction Methods 0.000 claims description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000002009 diols Chemical group 0.000 claims description 2
- 238000006266 etherification reaction Methods 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 230000011987 methylation Effects 0.000 claims description 2
- 238000007069 methylation reaction Methods 0.000 claims description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000012634 fragment Substances 0.000 abstract description 40
- -1 diethyl naphthylsulfonyl methyl Chemical group 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 239000011651 chromium Substances 0.000 abstract description 3
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 34
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 26
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 24
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 20
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 18
- UFNVPOGXISZXJD-JBQZKEIOSA-N eribulin Chemical compound C([C@H]1CC[C@@H]2O[C@@H]3[C@H]4O[C@@H]5C[C@](O[C@H]4[C@H]2O1)(O[C@@H]53)CC[C@@H]1O[C@H](C(C1)=C)CC1)C(=O)C[C@@H]2[C@@H](OC)[C@@H](C[C@H](O)CN)O[C@H]2C[C@@H]2C(=C)[C@H](C)C[C@H]1O2 UFNVPOGXISZXJD-JBQZKEIOSA-N 0.000 description 18
- 239000010410 layer Substances 0.000 description 16
- 238000003756 stirring Methods 0.000 description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 14
- 239000012044 organic layer Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 12
- 239000000047 product Substances 0.000 description 12
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 11
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 10
- 238000004440 column chromatography Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000741 silica gel Substances 0.000 description 8
- 229910002027 silica gel Inorganic materials 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 7
- 239000011541 reaction mixture Substances 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- 239000012267 brine Substances 0.000 description 6
- 239000003814 drug Substances 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- 239000012074 organic phase Substances 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- 125000006239 protecting group Chemical group 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- WRIKHQLVHPKCJU-UHFFFAOYSA-N sodium bis(trimethylsilyl)amide Chemical compound C[Si](C)(C)N([Na])[Si](C)(C)C WRIKHQLVHPKCJU-UHFFFAOYSA-N 0.000 description 3
- 229910000104 sodium hydride Inorganic materials 0.000 description 3
- 150000003457 sulfones Chemical class 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 206010055113 Breast cancer metastatic Diseases 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229960000439 eribulin mesylate Drugs 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 2
- AVTYONGGKAJVTE-OLXYHTOASA-L potassium L-tartrate Chemical compound [K+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O AVTYONGGKAJVTE-OLXYHTOASA-L 0.000 description 2
- 239000001472 potassium tartrate Substances 0.000 description 2
- 229940111695 potassium tartrate Drugs 0.000 description 2
- 235000011005 potassium tartrates Nutrition 0.000 description 2
- UAWABSHMGXMCRK-UHFFFAOYSA-L samarium(ii) iodide Chemical compound I[Sm]I UAWABSHMGXMCRK-UHFFFAOYSA-L 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000012312 sodium hydride Substances 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- UUCHLIAGHZJJER-UHFFFAOYSA-N 1,2-diethylnaphthalene Chemical compound C1=CC=CC2=C(CC)C(CC)=CC=C21 UUCHLIAGHZJJER-UHFFFAOYSA-N 0.000 description 1
- LBFOEWHXHLPENT-UHFFFAOYSA-N 1-(diethoxyphosphorylmethylsulfonyl)-4-methylbenzene Chemical compound CCOP(=O)(OCC)CS(=O)(=O)C1=CC=C(C)C=C1 LBFOEWHXHLPENT-UHFFFAOYSA-N 0.000 description 1
- HEWZVZIVELJPQZ-UHFFFAOYSA-N 2,2-dimethoxypropane Chemical compound COC(C)(C)OC HEWZVZIVELJPQZ-UHFFFAOYSA-N 0.000 description 1
- YQTCQNIPQMJNTI-UHFFFAOYSA-N 2,2-dimethylpropan-1-one Chemical group CC(C)(C)[C]=O YQTCQNIPQMJNTI-UHFFFAOYSA-N 0.000 description 1
- FKXCNOSKBLGEMQ-UHFFFAOYSA-N 2-bromoethenyl(trimethyl)silane Chemical group C[Si](C)(C)C=CBr FKXCNOSKBLGEMQ-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 206010006187 Breast cancer Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- YKFRUJSEPGHZFJ-UHFFFAOYSA-N N-trimethylsilylimidazole Chemical compound C[Si](C)(C)N1C=CN=C1 YKFRUJSEPGHZFJ-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229940122530 Tubulin polymerization inhibitor Drugs 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000002246 antineoplastic agent Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- SIPUZPBQZHNSDW-UHFFFAOYSA-N bis(2-methylpropyl)aluminum Chemical compound CC(C)C[Al]CC(C)C SIPUZPBQZHNSDW-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229940044683 chemotherapy drug Drugs 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- XBWRJSSJWDOUSJ-UHFFFAOYSA-L chromium(ii) chloride Chemical compound Cl[Cr]Cl XBWRJSSJWDOUSJ-UHFFFAOYSA-L 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 238000006264 debenzylation reaction Methods 0.000 description 1
- NKLCNNUWBJBICK-UHFFFAOYSA-N dess–martin periodinane Chemical compound C1=CC=C2I(OC(=O)C)(OC(C)=O)(OC(C)=O)OC(=O)C2=C1 NKLCNNUWBJBICK-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229940118951 halaven Drugs 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000011981 lindlar catalyst Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- YACKEPLHDIMKIO-UHFFFAOYSA-N methylphosphonic acid Chemical compound CP(O)(O)=O YACKEPLHDIMKIO-UHFFFAOYSA-N 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000005146 naphthylsulfonyl group Chemical group C1(=CC=CC2=CC=CC=C12)S(=O)(=O)* 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- IPLJNQFXJUCRNH-UHFFFAOYSA-L nickel(2+);dibromide Chemical compound [Ni+2].[Br-].[Br-] IPLJNQFXJUCRNH-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- IUBQJLUDMLPAGT-UHFFFAOYSA-N potassium bis(trimethylsilyl)amide Chemical compound C[Si](C)(C)N([K])[Si](C)(C)C IUBQJLUDMLPAGT-UHFFFAOYSA-N 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- BCNZYOJHNLTNEZ-UHFFFAOYSA-N tert-butyldimethylsilyl chloride Chemical compound CC(C)(C)[Si](C)(C)Cl BCNZYOJHNLTNEZ-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- CSRZQMIRAZTJOY-UHFFFAOYSA-N trimethylsilyl iodide Substances C[Si](C)(C)I CSRZQMIRAZTJOY-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/04—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
- C07D307/18—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/20—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/26—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D307/30—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/32—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D407/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00
- C07D407/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings
- C07D407/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
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Abstract
本发明提供了一种艾日布林及其中间的制备方法;特别是采用以萘砜基甲基膦酸二乙酯合成的艾日布林片段A与片段ERB拼接制备化合物P1,收率显著提高,远高于现有技术,并且立体专一性高;此外,本发明在合成中间体化合物P1时,采用了改进的NHK反应,大大降低了铬试剂的用量,不仅降低了成本,而且减少了对环境的污染。
Description
技术领域
本发明属于医药技术领域,具体涉及一种艾日布林及其中间的体制备方法。
背景技术
甲磺酸艾日布林由日本卫材制药公司开发,注射液于2010年11月获得美国FDA批准上市,商品名 HALAVEN。作为具有全新作用机制的微管蛋白聚合抑制剂,甲磺酸艾日布林是第1个用于转移性乳腺癌 患者获得总生存期改善的单药化疗药,为局部晚期乳腺癌或转移性乳腺癌患者提高生存率和生活质量提供 了新的治疗手段,是一个极具应用价值的药物。其化学结构为:
从艾日布林的结构看,分子中含有19个手性中心,合成非常困难,通常是通过如下三个片段A (C27-C35)、B(C14-C26)和C(C1-C13)拼接而成:片段A先与片段B拼接,然后再与片段C拼接。 在各片段拼接时,因离去基团的不同而有不同的路线。
中国专利CN1216051C公开了35位碳以MPM(甲氧基苯硫基甲基)保护的片段A与片段B拼接, 再与片段C拼接。
上述方法中,片段A和B拼接后,得到C27非对映体混合物,比例约为3:1,混合物通过多次分离纯 化,以片段B计,A与B拼接反应的收率仅33.6%。MPM基团离去后与片段C拼接,而MPM的基团离 去需要多次转化,步骤繁琐,收率低。
中国专利CN104876896A公开了35位碳以苯磺酰基保护的片段A与片段B拼接,再与片段C拼接。
上述方法中,片段A和B拼接时,需要加入手性配体,以片段B计,拼接反应的收率59.2%,然后再 与片段C拼接,制备艾日布林的总收率仍然较低,并且纯化方法繁琐,需要柱层析。
该反应具有原料价格低且利于后续环合反应的特点,但是该专利的产率为45.8%,并且需要柱层析, 仍然不能满足工业化生产需求。
我们在生产和研发中发现,艾日布林片段A和B拼接的产物稳定性不高,在柱层析时能够明显看到硅 胶柱由浅黄色慢慢变成黑褐色,提示了拼接产物在硅胶柱的酸性环境下发生了分解,导致A和B整体的拼 接反应产率下降,这也是现有技术片段A和B拼接反应产率不高的原因之一,并且原料药工业化生产中一 般投料量非常大,色谱柱纯化过程耗时时间较长,使得拼接产物更加容易分解。
鉴于此,本发明所要解决的技术问题在于提供一种无需色谱柱纯化,收率高、立体选择性强且适于 工业化大量生产的艾日布林的制备方法。
发明内容
为解决上述片段A和片段B拼接反应柱层析容易分解导致产率不高的技术问题,本发明提供了一种制 备艾日布林的新的中间体片段A,以及该中间体片段A的制备方法;本发明还提供了由该片段A制备艾日 布林的方法。
一方面,本发明提供了化合物P1,具有如下结构:
其中,R1为H,C1~6的烷基或卤素,优选R1为H,甲基,乙基,或Cl,R2为Cl或OMs。
另一方面,本发明提供了一种化合物P1的制备方法,包括:使化合物ERA与化合物ERB通过NHK 反应,转化成化合物P1:
其中,R1为H,C1~6的烷基或卤素,R2为Cl或OMs。
上述方法中,优选向反应体系中加入NiX2,CrCl2,铝屑和三甲基氯硅烷,其中,NiX2为NiBr2或NiCl2。 更优选的,所述反应,以化合物ERA的投料量为1摩尔当量计,NiBr2的用量为0.02~0.08摩尔当量、CrCl2的用量为0.1~0.3摩尔当量,ERB用量为1.1~2摩尔当量,1-溴-2-三甲基甲硅烷基乙烯用量为2~3摩尔当 量,铝屑用量为2.0~4.0摩尔当量,三甲基氯硅烷用量为2.5~4.5摩尔当量。
另一方面,本发明还提供了化合物ERA的制备方法包括:
(1)将化合物ERA2与萘砜基甲基膦酸二乙酯通过wittig反应,转化成化合物ERA3:
其中,萘砜基甲基膦酸二乙酯的用量为1~2摩尔当量;反应体系中需要加入碱,所述碱优选为NaHMDS、 KHMDS、NaH等,碱的用量为3~5当量;反应温度为0~15℃;
(2)化合物ERA3选择性脱去苄基保护,转化成ERA4:
优选,将化合物ERA3在三甲基硅烷咪唑作用下脱去苄基保护,转化成ERA4;
(3)将化合物ERA4的双键通过选择性还原,转化成化合物ERA5:
优选,上述反应中,以NaBH(OAc)3为还原剂,对化合物ERA4的双键进行选择性还原;
(4)将化合物ERA5酯键经水解反应,转化成ERA6:
(5)将化合物ERA6的邻二醇经缩酮反应,转化成化合物ERA7:
(6)将化合物ERA7通过甲基化反应,转化成化合物ERA8:
(7)将化合物ERA8结构中的缩酮进行水解,转化成化合物ERA9:
(8)将化合物ERA9羟基经TBS保护得到ERA10:
(9)使ERA10的双键经氧化,得到化合物ERA:
其中,R1为H,C1~6的烷基或卤素;优选R1为H。
另一方面,本发明还提供了一种艾日布林中间体P6的制备方法,其特征在于,包括:
(1)使化合物P1在碱的作用下分子内成醚,转化成化合物P2:
(2)使化合物P2通过还原反应,转化成化合物P3:
(3)使化合物P3与化合物ERC在碱的作用下反应,转化成化合物P4
(4)化合物P4经Dess-Martin氧化反应,转化成化合物P5
(5)使化合物P5在脱去萘基磺酰基,转化成化合物P6:
其中,R1为H,C1~6的烷基或卤素。
上述方法中,其中步骤(1)化合物P1在碱的作用下分子内成醚转化成化合物P2;
步骤(2)所述还原反应所用还原剂为DIBALH;
步骤(3)所述碱优选为丁基锂;
步骤(5)优选,使化合物P5在二碘化钐作用下脱去萘基磺酰基,转化成化合物P6。
另一方面,本发明还提供化合物,其具有如下结构:
其中,R1为H,C1~6的烷基或卤素,优选R1为H。
本发明所述的C1~6烷基是指包含1~6个碳原子的直链或支链烷基,或环烷基,包括但不限于甲基,乙 基,丙基,丁基,异丙基,叔丁基,2-甲基丙基,正己基,环己基;所述的卤素是指F,Cl,Br和I。本 发明所提到的“TBS”是指叔丁基二甲基硅烷基,“Pv”是指特戊酰基,“Ms”是指甲磺酰基,“DIBALH” 是指二异丁基氢化铝。
采用以萘砜基甲基膦酸二乙酯合成的片段ERA与片段ERB拼接制备化合物P1,收率显著提高,推测的 机理:1)萘砜基膦酸酯作为保护基的比现有技术的苯基和甲苯基更加富电子,拼接反应过程中和产物的稳 定性更高;(2)萘砜基膦酸酯作为保护基,结合申请人研发的改进的NHKL反应,在铬试剂低用量的情况 下仍能较好反应,减少了催化剂过量带来的副反应,减少杂质的产生。3)产物高稳定性无需柱层析,但仍 含有一定的杂质,导致产率整体偏高。
与现有技术相比,本发明提供了一种制备艾日布林全新的合成方法和中间体,特别是采用以萘砜基甲 基膦酸二乙酯合成的片段ERA与片段ERB拼接制备化合物P1,收率显著提高,例如可以高达81.9%,比现 有技术提高了150%-260%,远高于现有技术,且立体专一性高;并且由于产率较高,无需采用柱层析,仅 通过常规的结晶析出工艺即可获得片段A和B拼接的粗产物直接用于下一步环合成醚反应。
以化合物P1为中间体制备化合物P6,以及以此制备艾日布林,总体反应收率大大提高。此外,本 发明在合成化合物P1时,采用了改进的NHK反应,大大降低了铬试剂的用量,仅为0.2mol%,不仅降低了 成本,而且减少了对环境的污染。整体路线操作简单,收率和纯度高,非常适合工业化生产用于制备原料 药。
具体实施例
以下结合具体实施例对本发明的技术方案以及优选实施方式做进一步解释和说明。
实施例1化合物ERA3a的制备
10℃下,7.6g萘砜基甲基膦酸二乙酯溶于20ml四氢呋喃中,滴加36.04g 25%NaHMDS的四氢呋喃 溶液,控制温度不超过15℃,搅拌30分钟,将溶液加入到溶有7.6g ERA2的38ml四氢呋喃溶液中,控 制温度不超过20℃,搅拌1小时。加入49ml 1N盐酸,控制温度不超过20℃,减压浓缩除去四氢呋喃, 加入30ml二氯甲烷搅拌萃取三次,合并有机相,依次用30ml碳酸氢钠溶液两次、30ml盐水溶液两次 洗涤,干燥过滤,浓缩得到9.4g ERA3a。
实施例2化合物ERA4a和ERA5a的制备
(1)化合物ERA4a的制备:室温下,9.4g ERA3a溶于50ml乙酸乙酯中,加入11.8gTMSI,加热反应 至50℃,搅拌2小时。反应液降至-10℃,用氨水溶液进行淬灭,控制温度低于30℃。搅拌分层。有机相 依次用50ml 10%亚硫酸钠水溶液、50ml 1N盐酸、50ml 5%碳酸氢钠水溶液和50ml盐水洗涤,硫酸 镁干燥,过滤浓缩,得到7.8g ERA4a。
(2)化合物ERA5a的制备:反应瓶中加入7.8g NaBH(OAc)3、80ml乙腈,加热至65℃,加入14g 50%ERA4a的乙腈溶液,反应温度升高至80℃,搅拌3小时。冷却至10℃,滴加25ml水进行淬灭,保持 内温低于20℃。搅拌分层,有机层依次用40ml碳酸氢钠水溶液两次、40ml水洗涤两次。干燥浓缩,得 到7.3g ERA5a。
实施例3化合物ERA6a和ERA7a的制备
(1)化合物ERA6a的制备:将7.3g ERA5a溶于16ml甲醇中,加入1.6g碳酸钾,50℃下搅拌1 小时。冷却反应液至15℃,滴加24ml 1N盐酸,控制内温低于30℃。加入29ml水、23ml甲苯,搅拌 分层,水层用13ml甲苯再次反萃取。水相减压浓缩,除去甲醇,加入2.1g碳酸氢钠、4.4g氯化钠, 用25ml乙酸乙酯分别萃取三次。合并有机相,浓缩,得到ERA15粗品。80℃下,将ERA6粗品溶解于7:1 甲苯/nBuOH中,经热过滤后重结晶,过滤得到4.6g ERA6a。
(2)化合物ERA7a的制备:25℃下,4.6g ERA6a分散于10ml丙酮中,加入5ml 2,2-二甲氧基丙 烷,0.04g浓硫酸,搅拌反应液直至均匀。反应液中加入23ml甲苯,9ml 5%碳酸钾溶液中进行淬灭。 搅拌分层,有机层用10%盐水洗涤,硫酸钠干燥,过滤,减压浓缩得到4.7g ERA7a。
实施例4化合物ERA8a和ERA9a的制备
(1)化合物ERA8a的制备:将0.67g氢化钠(60%)溶解于12ml四氢呋喃,冷却至10℃以下。向 上述氢化钠溶液中滴加4.7g ERA7a溶于12ml四氢呋喃的溶液,保持内温低于15℃。搅拌30分钟,保 持温度低于15℃,加入1.94g碘甲烷。滴加完毕,反应液升至室温,搅拌2小时。反应液中加入23ml 水、33ml甲苯,搅拌分层,有机层用25ml盐水洗涤两次,干燥过滤,减压浓缩,得到4.5g ERA8a。
(2)化合物ERA9a的制备:将4.5g ERA8a溶解于5ml甲醇、5ml 2N盐酸中,室温下搅拌反应。 10℃下,将反应液加入到6.0ml 2M NaOH溶液中,加入10ml水。反应体系中加入23ml乙酸乙酯,搅 拌分层,水层用23ml乙酸乙酯再次萃取,合并有机层,干燥过滤,减压浓缩得到3.9g ERA9a。
实施例5化合物ERA10a和ERAa的制备
(1)化合物ERA10a的制备:3.9g ERA9溶于15ml DMF中,加入3.6g三乙胺,控制内温低于30℃, 加入4.0g TBSCl。室温搅拌反应2小时。反应液中加入40ml正庚烷、15ml水,搅拌分层。有机层依 次用12ml 1M盐酸、12ml水、12ml碳酸氢钠水溶液和12ml盐水洗涤,有机层经干燥过滤,减压浓缩, 得到5.7g ERA10a。
(2)化合物ERAa的制备:-60℃下,将5.7g ERA10a溶解于57ml正庚烷中,在溶液中通臭氧,直 至该溶液保持蓝色。向溶液中通氮气30分钟,使反应液升温至5℃。加入0.6g10%Lindlar催化剂。向 溶液中通氢气30分钟,然后使反应液升至室温,搅拌2小时。溶液过滤,10ml甲基叔丁基醚冲洗。浓缩 滤液至干,ERAa粗品经庚烷重结晶,得到5.1g ERAa。
实施例6化合物P1a的制备
氩气保护下,严格保证反应容器无水无氧,加入5.8g ERAa,59mg NiBr2,1.78gCrCl2,0.56g铝 屑,3.39ml三甲基氯硅烷,30ml DMF,降温至0-3℃,搅拌30分钟。滴加5.94gERB,保持温度低于 30℃。滴毕后,在室温下搅拌反应24小时。加入20ml甲醇/水(1/1,体积比),搅拌10分钟。加入320ml 甲基叔丁基醚,搅拌10分钟,将反应混合液转移至250ml 1N盐酸和100ml水中。搅拌分层,水层用 100ml甲基叔丁基醚反萃取两次,合并的有机层依次用150ml 1%氯化钠溶液两次和150ml盐水洗涤。 干燥浓缩有机层,将粗产物溶解于少量乙酸乙酯中,加入乙酸乙酯4倍量正己烷将产物结晶析出,干燥得 到6.0g P1a,e.e.>96%,产率62.1%。
实施例7化合物P1b的制备
ERAa的投料量及ERB和ERAa的摩尔比和实施例6相同,采用和实施例6相同的实验条件,得到粗 产物溶解于少量乙酸乙酯中,加入乙酸乙酯4倍量正己烷将产物结晶析出,干燥得到7.9g P1a,e.e.>96%, 产率81.9%。
实施例8化合物P2a和化合物P3a的制备
(1)化合物P2的制备:6.0g P1a溶于500ml四氢呋喃,冷却至-20℃,滴加0.5MNaHMDS的甲苯溶液 75.4g,控制温度不超过-12℃,搅拌反应4小时。将反应液加至200ml50%氯化铵溶液中,加入500ml 正庚烷,搅拌分层。分离有机层,水层用400ml正庚烷反萃取。合并的有机层用400ml饱和氯化钠溶液 洗涤。有机层干燥浓缩,P2a粗品用200ml正庚烷溶解,经硅胶柱纯化得到4.9g P2a。
(2)化合物P3a的制备:4.2g P2溶于30ml二氯甲烷,冷却至-78℃,滴加12.6g 1MDIBALH的二 氯甲烷溶液,控制温度不超过-60℃,滴加0.5ml甲醇。滴加完毕后,搅拌反应10分钟,升温至室温,加 入45ml 1N盐酸和120ml甲基叔丁基醚。搅拌分层,水层用70ml甲基叔丁基醚反萃取。合并有机层, 依次用20ml水、20ml饱和碳酸氢钠和30ml饱和氯化钠溶液洗涤后,干燥浓缩。粗浓缩物经硅胶柱纯化 得到3.6g P3a。
实施例9化合物P2a和化合物P3a的制备2
P1a的投料量及P2a和P1a的摩尔比和实施例8相同,采用和实施例8相同的实验条件,粗浓缩物经 硅胶柱纯化得到3.5g P3a。
实施例10化合物P4a和化合物P5a的制备
(1)化合物P4a的制备:0℃下,3.6g P3a溶于20ml四氢呋喃溶液,滴加5.4ml正丁基锂(1.6M己 烷溶液),控制温度不超过5℃,搅拌反应10分钟。冷却至-78℃,滴加3.9g ERC溶于20ml正己烷的溶 液,保持最高温度不超过-65℃,搅拌反应40分钟。加入20ml饱和氯化铵、40ml甲基叔丁基醚、20ml 水,搅拌分层,干燥浓缩。P4a粗品经制备纯化得到5.6g P4a。
(2)化合物P5a的制备:室温下,5.6g P4a溶于40ml二氯甲烷中,加入3.8g Dess-Martin试剂,搅 拌反应30分钟。加入50ml饱和碳酸氢钠、50ml 10%亚硫酸钠水溶液,搅拌30分钟。加入50ml饱和氯 化钠、300ml正庚烷,搅拌分层。弃去水层,干燥浓缩有机层,经硅胶柱分离,得到5.0g化合物P5a。
实施例11化合物P6及艾日布林的制备
(1)化合物P6的制备:N2保护下,3.1g二碘化钐溶液溶于15ml四氢呋喃中,降温至至内温-78℃。 将5.0g P5a溶解于20ml四氢呋喃中,P5溶液滴加至降温至钐溶液中,控制温度不超过-60℃。搅拌反应 30分钟,加入50ml碳酸钾/酒石酸钾/水(1/10/100)、16ml正庚烷,保持温度不超过-65℃。搅拌升至室温, 加入70ml碳酸钾/酒石酸钾/水(1/10/100)、70ml正庚烷。搅拌分层,有机层干燥浓缩,浓缩物经硅胶柱纯 化得到2.5g P6。
(2)艾日布林的制备:可以参考现有技术公开的任何一种方法由化合物P6制备艾日布林或其甲磺酸。
对比例1
参考CN1216051C中片段A和片段B拼接的方法,重复专利中的投料量、反应条件,片段A和片段B的产 率为33.6%,柱层析过程中出现深褐色分解产物。
对比例2
参考CN104876896AC中片段A和片段B拼接的方法,重复专利中的投料量、反应条件,片段A和片段B的 产率为59.2%,柱层析过程中出现浅褐色分解产物。
对比例3
参考CN105713031A中片段A和片段B拼接的方法,重复专利中的投料量、反应条件,片段A和片段B的 产率为45.8%,柱层析过程中出现褐色分解产物。
Claims (10)
3.根据权利要求2所述方法,其特征在于,反应体系中需加入NiX2,CrCl2,铝屑和三甲基氯硅烷,其中,NiX2为NiBr2或NiCl2。
4.根据权利要求3所述方法,其特征在于,以化合物ERA的投料量为1摩尔当量计,NiBr2的用量为0.02~0.08摩尔当量、CrCl2的用量为0.1~0.3摩尔当量,ERB用量为1.1~2摩尔当量。
5.根据权利要求2所述方法,其中,化合物ERA的制备方法包括:
(1)将化合物ERA2与萘砜基甲基膦酸二乙酯通过wittig反应,转化成化合物ERA3:
(2)化合物ERA3选择性脱去苄基保护,转化成ERA4:
(3)将化合物ERA4的双键通过选择性还原,转化成化合物ERA5:
(4)将化合物ERA5酯键经水解反应,转化成ERA6:
(5)将化合物ERA6的邻二醇经缩酮反应,转化成化合物ERA7:
(6)将化合物ERA7通过甲基化反应,转化成化合物ERA8:
(7)将化合物ERA8结构中的缩酮进行水解,转化成化合物ERA9:
(8)将化合物ERA9羟基经TBS保护得到ERA10:
(9)使ERA10的双键经氧化,得到化合物ERA:
其中,R1为H,C1~6的烷基或卤素。
7.一种艾日布林的制备方法,包括,采用权利要求1所述化合物P1作为中间体制备得到;或者采用包含权利要求2~6任一项所述的方法制备得到。
9.根据权利要求1-8所述化合物或方法,其特征在于,R1为H,R2为Cl或OMs。
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