WO2022209916A1 - (2-メチルピリミジン-5-イル)ボロン酸誘導体の製造方法 - Google Patents
(2-メチルピリミジン-5-イル)ボロン酸誘導体の製造方法 Download PDFInfo
- Publication number
- WO2022209916A1 WO2022209916A1 PCT/JP2022/012043 JP2022012043W WO2022209916A1 WO 2022209916 A1 WO2022209916 A1 WO 2022209916A1 JP 2022012043 W JP2022012043 W JP 2022012043W WO 2022209916 A1 WO2022209916 A1 WO 2022209916A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compound
- reaction
- bromo
- methylpyrimidine
- methylpyrimidin
- Prior art date
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- BTJLWJOEZRVRNL-UHFFFAOYSA-N (2-methylpyrimidin-5-yl)boronic acid Chemical class CC1=NC=C(B(O)O)C=N1 BTJLWJOEZRVRNL-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- NEDJTEXNSTUKHW-UHFFFAOYSA-N 5-bromo-2-methylpyrimidine Chemical compound CC1=NC=C(Br)C=N1 NEDJTEXNSTUKHW-UHFFFAOYSA-N 0.000 claims abstract description 64
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 11
- 238000006114 decarboxylation reaction Methods 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 101
- 239000002904 solvent Substances 0.000 claims description 36
- 239000003153 chemical reaction reagent Substances 0.000 claims description 32
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical group [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 22
- 125000001979 organolithium group Chemical group 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 125000004432 carbon atom Chemical group C* 0.000 claims description 16
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 13
- NHDIQVFFNDKAQU-UHFFFAOYSA-N tripropan-2-yl borate Chemical compound CC(C)OB(OC(C)C)OC(C)C NHDIQVFFNDKAQU-UHFFFAOYSA-N 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 6
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 43
- 150000005710 5-bromopyrimidines Chemical class 0.000 abstract description 24
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 5
- 239000012450 pharmaceutical intermediate Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 91
- 239000000243 solution Substances 0.000 description 52
- 239000002994 raw material Substances 0.000 description 51
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 45
- 239000007788 liquid Substances 0.000 description 37
- 238000002156 mixing Methods 0.000 description 36
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 30
- 239000012295 chemical reaction liquid Substances 0.000 description 26
- -1 ethylene, 1, 1, 2,2-tetramethylethylene group Chemical group 0.000 description 19
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 19
- 239000003960 organic solvent Substances 0.000 description 19
- 239000000126 substance Substances 0.000 description 18
- 239000002253 acid Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 15
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 14
- 125000000217 alkyl group Chemical group 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 12
- 239000010410 layer Substances 0.000 description 12
- IVDFJHOHABJVEH-UHFFFAOYSA-N pinacol Chemical compound CC(C)(O)C(C)(C)O IVDFJHOHABJVEH-UHFFFAOYSA-N 0.000 description 12
- 239000002585 base Substances 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 10
- 238000006460 hydrolysis reaction Methods 0.000 description 10
- 238000003860 storage Methods 0.000 description 10
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000010791 quenching Methods 0.000 description 8
- 238000004128 high performance liquid chromatography Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910052783 alkali metal Inorganic materials 0.000 description 6
- HEIMCPNSTVIQJT-UHFFFAOYSA-N diethyl 2-(5-bromopyrimidin-2-yl)propanedioate Chemical compound CCOC(=O)C(C(=O)OCC)C1=NC=C(Br)C=N1 HEIMCPNSTVIQJT-UHFFFAOYSA-N 0.000 description 6
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 6
- 239000012044 organic layer Substances 0.000 description 6
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 229910052763 palladium Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000003929 acidic solution Substances 0.000 description 4
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- IPWKHHSGDUIRAH-UHFFFAOYSA-N bis(pinacolato)diboron Chemical compound O1C(C)(C)C(C)(C)OB1B1OC(C)(C)C(C)(C)O1 IPWKHHSGDUIRAH-UHFFFAOYSA-N 0.000 description 4
- 239000007810 chemical reaction solvent Substances 0.000 description 4
- 239000004210 ether based solvent Substances 0.000 description 4
- 230000003301 hydrolyzing effect Effects 0.000 description 4
- 239000000543 intermediate Substances 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 3
- OVRKATYHWPCGPZ-UHFFFAOYSA-N 4-methyloxane Chemical compound CC1CCOCC1 OVRKATYHWPCGPZ-UHFFFAOYSA-N 0.000 description 3
- XPGIBDJXEVAVTO-UHFFFAOYSA-N 5-bromo-2-chloropyrimidine Chemical compound ClC1=NC=C(Br)C=N1 XPGIBDJXEVAVTO-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000911 decarboxylating effect Effects 0.000 description 3
- ZOCHARZZJNPSEU-UHFFFAOYSA-N diboron Chemical compound B#B ZOCHARZZJNPSEU-UHFFFAOYSA-N 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- SKTCDJAMAYNROS-UHFFFAOYSA-N methoxycyclopentane Chemical compound COC1CCCC1 SKTCDJAMAYNROS-UHFFFAOYSA-N 0.000 description 3
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 235000011056 potassium acetate Nutrition 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000012312 sodium hydride Substances 0.000 description 3
- 229910000104 sodium hydride Inorganic materials 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 3
- CYPYTURSJDMMMP-WVCUSYJESA-N (1e,4e)-1,5-diphenylpenta-1,4-dien-3-one;palladium Chemical compound [Pd].[Pd].C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1 CYPYTURSJDMMMP-WVCUSYJESA-N 0.000 description 2
- KZPYGQFFRCFCPP-UHFFFAOYSA-N 1,1'-bis(diphenylphosphino)ferrocene Chemical compound [Fe+2].C1=CC=C[C-]1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=C[C-]1P(C=1C=CC=CC=1)C1=CC=CC=C1 KZPYGQFFRCFCPP-UHFFFAOYSA-N 0.000 description 2
- LTMRRSWNXVJMBA-UHFFFAOYSA-L 2,2-diethylpropanedioate Chemical compound CCC(CC)(C([O-])=O)C([O-])=O LTMRRSWNXVJMBA-UHFFFAOYSA-L 0.000 description 2
- MDNDJMCSXOXBFZ-UHFFFAOYSA-N 2-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-5,5-dimethyl-1,3,2-dioxaborinane Chemical compound O1CC(C)(C)COB1B1OCC(C)(C)CO1 MDNDJMCSXOXBFZ-UHFFFAOYSA-N 0.000 description 2
- COBZMDPXIDGRHY-UHFFFAOYSA-N 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine Chemical compound C1=NC(C)=NC=C1B1OC(C)(C)C(C)(C)O1 COBZMDPXIDGRHY-UHFFFAOYSA-N 0.000 description 2
- LNJMHEJAYSYZKK-UHFFFAOYSA-N 2-methylpyrimidine Chemical compound CC1=NC=CC=N1 LNJMHEJAYSYZKK-UHFFFAOYSA-N 0.000 description 2
- UEBSWKNVDRJVHN-UHFFFAOYSA-N 4,4,6-trimethyl-2-(4,4,6-trimethyl-1,3,2-dioxaborinan-2-yl)-1,3,2-dioxaborinane Chemical compound O1C(C)CC(C)(C)OB1B1OC(C)(C)CC(C)O1 UEBSWKNVDRJVHN-UHFFFAOYSA-N 0.000 description 2
- MDERWSRHRJUWNS-UHFFFAOYSA-N 5-bromo-2-methylpyrimidine-4-carboxylic acid Chemical compound CC1=NC=C(Br)C(C(O)=O)=N1 MDERWSRHRJUWNS-UHFFFAOYSA-N 0.000 description 2
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 101150003085 Pdcl gene Proteins 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- YNHIGQDRGKUECZ-UHFFFAOYSA-L bis(triphenylphosphine)palladium(ii) dichloride Chemical compound [Cl-].[Cl-].[Pd+2].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 YNHIGQDRGKUECZ-UHFFFAOYSA-L 0.000 description 2
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 238000004440 column chromatography Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- KUGSJJNCCNSRMM-UHFFFAOYSA-N ethoxyboronic acid Chemical compound CCOB(O)O KUGSJJNCCNSRMM-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 238000004508 fractional distillation Methods 0.000 description 2
- DLEDOFVPSDKWEF-UHFFFAOYSA-N lithium butane Chemical compound [Li+].CCC[CH2-] DLEDOFVPSDKWEF-UHFFFAOYSA-N 0.000 description 2
- CETVQRFGPOGIQJ-UHFFFAOYSA-N lithium;hexane Chemical compound [Li+].CCCCC[CH2-] CETVQRFGPOGIQJ-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229940098779 methanesulfonic acid Drugs 0.000 description 2
- UYVXZUTYZGILQG-UHFFFAOYSA-N methoxyboronic acid Chemical compound COB(O)O UYVXZUTYZGILQG-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- QDLYEPXRLHYMJV-UHFFFAOYSA-N propan-2-yloxyboronic acid Chemical compound CC(C)OB(O)O QDLYEPXRLHYMJV-UHFFFAOYSA-N 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 150000003460 sulfonic acids Chemical class 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- NCNYEGJDGNOYJX-NSCUHMNNSA-N (e)-2,3-dibromo-4-oxobut-2-enoic acid Chemical compound OC(=O)C(\Br)=C(/Br)C=O NCNYEGJDGNOYJX-NSCUHMNNSA-N 0.000 description 1
- QPYKYDBKQYZEKG-UHFFFAOYSA-N 2,2-dimethylpropane-1,1-diol Chemical compound CC(C)(C)C(O)O QPYKYDBKQYZEKG-UHFFFAOYSA-N 0.000 description 1
- WGLLSSPDPJPLOR-UHFFFAOYSA-N 2,3-dimethylbut-2-ene Chemical group CC(C)=C(C)C WGLLSSPDPJPLOR-UHFFFAOYSA-N 0.000 description 1
- WYBQOWXCLDXZNR-UHFFFAOYSA-N 2-(1,3,2-benzodioxaborol-2-yl)-1,3,2-benzodioxaborole Chemical compound O1C2=CC=CC=C2OB1B1OC2=CC=CC=C2O1 WYBQOWXCLDXZNR-UHFFFAOYSA-N 0.000 description 1
- OKHWOUVPFMFZOS-UHFFFAOYSA-N 2-(5-bromopyrimidin-2-yl)-3-methoxy-3-oxopropanoic acid Chemical compound COC(=O)C(C(O)=O)C1=NC=C(Br)C=N1 OKHWOUVPFMFZOS-UHFFFAOYSA-N 0.000 description 1
- YQYYPMJYPKZCQM-UHFFFAOYSA-N 2-(5-bromopyrimidin-2-yl)propanedioic acid Chemical compound OC(=O)C(C(O)=O)C1=NC=C(Br)C=N1 YQYYPMJYPKZCQM-UHFFFAOYSA-N 0.000 description 1
- NGGGZUAEOKRHMA-UHFFFAOYSA-M 3-[(2-methylpropan-2-yl)oxy]-3-oxopropanoate Chemical compound CC(C)(C)OC(=O)CC([O-])=O NGGGZUAEOKRHMA-UHFFFAOYSA-M 0.000 description 1
- ZEZKXPQIDURFKA-UHFFFAOYSA-N 5-bromo-2-iodopyrimidine Chemical compound BrC1=CN=C(I)N=C1 ZEZKXPQIDURFKA-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- DOAWAPMAGRFVEW-UHFFFAOYSA-N CC1=NC=C(C=N1)[Li] Chemical compound CC1=NC=C(C=N1)[Li] DOAWAPMAGRFVEW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000004453 alkoxycarbonyl group Chemical group 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
- 239000012062 aqueous buffer Substances 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 description 1
- 125000005620 boronic acid group Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 150000004292 cyclic ethers 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
- NXQGGXCHGDYOHB-UHFFFAOYSA-L cyclopenta-1,4-dien-1-yl(diphenyl)phosphane;dichloropalladium;iron(2+) Chemical compound [Fe+2].Cl[Pd]Cl.[CH-]1C=CC(P(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1.[CH-]1C=CC(P(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 NXQGGXCHGDYOHB-UHFFFAOYSA-L 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 125000004663 dialkyl amino group Chemical group 0.000 description 1
- FOFGLOQJGFTCNS-UHFFFAOYSA-N diethyl 2-(5-bromopyridin-2-yl)propanedioate Chemical compound CCOC(=O)C(C(=O)OCC)C1=CC=C(Br)C=N1 FOFGLOQJGFTCNS-UHFFFAOYSA-N 0.000 description 1
- 125000001664 diethylamino group Chemical group [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- AXAZMDOAUQTMOW-UHFFFAOYSA-N dimethylzinc Chemical compound C[Zn]C AXAZMDOAUQTMOW-UHFFFAOYSA-N 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- AZHSSKPUVBVXLK-UHFFFAOYSA-N ethane-1,1-diol Chemical compound CC(O)O AZHSSKPUVBVXLK-UHFFFAOYSA-N 0.000 description 1
- WCQOBLXWLRDEQA-UHFFFAOYSA-N ethanimidamide;hydrochloride Chemical compound Cl.CC(N)=N WCQOBLXWLRDEQA-UHFFFAOYSA-N 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000003754 ethoxycarbonyl group Chemical group C(=O)(OCC)* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910052740 iodine Inorganic materials 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
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 1
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 1
- LTVBQYKXPQPFBJ-UHFFFAOYSA-N lithium;heptane Chemical compound [Li+].CCCCCC[CH2-] LTVBQYKXPQPFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 description 1
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 description 1
- ZIYVHBGGAOATLY-UHFFFAOYSA-N methylmalonic acid Chemical compound OC(=O)C(C)C(O)=O ZIYVHBGGAOATLY-UHFFFAOYSA-N 0.000 description 1
- 125000002816 methylsulfanyl group Chemical group [H]C([H])([H])S[*] 0.000 description 1
- PKDBSOOYVOEUQR-UHFFFAOYSA-N mucobromic acid Natural products OC1OC(=O)C(Br)=C1Br PKDBSOOYVOEUQR-UHFFFAOYSA-N 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- ULYNIEUXPCUIEL-UHFFFAOYSA-L palladium(2+);triethylphosphane;dichloride Chemical compound [Cl-].[Cl-].[Pd+2].CCP(CC)CC.CCP(CC)CC ULYNIEUXPCUIEL-UHFFFAOYSA-L 0.000 description 1
- LXNAVEXFUKBNMK-UHFFFAOYSA-N palladium(II) acetate Substances [Pd].CC(O)=O.CC(O)=O LXNAVEXFUKBNMK-UHFFFAOYSA-N 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 125000004528 pyrimidin-5-yl group Chemical group N1=CN=CC(=C1)* 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 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
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- AJSTXXYNEIHPMD-UHFFFAOYSA-N triethyl borate Chemical compound CCOB(OCC)OCC AJSTXXYNEIHPMD-UHFFFAOYSA-N 0.000 description 1
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 1
Images
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
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/025—Boronic and borinic acid compounds
-
- 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
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
Definitions
- the present invention relates to a method for producing (2-methylpyrimidin-5-yl)boronic acid derivatives useful as pharmaceutical intermediates.
- 5-bromo-2-methylpyrimidine is prepared by reacting 5-bromo-2-iodopyrimidine with dimethylzinc in the presence of a palladium catalyst. Subsequently, this is reacted with n-butyllithium at ⁇ 78° C. to convert to 2-methyl-5-lithiopyrimidine, reacted with triisopropoxyborane, and subjected to a hydrolysis reaction (2-methyl Pyrimidin-5-yl)boronic acid is produced (Patent Document 1).
- Patent Document 1 has a problem in that it uses heavy metal reagents that have a large environmental impact in the process of producing 5-bromo-2-methylpyrimidine. Further, in the process of producing 5-bromo-2-methylpyrimidine described in Patent Document 2, although heavy metal reagents are not used, the process of synthesizing 5-bromo-2-methylpyrimidine-4-carboxylic acid yield is 42%, and the yield of the subsequent step of synthesizing 5-bromo-2-methylpyrimidine is 61%, which requires improvement in terms of yield.
- the present inventors have developed a method for producing a (2-methylpyrimidin-5-yl)boronic acid derivative that can be carried out on an industrial scale, and have completed the present invention. That is, the present invention relates to the following [1] to [8].
- a (2-methylpyrimidin-5-yl)boronic acid derivative useful as a pharmaceutical intermediate can be efficiently produced by a method with less environmental impact. More specifically, according to the present invention, 5-bromo-2-methylpyrimidine, which is a synthetic intermediate for (2-methylpyrimidin-5-yl)boronic acid derivatives, can be efficiently produced without using heavy metal reagents. can be manufactured.
- FIG. 1 is a schematic diagram showing an example of the configuration of a flow reactor employed in the present invention.
- the 5-bromopyrimidine derivative which is the raw material of the present invention, has the following formula (1); (In the formula, R 1 represents a hydrogen atom or CO 2 H.).
- 5-bromo-2-methylpyrimidine an intermediate of the present invention, has the following formula (2); is represented by
- the product of the present invention (2-methylpyrimidin-5-yl)boronic acid derivative, has the following formula (3); (In the formula, R 2 and R 3 each independently represent a hydrogen atom or an optionally substituted alkyl group having 1 to 6 carbon atoms. may be formed.).
- alkyl groups having 1 to 6 carbon atoms represented by R 2 and R 3 include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group and tert-butyl group. , n-pentyl group and neopentyl group; and cycloalkyl groups such as cyclopropyl group, cyclopentyl group and cyclohexyl group.
- R 2 and R 3 When R 2 and R 3 together form a ring, R 2 and R 3 combine to form a ring consisting of the group together and the boron and oxygen atoms.
- the group in which R 2 and R 3 are bonded together means * -R 2a -R 3a -* (* indicates a bond with an oxygen atom; and R 3a is a divalent group obtained by removing one hydrogen atom from R 3 ), such as ethylene, 1, 1, 2,2-tetramethylethylene group, 1,1'-bicyclohexane-1,1'-diyl group, 2,2-dimethylpropane-1,3-diyl group and the like.
- the ring formed by R 2 and R 3 together is preferably a 5- or 6-membered ring, more preferably a 5-membered ring.
- specific examples of (2-methylpyrimidin-5-yl)boronic acid derivatives include compounds represented by the following formulas (4) to (7), etc. Among them, a compound represented by the following formula (4) or (5) is preferable.
- substituents that the alkyl group having 1 to 6 carbon atoms may have include halogen atoms such as a fluorine atom, a chlorine atom, a bromine atom and an iodine atom; alkoxy groups such as a methoxy group and an ethoxy group; epoxy groups and the like.
- cyclic ether group such as methylthio group; acetyl group; cyano group; nitro group; alkoxycarbonyl group such as methoxycarbonyl group and ethoxycarbonyl group; dialkylamino group such as dimethylamino group and diethylamino group.
- the number of substituents that the alkyl group having 1 to 6 carbon atoms has is not particularly limited.
- both R 2 and R 3 are hydrogen atoms or isopropyl groups, or R 2 and R 3 are bonded together to form a 1,1,2,2-tetramethylethylene group. and more preferably both R 2 and R 3 are hydrogen atoms.
- the 5-bromopyrimidine derivative (1) (hereinafter sometimes referred to as compound (1)
- a step of synthesizing the 5-bromo-2-methylpyrimidine (2) (hereinafter sometimes referred to as compound (2)) by decarboxylating the carboxyl group from the compound (2) will be described.
- Compound (1) which is a raw material in the above step, can be obtained, for example, by hydrolyzing a compound represented by the following formula (1a) (hereinafter sometimes referred to as compound (1a)).
- R 1a represents a hydrogen atom or —COOR 4a .
- R 4 and R 4a represent an alkyl group.
- the alkyl group represented by R 4 and R 4a is preferably an alkyl group having 1 to 6 carbon atoms. Specific examples include the same groups as those described as the alkyl groups having 1 to 6 carbon atoms represented by R 2 and R 3 . Alkyl groups are more preferred.
- R 1a is preferably -COOR 4a .
- the hydrolysis reaction is usually carried out in the presence of water and an acid or base.
- a solvent a water-soluble organic solvent may be used together with the water.
- alcoholic solvents such as methanol, ethanol, n-propanol, isopropanol, n-butanol and ethylene glycol are preferred.
- the amount of the solvent used is not preferable in terms of cost and post-treatment if it is too large, so the upper limit is preferably 50 times the weight or less, more preferably 20 times the weight or less, relative to the compound (1a). is.
- the lower limit of the amount of the solvent to be used is, for example, 1-fold weight or more with respect to the compound (1a).
- Examples of the base include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide.
- the base one type may be used alone, or two or more types may be used in combination.
- Examples of the acid include inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid; organic acids such as sulfonic acids such as methanesulfonic acid; and carboxylic acids such as acetic acid and citric acid.
- the acid you may use individually by 1 type, and may use 2 or more types together.
- 1 to 10 mol of acid or base is preferably used per 1 mol of compound (1a).
- the reaction temperature is preferably 20-120°C, more preferably 30-80°C.
- the reaction time is usually 0.1 to 24 hours.
- the compound (1) When the hydrolysis reaction is carried out in the presence of an acid, the compound (1) can be synthesized directly, but when the hydrolysis reaction is carried out in the presence of a base, an alkali metal salt of the compound (1) can be hydrolyzed. Since a hydrolyzate (salt) is obtained, a step of synthesizing compound (1) from the hydrolyzate (salt) is required. When the hydrolysis reaction is carried out in the presence of a base, the hydrolyzate (salt) may be isolated or purified as necessary after the hydrolysis reaction is completed.
- Compound (1) may be synthesized by treating the decomposition product (salt) as it is in the reaction mixture. Specifically, compound (1) can be synthesized by adding an acid to the reaction mixture.
- the solution obtained by adding acid to the reaction mixture may be referred to as "compound (1)-containing acidic solution".
- the acid include inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid; organic acids such as sulfonic acids such as methanesulfonic acid; and carboxylic acids such as acetic acid and citric acid.
- inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid
- organic acids such as sulfonic acids such as methanesulfonic acid
- carboxylic acids such as acetic acid and citric acid.
- the amount of acid to be used is preferably such that the pH of the acidic solution containing compound (1) becomes 2-5.
- the reaction mixture Compound (1) can be obtained by performing a general treatment for obtaining the product from.
- a common extraction solvent such as toluene, methylene chloride, diethyl ether, ethyl acetate, hexane, tetrahydrofuran, 2-methyltetrahydrofuran, etc. is added to the reaction solution to extract compound (1), and the resulting extract is decompressed.
- the compound (1) is obtained by distilling off the reaction solvent and extraction solvent by heating or the like.
- the compound (1) thus obtained has sufficient purity to be used in subsequent steps, but fractional distillation is carried out for the purpose of further increasing the yield in subsequent steps or the purity of the compound obtained in subsequent steps.
- the purity may be further increased by general purification techniques such as column chromatography, activated carbon treatment, and the like.
- the decarboxylation step may be carried out without isolating compound (1) from the acidic solution containing compound (1) or the reaction solution obtained by performing the hydrolysis reaction in the presence of an acid. Further, when the hydrolysis reaction is carried out in the presence of an acid, decarboxylation may proceed immediately after the hydrolysis proceeds.
- the method for producing the compound represented by the formula (1a) is not particularly limited, for example, Tetrahedron, 2009, 65, 757-764.
- Method b 2-(5-bromopyrimidin-2-yl)malonic acid dialkyl ester by reacting 5-bromo-2-chloropyrimidine with a malonic acid dialkyl ester (eg, diethyl malonate, etc.) in the presence of sodium hydride.
- a method for producing (a compound represented by formula (1a) in which R 1a is —COOR 4a ; for example, diethyl 2-(5-bromopyrimidin-2-yl)malonate).
- the decarboxylation reaction proceeds to obtain the desired 5-bromo-2-methylpyrimidine (2).
- the reaction may be carried out in the absence of a solvent, but may be carried out by adding a solvent for the purpose of improving heating efficiency and operability.
- the solvent is not particularly limited, it is preferably an alcoholic solvent or water, and more preferably an alcohol having 1 to 5 carbon atoms or water. Specifically, they are methanol, ethanol, n-propanol, isopropanol, n-butanol, ethylene glycol, or water, more preferably ethanol or water. These solvents may be used alone or in combination of two or more, and there is no particular limitation on the mixing ratio.
- the amount of the solvent used is not preferable in terms of cost and post-treatment if it is too large, so the upper limit is preferably 50 times the weight or less, more preferably 20 times the weight or less, relative to the compound (1). is.
- the lower limit of the amount of the solvent used is, for example, 1-fold weight or more, preferably 5-fold weight or more, relative to the compound (1).
- the upper limit of the reaction temperature in this step is preferably 150°C, more preferably 100°C, and particularly preferably 80°C.
- the lower limit is preferably 0°C, more preferably 30°C.
- the reaction time in this step is not particularly limited and may be set as appropriate, preferably 0.001 to 72 hours, more preferably 0.1 to 48 hours.
- the aforementioned acidic solution containing compound (1) is placed under appropriate conditions (preferably under heating conditions) to continuously hydrolyze and decarboxylate compound (1a).
- a general treatment for obtaining a product from the reaction solution may be performed.
- a common extraction solvent such as toluene, methylene chloride, diethyl ether, ethyl acetate, hexane, tetrahydrofuran, 2-methyltetrahydrofuran, etc. is added to the reaction solution to extract compound (2), and the resulting extract is subjected to reduced pressure,
- the compound (2) is obtained by distilling off the reaction solvent and extraction solvent by heating or the like.
- the compound (2) thus obtained has sufficient purity to be used in subsequent steps, but fractional distillation is carried out for the purpose of further increasing the yield in the subsequent steps or the purity of the compound obtained in the subsequent steps.
- the purity may be further increased by general purification techniques such as column chromatography, activated carbon treatment, and the like.
- 5-bromo-2-methylpyrimidine (2) can be efficiently synthesized without using heavy metal reagents that impose a large burden on the environment.
- the overall yield is, for example, 75% or more, preferably 80% or more, more preferably 85% or more. be.
- a mixture containing 5-bromo-2-methylpyrimidine (2) and a trialkoxyboron compound into contact with an organolithium reagent.
- the target compound (3) can be obtained in a higher yield.
- said mixture is provided in solution and said organolithium reagent is also preferably provided in solution.
- the mixture is used as a solution, it is preferable to prepare a raw material solution A in which 5-bromo-2-methylpyrimidine (2) and a trialkoxyboron compound are dissolved in an organic solvent.
- the organolithium reagent is used as a solution, it is preferable to prepare a raw material solution B in which the organolithium reagent is dissolved in an organic solvent.
- trialkoxyboron compound examples include compounds represented by the following formula (30).
- R 2 and R 3 are the same as above, and R 30 represents an alkyl group.
- the alkyl group represented by R 30 is preferably an alkyl group having 1 to 6 carbon atoms. Specific examples include the same groups as those described as the alkyl groups having 1 to 6 carbon atoms represented by R 2 and R 3 . An alkyl group is more preferred, and a methyl group, ethyl group, or isopropyl group is even more preferred.
- trialkoxyboron compounds include trimethoxyborane, triethoxyborane, triisopropoxyborane, ethylene glycol methoxyboronate, pinacol methoxyboronate, pinacol ethoxyboronate, and pinacol isopropoxyboronate. , preferably triisopropoxyborane, pinacol methoxyboronate, pinacol ethoxyboronate, and pinacol isopropoxyboronate, more preferably triisopropoxyborane.
- the amount of the trialkoxyboron compound used is, for example, 0.1 to 10 equivalents, preferably 0.5 to 10 equivalents, more preferably 0.5 to 10 equivalents, relative to the 5-bromo-2-methylpyrimidine (2). is 0.8 to 5 equivalents, particularly preferably 1 to 2 equivalents.
- the equivalent weight is a value obtained by dividing the amount of substance of the trialkoxyboron compound by the amount of substance of 5-bromo-2-methylpyrimidine (2).
- organic lithium reagent examples include methyllithium, n-butyllithium, sec-butyllithium, tert-butyllithium, n-hexyllithium, n-heptyllithium, and phenyllithium. Preferred are n-butyllithium and n-hexyllithium, and more preferred is n-butyllithium.
- the amount of the organic lithium reagent used is, for example, 0.1 to 10 equivalents, preferably 0.5 to 10 equivalents, more preferably 0.8 to 5 equivalents, relative to the compound (2). and particularly preferably 1 to 2 equivalents. Further, the amount of the organolithium reagent is preferably adjusted to 1.05 to 5 equivalents, more preferably 1.10 to 3 equivalents, still more preferably 1.13 to 2 equivalents, relative to the compound (2). Thus, the target (2-methylpyrimidin-5-yl)boronic acid derivative (3) can be produced more efficiently.
- the equivalent is a value obtained by dividing the substance amount of the organolithium reagent by the substance amount of the compound (2).
- a solution containing 5-bromo-2-methylpyrimidine (2) and a trialkoxyboron compound contains 5-bromo-2-methylpyrimidine (2) and a trialkoxyboron compound in an organic solvent (hereinafter referred to as It is prepared by dissolving in an organic solvent A).
- organic solvent A examples include aliphatic hydrocarbon solvents such as n-hexane, n-heptane, cyclohexane, and methylcyclohexane; aromatic hydrocarbon solvents such as benzene, toluene, and xylene; diethyl ether, diisopropyl ether, Ether solvents such as tetrahydrofuran, 2-methyltetrahydrofuran, 4-methyltetrahydropyran, methyl tert-butyl ether, 1,4-dioxane and cyclopentylmethyl ether can be used.
- organic solvents A may be used alone or in combination of two or more, and there is no particular limitation on the mixing ratio.
- the amount of the organic solvent A used is, for example, 0.1 parts by weight or more, preferably 0.5 parts by weight or more, more preferably 1.0 parts by weight or more, relative to 1 part by weight of the compound (2).
- it is 100 parts by weight or less, preferably 50 parts by weight or less, more preferably 30 parts by weight or less, and particularly preferably 10 parts by weight or less.
- Raw material liquid B is prepared by dissolving an organic lithium reagent in an organic solvent (hereinafter sometimes referred to as organic solvent B).
- organic solvent B include aliphatic hydrocarbon solvents such as n-hexane, n-heptane, cyclohexane, and methylcyclohexane; aromatic hydrocarbon solvents such as benzene, toluene, and xylene; diethyl ether, diisopropyl ether, Ether solvents such as tetrahydrofuran, 2-methyltetrahydrofuran, 4-methyltetrahydropyran, methyl tert-butyl ether, 1,4-dioxane and cyclopentylmethyl ether can be used.
- organic solvents B may be used alone or in combination of two or more, and there is no particular limitation on the mixing ratio.
- step c from the viewpoint of storage stability of the organolithium reagent, it is preferable to use at least one solvent selected from the group consisting of aliphatic hydrocarbon solvents and aromatic hydrocarbon solvents, more preferably to n- It is at least one selected from the group consisting of xane, n-heptane, cyclohexane, methylcyclohexane, and toluene.
- the amount of the organic solvent B used is, for example, 0.1 parts by weight or more, preferably 0.5 parts by weight or more, more preferably 1.0 parts by weight or more, relative to 1 part by weight of the compound (2). and, for example, 100 parts by weight or less, preferably 50 parts by weight or less, and more preferably 30 parts by weight or less.
- the amount of the organic solvent B used is, for example, 0.1 parts by weight or more, preferably 0.5 parts by weight or more, more preferably 1.0 parts by weight or more with respect to 1 part by weight of the organic lithium reagent, For example, it is 100 parts by weight or less, preferably 50 parts by weight or less, more preferably 30 parts by weight or less.
- the reaction temperature in method c can be, for example, 100°C or lower, preferably 50°C or lower, and more preferably 25°C or lower. However, when a batch system is employed in method c, cryogenic conditions such as less than -70°C are required in order to increase the yield.
- the lower limit of the reaction temperature is, for example, -90°C or higher.
- the reaction solution obtained in this way is properly post-treated as necessary.
- water acidic aqueous solutions such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, citric acid, and ammonium chloride; alkaline aqueous solutions such as sodium hydroxide, potassium carbonate, and sodium hydrogen carbonate;
- a reagent quenching agent
- an organic solvent such as ethyl acetate or toluene may be added to the obtained reaction solution or quenched solution to extract the target compound.
- the amount of water, acidic aqueous solution, and alkaline aqueous solution used for the quenching is not particularly limited, but the lower limit is usually 0.1 times the weight of the reaction substrate (that is, the compound (2) as a raw material), preferably is 0.5 times the weight, more preferably 1 times the weight, and the upper limit is 100 times the weight, preferably 80 times the weight, more preferably 50 times the weight.
- the product (2-methylpyrimidin-5-yl)boronic acid derivative (3) is converted to a boronate ester (that is, at least one of R 2 and R 3 in formula (3) has a substituent or a compound in which R 2 and R 3 together form a ring), the reaction solution is added to water and an acid or the like is added at the same time to adjust the pH. should be maintained near neutrality. If the product is to be obtained as (2-methylpyrimidin-5-yl)boronic acid (that is, a compound in which both R 2 and R 3 in formula (3) are hydrogen atoms), the pH of the quenching reaction solution should be kept acidic.
- an organic solvent such as ethyl acetate or toluene may be added to perform quenching in a water-organic solvent two-layer system.
- the extract can be further washed with acid water, inorganic salt water, or water, if necessary.
- the target compound can be obtained by distilling off the reaction solvent and extraction solvent from the resulting extract by heating under reduced pressure or the like.
- the target compound thus obtained has sufficient purity to be used in subsequent steps.
- the purity may be further increased by general purification techniques such as chromatography and activated carbon treatment.
- diboronic acid ester compounds used in method d include compounds represented by the following formula (31).
- R 21 and R 31 each independently represent a hydrogen atom or an optionally substituted alkyl group having 1 to 6 carbon atoms. Also, R 21 and R 31 may together form a ring.
- the optionally substituted alkyl group having 1 to 6 carbon atoms represented by R 21 and R 31 is an optionally substituted alkyl group having 1 to 6 carbon atoms represented by R 2 and R 3 . is the same as the group described as the alkyl group of and preferred embodiments thereof are also the same.
- the ring formed by R 21 and R 31 together is the same as the ring formed by R 2 and R 3 together, and preferred embodiments thereof are also the same.
- R 2 and R 3 may be the same as or different from R 21 and R 31 and are preferably the same.
- diboronic acid ester compounds include bis(neopentyl glycolato)diboron, bis(pinacolato)diboron, bis(hexylene glycolato)diboron, bis(catecholato)diboron, bis(ethanediolate)diboron, bis(n -propanediolato)diboron, bis(neopentanediolate)diboron, etc.
- bis(neopentylglycolato)diboron, bis(pinacolato)diboron, or bis(hexyleneglycolato)diboron is preferred.
- the amount of the diboronic acid ester compound used is preferably 0.5 to 10 equivalents, more preferably 0.8 to 5 equivalents, particularly preferably 1 to 2 equivalents, relative to the compound (2).
- the equivalent is a value obtained by dividing the substance amount of the diboronic acid ester compound by the substance amount of the compound (2).
- Palladium catalysts used in method d include palladium(II) acetate, tetrakis(triphenylphosphine)palladium(0), dichlorobis(triphenylphosphine)palladium(II), dichlorobis(triethylphosphine)palladium(II), tris( dibenzylideneacetone)dipalladium(0), 1,1′-bis(diphenylphosphino)ferrocenepalladium(II) chloride and the like.
- the amount of the palladium catalyst used is, for example, 0.0001 to 0.1 equivalents, preferably 0.001 to 0.01 equivalents, relative to the compound (2).
- the equivalent is a value obtained by dividing the substance amount of the palladium catalyst by the substance amount of the compound (2).
- Bases used in method d include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkali metal alkoxides such as sodium methoxide; alkali metal hydrogen carbonates such as sodium hydrogen carbonate and potassium hydrogen carbonate; alkali metal carbonates such as sodium and potassium carbonate; alkali metal phosphates such as potassium phosphate; organic acid alkali metal salts such as sodium acetate and potassium acetate; Among these, alkali metal salts of organic acids are preferred, and alkali metal salts of acetic acid are more preferred.
- the amount of the base used is preferably 0.5 to 10 equivalents, more preferably 0.8 to 5 equivalents, and particularly preferably 1 to 3 equivalents, relative to the compound (2).
- the equivalent is the substance amount of the base/the substance amount of the compound (2).
- Method d it is preferable to carry out the reaction in the presence of a solvent.
- the solvent used in Method d include the aliphatic hydrocarbon solvents, aromatic hydrocarbon solvents, and ether solvents described as the organic solvent A above. These solvents may be used alone or in combination of two or more, and there is no particular limitation on the mixing ratio. In method d, it is preferred to use an ether solvent.
- the amount of the solvent used is, for example, 0.1 parts by weight or more, preferably 0.5 parts by weight or more, more preferably 1.0 parts by weight or more, relative to 1 part by weight of the compound (2). , for example, 100 parts by weight or less, preferably 50 parts by weight or less, more preferably 30 parts by weight or less.
- the reaction temperature is preferably 20-120°C, more preferably 50-100°C, still more preferably 70-90°C.
- the reaction time is not particularly limited, but is, for example, 30 minutes to 24 hours, preferably 1 hour to 12 hours.
- the reaction solution obtained in this way is properly post-treated as necessary.
- the target compound can be obtained by distilling off the reaction solvent by an operation such as heating under reduced pressure.
- the target compound thus obtained has sufficient purity to be used in subsequent steps.
- the purity may be further increased by general purification techniques such as chromatography and activated carbon treatment.
- a batch system may be employed, or production may be performed using a flow reactor.
- a flow reactor when a flow reactor is used in method c, it can be efficiently carried out without requiring ultra-low temperature conditions such as the reaction at -78 ° C. that is carried out in Patent Document 1, and from the viewpoint of production on an industrial scale. is preferred.
- the (2-methylpyrimidin-5-yl)boronic acid derivative (3) may be produced by reacting the organolithium reagent solution (raw material solution B) taken in from another raw material supply route 2 .
- the flow reactor includes a microflow reactor that uses submillimeter-order microchannels and a chemical reaction device that is a scaled-up version of this microflow reactor. Due to its fine reaction field (microchannel), the microflow reactor has high-speed mixing performance (for example, when two liquids are mixed in a microspace, the diffusion distance of the two liquids is shortened, resulting in remarkable mass transfer). heat removal performance (because the reaction field is small, thermal efficiency is extremely high and temperature control is easy), reaction control performance, interface control performance, etc., and the overall process can be made compact. It has advantages such as improved safety, significant reduction in equipment costs, process enhancement by incorporating it into existing processes, and the ability to manufacture substances that could not be manufactured by existing production methods.
- Flow reactors also include chemical reactors with increased operability by enlarging the flow channel diameter to the order of millimeters to centimeters without impairing the characteristics of micro flow reactors.
- the flow-type reactor has two or more raw material supply channels (which may be a raw material liquid feeding section or a raw material supply line.
- a mixing section for mixing the raw materials, a reaction section for circulating the reaction liquid mixed with the raw materials also referred to as a reactor channel, a retention channel, etc., may be a reactor line or a retention line
- a reaction section and a reaction liquid discharge channel which may be a reaction liquid discharge section or a reaction liquid discharge line; sometimes specified as a "reaction liquid discharge port” for discharging the reaction liquid.
- the boundary between the mixing section and the reaction section may not be clear, may change continuously, may be integrated without distinction (hereinafter referred to as may be referred to as a mixing/reaction section), and the mixing section and the reaction section may be independent.
- the channels of the mixing section and the reaction section may be fine channels, or may be linear or spiral channels such as pipes.
- the flow reactor may include a reaction liquid storage container that receives the reaction liquid discharged from the reaction liquid discharge channel.
- the reaction liquid storage container may contain a quenching agent in advance to stop the reaction, or the reaction may be stopped by adding the quenching agent after storing the reaction liquid in the reaction liquid storage container.
- the flow reactor may be equipped with a liquid transfer device such as a pump.
- the flow reactor has a temperature control device (temperature control chamber, temperature control bath, jacket container, heat medium flow path, etc.). Furthermore, the flow reactor may be equipped with a temperature sensor for checking the temperature of the reaction solution.
- FIG. 1 is a schematic diagram of an example of the configuration of a chemical reactor that can be used in the present invention.
- the chemical reactor (flow reactor 12) has two or more raw material supply channels (raw material supply channels 1 and 5 in the example of FIG. 1) for separately taking in the raw material liquid A and the raw material liquid B. and 2, 6), which mixes the raw material liquid A and the raw material liquid B supplied from these raw material supply channels and reacts the reaction liquid (mixing/reacting section 7 in the example of FIG. ) and a reaction liquid discharge channel (the reaction liquid discharge channel 10 in the example of FIG. 1) for discharging the reaction liquid.
- a temperature control device for controlling the reaction temperature (temperature control device 9 in the example of FIG. 1) and a temperature sensor (temperature sensor 8 in the example of FIG. 1) for checking the internal temperature are provided.
- temperature control device 9 in the example of FIG. 1 and a temperature sensor (temperature sensor 8 in the example of FIG. 1) for checking the internal temperature
- temperature control device 9 in the example of FIG. 1 may be
- liquid-sending pumps such as diaphragm pumps, syringe pumps, plunger pumps, and peristaltic pumps may be used as liquid-sending devices 3 and 4 for supplying raw material liquids to the mixing/reacting section 7 .
- FIG. 1 shows a static mixer as a mixer used in the mixing/reaction section 7, it may be a helix mixer.
- the mixing section and the reaction section can take various shapes.
- a T-shaped mixer also referred to as a T-shaped tube
- a Y-shaped mixer also referred to as a Y-shaped tube
- a V-shaped mixer also referred to as a V-shaped tube
- the reaction section may have a structure in which minute channels are cut in a plate-like plate, or may have a structure in which these plate plates are stacked in layers, and a tubular tube with a very small diameter may be used. good too.
- the tubular tube may have a straight structure, a structure that is bent many times, or a helical structure.
- the mixing/reaction section 7 is preferably tubular, and the cross-sectional shape of the flow path may be circular, polygonal, or distorted circular (e.g., convex or concave), more preferably circular or Polygon.
- the length of the mixing/reaction section 7 may be appropriately set according to the reaction time (residence time), and is, for example, 0.5 cm or longer, preferably 1.0 cm or longer.
- the upper limit of the length of the mixing/reaction section 7 is, for example, 100 m or less, preferably 10 m or less.
- the channel cross-sectional area of the mixing/reaction section 7 is, for example, 0.01 mm 2 or more, preferably 0.15 mm 2 or more, and more preferably 0.3 mm 2 or more.
- the upper limit of the channel cross-sectional area of the mixing/reaction section is, for example, 300 cm 2 or less, preferably 70 cm 2 or less, and more preferably 30 cm 2 or less.
- the material of the mixing/reaction section 7 is not particularly limited, and may be appropriately selected according to requirements such as solvent resistance, pressure resistance, and heat resistance.
- metals such as stainless steel, Hastelloy, titanium, copper, nickel, and aluminum, resins such as PEEK resin, silicone resin, and fluorine resin, glass, ceramics, and SiC can be used.
- reaction liquid storage container 11 for receiving the reaction liquid in FIG.
- the chemical reaction device that can be used in the present invention is not limited to the flow reactor shown in FIG. 1, and known devices such as a plate-type micro-flow reactor, a cyclone-type reactor, and a laminated microfluidic chip can also be used as appropriate. can.
- the time (reaction time, residence time) during which the reaction solution in which raw material solution A and raw material solution B are mixed flows through the mixing/reaction section of the flow reactor depends on the type and concentration of raw material solution A and raw material solution B and the flow path. It may be set as appropriate according to the flow velocities at which the raw material liquid A and the raw material liquid B are circulated. , for example, 15 minutes or less, preferably 10 minutes or less, more preferably 5 minutes or less.
- the flow rate at which the raw material liquid A and the raw material liquid B flow through the raw material supply channel and the flow rate at which the reaction liquid of the raw material liquid A and the raw material liquid B flow through the mixing/reaction section depends on the type of the raw material liquid A and the raw material liquid B and the mixing/ It may be appropriately set according to the residence time in the reaction section, for example, it is 0.01 mL/min or more, preferably 0.1 mL/min or more, more preferably 0.5 mL/min or more, such as , 5000 mL/min or less, preferably 3000 mL/min or less, more preferably 1000 mL/min (60 L/h) or less.
- the amount of the organolithium reagent in the reaction section (which may be the mixing/reaction section) is, for example, 0.1 to 10 equivalents, preferably 0.5 to 10 equivalents, relative to the compound (2). more preferably 0.8 to 5 equivalents, particularly preferably 1 to 2 equivalents. Further, the amount of the organolithium reagent in the reaction section (which may be the mixing/reaction section) is preferably 1.05 to 5 equivalents, more preferably 1.10 to 2 equivalents, relative to the compound (2). (2-methylpyrimidin-5-yl)boronic acid derivative (3), which is the target product, can be produced more efficiently.
- the equivalent is a value obtained by dividing the substance amount of the organolithium reagent by the substance amount of the compound (2).
- the amount of the organic lithium reagent with respect to the compound (2) in the reaction section is determined by the concentrations of the compound (2) and the organic lithium reagent in the raw material liquids A and B, It can be adjusted by adjusting the flow velocities of the liquid A and the raw material liquid B.
- the flow reactor has a device for adjusting the temperature of the mixing/reaction section (temperature control chamber, temperature control bath, jacket container, etc. Temperature control device 9 in FIG. 1) for each mixing/reaction section independently or It may be provided in common.
- the reaction temperature of the raw material liquid A and the raw material liquid B set temperature of the temperature control device
- the reaction temperature in the method c described above can be adopted.
- the reaction can be carried out efficiently without requiring ultra-low temperature conditions.
- C. or higher preferably -50.degree. C. or higher, more preferably -40.degree. C. or higher, for example, 100.degree. C. or lower, preferably 50.degree.
- the reaction liquid discharged from the mixing/reaction section is properly post-treated as necessary.
- the reaction liquid discharged from the mixing/reaction section 7 is collected in the reaction liquid storage container 11, and then the post-treatment process is performed. , the reaction of the reaction liquid collected in the reaction storage vessel 11 may be stopped (quenched).
- Post-treatment steps such as quenching are the same as those described in method c above.
- compound (2) which is a synthetic intermediate for compound (3) useful as a pharmaceutical intermediate
- two steps immediately before obtaining the target compound (3) (the step of synthesizing compound (2) by decarboxylating the carboxyl group from compound (1), and Step of producing compound (3) from compound (2)) or step 3 (step of hydrolyzing compound (1a) to synthesize compound (1), decarboxylating the carboxy group from compound (1) to compound
- the step of synthesizing (2) and the step of producing compound (3) from compound (2)) yield good yields.
- the overall yield of the two steps or three steps is preferably 35 mol % or more, more preferably 50 mol % or more, still more preferably 70 mol % or more.
- the progress of the reaction was confirmed by the HPLC method, and the molar conversion rate and reaction yield were determined.
- the molar conversion ratio means the ratio of the amount of substance of the target product to the total amount of substances of the reaction substrate and the target product contained in the reaction solution.
- the HPLC analysis conditions are as follows.
- Example 1 Production of 5-bromo-2-methylpyrimidine Under a nitrogen atmosphere, diethyl 2-(5-bromopyrimidin-2-yl)malonate synthesized in Reference Example 1 (69.5 g, purity 56%, 0 .12 mol), ethanol (82.3 g) and 30% aqueous sodium hydroxide solution (82.3 g) were added, the temperature was adjusted to 55 to 59° C., and the mixture was stirred for 1 hour. After confirming the progress of the reaction by HPLC, it was cooled to 25°C. A 1 M aqueous citric acid solution (389.5 g) was added over 1.5 hours to adjust the pH to 4. The temperature was adjusted to 68 to 76°C and stirred for 20 hours.
- the mixture was cooled to 25°C. After adding toluene (200 g), liquid separation was performed to separate an organic layer and an aqueous layer. Toluene (200 g) was added to the aqueous layer for liquid separation, and the aqueous layer was removed. The organic layer obtained by liquid separation of the 1st time and the organic layer obtained by liquid separation of the 2nd time were mixed, saturated salt solution (80g) was added and liquid-separated, and the water layer was removed. By concentrating the organic layer, 156.7 g of 5-bromo-2-methylpyrimidine was obtained. The HPLC area percentage of the concentrate excluding solvent was 95%.
- Example 2 Preparation of (2-methylpyrimidin-5-yl)boronic acid
- 5-bromo-2-methylpyrimidine (155.5 g, 0.90 mol) prepared in Example 1 and triisopropoxy were treated.
- Borane (35.9g, 0.19mol) and THF (225ml) were mixed and cooled to -71°C.
- a n-butyllithium/hexane solution (1.6 M, 115.4 ml, 0.18 mol) was added over 1.5 hours. After stirring at -71°C for 1 hour and confirming the progress of the reaction by HPLC, the temperature was raised to 0°C.
- Example 3 Preparation of 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine. Prepared 5-bromo-2-methylpyrimidine (0.499 g, 2.89 mmol), bis(pinacolato)diboron (0.808 g, 1.1 eq), potassium acetate (0.567 g, 2.0 eq), PdCl 2 (dppf) 2 (94.7 mg, 0.04 equivalent) and dioxane (5.00 g) were added and reacted at 85° C. for 5 hours.
- reaction solution was filtered and then concentrated to obtain 1.1 g of 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidine (2 81 mol % overall yield from diethyl-(5-bromopyrimidin-2-yl)malonate, 47% purity).
- Example 4 Preparation of (2-methylpyrimidin-5-yl)boronic acid Under a nitrogen atmosphere, 2.5M n-butyllithium/hexane solution (500ml) and toluene (500ml) were placed in a 1L medium bottle. They were mixed well to obtain a uniform solution (raw material solution B). Next, put 5-bromo-2-methylpyrimidine (110 g, 0.64 mol), triisopropoxyborane (179 g, 0.95 mol), and tetrahydrofuran (1540 g) into a 2 L medium bottle and mix well to form a uniform solution.
- 5-bromo-2-methylpyrimidine 110 g, 0.64 mol
- triisopropoxyborane 179 g, 0.95 mol
- tetrahydrofuran 1540 g
- reaction solution was collected in the reaction solution storage container 11 in an ice bath for 60 minutes.
- 20 wt % NH 4 Cl water (1.76 kg) was added to the recovered reaction solution (2.271 kg) at a rate that could keep the internal temperature below 5° C., stirred at the same temperature for 10 minutes, and allowed to stand.
- the aqueous layer was collected, adjusted to pH 4 using aqueous hydrochloric acid, and stirred at -2°C for 15 hours.
- Example 5 Production of (2-methylpyrimidin-5-yl)boronic acid
- Raw material liquid A preparation example: 5-bromo-2-methylpyrimidine (100 g, 0.58 mol), triisopropoxyborane (164 g, 0.58 mol) 87 mol) and tetrahydrofuran (1736 g) were added and mixed well to form a homogeneous solution (5-bromo-2-methylpyrimidine: 0.245 M, triisopropoxyborane: 0.368 M).
- Raw material liquid B preparation example A 2.72M n-butyllithium/hexane solution (500ml) and toluene (500ml) were added and well mixed to form a uniform solution (n-butyllithium: 1.36M). The following reactions were carried out using the flow reactor 12 shown in FIG. Toluene and THF were sent into the flow channel in the flow reactor using diaphragm pumps (liquid sending devices 3 and 4), and after the moisture in the flow channel was completely distilled off, a chiller (temperature control device 9) was used. was set to -45°C.
- the raw material liquid B was fed at a rate of 0.36 ml/min and the raw material liquid A at a rate of 2.00 ml/min to start the flow reaction (residence time: 1.4 ms), and after the internal temperature was stabilized, , (2-methylpyrimidin-5-yl)boronic acid was collected in a reaction liquid storage container 11 in an ice bath (molar conversion: 49%, reaction yield: 47%).
- Example 6 Production of (2-methylpyrimidin-5-yl)boronic acid
- the residence time was adjusted by changing the flow rate as follows. Pyrimidin-5-yl)boronic acid was prepared.
- n-BuLi (eq) indicates the equivalent of n-BuLi to 5-bromo-2-methylpyrimidine in the mixing/reaction section 7.
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Abstract
Description
即ち、本発明は、下記[1]~[8]に関する。
[1] 下記式(1);
(式中、R1は水素原子、又はCO2Hを表す。)で表される5-ブロモピリミジン誘導体からカルボキシ基を脱炭酸させることにより、下記式(2);
で表される5-ブロモ-2-メチルピリミジンを合成する工程を含む、下記式(3);
(式中、R2、R3は互いに独立して、水素原子、又は置換基を有してもよい炭素数1~6のアルキル基を表す。またR2及びR3が一緒になって環を形成してもよい。)で表される(2-メチルピリミジン-5-イル)ボロン酸誘導体の製造方法。
[2] 前記脱炭酸させる工程を150℃以下の温度下で行う、[1]に記載の製造方法。
[3] 前記脱炭酸させる工程を炭素数1~5のアルコール、及び水からなる群から選ばれる少なくとも1種の溶媒中で行う、[1]または[2]に記載の製造方法。
[4] フロー式リアクターにおいて、前記5-ブロモ-2-メチルピリミジン、トリアルコキシホウ素化合物、および有機リチウム試薬を接触させて、前記(2-メチルピリミジン-5-イル)ボロン酸誘導体を製造する工程を含む、[1]~[3]のいずれかに記載の製造方法。
[5] 前記5-ブロモ-2-メチルピリミジン、前記トリアルコキシホウ素化合物、および前記有機リチウム試薬を-50℃以上の温度下で接触させる、[4]に記載の製造方法。
[6] 前記5-ブロモ-2-メチルピリミジンと前記トリアルコキシホウ素化合物を含む溶液と、前記有機リチウム試薬とを接触させる、[4]または[5]に記載の製造方法。
[7] 前記トリアルコキシホウ素化合物がトリイソプロポキシボランである、[4]~[6]のいずれかに記載の製造方法。
[8] 前記有機リチウム試薬がn-ブチルリチウムである、[4]~[7]のいずれかに記載の製造方法。
(式中、R2、R3は互いに独立して、水素原子、又は置換基を有してもよい炭素数1~6のアルキル基を表す。またR2及びR3が一緒になって環を形成してもよい。)で表される。
前記溶媒の使用量としては、多すぎるとコストや後処理の点で好ましくないため、上限としては、前記化合物(1a)に対して好ましくは50倍重量以下であり、更に好ましくは20倍重量以下である。また前記溶媒の使用量の下限としては、前記化合物(1a)に対して例えば1倍重量以上である。
前記酸としては、塩酸、硫酸、リン酸などの無機酸;メタンスルホン酸などのスルホン酸、酢酸、クエン酸などのカルボン酸などの有機酸;が挙げられる。前記酸としては、1種を単独で用いてもよいし、2種以上を併用してもよい。
前記加水分解反応では、化合物(1a)1モルに対して、1~10モルの酸または塩基が用いられることが好ましい。
前記加水分解反応を塩基の存在下で行う場合、加水分解反応の終了後、加水分解物(塩)を必要に応じて単離または精製してもよいが、単離及び精製をすることなく加水分解物(塩)を反応混合物のまま処理して化合物(1)を合成してもよい。具体的には反応混合物に酸を加えることで、化合物(1)を合成することができる。以下、反応混合物に酸を加えて得られた溶液を「化合物(1)含有酸性溶液」という場合がある。
前記酸としては、塩酸、硫酸、リン酸などの無機酸;メタンスルホン酸などのスルホン酸、酢酸、クエン酸などのカルボン酸などの有機酸;が挙げられる。前記酸としては、1種を単独で用いてもよいし、2種以上を併用してもよい。
酸の使用量としては、化合物(1)含有酸性溶液のpHが2~5となる量が好ましい。
このようにして得られた化合物(1)は、後続工程に使用できる十分な純度を有しているが、後続工程の収率、もしくは後続工程で得られる化合物の純度を更に高める目的で分別蒸留やカラムクロマトグラフィー、活性炭処理等の一般的な精製手法により、更に純度を高めてもよい。
方法a:5-ブロモ-2-クロロピリミジンとマロン酸アルキルエステル(例えばマロン酸tert-ブチル、マロン酸メチル等)とを、水素化ナトリウム共存下に反応させて2-(5-ブロモピリミジン-2-イル)マロン酸アルキルエステル(例えば2-(5-ブロモピリミジン-2-イル)マロン酸tert-ブチル、2-(5-ブロモピリミジン-2-イル)マロン酸メチル等)を製造し、続いて酸加水分解することにより2-(5-ブロモピリミジン-2-イル)酢酸アルキルエステル(式(1a)において、R1aが水素原子である化合物;例えば、2-(5-ブロモピリミジン-2-イル)酢酸メチル等)を製造する方法。
方法b:5-ブロモ-2-クロロピリミジンとマロン酸ジアルキルエステル(例えばマロン酸ジエチル等)を水素化ナトリウム共存下に反応させることにより2-(5-ブロモピリミジン-2-イル)マロン酸ジアルキルエステル(式(1a)において、R1aが-COOR4aである化合物;例えば2-(5-ブロモピリミジン-2-イル)マロン酸ジエチル等)を製造する方法。
このようにして得られた化合物(2)は、後続工程に使用できる十分な純度を有しているが、後続工程の収率、もしくは後続工程で得られる化合物の純度を更に高める目的で分別蒸留やカラムクロマトグラフィー、活性炭処理等の一般的な精製手法により、更に純度を高めてもよい。
方法dにおいて、反応時間は、特に限定されないが、例えば30分~24時間であり、好ましくは1時間~12時間である。
移動相:リン酸水バッファー(pH=2.5)/アセトニトリル = 7/3(v/v)
流速:1.0ml/分
検出波長:UV254nm
カラム温度:40℃
窒素雰囲気下、フラスコに水素化ナトリウム(純度65%、14.0g、0.39mol)、テトラヒドロフラン(THF)(270g)を加えて、1℃に冷却した。この中にマロン酸ジエチル(37.3g、0.23mol)のテトラヒドロフラン(30g)溶液を35分かけて加えた。20分撹拌した後に、2-クロロ-5-ブロモピリミジン(30g、0.16mol)のテトラヒドロフラン(300g)溶液を30分かけて添加した。20分撹拌後、加熱を開始して65℃に温調し、19時間撹拌した。HPLCで反応の進行を確認した後に、25℃に冷却し、トルエン(300g)、飽和塩化アンモニウム水溶液(596g)を加えた。次に30%水酸化ナトリウム水溶液(54g)を加えてpHを9に調整した。分液して水層を除去し、得られた有機層を濃縮することにより、2-(5-ブロモピリミジン-2-イル)マロン酸ジエチルを69.5g得た(純度56%、収率79モル%)。
窒素雰囲気下、参考例1で合成した2-(5-ブロモピリミジン-2-イル)マロン酸ジエチル(69.5g、純度56%、0.12mol)にエタノール(82.3g)、30%水酸化ナトリウム水溶液(82.3g)を加えて、55~59℃に温調して、1時間撹拌した。HPLCで反応の進行を確認した後に、25℃に冷却した。1Mクエン酸水溶液(389.5g)を1.5時間かけて加え、pHを4に調整した。68~76℃に温調して20時間撹拌し、HPLCで反応の進行を確認した後に25℃に冷却した。トルエン(200g)を加えた後に、分液して有機層と水層を分離した。この水層にトルエン(200g)を加えて分液し、水層を除去した。1回目の分液で得られた有機層と、2回目の分液で得られた有機層とを混合して、飽和食塩水(80g)を加えて分液し、水層を除去した。有機層を濃縮することにより、5-ブロモ-2-メチルピリミジンを156.7g得た。濃縮物の溶媒を除くHPLC面積百分率は95%であった。
窒素雰囲気下、実施例1で製造した5-ブロモ-2-メチルピリミジン(155.5g、0.90mol)とトリイソプロポキシボラン(35.9g、0.19mol)とTHF(225ml)を混合して-71℃に冷却した。n-ブチルリチウム/ヘキサン溶液(1.6M、115.4ml、0.18mol)を1.5時間かけて加えた。-71℃で1時間撹拌し、HPLCで反応の進行を確認した後に、0℃に昇温した。20%塩化アンモニウム水溶液(351.3g)を1時間かけて加え、pHを8.8に調整した。分液して有機層を除去し、水層を0℃に冷却した。水層に濃塩酸(19g)を加えて、pH4.0に調整し、4時間撹拌した後に、結晶を濾過した。結晶ケーキを冷水(84g)で洗浄した後に、減圧下、40℃で23時間乾燥し、(2-メチルピリミジン-5-イル)ボロン酸を白色結晶として取得した(12.2g、純度99%、2-(5-ブロモピリミジン-2-イル)マロン酸ジエチルからの通算収率69モル%)。
窒素雰囲気下、試験管に実施例1で製造した5-ブロモ-2-メチルピリミジン(0.499g、2.89mmol)、ビス(ピナコラト)ジボロン(0.808g、1.1当量)、酢酸カリウム(0.567g、2.0当量)、PdCl2(dppf)2(94.7 mg、0.04当量)、およびジオキサン(5.00g)を加え85℃で5時間反応した。反応液を濾過した後、濃縮することにより2-メチル-5-(4,4,5,5-テトラメチル-1,3,2-ジオキサボロラン-2-イル)ピリミジンを1.1g得た(2-(5-ブロモピリミジン-2-イル)マロン酸ジエチルからの通算収率81モル%、純度47%)。
窒素雰囲気下、1Lのメディウム瓶に2.5Mのn-ブチルリチウム/ヘキサン溶液(500ml)とトルエン(500ml)を入れてよく混合し、均一溶液とした(原料液B)。次に、2Lのメディウム瓶に5-ブロモ‐2-メチルピリミジン(110g、0.64mol)、トリイソプロポキシボラン(179g、0.95mol)、及びテトラヒドロフラン(1540g)を入れてよく混合し、均一溶液とした(原料液A;5-ブロモ‐2-メチルピリミジン:0.31M、トリイソプロポキシボラン:0.31M)。
図1に示すフロー式リアクター12を用いて以下の反応を行った。ダイヤフラムポンプ(送液装置3及び4)を用いてフロー式リアクター内の流路内にトルエンとTHFを送液し、流路内の水分を完全に留去した後、チラー(温度調節装置9)のジャケット温度を-40℃に設定した。次に、原料液Bを11.9ml/分、原料液Aを32.2ml/分の速度で送液してフロー反応を開始し(滞留時間:0.2ミリ秒)、内温が安定後、反応液をアイスバス中の反応液貯蔵容器11に60分間回収した。
回収した反応液(2.271kg)中に20wt%のNH4Cl水(1.76kg)を内温5℃以下を保持できる速度で添加し、同温度で10分間撹拌後、静置した。2層分離した後、水層を回収し、塩酸水を用いてpHを4に調製し、-2℃にて15時間撹拌した。次に析出した結晶を濾過し、湿ケーキを50mlの冷水にて2回洗浄後、減圧下、40℃で乾燥し、(2-メチルピリミジン-5-イル)ボロン酸を白色結晶として取得した(66.2g、純度99.8%、収率80モル%)。
原料液A調製例:5-ブロモ-2-メチルピリミジン(100g、0.58mol)、トリイソプロポキシボラン(164g、0.87mol)、及びテトラヒドロフラン(1736g)を入れてよく混合し、均一溶液とした(5-ブロモ‐2-メチルピリミジン:0.245M、トリイソプロポキシボラン:0.368M)。
原料液B調製例:2.72Mのn-ブチルリチウム/ヘキサン溶液(500ml)とトルエン(500ml)を入れてよく混合し、均一溶液とした(n-ブチルリチウム:1.36M)。
図1に示すフロー式リアクター12を用いて以下の反応を行った。ダイヤフラムポンプ(送液装置3及び4)を用いてフロー式リアクター内の流路内にトルエンとTHFを送液し、流路内の水分を完全に留去した後、チラー(温度調節装置9)のジャケット温度を-45℃に設定した。次に、原料液Bを0.36ml/分、原料液Aを2.00ml/分の速度で送液してフロー反応を開始し(滞留時間:1.4ミリ秒)、内温が安定後、(2-メチルピリミジン-5-イル)ボロン酸を含む反応液をアイスバス中の反応液貯蔵容器11に回収した(モル変換率:49%、反応収率:47%)。
流速を下記の様に変更することで滞留時間を調整した以外は実施例5と同様の方法で(2-メチルピリミジン-5-イル)ボロン酸を製造した。なお表1及び後述の表2中、「n-BuLi(eq)」は、混合・反応部7における、5-ブロモ-2-メチルピリミジンに対する、n-BuLiの当量を示す。
3,4 :送液装置
7 :混合・反応部
8 :温度センサー
9 :温度調節装置
10 :反応液排出流路
11 :反応液貯蔵容器
12 :フロー式リアクター
Claims (8)
- 前記脱炭酸させる工程を150℃以下の温度下で行う、請求項1に記載の製造方法。
- 前記脱炭酸させる工程を炭素数1~5のアルコール、及び水からなる群から選ばれる少なくとも1種の溶媒中で行う、請求項1または2に記載の製造方法。
- フロー式リアクターにおいて、前記5-ブロモ-2-メチルピリミジン、トリアルコキシホウ素化合物、および有機リチウム試薬を接触させて、前記(2-メチルピリミジン-5-イル)ボロン酸誘導体を製造する工程を含む、請求項1~3のいずれかに記載の製造方法。
- 前記5-ブロモ-2-メチルピリミジン、前記トリアルコキシホウ素化合物、および前記有機リチウム試薬を-50℃以上の温度下で接触させる、請求項4に記載の製造方法。
- 前記5-ブロモ-2-メチルピリミジンと前記トリアルコキシホウ素化合物を含む溶液と、前記有機リチウム試薬とを接触させる、請求項4または5に記載の製造方法。
- 前記トリアルコキシホウ素化合物がトリイソプロポキシボランである、請求項4~6のいずれかに記載の製造方法。
- 前記有機リチウム試薬がn-ブチルリチウムである、請求項4~7のいずれかに記載の製造方法。
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