JP6425543B2 - ボロン酸およびその中間体を生成させるための方法およびシステム - Google Patents
ボロン酸およびその中間体を生成させるための方法およびシステム Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 26
- 239000000543 intermediate Substances 0.000 title description 37
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 title description 10
- -1 boric acid ester Chemical class 0.000 claims description 56
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 44
- 239000011541 reaction mixture Substances 0.000 claims description 32
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 12
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 claims description 11
- SETXOKRQBMYRMQ-UHFFFAOYSA-N [Li]C1=CC=C(Cl)C(OC)=C1F Chemical compound [Li]C1=CC=C(Cl)C(OC)=C1F SETXOKRQBMYRMQ-UHFFFAOYSA-N 0.000 claims description 9
- 150000002148 esters Chemical class 0.000 claims description 9
- GDJCQSNQOHRAGY-UHFFFAOYSA-N (4-chloro-2-fluoro-3-methoxyphenyl)boronic acid Chemical compound COC1=C(Cl)C=CC(B(O)O)=C1F GDJCQSNQOHRAGY-UHFFFAOYSA-N 0.000 claims description 8
- QASFEHCRPLPGES-UHFFFAOYSA-N 1-chloro-3-fluoro-2-methoxybenzene Chemical compound COC1=C(F)C=CC=C1Cl QASFEHCRPLPGES-UHFFFAOYSA-N 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 230000020477 pH reduction Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 3
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 claims description 3
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 claims description 3
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 claims description 2
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 claims description 2
- 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 2
- NLLGFYPSWCMUIV-UHFFFAOYSA-N (3-methoxyphenyl)boronic acid Chemical compound COC1=CC=CC(B(O)O)=C1 NLLGFYPSWCMUIV-UHFFFAOYSA-N 0.000 claims 2
- 238000009751 slip forming Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 70
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 43
- 238000006243 chemical reaction Methods 0.000 description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 15
- 238000002156 mixing Methods 0.000 description 15
- 239000003153 chemical reaction reagent Substances 0.000 description 12
- 238000000354 decomposition reaction Methods 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical group [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 238000011065 in-situ storage Methods 0.000 description 7
- 239000000523 sample Substances 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 235000011089 carbon dioxide Nutrition 0.000 description 6
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 5
- 125000005620 boronic acid group Chemical class 0.000 description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 238000004566 IR spectroscopy Methods 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 3
- 239000012527 feed solution Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000001642 boronic acid derivatives Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000007857 degradation product Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004009 herbicide Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- MLSKXPOBNQFGHW-UHFFFAOYSA-N methoxy(dioxido)borane Chemical group COB([O-])[O-] MLSKXPOBNQFGHW-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000012048 reactive intermediate Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- HMILUKNKHFQNQP-UHFFFAOYSA-N 1-chloro-4-(3-chloro-2-methoxyphenyl)-3-fluoro-2-methoxybenzene Chemical group C1=C(Cl)C(OC)=C(F)C(C=2C(=C(Cl)C=CC=2)OC)=C1 HMILUKNKHFQNQP-UHFFFAOYSA-N 0.000 description 1
- KLYCPFXDDDMZNQ-UHFFFAOYSA-N Benzyne Chemical compound C1=CC#CC=C1 KLYCPFXDDDMZNQ-UHFFFAOYSA-N 0.000 description 1
- 238000003109 Karl Fischer titration Methods 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008901 benefit Effects 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
- 230000006652 catabolic pathway Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000005595 deprotonation Effects 0.000 description 1
- 238000010537 deprotonation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002243 precursor Substances 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
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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- 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
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- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0046—Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays
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- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0093—Microreactors, e.g. miniaturised or microfabricated reactors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
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- 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
- C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
- C07F1/02—Lithium compounds
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00099—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor the reactor being immersed in the heat exchange medium
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
- B01J2219/00583—Features relative to the processes being carried out
- B01J2219/0059—Sequential processes
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- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00788—Three-dimensional assemblies, i.e. the reactor comprising a form other than a stack of plates
- B01J2219/00792—One or more tube-shaped elements
- B01J2219/00795—Spiral-shaped
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2219/00801—Means to assemble
- B01J2219/0081—Plurality of modules
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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- B01J2219/00851—Additional features
- B01J2219/00867—Microreactors placed in series, on the same or on different supports
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J2219/00891—Feeding or evacuation
- B01J2219/00894—More than two inlets
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- Engineering & Computer Science (AREA)
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Description
本出願は、その開示が参照により全体として本明細書に組み込まれる、2011年9月14日に出願した米国仮特許出願第61/534,768号の利益を主張する。
Li−2,6−CFAの新たに調製した溶液を示差走査熱量計(DSC)によって検討した。試料調製の間、各々の反応物を−78℃以下の温度に保った。次いで試料をDSC中でゆっくりと加熱し、プロセス中に放出される熱をモニタリングした。
図1に示すシステム100を、内容積約25mlの第1の反応器102、内容積約3mlの移送チューブ106および内容積約30mlの第2の反応器104から構成した。
図4に示すシステム200を、予備冷却ゾーン202(1/8インチステンレススチールチューブからなる)、第1混合ゾーン203(1/4インチクロスフィッティングおよびそれに続くインラインのプラスチック製スタティックミキサーからなる)、第1反応ゾーン204(1/8インチステンレススチールチューブからなる)、第2混合ゾーン205(1/8インチクロスフィッティングおよびそれに続くインラインのプラスチック製スタティックミキサーからなる)、および第2反応ゾーン206(1/8インチステンレススチールチューブからなる)から構成し、全てをドライアイス/ヘキサン浴201に浸漬した。混合ゾーン203および205におけるインラインのプラスチック製スタティックミキサーは2.25インチ×3/16インチの寸法を有しており、反応溶液を強制的に混合し、それ自体の上に折り重ねるように、これらを各々のセグメントに取り付けた。試薬の逆流を防ぐため、試薬供給ライン220(1/8インチステンレススチールチューブからなる)、221(1/4インチテフロン(登録商標)チューブからなる)、および222(1/8インチステンレススチールチューブからなる)にはチェックバルブを取り付けた。
冷却浴中の250mL丸底フラスコ
インサイチュのIR分光法によってその熱分解のモニタリングを可能にするため、Li−2,6−CFA化学種を発生させた。250mLのガラス製丸底フラスコにDMEを装入した。2−プロパノールを満たした冷却浴の中にフラスコを降下させ、低温フィンガーで約−60℃まで冷却した。撹拌を開始した。フラスコの深さを調節して溶液の温度を約−50℃に制御した。フラスコの頸部にあるポートを通して反応溶液中にインサイチュIR分光器のプローブを挿入し、データ収集を開始した。約−50℃におけるDMEのバックグラウンドシグナルを得た。
冷却浴および丸底フラスコによって得られる温度制御は正確でなく、各々のホールドポイントにおいて数℃の変動が生じた。−30℃を超える温度でより良い精度を得るため、正確な温度制御および熱流量の変化に対する迅速かつ自動化された応答を可能にする固体冷却デバイスで囲まれた150mLのガラス製の直壁反応器中でインサイチュIRによる検討を行った。デバイスの低温限界は−40℃であった。
102 第1の反応器
104 第2の反応器
106 移送チューブ
108 浴
110 第1のポンプ
112 第2のポンプ
114 第3のポンプ
116A ヘッドポート
116B ヘッドポート
118 第1の供給ライン
120 第2の供給ライン
122 第3の供給ライン
124 フラスコ
126 出口チューブ
128 マルチゾーン撹拌プレート
200 システム
201 ドライアイス/ヘキサン浴
202 予備冷却ゾーン
203 第1混合ゾーン
204 第1反応ゾーン
205 第2混合ゾーン
206 第2反応ゾーン
210 ポンプ
211 ポンプ
212 ポンプ
214 受け入れジャー
220 試薬供給ライン
221 試薬供給ライン
222 試薬供給ライン
223 排出ライン
Claims (9)
- 第1の溶液と第2の溶液を第1の反応器に供給するステップであって、前記第1の溶液は2−クロロ−6−フルオロアニソールおよび少なくとも1種の溶媒のみからなり、前記第2の溶液は少なくとも1種のアルキルリチウムおよび少なくとも1種の溶媒のみからなるステップ(ステップ1)と、
前記2−クロロ−6−フルオロアニソールを少なくとも1種のアルキルリチウムと第1の反応器中で反応させて6−クロロ−2−フルオロ−3−リチオアニソール中間体を含む反応混合物を生成させるステップ(ステップ2)と;前記第1の反応器が前記反応混合物で満たされるにつれて、前記第1および第2の反応器を連通する移送チューブを経由して前記反応混合物を前記第1の反応器から第2の反応器に移送するステップ(ステップ3)と、
前記第2の反応器中で前記反応混合物にホウ酸エステルを連続的に添加して4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを生成させるステップ(ステップ4)と、
前記4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸に転化するステップ(ステップ5)と
を含む、4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸を生成させる方法であって、前記ステップ2、3および4を−60℃以下に温度を維持しながら実行し、前記第1および第2の反応器は、連続撹拌タンク反応器である、方法。 - 前記少なくとも1種のアルキルリチウムがブチルリチウム、メチルリチウム、およびプロピルリチウムの少なくとも1種を含む、請求項1に記載の方法。
- 前記少なくとも1種のアルキルリチウムが、n−ブチルリチウム、t−ブチルリチウム、およびsec−ブチルリチウムの少なくとも1種を含む、請求項1に記載の方法。
- 前記ホウ酸エステルが、ホウ酸トリメチルを含む、請求項1に記載の方法。
- 前記4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを前記4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸に転化するステップが、
前記4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを水性水酸化カリウムに曝露するステップと、
酸性化プロセスを実施するステップと
を含む、請求項1に記載の方法。 - 第1の溶液と第2の溶液を第1の反応器に供給するステップであって、前記第1の溶液は2−クロロ−6−フルオロアニソールおよび少なくとも1種の溶媒のみからなり、前記第2の溶液は少なくとも1種のアルキルリチウムおよび少なくとも1種の溶媒のみからなるステップ(ステップ1)と、
前記2−クロロ−6−フルオロアニソールを前記第1の反応器中で前記少なくとも1種のアルキルリチウムと反応させることによって6−クロロ−2−フルオロ−3−リチオアニソール中間体を連続的に生成させ前記6−クロロ−2−フルオロ−3−リチオアニソール中間体を含む反応混合物を生成するステップ(ステップ2)と;前記第1の反応器が前記反応混合物で満たされるにつれて、前記第1および第2の反応器を連通する移送チューブを経由して前記第1の反応器から第2の反応器に前記反応混合物を連続的に移送するステップ(ステップ3)と、
前記6−クロロ−2−フルオロ−3−リチオアニソール中間体を前記第2の反応器中でホウ酸エステルと反応させて4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを生成させるステップ(ステップ4)と、
前記4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸に転化するステップ(ステップ5)と
を含む、4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸を生成させる方法であって、前記ステップ2、3および4を−60℃以下に温度を維持しながら実行し、前記第1および第2の反応器は、1/8インチのステンレススチールのチューブ製のチューブ型反応器である、方法。
。 - 前記少なくとも1種のアルキルリチウムが、ブチルリチウム、メチルリチウム、およびプロピルリチウムの少なくとも1種を含む、請求項6に記載の方法。
- 前記6−クロロ−2−フルオロ−3−リチオアニソール中間体を前記第2の反応器中でホウ酸エステルと反応させて4−クロロ−2−フルオロ−3−メトキシフェニルボロン酸エステルを生成させるステップが、前記第2の反応器中で前記6−クロロ−2−フルオロ−3−リチオアニソール中間体を含む前記反応混合物に前記ホウ酸エステルを添加するステップを含む、請求項6に記載の方法。
- 前記ホウ酸エステルが、ホウ酸トリメチルおよびホウ酸トリイソプロピルの少なくとも1種を含む、請求項6に記載の方法。
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