JP5595404B2 - 光学活性(s)−(−)−2−(n−プロピルアミノ)−5−メトキシテトラリン及び(s)−(−)−2−(n−プロピルアミノ)−5−ヒドロキシテトラリン化合物の調製の方法 - Google Patents
光学活性(s)−(−)−2−(n−プロピルアミノ)−5−メトキシテトラリン及び(s)−(−)−2−(n−プロピルアミノ)−5−ヒドロキシテトラリン化合物の調製の方法 Download PDFInfo
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- propylamino
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- methoxytetralin
- optically active
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- 238000002360 preparation method Methods 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 20
- ICJPCRXVYMMSJY-LBPRGKRZSA-N (2s)-5-methoxy-n-propyl-1,2,3,4-tetrahydronaphthalen-2-amine Chemical compound C1=CC=C(OC)C2=C1C[C@@H](NCCC)CC2 ICJPCRXVYMMSJY-LBPRGKRZSA-N 0.000 title claims description 9
- VCYPZWCFSAHTQT-NSHDSACASA-N (6s)-6-(propylamino)-5,6,7,8-tetrahydronaphthalen-1-ol Chemical class C1=CC=C2C[C@@H](NCCC)CCC2=C1O VCYPZWCFSAHTQT-NSHDSACASA-N 0.000 title claims description 6
- 150000003839 salts Chemical class 0.000 claims description 29
- 230000003287 optical effect Effects 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 18
- MIVUDAUOXJDARR-UHFFFAOYSA-N 2-[(3,5-dinitrobenzoyl)amino]-2-phenylacetic acid Chemical compound C=1C=CC=CC=1C(C(=O)O)NC(=O)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1 MIVUDAUOXJDARR-UHFFFAOYSA-N 0.000 claims description 11
- KFQYTPMOWPVWEJ-INIZCTEOSA-N rotigotine Chemical compound CCCN([C@@H]1CC2=CC=CC(O)=C2CC1)CCC1=CC=CS1 KFQYTPMOWPVWEJ-INIZCTEOSA-N 0.000 claims description 9
- 229960003179 rotigotine Drugs 0.000 claims description 9
- OQDYWUDOCVRCBH-LYKKTTPLSA-N (6s)-6-(2-thiophen-2-ylpentylamino)-5,6,7,8-tetrahydronaphthalen-1-ol Chemical compound N([C@@H]1CC2=CC=CC(O)=C2CC1)CC(CCC)C1=CC=CS1 OQDYWUDOCVRCBH-LYKKTTPLSA-N 0.000 claims description 6
- -1 (S)-(-)-2- (N-propylamino) -5-hydroxytetralin compound Chemical class 0.000 claims description 6
- 239000000203 mixture Substances 0.000 description 29
- 239000007787 solid Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 11
- 239000012044 organic layer Substances 0.000 description 11
- 239000000543 intermediate Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 10
- 239000002904 solvent Substances 0.000 description 8
- HBAQYPYDRFILMT-UHFFFAOYSA-N 8-[3-(1-cyclopropylpyrazol-4-yl)-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-3-methyl-3,8-diazabicyclo[3.2.1]octan-2-one Chemical class C1(CC1)N1N=CC(=C1)C1=NNC2=C1N=C(N=C2)N1C2C(N(CC1CC2)C)=O HBAQYPYDRFILMT-UHFFFAOYSA-N 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- PBCJIPOGFJYBJE-UHFFFAOYSA-N acetonitrile;hydrate Chemical compound O.CC#N PBCJIPOGFJYBJE-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- QPKNFEVLZVJGBM-UHFFFAOYSA-N 2-aminonaphthalen-1-ol Chemical compound C1=CC=CC2=C(O)C(N)=CC=C21 QPKNFEVLZVJGBM-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 3
- VMJOFTHFJMLIKL-UHFFFAOYSA-N 2-thiophen-2-ylethanol Chemical compound OCCC1=CC=CS1 VMJOFTHFJMLIKL-UHFFFAOYSA-N 0.000 description 2
- HWTDMFJYBAURQR-UHFFFAOYSA-N 80-82-0 Chemical compound OS(=O)(=O)C1=CC=CC=C1[N+]([O-])=O HWTDMFJYBAURQR-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011260 aqueous acid Substances 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000004296 chiral HPLC Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 229960003638 dopamine Drugs 0.000 description 2
- 239000012458 free base Substances 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- 239000012429 reaction media Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000006268 reductive amination reaction Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- OZFLGQHJVWSALN-INIZCTEOSA-N (2s)-n-benzyl-5-methoxy-1,2,3,4-tetrahydronaphthalen-2-amine Chemical compound N([C@@H]1CC=2C=CC=C(C=2CC1)OC)CC1=CC=CC=C1 OZFLGQHJVWSALN-INIZCTEOSA-N 0.000 description 1
- HUWWFOPCZSIFKK-MERQFXBCSA-N (6s)-6-(propylamino)-5,6,7,8-tetrahydronaphthalen-1-ol;hydrobromide Chemical compound Br.C1=CC=C2C[C@@H](NCCC)CCC2=C1O HUWWFOPCZSIFKK-MERQFXBCSA-N 0.000 description 1
- IWYDHOAUDWTVEP-SSDOTTSWSA-N (R)-mandelic acid Chemical compound OC(=O)[C@H](O)C1=CC=CC=C1 IWYDHOAUDWTVEP-SSDOTTSWSA-N 0.000 description 1
- BYFWVPFMYMNZMK-UHFFFAOYSA-N 2-amino-3-(2-thiophen-2-ylpentyl)naphthalen-1-ol Chemical compound C(CC)C(CC=1C(=C(C2=CC=CC=C2C1)O)N)C=1SC=CC1 BYFWVPFMYMNZMK-UHFFFAOYSA-N 0.000 description 1
- 125000004182 2-chlorophenyl group Chemical group [H]C1=C([H])C(Cl)=C(*)C([H])=C1[H] 0.000 description 1
- 125000000175 2-thienyl group Chemical group S1C([*])=C([H])C([H])=C1[H] 0.000 description 1
- SPXOTSHWBDUUMT-UHFFFAOYSA-M 4-nitrobenzenesulfonate Chemical compound [O-][N+](=O)C1=CC=C(S([O-])(=O)=O)C=C1 SPXOTSHWBDUUMT-UHFFFAOYSA-M 0.000 description 1
- SCWNNOCLLOHZIG-UHFFFAOYSA-N 5,6,7,8-tetrahydro-1-naphthol Chemical compound C1CCCC2=C1C=CC=C2O SCWNNOCLLOHZIG-UHFFFAOYSA-N 0.000 description 1
- OXXFHUMKHSSUNG-UHFFFAOYSA-N 5-methoxy-1,2,3,4-tetrahydronaphthalene Chemical compound C1CCCC2=C1C=CC=C2OC OXXFHUMKHSSUNG-UHFFFAOYSA-N 0.000 description 1
- MDAIAXRTLTVEOU-UHFFFAOYSA-N 5-methoxy-3,4-dihydro-1h-naphthalen-2-one Chemical compound C1C(=O)CCC2=C1C=CC=C2OC MDAIAXRTLTVEOU-UHFFFAOYSA-N 0.000 description 1
- BRCPWISABURVIH-UHFFFAOYSA-N 5-methoxy-3,4-dihydro-2h-naphthalen-1-one Chemical compound O=C1CCCC2=C1C=CC=C2OC BRCPWISABURVIH-UHFFFAOYSA-N 0.000 description 1
- ICJPCRXVYMMSJY-UHFFFAOYSA-N 5-methoxy-n-propyl-1,2,3,4-tetrahydronaphthalen-2-amine Chemical compound C1=CC=C(OC)C2=C1CC(NCCC)CC2 ICJPCRXVYMMSJY-UHFFFAOYSA-N 0.000 description 1
- YVLIMSOQPVIRDC-LMOVPXPDSA-N Br.CCCN(CCc1cccs1)[C@H]1CCc2c(C1)cccc2OC Chemical compound Br.CCCN(CCc1cccs1)[C@H]1CCc2c(C1)cccc2OC YVLIMSOQPVIRDC-LMOVPXPDSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 0 CCCNC(CC1)Cc2c1c(O*)ccc2 Chemical compound CCCNC(CC1)Cc2c1c(O*)ccc2 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 1
- VCYPZWCFSAHTQT-UHFFFAOYSA-N N-Desthienylethyl-rotigotine Chemical compound C1=CC=C2CC(NCCC)CCC2=C1O VCYPZWCFSAHTQT-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 208000018737 Parkinson disease Diseases 0.000 description 1
- IWYDHOAUDWTVEP-UHFFFAOYSA-N R-2-phenyl-2-hydroxyacetic acid Natural products OC(=O)C(O)C1=CC=CC=C1 IWYDHOAUDWTVEP-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005574 benzylation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012455 biphasic mixture Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010511 deprotection reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000003291 dopaminomimetic effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-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
- 230000006207 propylation Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/10—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C215/00—Compounds containing amino and hydroxy groups bound to the same carbon skeleton
- C07C215/46—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton
- C07C215/64—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with rings other than six-membered aromatic rings being part of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C217/00—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton
- C07C217/54—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton
- C07C217/74—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with rings other than six-membered aromatic rings being part of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/07—Optical isomers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2602/00—Systems containing two condensed rings
- C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
- C07C2602/04—One of the condensed rings being a six-membered aromatic ring
- C07C2602/10—One of the condensed rings being a six-membered aromatic ring the other ring being six-membered, e.g. tetraline
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Heterocyclic Compounds Containing Sulfur Atoms (AREA)
Description
[スキーム中、Xは、塩素又は臭素などのハロゲン、メシレート、ノシレート又はトシレートなどのスルホネート等から選択される適切な脱離基である。]によるロチゴチン、すなわちS−(I)の調製における中間体としての使用を提供することは、同様に本発明の目的である。
(+)−N−(3,5−ジニトロベンゾイル)−α−フェニルグリシンを用いた光学分割によるラセミ混合物からの(S)−(−)−2−(N−プロピルアミノ)−5−メトキシテトラリン、すなわち(S)−(II)の調製
10gの(II)を120mLのアセトニトリル−水混合物(60:40)に溶解した。次いで、9.4g(0.6当量)の(+)−N−(3,5−ジニトロベンゾイル)−α−フェニルグリシンを加えた。混合物を溶解するまで加熱した。混合物を徐々に冷却した後、最初に濁りが出現し、次に固体沈殿物が出現した。混合物を0〜5℃で2時間放置した。懸濁液を濾別し、得られた固体をオーブンで乾燥した。
(−)−N−(3,5−ジニトロベンゾイル)−α−フェニルグリシンを用いた光学分割によるラセミ混合物からの(S)−(−)−2−(N−プロピルアミノ)−5−ヒドロキシテトラリン、すなわち(S)−(III)の調製
160mLのアセトニトリル−水混合物(70:30)中10gの(III)及び11.7g(0.7当量)の(−)−N−(3,5−ジニトロベンゾイル)−α−フェニルグリシンの懸濁液を溶解するまで加熱した。形成された溶液を徐々に冷却したところ、最初に濁りが出現し、次に固体沈殿物が出現した。混合物を0〜5℃で2時間放置した。懸濁液を濾別し、得られた固体を乾燥した。
(S)−(−)−2−(N−プロピルアミノ)−5−メトキシテトラリン(S−(II))からの(S)−(−)−2−(N−プロピルアミノ)−5−ヒドロキシテトラリン(S−(III))の調製
例1により得られた10gの(S)−(−)−2−(N−プロピルアミノ)−5−メトキシテトラリン((S)−(II))を40mLの48%HBr及び20mLの酢酸と混合した。得られた混合物を3時間還流した。この期間中、固体の沈殿が始まった。懸濁液を0〜5℃に徐々に冷却し、30mLの水を加えた。反応混合物を濾別し、11.7g(収率90%)の(S)−(−)−2−(N−プロピルアミノ)−5−ヒドロキシテトラリン臭化水素酸塩(bromhydrate)を得た。この固体を110mLの水に懸濁し、懸濁液を40℃に加熱した。pHが12.5となるまで10M NaOHを加えたところ、混合物は溶液になった。後に、6M HClで混合物をpH9〜9.5に酸性化したところ、固体の沈殿が発生した。混合物を0〜5℃に徐々に冷却し、濾別した。7.5gの(S)−(−)−2−(N−プロピルアミノ)−5−ヒドロキシテトラリン(S−(III))が得られた(収率90%)。
(S)−(−)−2−(N−プロピルアミノ)−5−ヒドロキシテトラリン(S−(III))からの(6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(S−(I))の調製
実施例2により得られた10gの(S)−(−)−2−(N−プロピルアミノ)−5−ヒドロキシテトラリン(S−(III))を80mLのアセトニトリル中で9gのNaHCO3(2.2当量)及び16gの2−(2−チエニル)エタノール 2−ニトロベンゼンスルホネート(1.05当量)と混合した。混合物を9時間還流し、次いで冷却し、懸濁した塩の除去のために濾過した。60mLの水を濾液に加え、アセトニトリルの除去のために蒸留により濃縮した。40mLのトルエンを加え、層を分離した。有機層を10%NaHCO3で2回洗浄した。次いで、50mLの水及びH3PO4をpH1〜2まで加えた。層分離の後、水性酸層を30%K2CO3でpH7〜7.5に中和し、20mLの酢酸エチルで抽出した。有機層を10mLの水で洗浄し、溶媒からの蒸留により濃縮して、10gの(6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(S−(I))を白色固体として得た(収率70%)。
(S)−(−)−2−(N−プロピルアミノ)−5−メトキシテトラリン(S−(II))からの(S)−2−(N−n−プロピル−N−2−チエニルエチルアミノ)−5−メトキシテトラリン臭化水素酸塩(bromhydrate)(S−(IV).HBr)の調製
例1により得られた10gの(S)−(−)−2−(N−プロピルアミノ)−5−メトキシテトラリン((S)−(II))を60mLのアセトニトリル中で13.8gのK2CO3(2.2当量)及び15gの2−(2−チエニル)エタノール 2−ニトロベンゼンスルホネート(1.05当量)と混合した。混合物を9時間還流し、次いで、室温に冷却した。80mLの水を加え、アセトニトリルからの蒸留により濃縮した。40mLのトルエンを加え、層を分離した。二相混合物を60℃で加熱することにより、有機層を40mLの5%NaHCO3で2回洗浄し、最後に水で洗浄した。次いで、有機層に40mLの水及びH3PO4(pH1〜2まで)を加えた。層分離の後、水性の酸層をNaOH 10MでpH=11に塩基化し、30mLのトルエンで抽出した。有機層を20mLの水で洗浄し、油状生成物が得られるまで蒸留により濃縮した。生成物を、酢酸エチルに再溶解し、HBr/AcOHを加えることによって、その臭化水素酸塩に変換した。生成した固体を濾過により回収し、乾燥した。15.3gの(S)−2−(N−n−プロピル−N−2−チエニルエチルアミノ)−5−メトキシテトラリン臭化水素酸塩(bromhydrate)(S−(IV).HBr)が白色固体として得られた(収率82%)。
(S)−2−(N−n−プロピル−N−2−チエニルエチルアミノ)−5−メトキシテトラリン臭化水素酸塩(bromhydrate)(S−(IV).HBr)からの(6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(S−(I))の調製
10gの(S)−2−(N−n−プロピル−N−2−チエニルエチルアミノ)−5−メトキシテトラリン臭化水素酸塩(bromhydrate)(S−(IV).HBr)を50mLのジクロロメタンに室温で溶解した。混合物を0〜5℃より低い温度に冷却した。55mLのジクロロメタン中BBr3溶液(5当量)を1滴ずつ加え、混合物を撹拌下で0〜5℃に6時間保持した。60mLの水を反応混合物に加えた。白色固体が沈殿し、これを濾過により回収した。湿った固体を20mLの水及び40mLの酢酸エチルに室温で懸濁した。混合物を30%K2CO3でpH=7〜7.5に塩基性化した。層を分離し、水層を20mLの酢酸エチルで抽出し、これを前の有機層と合わせた。有機層を10mLの水で洗浄し、蒸留により濃縮した。6.9gの(6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(S−(I))が白色固体として得られた(収率90%)。
Claims (9)
- 光学活性S−(II)化合物の調製が(+)−N−(3,5−ジニトロベンゾイル)−α−フェニルグリシンによる対応する化合物(II)の光学分割を含む、請求項1に記載の方法。
- 光学活性S−(III)化合物の調製が(−)−N−(3,5−ジニトロベンゾイル)−α−フェニルグリシンによる対応する化合物(III)の光学分割を含む、請求項1に記載の方法。
- (6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(ロチゴチン)の調製における中間体としての請求項2に記載の方法により得られる、99%と同様又はより高い光学純度を有する光学活性S−(II)化合物の使用。
- (6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(ロチゴチン)の調製における中間体としての請求項3に記載の方法により得られる、99%と同様又はより高い光学純度を有する光学活性S−(III)化合物の使用。
- (6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(ロチゴチン)の調製における中間体としての請求項4に記載の式(V)の塩の使用。
- (6S)−(−)−5,6,7,8−テトラヒドロ−6−[プロピル−(2−チエニル)エチル]アミノ−1−ナフトール(ロチゴチン)の調製における中間体としての請求項5に記載の式(VI)の塩の使用。
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