CN106631831A - 一种左旋特布他林的制备方法 - Google Patents
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- 229960000195 terbutaline Drugs 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title abstract description 10
- DLSOILHAKCBARI-UHFFFAOYSA-N n-benzyl-2-methylpropan-2-amine Chemical compound CC(C)(C)NCC1=CC=CC=C1 DLSOILHAKCBARI-UHFFFAOYSA-N 0.000 claims abstract description 4
- MCQRPQCQMGVWIQ-UHFFFAOYSA-N boron;methylsulfanylmethane Chemical compound [B].CSC MCQRPQCQMGVWIQ-UHFFFAOYSA-N 0.000 claims abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 39
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 32
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 32
- 238000002360 preparation method Methods 0.000 claims description 32
- 239000000376 reactant Substances 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- 238000001556 precipitation Methods 0.000 claims description 21
- XWTYSIMOBUGWOL-UHFFFAOYSA-N (+-)-Terbutaline Chemical compound CC(C)(C)NCC(O)C1=CC(O)=CC(O)=C1 XWTYSIMOBUGWOL-UHFFFAOYSA-N 0.000 claims description 20
- 239000002904 solvent Substances 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 16
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 16
- UORVGPXVDQYIDP-UHFFFAOYSA-N trihydridoboron Substances B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 10
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- 229910000085 borane Inorganic materials 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
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- 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 claims description 4
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- KFVSLSTULZVNPG-UHFFFAOYSA-N terbutaline sulfate Chemical compound [O-]S([O-])(=O)=O.CC(C)(C)[NH2+]CC(O)C1=CC(O)=CC(O)=C1.CC(C)(C)[NH2+]CC(O)C1=CC(O)=CC(O)=C1 KFVSLSTULZVNPG-UHFFFAOYSA-N 0.000 claims description 3
- 229960005105 terbutaline sulfate Drugs 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- ODWXUNBKCRECNW-UHFFFAOYSA-M bromocopper(1+) Chemical compound Br[Cu+] ODWXUNBKCRECNW-UHFFFAOYSA-M 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- RESHZVQZWMQUMB-UHFFFAOYSA-N 1,3-bis(phenylmethoxy)benzene Chemical class C=1C=CC=CC=1COC(C=1)=CC=CC=1OCC1=CC=CC=C1 RESHZVQZWMQUMB-UHFFFAOYSA-N 0.000 claims 1
- 238000006555 catalytic reaction Methods 0.000 abstract description 4
- 150000003839 salts Chemical class 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- KOJXGMJOTRYLBD-UHFFFAOYSA-N 1-[3,5-bis(phenylmethoxy)phenyl]ethanone Chemical compound C=1C(OCC=2C=CC=CC=2)=CC(C(=O)C)=CC=1OCC1=CC=CC=C1 KOJXGMJOTRYLBD-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 abstract 1
- 238000005893 bromination reaction Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 42
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- ANZXOIAKUNOVQU-UHFFFAOYSA-N bambuterol Chemical compound CN(C)C(=O)OC1=CC(OC(=O)N(C)C)=CC(C(O)CNC(C)(C)C)=C1 ANZXOIAKUNOVQU-UHFFFAOYSA-N 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 150000008062 acetophenones Chemical class 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 208000006673 asthma Diseases 0.000 description 3
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- 239000011780 sodium chloride Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- KMGUEILFFWDGFV-UHFFFAOYSA-N 2-benzoyl-2-benzoyloxy-3-hydroxybutanedioic acid Chemical compound C=1C=CC=CC=1C(=O)C(C(C(O)=O)O)(C(O)=O)OC(=O)C1=CC=CC=C1 KMGUEILFFWDGFV-UHFFFAOYSA-N 0.000 description 2
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
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- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 210000000621 bronchi Anatomy 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 229960001270 d- tartaric acid Drugs 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002391 heterocyclic compounds Chemical class 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LOPKSXMQWBYUOI-UHFFFAOYSA-N 1-amino-2,3-dihydro-1h-inden-2-ol Chemical class C1=CC=C2C(N)C(O)CC2=C1 LOPKSXMQWBYUOI-UHFFFAOYSA-N 0.000 description 1
- RHHVCIKVRLMNFC-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)ethanol Chemical class OCCC1=CC=CC(OCC=2C=CC=CC=2)=C1 RHHVCIKVRLMNFC-UHFFFAOYSA-N 0.000 description 1
- 206010002198 Anaphylactic reaction Diseases 0.000 description 1
- 241001489226 Barnettozyma californica Species 0.000 description 1
- 206010006482 Bronchospasm Diseases 0.000 description 1
- 206010014561 Emphysema Diseases 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 239000007868 Raney catalyst Substances 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- 208000005392 Spasm Diseases 0.000 description 1
- 208000005279 Status Asthmaticus Diseases 0.000 description 1
- 239000000048 adrenergic agonist Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000036783 anaphylactic response Effects 0.000 description 1
- 208000003455 anaphylaxis Diseases 0.000 description 1
- 239000000427 antigen Substances 0.000 description 1
- 102000036639 antigens Human genes 0.000 description 1
- 108091007433 antigens Proteins 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000000051 benzyloxy group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])O* 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 230000007885 bronchoconstriction 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
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000004081 cilia Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- QTMDXZNDVAMKGV-UHFFFAOYSA-L copper(ii) bromide Chemical class [Cu+2].[Br-].[Br-] QTMDXZNDVAMKGV-UHFFFAOYSA-L 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
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- 210000000981 epithelium Anatomy 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N glycolonitrile Natural products N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
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- FEWJPZIEWOKRBE-LWMBPPNESA-N levotartaric acid Chemical compound OC(=O)[C@@H](O)[C@H](O)C(O)=O FEWJPZIEWOKRBE-LWMBPPNESA-N 0.000 description 1
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- 239000002243 precursor Substances 0.000 description 1
- 150000003283 rhodium Chemical class 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/63—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of halogen; by substitution of halogen atoms by other halogen atoms
-
- 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
-
- 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
- C07C213/04—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reaction of ammonia or amines with olefin oxides or halohydrins
-
- 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
- C07C215/02—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C215/22—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being unsaturated
- C07C215/28—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being unsaturated and containing six-membered aromatic rings
- C07C215/30—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being unsaturated and containing six-membered aromatic rings containing hydroxy groups and carbon atoms of six-membered aromatic rings bound to the same carbon atom of the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
- C07C41/26—Preparation of ethers by reactions not forming ether-oxygen bonds by introduction of hydroxy or O-metal groups
-
- 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
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- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明首次公开了一种左旋特布他林的制备方法,即以3,5‑二苄氧基苯乙酮为起始物料,经溴代反应后用S‑甲基CBS催化,硼烷二甲硫醚还原,与N‑苄基叔丁胺偶联后氢化脱苄基,制备光学纯的R‑特布他林,用相应的酸成盐后制备R‑特布他林的药用盐。
Description
技术领域
本发明涉及一种左旋特布他林的制备方法,属于药品的技术领域
背景技术
特布他林是一种肾上腺素能激动剂,可选择性激动β2受体,舒张支气管平滑肌,抑制内源性致痉挛物质的释放及内源性介质引起的水肿,提高支气管粘膜纤毛上皮廓清能力,也可舒张子宫平滑肌,临床用于治疗支气管哮喘,喘息性支气管炎,肺气肿等。
扬州大学硕士学位论文“班布特罗左旋异构体对动物哮喘模型的药理学研究”对班布特罗(BM)异构体进行了药理学研究,结果显示:S-BM不仅没有R-BM所具备的强大支气管平滑肌舒张作用,而且大剂量S-BM表现出较模型组更为剧烈的支气管收缩效应,这种现象可能与S-BM增加气道对过敏性抗原的敏感性有关,S-BM这些特性非但不利于哮喘的治疗,甚至可加重哮喘,诱发重症哮喘或哮喘持续状态。特布他林作为班布特罗的原型药具有同样的药理活性,由此可见将rac-TB进行化学拆分,剔除S-TB,获得纯化的R-TB是有其独特的意义和临床价值。目前国内对班布特罗异构体的开发只有东莞市凯法生物医药有限公司,特布他林异构体药物未见上市。
左旋特布他林的制备方法文献报道较多,主要有拆分法和不对称合成两种方法。邓金根等利用D-酒石酸及其二芳基甲酰衍生物二苯甲酰酒石酸(DBTA)和二对甲苯甲酰酒石酸(DTTA)的组合物成功拆分了特布他林对映体,其光学纯度大于99%(合成化学1999,7(4)340;CN1273966A);Vries等用D-酒石酸的二芳基甲酰衍生物的组合来拆分,但由于多个拆分剂的组合引起拆分剂浓度相对降低,影响了结晶的析出,导致拆分结果不理想(Angew Chem Int Ed 1998,37(17)2349);焦鹏飞等用L-酒石酸己酯作为拆分剂用中空纤维进行分离,光学纯度达到了99%,但研究工作停留在了研究阶段(应用化学22卷8期,2005,818-822)。同时,左旋特布他林的不对称合成研究也在进行中。BAKALE等报道了在手性氧氮硼杂环化合物的催化下,用硼烷对特布他林的前体酮羰基进行不对称还原,虽能获得较高的光学和化学产率,但手性氧氮硼杂环化合物价格较贵,催化效率较低,且无法回收利用(Bakale R P.Sepc Chem1995,15,249)。Shohei Taketomi用Williopsis californica酵母菌催化经不对称还原合成了盐酸特布他林(Journal of Molecular Catalysis B:Enzymatic84(2012)83-88);Franz Effenberger以手性α-羟基苯乙氰为起始原料经水解,烷基化反应后制备了左旋特布他林(J.Org.Chem.1997,62,3867-3873);Jiahong Li等用铑配合物催化合成了左旋特布他林;Krzysztof Jozwiak用手性1-氨基-2-茚醇为催化剂用硼烷二甲硫醚还原苯乙酮的方法成功制备了左旋特布他林(J.Med.Chem.2007,50,2903-2915)。
发明内容
本发明旨在提供一种左旋特布他林的制备方法。
本发明还提供了左旋特布他林硫酸盐的制备方法。
本发明旨在提供一种以手性恶唑硼烷及其衍生为催化剂,用硼烷二甲硫醚还原苯乙酮类化合物的方法制备左旋特布他林。
发明人发现,CBS在低温条件下的手性选择性较差,产品EE值较低,但是经过大量的研究发现,可以通过改变反应温度和加料速度来控制产品的光学纯度,从而制备高纯度的左旋特布他林。因此本发明所记载的制备方法是发明人经过大量创造性研究得到的,具有新颖性、创造性和实用性,该制备方法可以大大节约成本,适合工业化生产。
本发明提供的左旋特布他林的制备方法包括以下步骤:
步骤一:制备3,5-二苄氧基-α-溴代苯乙酮;
步骤二:制备(R)-3,5-二苄氧基-α-溴代苯乙醇;
步骤三:制备(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇;
步骤四:制备(R)-N-叔丁基-3,5-二羟基苯乙醇(R-特布他林)。
具体的制备方法包括:
步骤一:将溴化铜加入乙酸乙酯,加热回流,得反应液,备用;将3,5-二苄氧基苯乙酮用氯仿溶解后加入到反应液中,继续回流直到反应液的颜色由黑绿色变为浅棕色,过滤,减压除去溶剂,得油状物,对油状物进行重结晶,得黄色固体,即3,5-二苄氧基-α-溴代苯乙酮。
步骤二:(1)氮气保护下向催化剂的无水四氢呋喃溶液中滴加还原剂,在20~50分钟内滴加完毕,得反应液,备用;
(2)0℃条件下将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌1~3小时;
(3)在0~60℃条件下继续搅拌20~50分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
步骤三:回流条件下,向N-苄基叔丁胺的绝对无水乙醇溶液中加入(R)-3,5-二苄氧基-α-溴代苯乙醇的无水甲苯溶液,加热回流18~22小时,减压除去溶剂,向反应液中加入无水乙醚,析出沉淀,过滤,滤液用过量的2N的硫酸酸化,析出沉淀,过滤,沉淀用丙酮溶解后重结晶,得白色固体,即(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇。
步骤四:将(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇溶于无水乙醇中,加入Raney镍,于40~50℃常压氢化14~20小时,减压蒸干,得白色固体,即R-特布他林。其中,优选氢化16小时。
以上制备方法,“步骤二”中:
1、步骤(1)中所述的催化剂是指手性恶唑硼烷及其衍生物,优选R-CBS、S-CBS、R-甲基CBS、S-甲基CBS中的一种,更优选S-甲基CBS;还原剂是指硼烷的溶液,具体是指硼烷二甲硫醚的溶液。
2、步骤(1)中优选在20~40分钟内滴加完毕,更优选在30分钟内滴加完毕;步骤(2)中优选滴加完毕后保温搅拌2小时;步骤(3)中优选在20~50℃条件下继续搅拌20~40分钟,更优选在30~50℃条件下继续搅拌30分钟。
由本发明制备得到的R-特布他林的光学纯度>99%,其对应过剩值≥98%。
由本发明制备得到的R-特布他林还可以用来制备其药用盐,例如,其硫酸盐的制备方法为:
将R-特布他林加蒸馏水溶解,加适量0.1mol/L硫酸调pH至5-6,加入适量乙醇,减压蒸干,加适量甲醇溶解,放冷,析出沉淀,过滤,沉淀加入适量中,回流,放冷,析出白色固体,即R-特布他林硫酸盐;其中,优选加适量0.1mol/L硫酸调pH至5.6。
参照以上方法还可以制备R-特布他林的其他药用盐,例如盐酸盐、磷酸盐等。
以下通过实施例形式的具体实施方式,对本发明的上述内容作进一步的详细说明。但不应将此理解为本发明上述主题的范围仅限于以下的实施例。凡基于本发明上述内容所实现的技术均属于本发明的范围。
具体实施方式
实施例1:3,5-二苄氧基-α-溴代苯乙酮的制备
将11.2g溴化铜加入到配有机械搅拌和冷凝管的三口瓶中,加入25ml乙酸乙酯,加热回流,得反应液,备用;将10g3,5-二苄氧基苯乙酮用30ml氯仿溶解后加入到反应液中,继续回流直到反应液的颜色由黑绿色变为浅棕色,过滤,减压除去溶剂,得油状物,对油状物进行重结晶,得黄色固体,即3,5-二苄氧基-α-溴代苯乙酮。
实施例2:(R)-3,5-二苄氧基-α-溴代苯乙醇的制备
氮气保护下缓慢地向0.2mol S-甲基CBS的无水四氢呋喃溶液中滴加5mol硼烷二甲硫醚的溶液,0.5小时内滴加完毕,得反应液,备用;0℃条件下缓慢将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌2小时,在40℃条件下继续搅拌0.5小时,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
实施例3:(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇的制备
回流条件下,向N-苄基叔丁胺的绝对无水乙醇溶液中加入(R)-3,5-二苄氧基-α-溴代苯乙醇的无水甲苯溶液,加热回流20小时,减压除去溶剂,向反应液中加入无水乙醚,析出沉淀,过滤,滤液用过量的2N的硫酸酸化,析出沉淀,过滤,沉淀用丙酮溶解后重结晶,得白色固体,即(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇。
实施例4:(R)-N-叔丁基-3,5-二羟基基苯乙醇(R-特布他林)的制备
将(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇溶于无水乙醇中,加入Raney镍,于40~50℃常压氢化16小时,减压蒸干,得白色固体,即R-特布他林。
实施例5:(R)-3,5-二苄氧基-α-溴代苯乙醇的制备
氮气保护下缓慢地向0.2mol R-甲基CBS的无水四氢呋喃溶液中滴加5mol硼烷二甲硫醚的溶液,40分钟内滴加完毕,得反应液,备用;0℃条件下缓慢将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌1.5小时,在30℃条件下继续搅拌40分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
实施例6:(R)-3,5-二苄氧基-α-溴代苯乙醇的制备
氮气保护下缓慢地向0.2mol S-甲基CBS的无水四氢呋喃溶液中滴加5mol硼烷二甲硫醚的溶液,20分钟内滴加完毕,得反应液,备用;0℃条件下缓慢将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌1.5小时,在50℃条件下继续搅拌20分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
实施例7:(R)-3,5-二苄氧基-α-溴代苯乙醇的制备
氮气保护下缓慢地向0.2mol R-CBS的无水四氢呋喃溶液中滴加5mol硼烷二甲硫醚的溶液,30分钟内滴加完毕,得反应液,备用;0℃条件下缓慢将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌1小时,在20℃条件下继续搅拌50分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
实施例8:(R)-3,5-二苄氧基-α-溴代苯乙醇的制备
氮气保护下缓慢地向0.2mol S-CBS的无水四氢呋喃溶液中滴加5mol硼烷二甲硫醚的溶液,50分钟内滴加完毕,得反应液,备用;0℃条件下缓慢将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌3小时,在10℃条件下继续搅拌50分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
实施例9:(R)-3,5-二苄氧基-α-溴代苯乙醇的制备
氮气保护下缓慢地向0.2mol S-甲基CBS的无水四氢呋喃溶液中滴加5mol硼烷二甲硫醚的溶液,30分钟内滴加完毕,得反应液,备用;0℃条件下缓慢将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌2小时,在60℃条件下继续搅拌20分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
实施例10:R-特布他林硫酸盐的制备
将R-特布他林加蒸馏水溶解,加适量0.1mol/L硫酸调pH至5.6,加入适量乙醇,减压蒸干,加适量甲醇溶解,放冷,析出沉淀,过滤,沉淀加入适量中,回流,放冷,析出白色固体,即R-特布他林硫酸盐。
实施例11:R-特布他林盐酸盐的制备
将R-特布他林加蒸馏水溶解,加适量0.1mol/L盐酸调pH至6,加入适量乙醇,减压蒸干,加适量甲醇溶解,放冷,析出沉淀,过滤,沉淀加入适量中,回流,放冷,析出白色固体,即R-特布他林盐酸盐。
实施例12:R-特布他林硫酸盐的制备
将R-特布他林加蒸馏水溶解,加适量0.1mol/L磷酸调pH至5,加入适量乙醇,减压蒸干,加适量甲醇溶解,放冷,析出沉淀,过滤,沉淀加入适量中,回流,放冷,析出白色固体,即R-特布他林磷酸盐。
Claims (9)
1.一种左旋特布他林的制备方法,其特征在于,它是通过以下步骤制备得到的:
步骤一:制备3,5-二苄氧基-α-溴代苯乙酮;
步骤二:制备(R)-3,5-二苄氧基-α-溴代苯乙醇;
步骤三:制备(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇;
步骤四:制备(R)-N-叔丁基-3,5-二羟基苯乙醇(R-特布他林)。
2.根据权利要求1所述的制备方法,其特征在于,步骤一是这样制备的:
将溴化铜加入乙酸乙酯,加热回流,得反应液,备用;将3,5-二苄氧基苯乙酮用氯仿溶解后加入到反应液中,继续回流直到反应液的颜色由黑绿色变为浅棕色,过滤,减压除去溶剂,得油状物,对油状物进行重结晶,得黄色固体,即3,5-二苄氧基-α-溴代苯乙酮。
3.根据权利要求1所述的制备方法,其特征在于,步骤二是这样制备的:
(1)氮气保护下向催化剂的无水四氢呋喃溶液中滴加还原剂,在20~50分钟内滴加完毕,得反应液,备用;
(2)0℃条件下将3,5-二苄氧基-α-溴代苯乙酮的无水四氢呋喃溶液滴加到反应液中,滴加完毕后保温搅拌1~3小时;
(3)在0~60℃条件下继续搅拌20~50分钟,用甲醇淬灭反应,减压除去溶剂,得残余物,向残余物中加入氯仿,分别用0.2mol/L的硫酸溶液、饱和氯化钠溶液洗涤有机相,无水硫酸钠干燥,过滤除去干燥剂,减压除去溶剂,得白色固体,即(R)-3,5-二苄氧基-α-溴代苯乙醇。
4.根据权利要求1所述的制备方法,其特征在于,步骤三是这样制备的:
回流条件下,向N-苄基叔丁胺的绝对无水乙醇溶液中加入(R)-3,5-二苄氧基-α-溴代苯乙醇的无水甲苯溶液,加热回流18~22小时,减压除去溶剂,向反应液中加入无水乙醚,析出沉淀,过滤,滤液用过量的2N的硫酸酸化,析出沉淀,过滤,沉淀用丙酮溶解后重结晶,得白色固体,即(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇。
5.根据权利要求1所述的制备方法,其特征在于,步骤四是这样制备的:
将(R)-N-苄基-N-叔丁基-3,5-二苄氧基苯乙醇溶于无水乙醇中,加入Raney镍,于40~50℃常压氢化14~20小时,减压蒸干,得白色固体,即R-特布他林。
6.根据权利要求3所述的制备方法,其特征在于,(1)中所述的催化剂是指手性恶唑硼烷及其衍生物,优选R-CBS、S-CBS、R-甲基CBS、S-甲基CBS中的一种,更优选S-甲基CBS;还原剂是指硼烷的溶液,具体是指硼烷二甲硫醚的溶液。
7.根据权利要求3所述的制备方法,其特征在于,(1)中优选在20~40分钟内滴加完毕,更优选在30分钟内滴加完毕;(2)中优选滴加完毕后保温搅拌2小时;(3)中优选在20~50℃条件下继续搅拌20~40分钟,更优选在30~50℃条件下继续搅拌30分钟。
8.根据权利要求1所述的制备方法,其特征在于,制备的左旋特布他林的光学纯度>99%,其对应过剩值≥98%。
9.一种左旋特布他林硫酸盐的制备方法,其特征在于,它是这样制备的:
将左旋特布他林加蒸馏水溶解,加适量0.1mol/L硫酸调pH至5~6,加入适量乙醇,减压蒸干,加适量甲醇溶解,放冷,析出沉淀,过滤,沉淀加入适量中,回流,放冷,析出白色固体,即左旋特布他林硫酸盐。
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CN115210210A (zh) * | 2020-03-02 | 2022-10-18 | 谭文 | 一种(r)-盐酸特布他林的结晶形式 |
CN112250586A (zh) * | 2020-10-21 | 2021-01-22 | 福安药业集团宁波天衡制药有限公司 | 一种硫酸特布他林及其b晶型的制备方法 |
WO2022226812A1 (zh) * | 2021-04-27 | 2022-11-03 | 苏州弘森药业股份有限公司 | 一种使用手性辅基制备左旋特布他林的方法 |
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