SI1644384T1 - Postopek in intermediati za sintezo entekavirja - Google Patents
Postopek in intermediati za sintezo entekavirjaInfo
- Publication number
- SI1644384T1 SI1644384T1 SI200332236T SI200332236T SI1644384T1 SI 1644384 T1 SI1644384 T1 SI 1644384T1 SI 200332236 T SI200332236 T SI 200332236T SI 200332236 T SI200332236 T SI 200332236T SI 1644384 T1 SI1644384 T1 SI 1644384T1
- Authority
- SI
- Slovenia
- Prior art keywords
- entecavir
- intermediates
- synthesis
- Prior art date
Links
- 230000015572 biosynthetic process Effects 0.000 title 1
- 229960000980 entecavir Drugs 0.000 title 1
- YXPVEXCTPGULBZ-WQYNNSOESA-N entecavir hydrate Chemical compound O.C1=NC=2C(=O)NC(N)=NC=2N1[C@H]1C[C@H](O)[C@@H](CO)C1=C YXPVEXCTPGULBZ-WQYNNSOESA-N 0.000 title 1
- 239000000543 intermediate Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 238000003786 synthesis reaction Methods 0.000 title 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0825—Preparations of compounds not comprising Si-Si or Si-cyano linkages
- C07F7/083—Syntheses without formation of a Si-C bond
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/20—Antivirals for DNA viruses
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D473/00—Heterocyclic compounds containing purine ring systems
- C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
- C07D473/18—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 one oxygen and one nitrogen atom, e.g. guanine
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
- C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
- C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
- C07F7/0814—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring said ring is substituted at a C ring atom by Si
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0825—Preparations of compounds not comprising Si-Si or Si-cyano linkages
- C07F7/0827—Syntheses with formation of a Si-C bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- Communicable Diseases (AREA)
- Oncology (AREA)
- Veterinary Medicine (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Virology (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Epoxy Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Plural Heterocyclic Compounds (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US43254902P | 2002-12-11 | 2002-12-11 | |
| EP03812974A EP1644384B1 (en) | 2002-12-11 | 2003-12-10 | Process and intermediates for the synthesis of entecavir |
| PCT/US2003/039554 WO2004052310A2 (en) | 2002-12-11 | 2003-12-10 | Process and intermediates for synthesis entecavir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SI1644384T1 true SI1644384T1 (sl) | 2013-02-28 |
Family
ID=32507962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SI200332236T SI1644384T1 (sl) | 2002-12-11 | 2003-12-10 | Postopek in intermediati za sintezo entekavirja |
Country Status (18)
Families Citing this family (62)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004002990A2 (en) * | 2002-06-27 | 2004-01-08 | F. Hoffmann-La Roche Ag | Synthesis of purine derivatives |
| IN2012DN00606A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 2002-12-11 | 2015-06-12 | Bristol Mayers Squibb Company | |
| TW200540175A (en) * | 2004-06-04 | 2005-12-16 | Bristol Myers Squibb Co | Process for the preparation of entecavir and novel intermediates thereof via carbon-silicon oxidation |
| US7511139B2 (en) | 2004-06-04 | 2009-03-31 | Bristol-Myers Squibb Company | Process for the preparation of entecavir and novel intermediates thereof via carbon-silicon oxidation |
| CN100379736C (zh) * | 2005-05-13 | 2008-04-09 | 上海仲夏化学有限公司 | 恩替卡韦的制备方法 |
| CN1699366A (zh) * | 2005-06-03 | 2005-11-23 | 北京市典范科技有限责任公司 | 嘌呤衍生物 |
| US20070060599A1 (en) * | 2005-09-09 | 2007-03-15 | Dimarco John D | Crystalline forms of [1S-(1alpha, 3alpha, 4beta)]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one |
| CN101863842B (zh) * | 2006-08-24 | 2012-02-01 | 江苏正大天晴药业股份有限公司 | 恩替卡韦中间体及合成方法 |
| CN101130542B (zh) * | 2006-08-24 | 2010-08-04 | 江苏正大天晴药业股份有限公司 | 抗病毒核苷类似物的合成方法 |
| CN101838207B (zh) * | 2006-08-24 | 2012-04-25 | 江苏正大天晴药业股份有限公司 | 恩替卡韦的中间体及合成方法 |
| CN101838270B (zh) * | 2006-08-24 | 2012-04-18 | 江苏正大天晴药业股份有限公司 | 恩替卡韦的中间体及制备 |
| EP2078054A1 (en) * | 2006-10-30 | 2009-07-15 | Pirelli Tyre S.p.A. | Tire for vehicle wheels comprising crosslinked elastomeric composition |
| CN101245068A (zh) | 2007-02-14 | 2008-08-20 | 浙江医药股份有限公司新昌制药厂 | 结晶型态的恩替卡韦及其制备方法和其药物组合物及用途 |
| CN101371841A (zh) * | 2007-08-23 | 2009-02-25 | 浙江医药股份有限公司新昌制药厂 | 结晶型恩替卡韦制剂及其制备方法和应用 |
| CN101284799B (zh) | 2007-03-23 | 2013-04-03 | 浙江医药股份有限公司新昌制药厂 | 咖啡酰奎宁酸含氮衍生物及其制备方法和其药物组合物及用途 |
| CN101074217B (zh) * | 2007-04-04 | 2010-11-24 | 北京精华耀邦医药科技有限公司 | 通过制备色谱分离得到高纯度恩替卡韦关键中间体的方法 |
| CN101397333A (zh) | 2007-09-27 | 2009-04-01 | 浙江医药股份有限公司新昌制药厂 | 去羟基万古霉素及其制备方法、和其药物组合物及其用途 |
| CN101723945B (zh) * | 2008-10-17 | 2011-11-02 | 上海清松制药有限公司 | 一种制备抗病毒药物恩替卡韦中间体的方法 |
| KR101150254B1 (ko) * | 2008-12-26 | 2012-06-12 | 한미사이언스 주식회사 | 신규 중간체 및 이를 활용한 엔테카비르 제조방법 |
| CN101828693B (zh) | 2009-03-09 | 2013-01-02 | 浙江医药股份有限公司新昌制药厂 | 制备低粘度高流动性类胡萝卜素油悬浮液的方法及其应用 |
| CN101531660B (zh) * | 2009-04-14 | 2012-07-04 | 安徽贝克联合制药有限公司 | 一种恩替卡韦一水合物的工业化生产工艺 |
| KR101301200B1 (ko) * | 2009-10-12 | 2013-09-06 | 한미사이언스 주식회사 | 엔테카비르의 신규한 제조방법 및 이에 사용되는 중간체 |
| CN101693713B (zh) * | 2009-10-28 | 2011-11-09 | 福建广生堂药业有限公司 | 一种恩替卡韦的晶型及其制备方法和药物应用 |
| CN101781301B (zh) * | 2010-01-15 | 2013-04-10 | 复旦大学 | 一种制备恩替卡韦的方法 |
| US8481728B2 (en) | 2010-02-16 | 2013-07-09 | Scinopharm Taiwan, Ltd. | Process for preparing entecavir and its intermediates |
| CN101805339B (zh) * | 2010-04-12 | 2012-01-11 | 王明 | 一种制备恩替卡韦化合物的方法 |
| CA2705953C (en) * | 2010-05-31 | 2018-05-01 | Alphora Research Inc. | Carbanucleoside synthesis and intermediate compounds useful therein |
| CN101891741B (zh) * | 2010-07-06 | 2013-01-23 | 苏州汉德森医药科技有限公司 | 抗病毒药恩替卡韦的新合成工艺 |
| CN106928227B (zh) | 2010-07-15 | 2020-06-30 | 浙江奥翔药业股份有限公司 | 恩替卡韦的合成方法及其中间体化合物 |
| TWI668220B (zh) * | 2010-08-30 | 2019-08-11 | 浙江奧翔藥業股份有限公司 | 恩替卡韋的合成方法及其中間體化合物 |
| KR101269491B1 (ko) * | 2010-12-23 | 2013-05-31 | 주식회사 한서켐 | 엔테카비어 제조방법 |
| EP2474548A1 (en) | 2010-12-23 | 2012-07-11 | Esteve Química, S.A. | Preparation process of an antiviral drug and intermediates thereof |
| CN102225938A (zh) * | 2011-04-25 | 2011-10-26 | 海南卫康制药(潜山)有限公司 | 恩替卡韦一水合物新合成工艺 |
| CN102267875B (zh) * | 2011-06-17 | 2013-04-24 | 常州寅盛药业有限公司 | 一种恩替卡韦中间体的制备方法 |
| CN102952156A (zh) * | 2011-08-29 | 2013-03-06 | 南京工业大学 | 一种抗乙肝药物恩替卡韦中间体及其合成 |
| CN102952135B (zh) * | 2011-08-31 | 2015-04-08 | 南京工业大学 | 一种乙肝药物恩替卡韦的合成方法 |
| EP2597096A1 (en) | 2011-11-24 | 2013-05-29 | Esteve Química, S.A. | Process for preparing entecavir and intermediates thereof |
| CN103304375B (zh) * | 2012-03-12 | 2017-04-12 | 浙江奥翔药业股份有限公司 | 恩替卡韦的合成中间体及其制备方法 |
| US9908840B2 (en) | 2012-10-02 | 2018-03-06 | California Institute Of Technology | Reactions of aromatic substrates with base-activated hydrosilanes-silylations and reductive cleavage |
| RU2651570C2 (ru) | 2012-10-02 | 2018-04-23 | Кэлифорниа Инститьют Оф Текнолоджи | Силилирование ароматических соединений без переходных металлов |
| CN104017014A (zh) * | 2013-02-28 | 2014-09-03 | 浙江星月药物科技股份有限公司 | 一类恩替卡韦的中间体的制备方法，以及中间体 |
| CN104016984A (zh) * | 2013-02-28 | 2014-09-03 | 浙江星月药物科技股份有限公司 | 一种恩替卡韦及其中间体的制备方法，以及中间体 |
| CN104017015B (zh) * | 2013-02-28 | 2017-04-05 | 浙江星月药物科技股份有限公司 | 一类恩替卡韦的中间体的制备方法，以及中间体 |
| CN104017016B (zh) * | 2013-02-28 | 2017-04-05 | 浙江星月药物科技股份有限公司 | 一类恩替卡韦的中间体的制备方法，以及中间体 |
| CN104017012A (zh) * | 2013-02-28 | 2014-09-03 | 浙江星月药物科技股份有限公司 | 一类恩替卡韦的中间体的制备方法，以及中间体 |
| CN104177396A (zh) * | 2013-05-23 | 2014-12-03 | 浙江星月药物科技股份有限公司 | 恩替卡韦中间体及其制备方法 |
| CN104177397B (zh) * | 2013-05-23 | 2017-10-13 | 浙江星月药物科技股份有限公司 | 恩替卡韦中间体及其制备方法 |
| CN104177394B (zh) * | 2013-05-23 | 2017-12-05 | 浙江星月药物科技股份有限公司 | 恩替卡韦中间体及其制备方法 |
| GB201313238D0 (en) | 2013-07-24 | 2013-09-04 | Avexxin As | Process for the preparation of a polyunsaturated ketone compound |
| CA2955546C (en) | 2014-08-06 | 2022-12-13 | California Institute Of Technology | Silylation of aromatic heterocycles by earth abundant transition-metal-free catalysts |
| KR101640503B1 (ko) | 2015-04-15 | 2016-07-18 | 동방에프티엘(주) | 엔테카비르 일수화물의 개선된 제조방법 |
| KR101640504B1 (ko) | 2015-04-15 | 2016-07-18 | 동방에프티엘(주) | 엔테카비르 일수화물의 제조방법 |
| CN105037363B (zh) * | 2015-07-13 | 2016-08-24 | 山东罗欣药业集团股份有限公司 | 一种恩替卡韦化合物的新合成方法 |
| KR102351734B1 (ko) * | 2016-04-07 | 2022-01-14 | 유니버시티 오브 조지아 리서치 파운데이션, 인코포레이티드 | 2'-플루오로-6'-메틸렌-탄소환식 아데노신(fmca) 및 2'-플루오로-6'-메틸렌-탄소환식 구아노신(fmcg)의 합성 |
| CN107325122B (zh) * | 2017-01-06 | 2020-05-01 | 常州博海威医药科技股份有限公司 | 制备贝前列腺素的新中间体及其制备方法 |
| CN107163049B (zh) * | 2017-05-31 | 2019-06-18 | 湖北远大生命科学与技术有限责任公司 | 一种恩替卡韦的制备方法 |
| WO2019080686A1 (zh) * | 2017-10-26 | 2019-05-02 | 广州市朗启医药科技有限责任公司 | 恩替卡韦中间体及其合成方法以及恩替卡韦的合成方法 |
| CN109705063B (zh) | 2017-10-26 | 2021-01-01 | 广州市朗启医药科技有限责任公司 | 恩替卡韦中间体及其合成方法以及恩替卡韦的合成方法 |
| CN109232637B (zh) * | 2018-10-29 | 2020-11-24 | 常州博海威医药科技股份有限公司 | 一种恩替卡韦中间体的制备方法 |
| CN109593090A (zh) * | 2019-01-25 | 2019-04-09 | 连云港贵科药业有限公司 | 一种恩替卡韦的合成方法 |
| CN113831341B (zh) * | 2020-06-08 | 2025-06-10 | 连云港润众制药有限公司 | 一种恩替卡韦的制备方法 |
| CN112625041A (zh) * | 2020-12-25 | 2021-04-09 | 常州博海威医药科技股份有限公司 | 恩替卡韦的新制备方法以及中间体 |
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| US4594439A (en) | 1980-08-06 | 1986-06-10 | The Board Of Trustees Of The Leland Stanford Jr. University | Method for asymmetric epoxidation |
| US4471130A (en) | 1980-08-06 | 1984-09-11 | The Board Of Trustees Of The Leland Stanford Junior University | Method for asymmetric epoxidation |
| US4900847A (en) | 1985-04-04 | 1990-02-13 | Massachusetts Institute Of Technology | Catalytic asymmetric epoxidation |
| JPH01207257A (ja) * | 1988-02-15 | 1989-08-21 | Nippon Oil & Fats Co Ltd | α−リノレン酸の分離法 |
| US5206244A (en) * | 1990-10-18 | 1993-04-27 | E. R. Squibb & Sons, Inc. | Hydroxymethyl (methylenecyclopentyl) purines and pyrimidines |
| EP0630897A3 (en) * | 1993-06-25 | 1995-03-01 | Bristol Myers Squibb Co | 3-hydroxy-4-hydroxymethyl-2-methylene-cyclopentyl purines and pyrimidines. |
| US5665890A (en) * | 1995-03-14 | 1997-09-09 | President And Fellows Of Harvard College | Stereoselective ring opening reactions |
| WO1998009964A1 (en) * | 1996-09-03 | 1998-03-12 | Bristol-Myers Squibb Company | IMPROVED PROCESS FOR PREPARING THE ANTIVIRAL AGENT [1S-(1α, 3α, 4β)]-2-AMINO-1,9-DIHYDRO-9-[4-HYDROXY-3-(HYDROXYMETHYL)-2-METHYLENECYCLOPENTYL]-6H-PURIN-6-ONE |
| US6127159A (en) * | 1997-06-06 | 2000-10-03 | The Board Of Trustees Of The Leland Stanford Junior University | Mitofusin genes and their uses |
| SK288008B6 (sk) * | 2000-02-29 | 2012-10-02 | Bristol-Myers Squibb Company | Pharmaceutical composition for use in the treatment of hepatitis B virus infection or co-infection |
| CA2311734C (en) * | 2000-04-12 | 2011-03-08 | Bristol-Myers Squibb Company | Flash-melt oral dosage formulation |
| BR0110023A (pt) * | 2000-04-13 | 2003-12-30 | Pharmasset Ltd | Derivados de nucleosìdeo 3'-ou-2' substituìdos para tratamento de infecções por vìrus da hepatite |
| IN2012DN00606A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 2002-12-11 | 2015-06-12 | Bristol Mayers Squibb Company | |
| US7511139B2 (en) * | 2004-06-04 | 2009-03-31 | Bristol-Myers Squibb Company | Process for the preparation of entecavir and novel intermediates thereof via carbon-silicon oxidation |
| US20070060599A1 (en) * | 2005-09-09 | 2007-03-15 | Dimarco John D | Crystalline forms of [1S-(1alpha, 3alpha, 4beta)]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one |
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