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Gracia‐Vitoria J, Osante I, Cativiela C. The Crucial Role of
S
‐oxidation State on the Selectivity and Reaction Rate of the 1,3‐Dipolar Cycloaddition of Azomethine Ylides and Homochiral Thiazolines. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jaime Gracia‐Vitoria
- Departamento de Química Orgánica Instituto de Síntesis Química y Catálisis Homogénea ISQCH CSIC-Universidad de Zaragoza Calle de Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Iñaki Osante
- Departamento de Química Orgánica Instituto de Síntesis Química y Catálisis Homogénea ISQCH CSIC-Universidad de Zaragoza Calle de Pedro Cerbuna, 12 50009 Zaragoza Spain
| | - Carlos Cativiela
- Departamento de Química Orgánica Instituto de Síntesis Química y Catálisis Homogénea ISQCH CSIC-Universidad de Zaragoza Calle de Pedro Cerbuna, 12 50009 Zaragoza Spain
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2
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Jiang L, Pang J, Yang L, Li W, Duan L, Zhang G, Luo Y. Engineering endogenous l-proline biosynthetic pathway to boost trans-4-hydroxy-l-proline production in Escherichia coli. J Biotechnol 2021; 329:104-117. [PMID: 33539894 DOI: 10.1016/j.jbiotec.2021.01.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 01/11/2021] [Accepted: 01/13/2021] [Indexed: 11/16/2022]
Abstract
Non-proteinogenic trans-4-hydroxy-l-proline (t4HYP), a crucial naturally occurred amino acid, is present in most organisms. t4HYP is a regio- and stereo-selectively hydroxylated product of l-proline and a valuable building block for pharmaceutically important intermediates/ingredients synthesis. Microbial production of t4HYP has aroused extensive investigations because of its low-cost and environmentally benign features. Herein, we reported metabolic engineering of endogenous l-proline biosynthetic pathway to enhance t4HYP production in trace l-proline-producing Escherichia coli BL21(DE3) (21-S0). The genes responsible for by-product formation from l-proline, pyruvate, acetyl-CoA, and isocitrate in the biosynthetic network of 21-S0 were knocked out to channel the metabolic flux towards l-proline biosynthesis. PdhR was knocked out to remove its negative regulation and aceK was deleted to ensure isocitrate dehydrogenase's activity and to increase NADPH/NADP+ level. The other genes for l-proline biosynthesis were enhanced by integration of strong promoters and 5'-untranslated regions. The resulting engineered E. coli strains 21-S1 ∼ 21-S9 harboring a codon-optimized proline 4-hydroxylase-encoding gene (P4H) were grown and fermented. A titer of 4.82 g/L of t4HYP production in 21-S6 overexpressing P4H was obtained at conical flask level, comparing with the starting 21-S0 (26 mg/L). The present work paves an efficient metabolic engineering way for higher t4HYP production in E. coli.
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Affiliation(s)
- Liangzhen Jiang
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 Section 4, Renmin Road South, Chengdu 610041, People's Republic of China; College of Pharmacy and Biological Engineering, Chengdu University, 2025 Chengluo Avenue, Chengdu 610106, People's Republic of China
| | - Jing Pang
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 Section 4, Renmin Road South, Chengdu 610041, People's Republic of China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People's Republic of China
| | - Lixia Yang
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 Section 4, Renmin Road South, Chengdu 610041, People's Republic of China
| | - Wei Li
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 Section 4, Renmin Road South, Chengdu 610041, People's Republic of China
| | - Lili Duan
- College of Food Science and Technology, Sichuan Tourism University, 459 Hongling Road, Chengdu 610100, People's Republic of China
| | - Guolin Zhang
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 Section 4, Renmin Road South, Chengdu 610041, People's Republic of China
| | - Yinggang Luo
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, 9 Section 4, Renmin Road South, Chengdu 610041, People's Republic of China; State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China.
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3
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Yuan J, Xiong W, Zhou X, Zhang Y, Shi D, Li Z, Lu H. 4-Hydroxyproline-Derived Sustainable Polythioesters: Controlled Ring-Opening Polymerization, Complete Recyclability, and Facile Functionalization. J Am Chem Soc 2019; 141:4928-4935. [DOI: 10.1021/jacs.9b00031] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jingsong Yuan
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Wei Xiong
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Xuhao Zhou
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Yi Zhang
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Dong Shi
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Zichen Li
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
| | - Hua Lu
- Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People’s Republic of China
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4
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Feng S, Li J, He F, Li T, Li H, Wang X, Xie X, She X. A copper-catalyzed radical coupling/fragmentation reaction: efficient access to β-oxophosphine oxides. Org Chem Front 2019. [DOI: 10.1039/c9qo00006b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of a novel copper-catalyzed three-component radical coupling/fragmentation cascade reaction to generate diverse β-oxophosphine oxides is reported.
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Affiliation(s)
- Shangbiao Feng
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Jinlai Li
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Feifei He
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Tao Li
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry
- Department of Chemistry
- Lanzhou University
- Lanzhou
- China
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5
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Dunetz JR, Magano J, Weisenburger GA. Large-Scale Applications of Amide Coupling Reagents for the Synthesis of Pharmaceuticals. Org Process Res Dev 2016. [DOI: 10.1021/op500305s] [Citation(s) in RCA: 411] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Joshua R. Dunetz
- Process
Chemistry, Gilead Sciences, 333 Lakeside Drive, Foster City, California 94404, United States
| | - Javier Magano
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Gerald A. Weisenburger
- Chemical Research & Development, Pfizer Worldwide Research & Development, Eastern Point Road, Groton, Connecticut 06340, United States
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6
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Hua HL, Zhang BS, He YT, Qiu YF, Wu XX, Xu PF, Liang YM. Silver-Catalyzed Oxidative Cyclization of Propargylamide-Substituted Indoles: Synthesis of Phosphorated Indoloazepinones Derivatives. Org Lett 2015; 18:216-9. [DOI: 10.1021/acs.orglett.5b03329] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hui-Liang Hua
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Bo-Sheng Zhang
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yu-Tao He
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yi-Feng Qiu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xin-Xing Wu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied
Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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7
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Zhou ZZ, Jin DP, Li LH, He YT, Zhou PX, Yan XB, Liu XY, Liang YM. Silver-Promoted Oxidative Cyclization of 1,6-Enynes: Highly Regioselective Synthesis of Phosphorated Fluorene Derivatives. Org Lett 2014; 16:5616-9. [DOI: 10.1021/ol502397f] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhao-Zhao Zhou
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Dong-Po Jin
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Lian-Hua Li
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yu-Tao He
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ping-Xin Zhou
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xiao-Biao Yan
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xue-Yuan Liu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
- State
Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical
Physics, Chinese Academy of Science, Lanzhou 730000, P.R. China
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8
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Driver TG. Recent advances in transition metal-catalyzed N-atom transfer reactions of azides. Org Biomol Chem 2010; 8:3831-46. [PMID: 20617243 PMCID: PMC3095841 DOI: 10.1039/c005219c] [Citation(s) in RCA: 357] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal-catalyzed N-atom transfer reactions of azides provide efficient ways to construct new carbon-nitrogen and sulfur-nitrogen bonds. These reactions are inherently green: no additive besides catalyst is needed to form the nitrenoid reactive intermediate, and the by-product of the reaction is environmentally benign N(2) gas. As such, azides can be useful precursors for transition metal-catalyzed N-atom transfer to sulfides, olefins and C-H bonds. These methods offer competitive selectivities and comparable substrate scope as alternative processes to generate metal nitrenoids.
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Affiliation(s)
- Tom G Driver
- University of Illinois at Chicago, Department of Chemistry, 845 W. Taylor St., Chicago, IL 60607, USA
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9
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Morimoto M, Tamura K, Nagai K, Yashima E. Chirality sensing of chiral pyrrolidines and piperazines with a liquid crystalline dynamic helical poly(phenylacetylene) bearing ethyl phosphonate pendant groups. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23900] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Kumar Singh S, Singh GB, Byri VK, Satish B, Dhamjewar R, Gopalan B. Novel Synthesis of (3R,4R)‐4‐Acetoxy‐3‐[1′(R)‐tert‐butyldimethylsilyloxyethyl] Azetidin‐2‐one: A Key Intermediate for Penem and Carbapenem Synthesis. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910701651300] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - G. B. Singh
- a Matrix Laboratories Limited , Andhra Pradesh, India
| | - V. K. Byri
- a Matrix Laboratories Limited , Andhra Pradesh, India
| | - B. Satish
- a Matrix Laboratories Limited , Andhra Pradesh, India
| | | | - B. Gopalan
- a Matrix Laboratories Limited , Andhra Pradesh, India
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11
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von Nussbaum F, Brands M, Hinzen B, Weigand S, Häbich D. Antibacterial natural products in medicinal chemistry--exodus or revival? Angew Chem Int Ed Engl 2007; 45:5072-129. [PMID: 16881035 DOI: 10.1002/anie.200600350] [Citation(s) in RCA: 467] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
To create a drug, nature's blueprints often have to be improved through semisynthesis or total synthesis (chemical postevolution). Selected contributions from industrial and academic groups highlight the arduous but rewarding path from natural products to drugs. Principle modification types for natural products are discussed herein, such as decoration, substitution, and degradation. The biological, chemical, and socioeconomic environments of antibacterial research are dealt with in context. Natural products, many from soil organisms, have provided the majority of lead structures for marketed anti-infectives. Surprisingly, numerous "old" classes of antibacterial natural products have never been intensively explored by medicinal chemists. Nevertheless, research on antibacterial natural products is flagging. Apparently, the "old fashioned" natural products no longer fit into modern drug discovery. The handling of natural products is cumbersome, requiring nonstandardized workflows and extended timelines. Revisiting natural products with modern chemistry and target-finding tools from biology (reversed genomics) is one option for their revival.
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Affiliation(s)
- Franz von Nussbaum
- Bayer HealthCare AG, Medicinal Chemistry Europe, 42096 Wuppertal, Germany.
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12
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Sajonz P, Vailaya A, Sudah O, McPherson L, Capodanno V, Natishan TK, Helmy R, Antia FD. Development of a gradient elution preparative high performance liquid chromatography method for the recovery of the antibiotic ertapenem from crystallization process streams. J Chromatogr A 2006; 1126:365-72. [PMID: 16735042 DOI: 10.1016/j.chroma.2006.04.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Revised: 04/25/2006] [Accepted: 04/26/2006] [Indexed: 11/18/2022]
Abstract
A gradient elution preparative chromatography method was developed for the recovery of the antibiotic ertapenem from crystallization mother-liquor streams. The preparative HPLC method that was developed on the lab-scale employs an analytical size column of conventional dimensions (25 cm x 0.46 cm) packed with Kromasil C8 stationary phase. Gradient elution was used with aqueous acetic acid and acetonitrile as mobile phases. A target of processing approximately 30 mg of ertapenem per half an hour at a flow rate of 1.5 mL/min with high yield and adequate rejection of all major impurities was achieved. This corresponds to a productivity of approximately 0.6 kg ertapenem as free acid per kilogram of stationary phase per day (kkd). The scalability of the method was demonstrated by using a 5 cm i.d. column configuration to generate 10 g of purified ertapenem. This work complements a previous study improving on the productivity and throughput of the method by employing gradient elution and the use of crystallization to remove some key impurities that are chromatographically difficult to resolve [A. Vailaya, P. Sajonz, O. Sudah, V. Capodanno, R. Helmy, F.D. Antia, J. Chromatogr. A 1079 (2005) 80].
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Affiliation(s)
- Peter Sajonz
- Merck Research Laboratories, Merck & Co. Inc., Rahway, NJ 07065, USA.
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13
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von Nussbaum F, Brands M, Hinzen B, Weigand S, Häbich D. Antibakterielle Naturstoffe in der medizinischen Chemie – Exodus oder Renaissance? Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600350] [Citation(s) in RCA: 142] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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14
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Williams JM, Brands KMJ, Skerlj RT, Jobson RB, Marchesini G, Conrad KM, Pipik B, Savary KA, Tsay FR, Houghton PG, Sidler DR, Dolling UH, DiMichele LM, Novak TJ. Practical synthesis of the new carbapenem antibiotic ertapenem sodium. J Org Chem 2006; 70:7479-87. [PMID: 16149774 DOI: 10.1021/jo0501442] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A practical synthesis for the large-scale production of the new carbapenem antibiotic, [4R,5S,6S]-3-[[(3S,5S)-5-[[(3-Carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid monosodium salt (ertapenem sodium, 1), has been developed. The synthesis features the novel use of 1,1,3,3-tetramethylguanidine as base for the low-temperature reaction of a thiol, derived from trans-4-hydroxy-L-proline, with the carbapenem nucleus activated as the enol phosphate. Hydrogenolysis of a p-nitrobenzyl ester is effected using a palladium on carbon catalyst to give an overall yield for the two steps of 90%. The use of bicarbonate in the hydrogenolysis was key in providing protection of the pyrrolidine amine as the sodium carbamate improving both the performance of the reaction and the stability of the product. This discovery made processing at manufacturing scale possible. Experimental evidence for the formation of the sodium carbamate is provided. A remarkably expedient process for the simultaneous purification and concentration of the aqueous product stream relies on ion-pairing extraction for the removal of the water-soluble 1,1,3,3-tetramethylguanidine. Crystallization then affords 59-64% overall yield of the monosodium salt form of the product.
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Affiliation(s)
- J Michael Williams
- Department of Process Research, Merck Research Laboratories, Post Office Box 2000, Rahway, New Jersey 07065, USA.
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15
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Isoda T, Yamamura I, Tamai S, Kumagai T, Nagao Y. A Practical and Facile Synthesis of Azetidine Derivatives for Oral Carbapenem, L-084. Chem Pharm Bull (Tokyo) 2006; 54:1408-11. [PMID: 17015978 DOI: 10.1248/cpb.54.1408] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An orally active carbapenem L-084, which exhibits high bioavailability in humans, has a 1-(1,3-thiazolin-2-yl)azetidin-3-ylthio moiety at the C-2 position of the 1beta-methylcarbapenem skeleton. We established a practical and cost-effective synthesis of 3-mercapto-1-(1,3-thiazolin-2-yl)azetidine (1) for further scale-up production of L-084. This synthesis method entails an industry-oriented reaction of azetidine ring-closure to yield N-benzyl-3-hydroxyazetidine (16), which is eventually converted to 1 via key intermediates, Bunte salts 19 and 20.
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Affiliation(s)
- Takeshi Isoda
- Medical Research Laboratories, Wyeth K.K., Shiki, Saitama, Japan.
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16
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Vailaya A, Sajonz P, Sudah O, Capodanno V, Helmy R, Antia FD. Exploiting pH mismatch in preparative high-performance liquid chromatographic recovery of ertapenem from mother liquor streams. J Chromatogr A 2005; 1079:80-91. [PMID: 16038294 DOI: 10.1016/j.chroma.2005.04.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Preparative chromatography was successfully employed to recover ertapenem from mother liquor streams. The recovery process involved concentration of mother liquor stream by evaporation, purification by reversed-phase preparative high-performance liquid chromatography (HPLC), and removal of chromatographic solvents in the recovered fractions by evaporation. HPLC feed was prepared by stripping off the organic solvents from the mother liquor using a wiped-film evaporator. Purification was first carried out on a 25 cm x 0.46 cm analytical column packed with 10-microm Kromasil C8 particles and then scaled up to a 25 cm x 5 cm preparative column. Gram-level recovery of ertapenem with high purity was achieved by exploiting a novel approach based on pH mismatch between the feed and the eluent. Purified ertapenem streams from preparative HPLC runs were combined, evaporated and recycled into the crystallizer for ertapenem isolation.
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Affiliation(s)
- Anant Vailaya
- Analytical Research, Merck Research Laboratories, Merck & Co., Inc., RY818-C220, P.O. Box 2000, Rahway, NJ 07065-0900, USA.
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17
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Boyer-Joubert C, Lorthiois E, Moreau F. Chapter 33. To market, to market - 2002. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2003. [DOI: 10.1016/s0065-7743(03)38034-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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