1
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Chen K, Liu L, Li J, Tian Z, Jin H, Zhang D. Engineering and finetuning expression of SerC for balanced metabolic flux in vitamin B 6 production. Synth Syst Biotechnol 2024; 9:388-398. [PMID: 38572022 PMCID: PMC10987848 DOI: 10.1016/j.synbio.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/23/2024] [Accepted: 03/09/2024] [Indexed: 04/05/2024] Open
Abstract
Vitamin B6 plays a crucial role in cellular metabolism and stress response, making it an essential component for growth in all known organisms. However, achieving efficient biosynthesis of vitamin B6 faces the challenge of maintaining a balanced distribution of metabolic flux between growth and production. In this study, our focus is on addressing this challenge through the engineering of phosphoserine aminotransferase (SerC) to resolve its redundancy and promiscuity. The enzyme SerC was semi-designed and screened based on sequences and predicted kcat values, respectively. Mutants and heterologous proteins showing potential were then fine-tuned to optimize the production of vitamin B6. The resulting strain enhances the production of vitamin B6, indicating that different fluxes are distributed to the biosynthesis pathway of serine and vitamin B6. This study presents a promising strategy to address the challenge posed by multifunctional enzymes, with significant implications for enhancing biochemical production through engineering processes.
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Affiliation(s)
- Kai Chen
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- National Center of Technology Innovation for Synthetic Biology, Tianjin, China
- Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Linxia Liu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- National Center of Technology Innovation for Synthetic Biology, Tianjin, China
- Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Jinlong Li
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhizhong Tian
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Hongxing Jin
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
| | - Dawei Zhang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- National Center of Technology Innovation for Synthetic Biology, Tianjin, China
- Key Laboratory of Engineering Biology for Low-Carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
- University of Chinese Academy of Sciences, Beijing, China
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2
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Shtyrlin YG, Petukhov AS, Strelnik AD, Shtyrlin NV, Iksanova AG, Pugachev MV, Pavelyev RS, Dzyurkevich MS, Garipov MR, Balakin KV. Chemistry of pyridoxine in drug design. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2504-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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3
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Zeynizadeh B, Zahmatkesh K. Mild and Convenient Method for Reduction of Aliphatic and Aromatic Carboxylic Acids and Anhydrides with (Pyridine)(Tetrahydroborato)Zinc Complex as a New Stable Ligand-Metal Tetrahydroborate Agent. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823403103174803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Structurally different aliphatic and aromatic carboxylic acids and anhydrides are efficiently reduced to their corresponding alcohols with a new modified zinc tetrahydroborate agent, (pyridine)(tetrahydroborato)zinc complex, [(Py)Zn(BH4)2], in refluxing THF.
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Affiliation(s)
- Behzad Zeynizadeh
- Department of Chemistry, Faculty of Sciences, Urmia University, Urmia 57159-165, Iran
| | - Karam Zahmatkesh
- Department of Chemistry, Faculty of Sciences, Urmia University, Urmia 57159-165, Iran
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4
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Synthesis of [ 13C₃]-B6 Vitamers Labelled at Three Consecutive Positions Starting from [ 13C₃]-Propionic Acid. MOLECULES (BASEL, SWITZERLAND) 2018; 23:molecules23092117. [PMID: 30142892 PMCID: PMC6225105 DOI: 10.3390/molecules23092117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 08/16/2018] [Accepted: 08/18/2018] [Indexed: 12/31/2022]
Abstract
[13C3]-labelled vitamers (PN, PL and PM) of the B6 group were prepared starting from [13C3]-propionic acid. [13C3]-PN was synthesized in ten linear steps with an overall yield of 17%. Hereby, higher alkyl homologues of involved esters showed a positive impact on the reaction outcome of the intermediates in the chosen synthetic route. Oxidation of [13C3]-PN to [13C3]-PL was undertaken using potassium permanganate and methylamine followed by acid hydrolysis of the imine derivative. [13C3]-PM could be prepared from the oxime derivative of [13C3]-PN by hydrogenation with palladium.
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5
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Rossa TA, Suveges NS, Sá MM, Cantillo D, Kappe CO. Continuous multistep synthesis of 2-(azidomethyl)oxazoles. Beilstein J Org Chem 2018. [PMID: 29520312 PMCID: PMC5827817 DOI: 10.3762/bjoc.14.36] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
An efficient three-step protocol was developed to produce 2-(azidomethyl)oxazoles from vinyl azides in a continuous-flow process. The general synthetic strategy involves a thermolysis of vinyl azides to generate azirines, which react with bromoacetyl bromide to provide 2-(bromomethyl)oxazoles. The latter compounds are versatile building blocks for nucleophilic displacement reactions as demonstrated by their subsequent treatment with NaN3 in aqueous medium to give azido oxazoles in good selectivity. Process integration enabled the synthesis of this useful moiety in short overall residence times (7 to 9 min) and in good overall yields.
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Affiliation(s)
- Thaís A Rossa
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, 8010 Graz, Austria.,Departamento de Quıímica, Universidade Federal de Santa Catarina, Florianópolis 88040-900, SC, Brazil
| | - Nícolas S Suveges
- Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil 22941-909
| | - Marcus M Sá
- Departamento de Quıímica, Universidade Federal de Santa Catarina, Florianópolis 88040-900, SC, Brazil
| | - David Cantillo
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, 8010 Graz, Austria.,Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, 8010 Graz, Austria
| | - C Oliver Kappe
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, 8010 Graz, Austria.,Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, 8010 Graz, Austria
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6
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Tanielyan SK, More SR, Augustine RL, Schmidt SR. Continuous Liquid-Phase Hydrogenation of 1,4-Butynediol to High-Purity 1,4-Butanediol over Particulate Raney Nickel Catalyst in a Fixed Bed Reactor. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.6b00375] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Setrak K. Tanielyan
- Center
for Applied Catalysis, Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
| | - Santosh R. More
- Center
for Applied Catalysis, Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
| | - Robert L. Augustine
- Center
for Applied Catalysis, Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States
| | - Stephen R. Schmidt
- W.R. Grace & Co.-Conn, 7500 Grace Drive, Columbia, Maryland 21044, United States
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7
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Selective reaction route in the construction of the pyrrolo[3,4-b]pyridin-5-one core from a variety of 5-aminooxazoles and maleic anhydride. A DFT study. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.099] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Synthesis of cyclic analogues of hexamethylenebis(3-pyridine)amide (HMBPA) in a one-pot process. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Zou Y, Shi X, Zhang G, Li Z, Jin C, Su W. Improved “Oxazole” Method for the Practical and Efficient Preparation of Pyridoxine Hydrochloride (Vitamin B6). Org Process Res Dev 2013. [DOI: 10.1021/op4001687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ye Zou
- Key
Laboratory for Green Pharmaceutical Technologies and Related Equipment
of Ministry of Education, College of Pharmaceutical
Sciences, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Xiangjun Shi
- Key
Laboratory for Green Pharmaceutical Technologies and Related Equipment
of Ministry of Education, College of Pharmaceutical
Sciences, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Genbao Zhang
- Jiangxi Tianxin Pharmaceutical Company Ltd., Leping 333300, People’s Republic of China
| | - Zhenhua Li
- Key
Laboratory for Green Pharmaceutical Technologies and Related Equipment
of Ministry of Education, College of Pharmaceutical
Sciences, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Can Jin
- Key
Laboratory for Green Pharmaceutical Technologies and Related Equipment
of Ministry of Education, College of Pharmaceutical
Sciences, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Weike Su
- Key
Laboratory for Green Pharmaceutical Technologies and Related Equipment
of Ministry of Education, College of Pharmaceutical
Sciences, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
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10
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Lehmann J, Alzieu T, Martin RE, Britton R. The Kondrat'eva reaction in flow: direct access to annulated pyridines. Org Lett 2013; 15:3550-3. [PMID: 23805911 DOI: 10.1021/ol4013525] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A continuous flow inverse-electron-demand Kondrat'eva reaction has been developed that provides direct access to cycloalka[c]pyridines from unactivated oxazoles and cycloalkenes. Annulated pyridines obtained by this one-step process are valuable scaffolds for medicinal chemistry.
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Affiliation(s)
- Johannes Lehmann
- F. Hoffmann-La Roche AG, pRED, Pharma Research & Early Development, Small Molecule Research, Medicinal Chemistry, Grenzacherstrasse 124, 4070 Basel, Switzerland
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11
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Sabot C, Oueis E, Brune X, Renard PY. Synthesis of polysubstituted 3-hydroxypyridines via the revisited hetero-Diels–Alder reaction of 5-alkoxyoxazoles with dienophiles. Chem Commun (Camb) 2012; 48:768-70. [PMID: 22117230 DOI: 10.1039/c1cc16562c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Cyrille Sabot
- Equipe de Chimie Bio-Organique, CNRS UMR 6014-COBRA & FR 3038, IRCOF, rue Lucien Tesnière, 76131 Mont-Saint-Aignan Cedex, France
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12
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Suárez-Moreno GV, González-Zamora E, Méndez F. Oxazole as an Electron-Deficient Diene in the Diels–Alder Reaction. Org Lett 2011; 13:6358-61. [PMID: 22074462 DOI: 10.1021/ol202648r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Galdina Vanessa Suárez-Moreno
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México, D.F. 09340, Mexico
| | - Eduardo González-Zamora
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México, D.F. 09340, Mexico
| | - Francisco Méndez
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México, D.F. 09340, Mexico
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13
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Lalli C, Bouma MJ, Bonne D, Masson G, Zhu J. Exploiting the divergent reactivity of α-isocyanoacetate: multicomponent synthesis of 5-alkoxyoxazoles and related heterocycles. Chemistry 2010; 17:880-9. [PMID: 21226103 DOI: 10.1002/chem.201002098] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Indexed: 11/09/2022]
Abstract
A novel multicomponent synthesis of 5-alkoxyoxazoles, based on a new reactivity profile of α-isocyanoacetates, is described. Thus, simply heating a solution of amine, aldehyde, and α-(EWG-phenyl)-α-isocyanoacetate or α-(4-pyridyl)-α-isocyanoacetate (EWG=electron-withdrawing group) in toluene provided 5-alkoxyoxazoles in good to excellent yields. Reaction of the 5-alkoxyoxazoles with various α,β-unsaturated acyl chlorides led to the formation of epoxytetrahydropyrrolo[3,4-b]pyridin-5-ones by a domino N-acylation/Diels-Alder cycloaddition sequence. Subsequent fragmentation under basic conditions provided 6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-5-ones. A four-component synthesis of the pyridin-5-one compounds, without isolation of the 5-alkoxyoxazole, was subsequently developed.
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Affiliation(s)
- Claudia Lalli
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
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14
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Selective Hydrogenation of 2-Butyne-1,4-diol to 1,4-Butanediol Over Particulate Raney® Nickel Catalysts. Top Catal 2010. [DOI: 10.1007/s11244-010-9550-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Mukherjee T, Hilmey DG, Begley TP. PLP catabolism: identification of the 2-(Acetamidomethylene)succinate hydrolase gene in Mesorhizobium loti MAFF303099. Biochemistry 2008; 47:6233-41. [PMID: 18476725 DOI: 10.1021/bi8004158] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The function of the mlr6787 gene from Mesorhizobium loti MAFF303099 has been identified. This gene encodes 2-(acetamidomethylene)succinate hydrolase, an enzyme involved in the catabolism of pyridoxal 5'-phosphate (vitamin B 6). This enzyme was overexpressed in Escherichia coli, purified to homogeneity, and characterized. 2-(Acetamidomethylene)succinate hydrolase catalyzes the hydrolysis of 2-(acetamidomethylene)succinate to yield succinic semialdehyde, acetic acid, carbon dioxide, and ammonia. The k cat and K M for this reaction were 0.6 s (-1) and 143 microM, respectively. The enzyme was shown to utilize the E isomer of 2-(acetamidomethylene)succinate.
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Affiliation(s)
- Tathagata Mukherjee
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
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16
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17
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18
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Berseneva VS, Bakulev VA, Dehaen W, Toppet S, Borovkova M. Reactions of malonthioamides and malonamidines with methyl acetylpyruvate as a one-step method to prepare 4-thio- and 4-aminopyrrolo[3,4-c]pyridines. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.03.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Bondock S. One-pot synthesis of pyridine derivatives via diels-alder reactions of 2,4-dimethyl-5-methoxyoxazole. HETEROATOM CHEMISTRY 2005. [DOI: 10.1002/hc.20064] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Burri KF. Tilcotil® Studies. Part 2. [4 + 2] Additions with Isothiazol-3(2H)-one 1,1-Dioxide. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19900730107] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Sandford G, Wilson I, Timperley CM. Diels–Alder reactions of trifluoromethyl alkenes with 5-ethoxyoxazoles: synthesis of trifluoromethylated pyridine derivatives. J Fluor Chem 2004. [DOI: 10.1016/j.jfluchem.2004.04.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Silane Reduction of 5-Hydroxy-6-methyl-pyridine-3,4-dicarboxylic Acid Diethyl Ester: Synthesis of Vitamin B6. Molecules 2003. [PMCID: PMC6146842 DOI: 10.3390/81200873] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Alternative methods for the synthesis of pyridoxine have been investigated. The key intermediate, 5-hydroxy-6-methyl-pyridine-3,4-dicarboxylic acid diethyl ester (5), was reduced with either a silane monomer (MeSiH(OEt)2) or a polysiloxane (polymethylhydrosiloxane, PMHS) to afford crude pyridoxine. An isolation technique utilizing a commercially available resin was devised, affording the desired product, vitamin B6, in an overall yield of 38-54 % and a purity of 76%.
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23
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Kübel B, Höfle G, Steglich W. Hetero Cope Rearrangements in the Cyclization of Allyl and Propargyl Esters ofN-Acyl Amino Acids to Oxazolin-5-ones. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/anie.197500581] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Janvier P, Sun X, Bienaymé H, Zhu J. Ammonium chloride-promoted four-component synthesis of pyrrolo[3,4-b]pyridin-5-one. J Am Chem Soc 2002; 124:2560-7. [PMID: 11890807 DOI: 10.1021/ja017563a] [Citation(s) in RCA: 188] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel multicomponent synthesis of 5-aminooxazole starting from simple and readily available inputs is described. Thus, simply heating a methanol solution of an aldehyde 3, an amine 4, and an alpha-isocyanoacetamide 5 provided the 5-aminooxazole (1) in good to excellent yield. The reaction of 1 with alpha,beta-unsaturated acyl chloride 13 lead to the formation of pyrrolo[3,4-b]pyridin-5-one (2) in a single operation. A triple domino sequence, acylation/IMDA/retro-Michael cycloreversion, is involved in this new scaffold-generating reaction. After the observation that ammonium chloride can significantly accelerate the oxazole formation in toluene, a one-pot four-component synthesis of 2 is developed.
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Affiliation(s)
- Pierre Janvier
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette, France
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25
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Lorsbach BA, Kurth MJ. Carbonminus signCarbon Bond Forming Solid-Phase Reactions. Chem Rev 1999; 99:1549-1582. [PMID: 11849002 DOI: 10.1021/cr970109y] [Citation(s) in RCA: 185] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Beth A. Lorsbach
- Department of Chemistry, University of California, Davis, California 95616
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26
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Quallich GJ, Makowski TW, Sanders AF, Urban FJ, Vazquez E. Synthesis of 1,2,3,4-Tetrahydroisoquinolines Containing Electron-Withdrawing Groups. J Org Chem 1998. [DOI: 10.1021/jo972184e] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- George J. Quallich
- Process Research and Development, Central Research Division, Pfizer Inc., Groton, Connecticut 06340
| | - Teresa W. Makowski
- Process Research and Development, Central Research Division, Pfizer Inc., Groton, Connecticut 06340
| | - Andrew F. Sanders
- Process Research and Development, Central Research Division, Pfizer Inc., Groton, Connecticut 06340
| | - Frank J. Urban
- Process Research and Development, Central Research Division, Pfizer Inc., Groton, Connecticut 06340
| | - Enrique Vazquez
- Process Research and Development, Central Research Division, Pfizer Inc., Groton, Connecticut 06340
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27
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Ohta Y, Onoshima M, Tamura M, Tanaka R, Morimoto Y, Kinoshita T, Yoshihara K. The birch reduction of heterocyclic compounds.III. Birch reduction-elimination reaction of 2- and 3-furancarboxylic acid derivatives. J Heterocycl Chem 1998. [DOI: 10.1002/jhet.5570350233] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Dudin AV, Agafonov NE, Zhulin VM. Reaction of acylisothiocyanates with 5-isopropoxy-4-methyloxazole. MENDELEEV COMMUNICATIONS 1998. [DOI: 10.1070/mc1998v008n01abeh000903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Reddy P, Bhat SV. Convenient synthesis of (1H)-isoindoles and cyclopenta[c]pyrrole skeletons. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)10429-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Pieper PA, Yang DY, Zhou HQ, Liu HW. 3-Deoxy-3-fluoropyridoxamine 5‘-Phosphate: Synthesis and Chemical and Biological Properties of a Coenzyme B6 Analog. J Am Chem Soc 1997. [DOI: 10.1021/ja9632668] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patricia A. Pieper
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Ding-yah Yang
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Hui-qiang Zhou
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Hung-wen Liu
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
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31
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Bandgar BP, Modhave RK, Wadgaonkar PP, Sande AR. Selective reduction of mixed anhydrides of carboxylic acids to alcohols using borohydride exchange resin (BER)–nickel acetate. ACTA ACUST UNITED AC 1996. [DOI: 10.1039/p19960001993] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Chapter 2 Application of diels-alder cycloaddition chemistry for heterocyclic synthesis. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/s0959-6380(06)80004-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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33
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34
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Ibata T, Suga H, Isogami Y, Tamura H, Shi X. Abnormal Diels–Alder Reaction of Oxazoles with 4-Phenyl-3H-1,2,4-triazole-3,5(4H)-dione and Diethyl Azodicarboxylate, and X-Ray Crystal Structure of an Adduct. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1992. [DOI: 10.1246/bcsj.65.2998] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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