1
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Lei T, Cheng YY, Han X, Zhou C, Yang B, Fan XW, Chen B, Tung CH, Wu LZ. Lewis Acid-Relayed Singlet Oxygen Reaction with Enamines: Selective Dimerization of Enamines to Pyrrolin-4-ones. J Am Chem Soc 2022; 144:16667-16675. [PMID: 36047993 DOI: 10.1021/jacs.2c07450] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Singlet oxygen (1O2)-mediated oxidation represents an attractive strategy for incorporation of oxygen atoms from air under mild and environmentally benign conditions. However, the 1O2 reaction with enamine suffers from fragmentation, leading to very unsuccessful transformation. Here, Lewis acid is introduced to intercept [2 + 2] or "ene" reaction intermediates of the 1O2 reaction and enables oxidative dimerization of enamines to produce pyrrolin-4-ones in good to excellent yields. Mechanistic studies reveal the formation of the imino ketone intermediate from the interaction of 1O2 and enamine, which is able to interact with Lewis acid, relaying the 1O2 reaction in enamine chemistry. For the first time, selective cross-dimerization of two different enamines is achieved. Due to the advantages of mild conditions, high chemoselectivity, and up to 99% yield, a promising strategy has been developed for synthesizing aza-heterocycles under ambient conditions, which can be further applied for the synthesis of imidazolone, quinoxaline, and highly functionalized imine.
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Affiliation(s)
- Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yuan-Yuan Cheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xu Han
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Bing Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xiu-Wei Fan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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2
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Liu Q, Batt DG, Weigelt CA, Yip S, Wu DR, Ruzanov M, Sack JS, Wang J, Yarde M, Li S, Shuster DJ, Xie JH, Sherry T, Obermeier MT, Fura A, Stefanski K, Cornelius G, Khandelwal P, Tino JA, Macor JE, Salter-Cid L, Denton R, Zhao Q, Dhar TGM. Novel Tricyclic Pyroglutamide Derivatives as Potent RORγt Inverse Agonists Identified using a Virtual Screening Approach. ACS Med Chem Lett 2020; 11:2510-2518. [PMID: 33335675 DOI: 10.1021/acsmedchemlett.0c00496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/03/2020] [Indexed: 12/16/2022] Open
Abstract
Employing a virtual screening approach, we identified the pyroglutamide moiety as a nonacid replacement for the cyclohexanecarboxylic acid group which, when coupled to our previously reported conformationally locked tricyclic core, provided potent and selective RORγt inverse agonists. Structure-activity relationship optimization of the pyroglutamide moiety led to the identification of compound 18 as a potent and selective RORγt inverse agonist, albeit with poor aqueous solubility. We took advantage of the tertiary carbinol group in 18 to synthesize a phosphate prodrug, which provided good solubility, excellent exposures in mouse PK studies, and significant efficacy in a mouse model of psoriasis.
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Affiliation(s)
- Qingjie Liu
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Douglas G. Batt
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Carolyn A. Weigelt
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Shiuhang Yip
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Dauh-Rurng Wu
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Max Ruzanov
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - John S. Sack
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Jinhong Wang
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Melissa Yarde
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Sha Li
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - David J. Shuster
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Jenny H. Xie
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Tara Sherry
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Mary T. Obermeier
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Aberra Fura
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Kevin Stefanski
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Georgia Cornelius
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Purnima Khandelwal
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Joseph A. Tino
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - John E. Macor
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Luisa Salter-Cid
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Rex Denton
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - Qihong Zhao
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
| | - T. G. Murali Dhar
- Research and Early Development, Bristol Myers Squibb Company, Princeton, New Jersey 08540-4000, United States
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3
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Zhang YX, Chen LY, Sun JT, Si CM, Wei BG. Gold-Catalyzed Addition–N-Boc Cleavage–Cyclization of N,O-Acetal with Ynamides for Construction of 6-(tert-Butyldimethylsilyl)oxy-tetrahydropyrrolo[1,2-c][1,3]oxazin-1-ones. J Org Chem 2020; 85:12603-12613. [DOI: 10.1021/acs.joc.0c01776] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yan-Xue Zhang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Ling-Yan Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Jian-Ting Sun
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
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4
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Lin YC, Ribaucourt A, Moazami Y, Pierce JG. Concise Synthesis and Antimicrobial Evaluation of the Guanidinium Alkaloid Batzelladine D: Development of a Stereodivergent Strategy. J Am Chem Soc 2020; 142:9850-9857. [PMID: 32396001 PMCID: PMC7685371 DOI: 10.1021/jacs.0c04091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Herein, we describe a stereodivergent route to (±)-batzelladine D (2), (+)-batzelladine D (2), (-)-batzelladine D (2), and a series of stereochemical analogues and explore their antimicrobial activity for the first time. The concise synthetic approach enables access to the natural products in a sequence of 8-12 steps from readily available building blocks. Highlights of the synthetic strategy include gram-scale preparation of a late stage intermediate, pinpoint stereocontrol around the tricyclic skeleton, and a modular strategy that enables analogue generation. A key bicyclic β-lactam intermediate not only serves as the key controlling element for pyrrolidine stereochemistry but also serves as a preactivated coupling partner to install the ester side chain. The stereocontrolled synthesis allowed for the investigation of the antimicrobial activity of batzelladine D, demonstrating promising activity that is more potent for non-natural stereoisomers.
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Affiliation(s)
- You-Chen Lin
- Department of Chemistry, College of Sciences, NC State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
- Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
| | - Aubert Ribaucourt
- Department of Chemistry, College of Sciences, NC State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Yasamin Moazami
- Department of Chemistry, College of Sciences, NC State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Joshua G Pierce
- Department of Chemistry, College of Sciences, NC State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
- Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
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5
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Hamed RB, Gomez-Castellanos JR, Henry L, Warhaut S, Claridge TDW, Schofield CJ. Biocatalytic production of bicyclic β-lactams with three contiguous chiral centres using engineered crotonases. Commun Chem 2019; 2. [PMID: 31157308 PMCID: PMC6542682 DOI: 10.1038/s42004-018-0106-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
There is a need to develop asymmetric routes to functionalised β-lactams, which remain the most important group of antibacterials. Here we describe biocatalytic and protein engineering studies concerning carbapenem biosynthesis enzymes, aiming to enable stereoselective production of functionalised carbapenams with three contiguous chiral centres. Structurally-guided substitutions of wildtype carboxymethylproline synthases enable tuning of their C-N and C-C bond forming capacity to produce 5-carboxymethylproline derivatives substituted at C-4 and C-6, from amino acid aldehyde and malonyl-CoA derivatives. Use of tandem enzyme incubations comprising an engineered carboxymethylproline synthase and an alkylmalonyl-CoA forming enzyme (i.e. malonyl-CoA synthetase or crotonyl-CoA carboxylase reductase) can improve stereocontrol and expand the product range. Some of the prepared 4,6-disubstituted-5-carboxymethylproline derivatives are converted to bicyclic β-lactams by carbapenam synthetase catalysis. The results illustrate the utility of tandem enzyme systems involving engineered crotonases for asymmetric bicyclic β-lactam synthesis. Beta-lactams are important antiobiotics but synthesising functionalised derivatives in high enantiomeric purity can be challenging. Here malonyl-CoA derivatives are applied in an enantioselective multi-enzyme cascade, yielding beta-lactams bearing three contiguous chiral centres in high diastereomeric purity.
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Affiliation(s)
- Refaat B Hamed
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - J Ruben Gomez-Castellanos
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Luc Henry
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Sven Warhaut
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Timothy D W Claridge
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Christopher J Schofield
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
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6
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Rabe P, Kamps JJAG, Schofield CJ, Lohans CT. Roles of 2-oxoglutarate oxygenases and isopenicillin N synthase in β-lactam biosynthesis. Nat Prod Rep 2018; 35:735-756. [PMID: 29808887 PMCID: PMC6097109 DOI: 10.1039/c8np00002f] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 01/01/2023]
Abstract
Covering: up to 2017 2-Oxoglutarate (2OG) dependent oxygenases and the homologous oxidase isopenicillin N synthase (IPNS) play crucial roles in the biosynthesis of β-lactam ring containing natural products. IPNS catalyses formation of the bicyclic penicillin nucleus from a tripeptide. 2OG oxygenases catalyse reactions that diversify the chemistry of β-lactams formed by both IPNS and non-oxidative enzymes. Reactions catalysed by the 2OG oxygenases of β-lactam biosynthesis not only involve their typical hydroxylation reactions, but also desaturation, epimerisation, rearrangement, and ring-forming reactions. Some of the enzymes involved in β-lactam biosynthesis exhibit remarkable substrate and product selectivities. We review the roles of 2OG oxygenases and IPNS in β-lactam biosynthesis, highlighting opportunities for application of knowledge of their roles, structures, and mechanisms.
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Affiliation(s)
- Patrick Rabe
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Jos J A G Kamps
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Christopher J Schofield
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Christopher T Lohans
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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7
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Lohans CT, Wang DY, Wang J, Hamed RB, Schofield CJ. Crotonases: Nature’s Exceedingly Convertible Catalysts. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01699] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Christopher T. Lohans
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - David Y. Wang
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Jimmy Wang
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Refaat B. Hamed
- Department
of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Christopher J. Schofield
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
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8
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β-Lactone formation during product release from a nonribosomal peptide synthetase. Nat Chem Biol 2017; 13:737-744. [PMID: 28504677 DOI: 10.1038/nchembio.2374] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 03/07/2017] [Indexed: 11/09/2022]
Abstract
Nonribosomal peptide synthetases (NRPSs) are multidomain modular biosynthetic assembly lines that polymerize amino acids into a myriad of biologically active nonribosomal peptides (NRPs). NRPS thioesterase (TE) domains employ diverse release strategies for off-loading thioester-tethered polymeric peptides from termination modules typically via hydrolysis, aminolysis, or cyclization to provide mature antibiotics as carboxylic acids/esters, amides, and lactams/lactones, respectively. Here we report the enzyme-catalyzed formation of a highly strained β-lactone ring during TE-mediated cyclization of a β-hydroxythioester to release the antibiotic obafluorin (Obi) from an NRPS assembly line. The Obi NRPS (ObiF) contains a type I TE domain with a rare catalytic cysteine residue that plays a direct role in β-lactone ring formation. We present a detailed genetic and biochemical characterization of the entire Obi biosynthetic gene cluster in plant-associated Pseudomonas fluorescens ATCC 39502 that establishes a general strategy for β-lactone biogenesis.
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9
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Hamed RB, Henry L, Claridge TDW, Schofield CJ. Stereoselective Production of Dimethyl-Substituted Carbapenams via Engineered Carbapenem Biosynthesis Enzymes. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02509] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Refaat B. Hamed
- Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
- Department
of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Luc Henry
- Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Timothy D. W. Claridge
- Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Christopher J. Schofield
- Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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10
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Gonzalez C, Kavoosi S, Sanchez A, Wnuk SF. Reduction of sugar lactones to hemiacetals with lithium triethylborohydride. Carbohydr Res 2016; 432:17-22. [PMID: 27341397 DOI: 10.1016/j.carres.2016.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 06/07/2016] [Accepted: 06/09/2016] [Indexed: 11/17/2022]
Abstract
Reduction of ribono-1,4-lactones and gulono-1,4-lactone as well as ribono-1,5-lactone and glucono-1,5-lactones with LTBH (1.2 equiv.) in CH2Cl2 at 0 °C for 30 min provided the corresponding pentose or hexose hemiacetals in high yields. Commonly used in carbohydrate chemistry protecting groups such as trityl, benzyl, silyl, acetals and to some extent acyls are compatible with this reduction.
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Affiliation(s)
- Cesar Gonzalez
- Department of Chemistry & Biochemistry, Florida International University, Miami, FL 33199, USA
| | - Sam Kavoosi
- Department of Chemistry & Biochemistry, Florida International University, Miami, FL 33199, USA
| | - Andersson Sanchez
- Department of Chemistry & Biochemistry, Florida International University, Miami, FL 33199, USA
| | - Stanislaw F Wnuk
- Department of Chemistry & Biochemistry, Florida International University, Miami, FL 33199, USA.
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11
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Kumar Y, Singh P, Bhargava G. Recent developments in the synthesis of condensed β-lactams. RSC Adv 2016. [DOI: 10.1039/c6ra20973d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
β-Lactams are important heterocycles with diverse pharmacological profiles and have emerged as useful organic synthons.
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Affiliation(s)
- Yogesh Kumar
- Department of Chemistry
- I. K. Gujral Punjab Technical University
- Kapurthala
- India
| | | | - Gaurav Bhargava
- Department of Chemistry
- I. K. Gujral Punjab Technical University
- Kapurthala
- India
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12
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Onwukwe GU, Koski MK, Pihko P, Schmitz W, Wierenga RK. Structures of yeast peroxisomal Δ(3),Δ(2)-enoyl-CoA isomerase complexed with acyl-CoA substrate analogues: the importance of hydrogen-bond networks for the reactivity of the catalytic base and the oxyanion hole. ACTA ACUST UNITED AC 2015; 71:2178-91. [PMID: 26527136 DOI: 10.1107/s139900471501559x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 08/19/2015] [Indexed: 11/10/2022]
Abstract
Δ(3),Δ(2)-Enoyl-CoA isomerases (ECIs) catalyze the shift of a double bond from 3Z- or 3E-enoyl-CoA to 2E-enoyl-CoA. ECIs are members of the crotonase superfamily. The crotonase framework is used by many enzymes to catalyze a wide range of reactions on acyl-CoA thioesters. The thioester O atom is bound in a conserved oxyanion hole. Here, the mode of binding of acyl-CoA substrate analogues to peroxisomal Saccharomyces cerevisiae ECI (ScECI2) is described. The best defined part of the bound acyl-CoA molecules is the 3',5'-diphosphate-adenosine moiety, which interacts with residues of loop 1 and loop 2, whereas the pantetheine part is the least well defined. The catalytic base, Glu158, is hydrogen-bonded to the Asn101 side chain and is further hydrogen-bonded to the side chain of Arg100 in the apo structure. Arg100 is completely buried in the apo structure and a conformational change of the Arg100 side chain appears to be important for substrate binding and catalysis. The oxyanion hole is formed by the NH groups of Ala70 (loop 2) and Leu126 (helix 3). The O atoms of the corresponding peptide units, Gly69 O and Gly125 O, are both part of extensive hydrogen-bond networks. These hydrogen-bond networks are a conserved feature of the crotonase oxyanion hole and their importance for catalysis is discussed.
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Affiliation(s)
- Goodluck U Onwukwe
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - M Kristian Koski
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Petri Pihko
- Department of Chemistry, University of Jyväskylä, Jyväskylä, Finland
| | - Werner Schmitz
- Department of Biochemistry and Molecular Biology, University of Würzburg, Biozentrum, Am Hubland, 97074 Würzburg, Germany
| | - Rik K Wierenga
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
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13
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Biocatalysts for the formation of three- to six-membered carbo- and heterocycles. Biotechnol Adv 2015; 33:457-80. [DOI: 10.1016/j.biotechadv.2015.01.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 01/27/2015] [Indexed: 11/18/2022]
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14
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Bouhlel A, Zhou D, Li A, Yuan L, Rich KM, McConathy J. Synthesis, Radiolabeling, and Biological Evaluation of (R)- and (S)-2-Amino-5-[(18)F]fluoro-2-methylpentanoic Acid ((R)-, (S)-[(18)F]FAMPe) as Potential Positron Emission Tomography Tracers for Brain Tumors. J Med Chem 2015; 58:3817-29. [PMID: 25843369 DOI: 10.1021/jm502023y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel (18)F-labeled α,α-disubstituted amino acid-based tracer, 2-amino-5-[(18)F]fluoro-2-methylpentanoic acid ([(18)F]FAMPe), has been developed for brain tumor imaging with a longer alkyl side chain than previously reported compounds to increase brain availability via system L amino acid transport. Both enantiomers of [(18)F]FAMPe were obtained in good radiochemical yield (24-52% n = 8) and high radiochemical purity (>99%). In vitro uptake assays in mouse DBT gliomas cells revealed that (S)-[(18)F]FAMPe enters cells partly via sodium-independent system L transporters and also via other nonsystem A transport systems including transporters that recognize glutamine. Biodistribution and small animal PET/CT studies in the mouse DBT model of glioblastoma showed that both (R)- and (S)-[(18)F]FAMPe have good tumor imaging properties with the (S)-enantiomer providing higher tumor uptake and tumor to brain ratios. Comparison of the SUVs showed that (S)-[(18)F]FAMPe had higher tumor to brain ratios compared to (S)-[(18)F]FET, a well-established system L substrate.
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Affiliation(s)
- Ahlem Bouhlel
- †Department of Radiology, and ‡Department of Neurosurgery, Washington University in Saint Louis, School of Medicine, St. Louis, Missouri 63110, United States
| | - Dong Zhou
- †Department of Radiology, and ‡Department of Neurosurgery, Washington University in Saint Louis, School of Medicine, St. Louis, Missouri 63110, United States
| | - Aixiao Li
- †Department of Radiology, and ‡Department of Neurosurgery, Washington University in Saint Louis, School of Medicine, St. Louis, Missouri 63110, United States
| | - Liya Yuan
- †Department of Radiology, and ‡Department of Neurosurgery, Washington University in Saint Louis, School of Medicine, St. Louis, Missouri 63110, United States
| | - Keith M Rich
- †Department of Radiology, and ‡Department of Neurosurgery, Washington University in Saint Louis, School of Medicine, St. Louis, Missouri 63110, United States
| | - Jonathan McConathy
- †Department of Radiology, and ‡Department of Neurosurgery, Washington University in Saint Louis, School of Medicine, St. Louis, Missouri 63110, United States
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15
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Onwukwe GU, Kursula P, Koski MK, Schmitz W, Wierenga RK. Human Δ3,Δ2-enoyl-CoA isomerase, type 2: a structural enzymology study on the catalytic role of its ACBP domain and helix-10. FEBS J 2015; 282:746-68. [DOI: 10.1111/febs.13179] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 12/10/2014] [Accepted: 12/12/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Goodluck U. Onwukwe
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine; University of Oulu; Finland
| | - Petri Kursula
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine; University of Oulu; Finland
- Department of Biomedicine; University of Bergen; Norway
| | - M. Kristian Koski
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine; University of Oulu; Finland
| | - Werner Schmitz
- Theodor Boveri Institute of Biosciences (Biocenter); University of Würzburg; Germany
| | - Rik K. Wierenga
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine; University of Oulu; Finland
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16
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Cele ZED, Arvidsson PI, Kruger HG, Govender T, Naicker T. Applied Enantioselective Aminocatalysis: α-Heteroatom Functionalization Reactions on the Carbapenem (β-Lactam Antibiotic) Core. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403238] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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17
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Chang WC, Guo Y, Wang C, Butch SE, Rosenzweig AC, Boal AK, Krebs C, Bollinger JM. Mechanism of the C5 stereoinversion reaction in the biosynthesis of carbapenem antibiotics. Science 2014; 343:1140-4. [PMID: 24604200 PMCID: PMC4160820 DOI: 10.1126/science.1248000] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The bicyclic β-lactam/2-pyrrolidine precursor to all carbapenem antibiotics is biosynthesized by attachment of a carboxymethylene unit to C5 of L-proline followed by β-lactam ring closure. Carbapenem synthase (CarC), an Fe(II) and 2-(oxo)glutarate (Fe/2OG)-dependent oxygenase, then inverts the C5 configuration. Here we report the structure of CarC in complex with its substrate and biophysical dissection of its reaction to reveal the stereoinversion mechanism. An Fe(IV)-oxo intermediate abstracts the hydrogen (H•) from C5, and tyrosine 165, a residue not visualized in the published structures of CarC lacking bound substrate, donates H• to the opposite face of the resultant radical. The reaction oxidizes the Fe(II) cofactor to Fe(III), limiting wild-type CarC to one turnover, but substitution of the H•-donating tyrosine disables stereoinversion and confers to CarC the capacity for catalytic substrate oxidation.
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Affiliation(s)
- Wei-chen Chang
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yisong Guo
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Chen Wang
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Susan E. Butch
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Amy C. Rosenzweig
- Department of Molecular Biosciences and Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Amie K. Boal
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Molecular Biosciences and Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Carsten Krebs
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - J. Martin Bollinger
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
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18
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Han MY, Wang HZ, An WK, Jia JY, Ma BC, Zhang Y, Wang W. A concise synthesis of L-pyrrolysine. Chemistry 2013; 19:8078-81. [PMID: 23649505 DOI: 10.1002/chem.201300403] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Indexed: 11/05/2022]
Abstract
Organocatalysis: A concise synthesis of L-pyrrolysine has been accomplished in six steps from simple starting materials. The facile synthetic strategy relies on an organocatalytic Michael addition, an efficient amide coupling, and a challenging method for the imine-bond construction.
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Affiliation(s)
- Man-Yi Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, PR China
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19
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Hamed RB, Henry L, Gomez-Castellanos JR, Asghar A, Brem J, Claridge TDW, Schofield CJ. Stereoselective preparation of lipidated carboxymethyl-proline/pipecolic acid derivatives via coupling of engineered crotonases with an alkylmalonyl-CoA synthetase. Org Biomol Chem 2013; 11:8191-6. [DOI: 10.1039/c3ob41525b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Hamed RB, Gomez-Castellanos JR, Henry L, Ducho C, McDonough MA, Schofield CJ. The enzymes of β-lactam biosynthesis. Nat Prod Rep 2013; 30:21-107. [DOI: 10.1039/c2np20065a] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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22
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Hammer SC, Dominicus JM, Syrén PO, Nestl BM, Hauer B. Stereoselective Friedel–Crafts alkylation catalyzed by squalene hopene cyclases. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.06.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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