1
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Yang L, Tan D, Fan W, Liu X, Wu J, Huang Z, Li Q, Wang H. Photochemical Radical C–H Halogenation of Benzyl N‐Methyliminodiacetyl (MIDA) Boronates: Synthesis of α‐Functionalized Alkyl Boronates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ling Yang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Dong‐Hang Tan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Wen‐Xin Fan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Xu‐Ge Liu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Jia‐Qiang Wu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Zhi‐Shu Huang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Qingjiang Li
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Honggen Wang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
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2
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Yang L, Tan D, Fan W, Liu X, Wu J, Huang Z, Li Q, Wang H. Photochemical Radical C–H Halogenation of Benzyl N‐Methyliminodiacetyl (MIDA) Boronates: Synthesis of α‐Functionalized Alkyl Boronates. Angew Chem Int Ed Engl 2020; 60:3454-3458. [DOI: 10.1002/anie.202011872] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/12/2020] [Indexed: 01/16/2023]
Affiliation(s)
- Ling Yang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Dong‐Hang Tan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Wen‐Xin Fan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Xu‐Ge Liu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Jia‐Qiang Wu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Zhi‐Shu Huang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Qingjiang Li
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
| | - Honggen Wang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 China
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3
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Introvigne ML, Taracila MA, Prati F, Caselli E, Bonomo RA. α-Triazolylboronic Acids: A Promising Scaffold for Effective Inhibitors of KPCs. ChemMedChem 2020; 15:1283-1288. [PMID: 32459878 PMCID: PMC8256004 DOI: 10.1002/cmdc.202000126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 05/25/2020] [Indexed: 11/07/2022]
Abstract
Boronic acids are known reversible covalent inhibitors of serine β-lactamases. The selectivity and high potency of specific boronates bearing an amide side chain that mimics the β-lactam's amide side chain have been advanced in several studies. Herein, we describe a new class of boronic acids in which the amide group is replaced by a bioisostere triazole. The boronic acids were obtained in a two-step synthesis that relies on the solid and versatile copper-catalyzed azide-alkyne cycloaddition (CuAAC) followed by boronate deprotection. All of the compounds show very good inhibition of the Klebsiella pneumoniae carbapenemase KPC-2, with Ki values ranging from 1 nM to 1 μM, and most of them are able to restore cefepime activity against K. pneumoniae harboring blaKPC-2 . In particular, compound 1 e, bearing a sulfonamide substituted by a thiophene ring, proved to be an excellent KPC-2 inhibitor (Ki =30 nM); it restored cefepime susceptibility in KPC-Kpn cells (MIC=0.5 μg/mL) with values similar to that of vaborbactam (Ki =20 nM, MIC in KPC-Kpn 0.5 μg/mL). Our findings suggest that α-triazolylboronates might represent an effective scaffold for the treatment of KPC-mediated infections.
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Affiliation(s)
- Maria Luisa Introvigne
- Clinical and Experimental Medicine PhD Programme, University of Modena and Reggio Emilia, via Università 4, 41121, Modena, Italy
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Magdalena A Taracila
- Departments of Medicine
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH 44106, USA
| | - Fabio Prati
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Emilia Caselli
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Robert A Bonomo
- Departments of Medicine
- Pharmacology, Biochemistry and Molecular Biology and Microbiology, Biochemistry, and Proteomics and Bioinformatics, Case Western Reserve University, 2109 Adelbert Rd., Cleveland, OH 44106, USA
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH 44106, USA
- CWRU-Cleveland VAMC Center for Antimicrobial Resistance and Epidemiology (Case VA CARES), Cleveland, OH 44106, USA
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4
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Caselli E, Fini F, Introvigne ML, Stucchi M, Taracila MA, Fish ER, Smolen KA, Rather PN, Powers RA, Wallar BJ, Bonomo RA, Prati F. 1,2,3-Triazolylmethaneboronate: A Structure Activity Relationship Study of a Class of β-Lactamase Inhibitors against Acinetobacter baumannii Cephalosporinase. ACS Infect Dis 2020; 6:1965-1975. [PMID: 32502340 PMCID: PMC7458062 DOI: 10.1021/acsinfecdis.0c00254] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Boronic acid transition state inhibitors (BATSIs) are known reversible covalent
inhibitors of serine β-lactamases. The selectivity and high potency of specific
BATSIs bearing an amide side chain mimicking the β-lactam’s amide side
chain are an established and recognized synthetic strategy. Herein, we describe a new
class of BATSIs where the amide group is replaced by a bioisostere triazole; these
compounds were designed as molecular probes. To this end, a library of 26
α-triazolylmethaneboronic acids was synthesized and tested against the clinically
concerning Acinetobacter-derived cephalosporinase, ADC-7. In steady
state analyses, these compounds demonstrated
Ki values ranging from 90 nM to 38
μM (±10%). Five compounds were crystallized in complex with ADC-7
β-lactamase, and all the crystal structures reveal the triazole is in the putative
amide binding site, thus confirming the triazole–amide bioisosterism. The easy
synthetic access of these new inhibitors as prototype scaffolds allows the insertion of
a wide range of chemical groups able to explore the enzyme binding site and provides
insights on the importance of specific residues in recognition and catalysis. The best
inhibitor identified, compound 6q
(Ki 90 nM), places a tolyl group near
Arg340, making favorable cation−π interactions. Notably, the structure of
6q does not resemble the natural substrate of the β-lactamase yet
displays a pronounced inhibition activity, in addition to lowering the minimum
inhibitory concentration (MIC) of ceftazidime against three bacterial strains expressing
class C β-lactamases. In summary, these observations validate the
α-triazolylboronic acids as a promising template for further inhibitor design.
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Affiliation(s)
- Emilia Caselli
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi 103, Modena 41125, Italy
| | - Francesco Fini
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi 103, Modena 41125, Italy
| | - Maria Luisa Introvigne
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi 103, Modena 41125, Italy
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, Modena 41125, Italy
| | - Mattia Stucchi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi 103, Modena 41125, Italy
| | - Magdalena A. Taracila
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Research Service, Cleveland, Ohio 44106, United States
- Department of Medicine, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Erin R. Fish
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Kali A. Smolen
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Philip N. Rather
- Department of Microbiology & Immunology, Emory University School of Medicine, Atlanta, Georgia 30322 United States
| | - Rachel A. Powers
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Bradley J. Wallar
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Robert A. Bonomo
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Research Service, Cleveland, Ohio 44106, United States
- Departments of Medicine, Pharmacology, Biochemistry and Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
- CWRU-Cleveland VAMC Center for Antimicrobial Resistance and Epidemiology (Case VA CARES), Cleveland, Ohio 44106, United States
| | - Fabio Prati
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi 103, Modena 41125, Italy
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5
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Grygorenko OO, Ivon YM. Heterocyclizations of α-heteroatom-substituted organoboronates (microreview). Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02641-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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6
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Bouza AA, Swanson HC, Smolen KA, VanDine AL, Taracila MA, Romagnoli C, Caselli E, Prati F, Bonomo RA, Powers RA, Wallar BJ. Structure-Based Analysis of Boronic Acids as Inhibitors of Acinetobacter-Derived Cephalosporinase-7, a Unique Class C β-Lactamase. ACS Infect Dis 2018; 4:325-336. [PMID: 29144724 DOI: 10.1021/acsinfecdis.7b00152] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Acinetobacter baumannii is a multidrug resistant pathogen that infects more than 12 000 patients each year in the US. Much of the resistance to β-lactam antibiotics in Acinetobacter spp. is mediated by class C β-lactamases known as Acinetobacter-derived cephalosporinases (ADCs). ADCs are unaffected by clinically used β-lactam-based β-lactamase inhibitors. In this study, five boronic acid transition state analog inhibitors (BATSIs) were evaluated for inhibition of the class C cephalosporinase ADC-7. Our goal was to explore the properties of BATSIs designed to probe the R1 binding site. Ki values ranged from low micromolar to subnanomolar, and circular dichroism (CD) demonstrated that each inhibitor stabilizes the β-lactamase-inhibitor complexes. Additionally, X-ray crystal structures of ADC-7 in complex with five inhibitors were determined (resolutions from 1.80 to 2.09 Å). In the ADC-7/CR192 complex, the BATSI with the lowest Ki (0.45 nM) and greatest Δ Tm (+9 °C), a trifluoromethyl substituent, interacts with Arg340. Arg340 is unique to ADCs and may play an important role in the inhibition of ADC-7. The ADC-7/BATSI complexes determined in this study shed light into the unique recognition sites in ADC enzymes and also offer insight into further structure-based optimization of these inhibitors.
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Affiliation(s)
- Alexandra A. Bouza
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Hollister C. Swanson
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Kali A. Smolen
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Alison L. VanDine
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Magdalena A. Taracila
- Research
Service, Louis Stokes Cleveland Department of Veterans Affairs Medical
Center, 10701 East Boulevard, Cleveland, Ohio 44106, United States
- Departments of Medicine, Pharmacology, Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Chiara Romagnoli
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125 Modena, Italy
| | - Emilia Caselli
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125 Modena, Italy
| | - Fabio Prati
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125 Modena, Italy
| | - Robert A. Bonomo
- Research
Service, Louis Stokes Cleveland Department of Veterans Affairs Medical
Center, 10701 East Boulevard, Cleveland, Ohio 44106, United States
- Departments of Medicine, Pharmacology, Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Rachel A. Powers
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Bradley J. Wallar
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
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7
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Abstract
This review describes available methods for the preparation of α-aminoboronic acids in their racemic or in their enantiopure form. Both, highly stereoselective syntheses and asymmetric procedures leading to the stereocontrolled generation of α-aminoboronic acid derivatives are included. The preparation of acyclic, carbocyclic and azacyclic α-aminoboronic acid derivatives is covered. Within each section, the different synthetic approaches have been classified according to the key bond which is formed to complete the α-aminoboronic acid skeleton.
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Affiliation(s)
- Patricia Andrés
- Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
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8
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Caselli E, Romagnoli C, Vahabi R, Taracila MA, Bonomo RA, Prati F. Click Chemistry in Lead Optimization of Boronic Acids as β-Lactamase Inhibitors. J Med Chem 2015; 58:5445-58. [PMID: 26102369 DOI: 10.1021/acs.jmedchem.5b00341] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Boronic acid transition-state inhibitors (BATSIs) represent one of the most promising classes of β-lactamase inhibitors. Here we describe a new class of BATSIs, namely, 1-amido-2-triazolylethaneboronic acids, which were synthesized by combining the asymmetric homologation of boronates with copper-catalyzed azide-alkyne cycloaddition for the stereoselective insertion of the amido group and the regioselective formation of the 1,4-disubstituted triazole, respectively. This synthetic pathway, which avoids intermediate purifications, proved to be flexible and efficient, affording in good yields a panel of 14 BATSIs bearing three different R1 amide side chains (acetamido, benzylamido, and 2-thienylacetamido) and several R substituents on the triazole. This small library was tested against two clinically relevant class C β-lactamases from Enterobacter spp. and Pseudomonas aeruginosa. The K(i) value of the best compound (13a) was as low as 4 nM with significant reduction of bacterial resistance to the combination of cefotaxime/13a.
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Affiliation(s)
- Emilia Caselli
- †Department of Life Science, University of Modena and Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Chiara Romagnoli
- †Department of Life Science, University of Modena and Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Roza Vahabi
- †Department of Life Science, University of Modena and Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Magdalena A Taracila
- §Departments of Medicine, Pharmacology, Biochemistry, and Molecular Biology and Microbiology, Case Western Reserve University, , Cleveland, Ohio 44106, United States
| | - Robert A Bonomo
- ‡Research Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio 44106, United States.,§Departments of Medicine, Pharmacology, Biochemistry, and Molecular Biology and Microbiology, Case Western Reserve University, , Cleveland, Ohio 44106, United States
| | - Fabio Prati
- †Department of Life Science, University of Modena and Reggio Emilia, via Campi 103, 41125 Modena, Italy
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