1
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Selvaraj SP, Chen JY. Conjugation of antimicrobial peptides to enhance therapeutic efficacy. Eur J Med Chem 2023; 259:115680. [PMID: 37515922 DOI: 10.1016/j.ejmech.2023.115680] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/05/2023] [Accepted: 07/23/2023] [Indexed: 07/31/2023]
Abstract
The growing prevalence of antimicrobial resistance (AMR) has brought with it a continual increase in the numbers of deaths from multidrug-resistant (MDR) infections. Since the current arsenal of antibiotics has become increasingly ineffective, there exists an urgent need for discovery and development of novel antimicrobials. Antimicrobial peptides (AMPs) are considered to be a promising class of molecules due to their broad-spectrum activities and low resistance rates compared with other types of antibiotics. Since AMPs also often play major roles in elevating the host immune response, the molecules may also be called "host defense peptides." Despite the great promise of AMPs, the majority remain unsuitable for clinical use due to issues of structural instability, degradation by proteases, and/or toxicity to host cells. Moreover, AMP activities in vivo can be influenced by many factors, such as interaction with blood and serum biomolecules, physiological salt concentrations or different pH values. To overcome these limitations, structural modifications can be made to the AMP. Among several modifications, physical and chemical conjugation of AMP to other biomolecules is widely considered an effective strategy. In this review, we discuss structural modification strategies related to conjugation of AMPs and their possible effects on mode of action. The conjugation of fatty acids, glycans, antibiotics, photosensitizers, polymers, nucleic acids, nanoparticles, and immobilization to biomaterials are highlighted.
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Affiliation(s)
- Sanjay Prasad Selvaraj
- Molecular and Biological Agricultural Science Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan; Graduate Institute of Biotechnology, National Chung Hsing University, Taichung, 402, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10 Dahuen Rd, Jiaushi, Ilan, 262, Taiwan; The iEGG and Animal Biotechnology Center and the Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, 402, Taiwan.
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2
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Lee HJ, Choi ES, Maruoka K. Development of a catalytic ester activation protocol for the efficient formation of amide bonds using an Ar‐I/HF•pyridine/mCPBA system. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hyo-Jun Lee
- Kunsan National University Department of Chemistry KOREA, REPUBLIC OF
| | - Eun-Sol Choi
- Kunsan National University Department of Chemistry KOREA, REPUBLIC OF
| | - Keiji Maruoka
- Kyoto University Graduate School of Pharmaceutical Sciences Sakyo 606-8501 Kyoto JAPAN
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3
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Muramatsu W, Yamamoto H. An economical approach for peptide synthesis via regioselective C-N bond cleavage of lactams. Chem Sci 2022; 13:6309-6315. [PMID: 35733900 PMCID: PMC9159104 DOI: 10.1039/d2sc01466a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/21/2022] [Indexed: 11/21/2022] Open
Abstract
An economical, solvent-free, and metal-free method for peptide synthesis via C-N bond cleavage using lactams has been developed. The method not only eliminates the need for condensation agents and their auxiliaries, which are essential for conventional peptide synthesis, but also exhibits high atom economy. The reaction is versatile because it can tolerate side chains bearing a range of functional groups, affording up to >99% yields of the corresponding peptides without racemisation or polymerisation. Moreover, the developed strategy enables peptide segment coupling, providing access to a hexapeptide that occurs as a repeat sequence in spider silk proteins.
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Affiliation(s)
- Wataru Muramatsu
- Peptide Research Center, Chubu University 1200 Matsumoto-cho Kasugai Aichi 487-8501 Japan
| | - Hisashi Yamamoto
- Peptide Research Center, Chubu University 1200 Matsumoto-cho Kasugai Aichi 487-8501 Japan
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4
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Su J, Mo J, Chen X, Umanzor A, Zhang Z, Houk KN, Zhao J. Generation of Oxyphosphonium Ions by Photoredox/Cobaloxime Catalysis for Scalable Amide and Peptide Synthesis in Batch and Continuous‐Flow. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112668] [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)
- Junqi Su
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 P. R. China
| | - Jia‐Nan Mo
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 P. R. China
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Alexander Umanzor
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Zheng Zhang
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 P. R. China
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Jiannan Zhao
- Zhang Dayu School of Chemistry Dalian University of Technology Dalian 116024 P. R. China
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5
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Su J, Mo JN, Chen X, Umanzor A, Zhang Z, Houk KN, Zhao J. Generation of Oxyphosphonium Ions by Photoredox/Cobaloxime Catalysis for Scalable Amide and Peptide Synthesis in Batch and Continuous-Flow. Angew Chem Int Ed Engl 2021; 61:e202112668. [PMID: 34783121 DOI: 10.1002/anie.202112668] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/30/2021] [Indexed: 01/15/2023]
Abstract
Phosphine-mediated deoxygenative nucleophilic substitutions, such as the Mitsunobu reaction, are of great importance in organic synthesis. However, the conventional protocols require stoichiometric oxidants to trigger the formation of the oxyphosphonium intermediates for the subsequent nucleophilic additions. Through dual catalysis of photoredox and cobaloxime, we realized a radical strategy for the catalytic formation of acyloxyphosphonium ions that enables direct amidation. The deoxygenative protocol exhibits a broad scope and has been used in the late-stage amidation of drug molecules. In addition to batch reactions, a continuous-flow reactor was developed, enabling rapid peptide synthesis on gram scale. The successful assembly of a tetrapeptide on the solid support further demonstrated the versatility of this photocatalytic system. Moreover, experimental and computational studies are consistent with the hypothesis of acyloxyphosphonium ions being formed as the key intermediates.
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Affiliation(s)
- Junqi Su
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Jia-Nan Mo
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Alexander Umanzor
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Zheng Zhang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jiannan Zhao
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, P. R. China
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6
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Le Guen C, Dussouillez C, Kichler A, Chan-Seng D. Insertion of hydrophobic spacers on dodecalysines as potential transfection enhancers. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Muramatsu W, Hattori T, Yamamoto H. Amide bond formation: beyond the dilemma between activation and racemisation. Chem Commun (Camb) 2021; 57:6346-6359. [PMID: 34121110 DOI: 10.1039/d1cc01795k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of methods for amide bond formation without recourse to typical condensation reagents has become an emerging research area and has been actively explored in the past quarter century. Inspired by the structure of vitamin B12, we have developed a metal-templated macrolactamisation that generates a new wave towards classical macrolactam synthesis. Further, distinct from the extensively used methods with condensation reagents or catalysts based on catalyst/reagent control our metal-catalysed methods based on substrate control can effectively address long-standing challenges such as racemisation in the field of peptide chemistry. In addition, the substrate-controlled strategy demonstrates the feasibility of "remote" peptide bond-forming reaction catalysed by a metal-ligand complex. Moreover, an originally designed hydrosilane/aminosilane system can avoid not only racemisation but also unnecessary waste production. This feature article documents our discovery and application of our original approaches in amide bond formation.
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Affiliation(s)
- Wataru Muramatsu
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan.
| | - Tomohiro Hattori
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan.
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan.
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8
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Muramatsu W, Yamamoto H. Peptide Bond Formation of Amino Acids by Transient Masking with Silylating Reagents. J Am Chem Soc 2021; 143:6792-6797. [PMID: 33929829 DOI: 10.1021/jacs.1c02600] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A one-pot peptide bond-forming reaction has been developed using unprotected amino acids and peptides. Two different silylating reagents, HSi[OCH(CF3)2]3 and MTBSTFA, are instrumental for the successful implementation of this approach, being used for the activation and transient masking of unprotected amino acids and peptides at C-termini and N-termini, respectively. Furthermore, CsF and imidazole are used as catalysts, activating HSi[OCH(CF3)2]3 and also accelerating chemoselective silylation. This method is versatile as it tolerates side chains that bear a range of functional groups, while providing up to >99% yields of corresponding peptides without any racemization or polymerization.
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Affiliation(s)
- Wataru Muramatsu
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
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9
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Matsumoto A, Wang Z, Maruoka K. Radical-Mediated Activation of Esters with a Copper/Selectfluor System: Synthesis of Bulky Amides and Peptides. J Org Chem 2021; 86:5401-5411. [PMID: 33720721 DOI: 10.1021/acs.joc.1c00188] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we describe a new approach for the activation of esters via a radical-mediated process enabled by a copper/Selectfluor system. A variety of para-methoxybenzyl esters derived from bulky carboxylic acids and amino acids can be easily converted into the corresponding acyl fluorides, directly used in the one-pot synthesis of amides and peptides. As a proof of concept, this method was applied to the iterative formation of sterically hindered amide bonds.
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Affiliation(s)
- Akira Matsumoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Zhe Wang
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan.,School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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10
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Dolai G, Roy S, Sen S, Giri RS, Mandal B. Crystal structure of 1-(2,4,6-trichlorobenzoyloxy) benzotriazole (TCB-OBt): observation of uncommon intermolecular oxygen–oxygen interaction and synthetic application in amidation. NEW J CHEM 2021. [DOI: 10.1039/d1nj04048k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple active ester (TCB-OBt) has a significant hallmark in synthetic organic chemistry and materials science.
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Affiliation(s)
- Gobinda Dolai
- Department of Chemistry, Laboratory of Peptide and Amyloid Research, Indian Institute of Technology Guwahati, Assam-781039, India
| | - Sayanta Roy
- Department of Chemistry, Laboratory of Peptide and Amyloid Research, Indian Institute of Technology Guwahati, Assam-781039, India
| | - Srijit Sen
- Department of Chemistry, Laboratory of Peptide and Amyloid Research, Indian Institute of Technology Guwahati, Assam-781039, India
| | - Rajat Subhra Giri
- Department of Chemistry, Laboratory of Peptide and Amyloid Research, Indian Institute of Technology Guwahati, Assam-781039, India
| | - Bhubaneswar Mandal
- Department of Chemistry, Laboratory of Peptide and Amyloid Research, Indian Institute of Technology Guwahati, Assam-781039, India
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11
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Chen M, Yu X. tert-Butyloxycarbonyl-protected amino acid ionic liquids and their application to dipeptide synthesis. RSC Adv 2021; 11:27603-27606. [PMID: 35480639 PMCID: PMC9037786 DOI: 10.1039/d1ra05597f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 08/08/2021] [Indexed: 12/04/2022] Open
Abstract
Care should be taken when using amino acid ionic liquids (AAILs) for organic synthesis because of their multiple reactive groups. To expand the applicability of AAILs, we prepared a series of room-temperature ionic liquids derived from commercially available tert-butyloxycarbonyl-protected amino acids (Boc-AAILs). The resulting protected AAILs were used as the starting materials in dipeptide synthesis with commonly used coupling reagents. The distinctive coupling reagent N,N′-diethylene-N′′-2-chloroethyl thiophosphoramide was found to enhance amide formation in the Boc-AAILs without addition of base, giving the dipeptides in satisfactory yields in 15 min. Chemically protected amino acid ionic liquids are synthesized for the first time and employed as triple reactant/solvent/additives in a novel solid-phase peptide synthesis method.![]()
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Affiliation(s)
- Ming Chen
- School of Pharmacy, Yantai University, Qinqquan Road 30, Yantai 264005, China
| | - Xihan Yu
- College of Pharmacy, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China
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12
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Shukla P, Asati A, Bhardiya SR, Singh M, Rai VK, Rai A. Metal-free C-H Activation over Graphene Oxide toward Direct Syntheses of Structurally Different Amines and Amides in Water. J Org Chem 2020; 85:15552-15561. [PMID: 33146530 DOI: 10.1021/acs.joc.0c02219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Unprecedented metal-free synthesis of a variety of amines and amides is reported via amination of C(sp3)-H and C(sp2)-H bonds. The strategy involves graphene-oxide/I2-catalyzed nitrene insertion using PhINTs as a nitrene (NT) source in water at room temperature. A wide range of structurally different substrates, viz., cyclohexane, cyclic ethers, arenes, alkyl aromatic systems, and aldehydes/ketones, having an α-phenyl ring have been employed successfully to afford the corresponding nitrene insertion product in good yield, albeit low in few cases. The envisaged method has superiority over others in terms of its operational simplicity, metal-free catalysis, use of water as a solvent, ambient reaction conditions, and reusability of the catalyst.
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Affiliation(s)
- Prashant Shukla
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
| | - Ambika Asati
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh 495 009, India
| | - Smita R Bhardiya
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh 495 009, India
| | - Manorama Singh
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh 495 009, India
| | - Vijai K Rai
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh 495 009, India
| | - Ankita Rai
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
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13
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Muramatsu W, Manthena C, Nakashima E, Yamamoto H. Peptide Bond-Forming Reaction via Amino Acid Silyl Esters: New Catalytic Reactivity of an Aminosilane. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02512] [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)
- Wataru Muramatsu
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Chaitanya Manthena
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Erika Nakashima
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
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14
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Muramatsu W, Hattori T, Yamamoto H. Game Change from Reagent- to Substrate-Controlled Peptide Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200057] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Wataru Muramatsu
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Tomohiro Hattori
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
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15
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Sršan L, Ziegler T. Synthesis of new asparagine-based glycopeptides for future scanning tunneling microscopy investigations. Beilstein J Org Chem 2020; 16:888-894. [PMID: 32461770 PMCID: PMC7214877 DOI: 10.3762/bjoc.16.80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/21/2020] [Indexed: 12/22/2022] Open
Abstract
For investigations on the biological functions of oligosaccharides and peptidomimetics, new asparagine-based mono- and disaccharides containing glycopeptides were prepared in solution. The applicability of two common peptide coupling reagents, using an orthogonal Fmoc/t-Bu strategy along with acetyl protecting groups for the carbohydrate moiety, was studied. Thus, the prepared libraries of glycopeptides were designed as model systems of cell surfaces for future investigations by combined preparative mass spectroscopy and scanning tunneling microscopy (STM) using soft-landing electrospray beam deposition (ES-IBD), on metal surfaces.
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Affiliation(s)
- Laura Sršan
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Thomas Ziegler
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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16
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Beaumier EP, McGreal ME, Pancoast AR, Wilson RH, Moore JT, Graziano BJ, Goodpaster JD, Tonks IA. Carbodiimide Synthesis via Ti-Catalyzed Nitrene Transfer from Diazenes to Isocyanides. ACS Catal 2019; 9:11753-11762. [PMID: 34113477 DOI: 10.1021/acscatal.9b04107] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Simple Ti imido halide complexes such as [Br2Ti(N t Bu)py2]2 are competent catalysts for the synthesis of unsymmetrical carbodiimides via Ti-catalyzed nitrene transfer from diazenes or azides to isocyanides. Both alkyl and aryl isocyanides are compatible with the reaction conditions, although product inhibition with sterically unencumbered substrates sometimes limits the yield when diazenes are employed as the oxidant. The reaction mechanism has been investigated both experimentally and computationally, wherein a key feature is that the product release is triggered by electron transfer from an η 2-carbodiimide to a Ti-bound azobenzene. This ligand-to-ligand redox buffering obviates the need for high-energy formally TiII intermediates and provides further evidence that substrate and product "redox noninnocence" can promote unusual Ti redox catalytic transformations.
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Affiliation(s)
- Evan P. Beaumier
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Meghan E. McGreal
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Adam R. Pancoast
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - R. Hunter Wilson
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - James T. Moore
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Brendan J. Graziano
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jason D. Goodpaster
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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17
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Muramatsu W, Yamamoto H. Tantalum-Catalyzed Amidation of Amino Acid Homologues. J Am Chem Soc 2019; 141:18926-18931. [DOI: 10.1021/jacs.9b08415] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Wataru Muramatsu
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
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18
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Ghorpade SA, Sawant DN, Sekar N. Triphenyl borate catalyzed synthesis of amides from carboxylic acids and amines. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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19
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Potocny AM, Riley RS, O'Sullivan RK, Day ES, Rosenthal J. Photochemotherapeutic Properties of a Linear Tetrapyrrole Palladium(II) Complex displaying an Exceptionally High Phototoxicity Index. Inorg Chem 2018; 57:10608-10615. [PMID: 30132325 DOI: 10.1021/acs.inorgchem.8b01225] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Photodynamic therapy (PDT) represents a minimally invasive and highly localized treatment strategy to ablate tumors with few side effects. In PDT, photosensitizers embedded within tumors are activated by light and undergo intersystem crossing, followed by energy transfer to molecular oxygen, resulting in the production of toxic singlet oxygen (1O2). Previously, we reported a robust, linear tetrapyrrole palladium(II) complex, Pd[DMBil1], characterized by its facile and modular synthesis, broad absorption profile, and efficient 1O2 quantum yield of ΦΔ = 0.8 in organic media. However, the insolubility of this porphyrinoid derivative in aqueous solution prevents its use under biologically relevant conditions. In this work, we report the synthesis of Pd[DMBil1]-PEG750, a water-soluble dimethylbiladiene derivative that is appended with a poly(ethylene) glycol (PEG) functionality. Characterization of this complex shows that this PEGylated biladiene architecture maintains the attractive photophysical properties of the parent complex under biologically relevant conditions. More specifically, the absorption profile of Pd[DMBil1]-PEG750 closely matches that of Pd[DMBil1] and obeys the Beer-Lambert Law, suggesting that the complex does not aggregate under biologically relevant conditions. Additionally, the emission spectrum of Pd[DMBil1]-PEG750 retains the fluorescence and phosphorescence features characteristic of Pd[DMBil1]. Importantly, the PEGylated photosensitizer generates 1O2 with ΦΔ = 0.57, which is well within the range to warrant interrogation as a potential PDT agent for treatment of cancer cells. The Pd[DMBil1]-PEG750 is biologically compatible, as it is taken up by MDA-MB-231 triple negative breast cancer (TNBC) cells and has an effective dose (ED50) of only 0.354 μM when exposed to λex > 500 nm light for 30 min. Impressively, the lethal dose (LD50) of Pd[DMBil1]-PEG750 without light exposure was measured to be 1.87 mM, leading to a remarkably high phototoxicity index of ∼5300, which is vastly superior to existing photosensitizers that form the basis for clinical PDT treatments. Finally, through flow cytometry experiments, we show that PDT with Pd[DMBil1]-PEG750 induces primarily apoptotic cell death in MDA-MB-231 cells. Overall these results demonstrate that Pd[DMBil1]-PEG750 is an easily prepared, biologically compatible, and well-tolerated photochemotherapeutic agent that can efficiently drive the photoinduced apoptotic death of TNBC cells.
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Affiliation(s)
| | | | | | - Emily S Day
- Helen F. Graham Cancer Center and Research Institute , Newark , Delaware 19713 , United States
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20
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Chandra J, Manne SR, Mondal S, Mandal B. ( E)-Ethyl-2-cyano-2-(((2,4,6-trichlorobenzoyl)oxy)imino)acetate: A Modified Yamaguchi Reagent for Enantioselective Esterification, Thioesterification, Amidation, and Peptide Synthesis. ACS OMEGA 2018; 3:6120-6133. [PMID: 30023940 PMCID: PMC6044346 DOI: 10.1021/acsomega.8b00732] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 05/25/2018] [Indexed: 05/14/2023]
Abstract
Here, the synthesis and applications of (E)-ethyl-2-cyano-2-(((2,4,6-trichlorobenzoyl)oxy)imino)acetate as a racemization suppressing and easily recyclable version of the Yamaguchi reagent that can be used for amide and peptide synthesis are reported. We demonstrated its application in racemization-free esterification, thioesterification, amidation, and peptide bond formation. We successfully synthesized oligopeptides on the solid support in dimethylformamide as well as in solution (dichloromethane) by applying this coupling reagent. It is important to note that a mixed-anhydride-based method provides peptide-forming reactions as good as the current methods using built-in coupling reagents. Mechanism investigation, racemization suppression, and recyclability are also discussed.
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Affiliation(s)
- Jyoti Chandra
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Srinivasa Rao Manne
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Sandip Mondal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Bhubaneswar Mandal
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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21
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Albericio F, El-Faham A. Choosing the Right Coupling Reagent for Peptides: A Twenty-Five-Year Journey. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00159] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Fernando Albericio
- School of Chemistry and Physics, University of KwaZulu-Natal, University Road,
Westville, Durban 4001, South Africa
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Department of Organic Chemistry, University of Barcelona, Martí i Franqués 1-11, Barcelona 08028, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, Baldiri Reixac 10, Barcelona 08028, Spain
| | - Ayman El-Faham
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426,
Ibrahimia, Alexandria 21321, Egypt
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22
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Fraczyk J, Kaminski ZJ, Katarzynska J, Kolesinska B. 4-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium Toluene-4-sulfonate (DMT/NMM/TsO−
) Universal Coupling Reagent for Synthesis in Solution. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201700187] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Justyna Fraczyk
- Institute of Organic Chemistry; Lodz University of Technology; 90-924 Lodz Poland
| | - Zbigniew J. Kaminski
- Institute of Organic Chemistry; Lodz University of Technology; 90-924 Lodz Poland
| | - Joanna Katarzynska
- Institute of Organic Chemistry; Lodz University of Technology; 90-924 Lodz Poland
| | - Beata Kolesinska
- Institute of Organic Chemistry; Lodz University of Technology; 90-924 Lodz Poland
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23
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Kumar A, Jad YE, de la Torre BG, El-Faham A, Albericio F. Re-evaluating the stability of COMU in different solvents. J Pept Sci 2017; 23:763-768. [DOI: 10.1002/psc.3024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/05/2017] [Accepted: 06/14/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Ashish Kumar
- School of Chemistry and Physics; University of KwaZulu-Natal; Durban 4001 South Africa
- School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Yahya E. Jad
- School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Beatriz G. de la Torre
- School of Health Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
- School of Laboratory of Medicine and Medical Sciences; University of KwaZulu-Natal; Durban 4001 South Africa
| | - Ayman El-Faham
- Department of Chemistry, College of Science; King Saud University; PO Box 2455 Riyadh 11451 Saudi Arabia
- Chemistry Department, Faculty of Science; Alexandria University; PO Box 426, Ibrahimia 12321 Alexandria Egypt
| | - Fernando Albericio
- School of Chemistry and Physics; University of KwaZulu-Natal; Durban 4001 South Africa
- Department of Chemistry, College of Science; King Saud University; PO Box 2455 Riyadh 11451 Saudi Arabia
- Department of Organic Chemistry; University of Barcelona; 08028 Barcelona Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine; Barcelona Science Park; Barcelona 08028 Spain
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24
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de Figueiredo RM, Suppo JS, Midrier C, Campagne JM. Sequential One-Pot Synthesis of Dipeptides through the Transient Formation of CDI-N
-Protected α-Aminoesters. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Renata Marcia de Figueiredo
- Institut Charles Gerhardt Montpellier; UMR 5253 CNRS-UM-ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier Cedex 5 France
| | - Jean-Simon Suppo
- Institut Charles Gerhardt Montpellier; UMR 5253 CNRS-UM-ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier Cedex 5 France
| | - Camille Midrier
- Institut Charles Gerhardt Montpellier; UMR 5253 CNRS-UM-ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier Cedex 5 France
| | - Jean-Marc Campagne
- Institut Charles Gerhardt Montpellier; UMR 5253 CNRS-UM-ENSCM; Ecole Nationale Supérieure de Chimie de Montpellier; 8 Rue de l'Ecole Normale 34296 Montpellier Cedex 5 France
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25
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Aspin SJ, Taillemaud S, Cyr P, Charette AB. 9-Silafluorenyl Dichlorides as Chemically Ligating Coupling Agents and Their Application in Peptide Synthesis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606120] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Samuel J. Aspin
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
| | - Sylvain Taillemaud
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
| | - Patrick Cyr
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
| | - André B. Charette
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
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26
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Aspin SJ, Taillemaud S, Cyr P, Charette AB. 9-Silafluorenyl Dichlorides as Chemically Ligating Coupling Agents and Their Application in Peptide Synthesis. Angew Chem Int Ed Engl 2016; 55:13833-13837. [DOI: 10.1002/anie.201606120] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/18/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Samuel J. Aspin
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
| | - Sylvain Taillemaud
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
| | - Patrick Cyr
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
| | - André B. Charette
- Centre in Green Chemistry and Catalysis; Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128, Station Downtown Montreal Québec H3C 3J7 Canada
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Abstract
The present review offers an overview of nonclassical (e.g., with no pre- or in situ activation of a carboxylic acid partner) approaches for the construction of amide bonds. The review aims to comprehensively discuss relevant work, which was mainly done in the field in the last 20 years. Organization of the data follows a subdivision according to substrate classes: catalytic direct formation of amides from carboxylic and amines ( section 2 ); the use of carboxylic acid surrogates ( section 3 ); and the use of amine surrogates ( section 4 ). The ligation strategies (NCL, Staudinger, KAHA, KATs, etc.) that could involve both carboxylic acid and amine surrogates are treated separately in section 5 .
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Affiliation(s)
- Renata Marcia de Figueiredo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Simon Suppo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Marc Campagne
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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28
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Yousif M, Tjapkes DJ, Lord RL, Groysman S. Catalytic Formation of Asymmetric Carbodiimides at Mononuclear Chromium(II/IV) Bis(alkoxide) Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00703] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maryam Yousif
- Department
of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Daniel J. Tjapkes
- Department
of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Richard L. Lord
- Department
of Chemistry, Grand Valley State University, Allendale, Michigan 49401, United States
| | - Stanislav Groysman
- Department
of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
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29
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Rai VK, Sahu GP, Rai A. The first NHC-induced regioselective introduction of C- and N-nucleophiles in to Baylis–Hillman enals. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Shirokane K, Tanaka Y, Yoritate M, Takayama N, Sato T, Chida N. Total Syntheses of (±)-Gephyrotoxin and (±)-Perhydrogephyrotoxin. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20140398] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kenji Shirokane
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
| | - Yuya Tanaka
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
| | - Makoto Yoritate
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
| | - Nobuaki Takayama
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
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31
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Villanueva ME, Salinas A, González JA, Teves S, Copello GJ. Dual antibacterial effect of immobilized quaternary ammonium and aliphatic groups on PVC. NEW J CHEM 2015. [DOI: 10.1039/c5nj01766a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quaternary ammonium salts and lipophilic moieties were separately immobilized onto PVC to obtain a broad spectrum antimicrobial coating.
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Affiliation(s)
- María Emilia Villanueva
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| | - Ana Salinas
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| | - Joaquín Antonio González
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| | - Sergio Teves
- Cátedra de Microbiología
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- C1113AAD Ciudad de Buenos Aires
- Argentina
| | - Guillermo Javier Copello
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
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32
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de Meijere A, Kozhushkov SI, Yufit DS, Grosse C, Kaiser M, Raev VA. (2R,1'S,2'R)- and (2S,1'S,2'R)-3-[2-Mono(di,tri)fluoromethylcyclopropyl]alanines and their incorporation into hormaomycin analogues. Beilstein J Org Chem 2014; 10:2844-57. [PMID: 25550751 PMCID: PMC4273223 DOI: 10.3762/bjoc.10.302] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 11/18/2014] [Indexed: 11/23/2022] Open
Abstract
Efficient and scalable syntheses of enantiomerically pure (2R,1'S,2'R)- and (2S,1'S,2'R)-3-[2-mono(di,tri)fluoromethylcyclopropyl]alanines 9a–c, as well as allo-D-threonine (4) and (2S,3R)-β-methylphenylalanine (3), using the Belokon' approach with (S)- and (R)-2-[(N-benzylprolyl)amino]benzophenone [(S)- and (R)-10] as reusable chiral auxiliaries have been developed. Three new fluoromethyl analogues of the naturally occurring octadepsipeptide hormaomycin (1) with (fluoromethylcyclopropyl)alanine moieties have been synthesized and subjected to preliminary tests of their antibiotic activity.
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Affiliation(s)
- Armin de Meijere
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Sergei I Kozhushkov
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Dmitrii S Yufit
- Department of Chemistry, University of Durham, South Rd., Durham DH1 3L, UK
| | - Christian Grosse
- Institut für Anorganische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, Parasite Chemotherapy, Socinstrasse 57, CH-4002 Basel, Switzerland ; University of Basel, Petersplatz, 1 CH-4003 Basel Switzerland
| | - Vitaly A Raev
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany ; Institut für Organische Chemie der TU Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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33
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Kolesinska B, Rozniakowski KK, Fraczyk J, Relich I, Papini AM, Kaminski ZJ. The Effect of Counterion and Tertiary Amine on the Efficiency ofN-Triazinylammonium Sulfonates in Solution and Solid-Phase Peptide Synthesis. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402862] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Jad YE, Khattab SN, de la Torre BG, Govender T, Kruger HG, El-Faham A, Albericio F. TOMBU and COMBU as Novel Uronium-type peptide coupling reagents derived from Oxyma-B. Molecules 2014; 19:18953-65. [PMID: 25412042 PMCID: PMC6271478 DOI: 10.3390/molecules191118953] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 10/19/2014] [Accepted: 11/05/2014] [Indexed: 11/16/2022] Open
Abstract
Here we describe two novel uronium salts, TOMBU and COMBU, derived from the recently described Oxyma-B for use in peptide bond synthesis. These coupling reagents are more stable than COMU in DMF. Furthermore, using various peptide synthetic models in solution and solid-phase synthesis, we reveal that they show better performance than HBTU in terms of preserving chiral integrity and coupling yields, but slightly worse performance than COMU.
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Affiliation(s)
- Yahya E Jad
- Catalysis and Peptide Research Unit, School of Health Sciences, University of Kwazulu-Natal, Durban 4001, South Africa.
| | - Sherine N Khattab
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| | - Beatriz G de la Torre
- Catalysis and Peptide Research Unit, School of Health Sciences, University of Kwazulu-Natal, Durban 4001, South Africa.
| | - Thavendran Govender
- Catalysis and Peptide Research Unit, School of Health Sciences, University of Kwazulu-Natal, Durban 4001, South Africa.
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, School of Health Sciences, University of Kwazulu-Natal, Durban 4001, South Africa.
| | - Ayman El-Faham
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
| | - Fernando Albericio
- Catalysis and Peptide Research Unit, School of Health Sciences, University of Kwazulu-Natal, Durban 4001, South Africa.
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35
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Nakajima M, Oda Y, Wada T, Minamikawa R, Shirokane K, Sato T, Chida N. Chemoselective reductive nucleophilic addition to tertiary amides, secondary amides, and N-methoxyamides. Chemistry 2014; 20:17565-71. [PMID: 25345400 DOI: 10.1002/chem.201404648] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Indexed: 12/26/2022]
Abstract
As the complexity of targeted molecules increases in modern organic synthesis, chemoselectivity is recognized as an important factor in the development of new methodologies. Chemoselective nucleophilic addition to amide carbonyl centers is a challenge because classical methods require harsh reaction conditions to overcome the poor electrophilicity of the amide carbonyl group. We have successfully developed a reductive nucleophilic addition of mild nucleophiles to tertiary amides, secondary amides, and N-methoxyamides that uses the Schwartz reagent [Cp2 ZrHCl]. The reaction took place in a highly chemoselective fashion in the presence of a variety of sensitive functional groups, such as methyl esters, which conventionally require protection prior to nucleophilic addition. The reaction will be applicable to the concise synthesis of complex natural alkaloids from readily available amide groups.
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Affiliation(s)
- Minami Nakajima
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522 (Japan), Fax: (+81) 45-566-1551
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36
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Salman SM, Heidelberg T, Hussen RSD, Tajuddin HAB. Amide-Based Surfactants from Methyl Glucoside as Potential Emulsifiers. J SURFACTANTS DETERG 2014. [DOI: 10.1007/s11743-014-1628-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Suppo JS, Subra G, Bergès M, Marcia de Figueiredo R, Campagne JM. Inverse Peptide Synthesis via Activated α-Aminoesters. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402147] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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38
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Suppo JS, Subra G, Bergès M, Marcia de Figueiredo R, Campagne JM. Inverse Peptide Synthesis via Activated α-Aminoesters. Angew Chem Int Ed Engl 2014; 53:5389-93. [DOI: 10.1002/anie.201402147] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Indexed: 12/21/2022]
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39
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Jad YE, Khattab SN, de la Torre BG, Govender T, Kruger HG, El-Faham A, Albericio F. Oxyma-B, an excellent racemization suppressor for peptide synthesis. Org Biomol Chem 2014; 12:8379-85. [DOI: 10.1039/c4ob01612b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxyma-B, a superb additive for the control of optical purity during the synthesis of peptides.
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Affiliation(s)
- Yahya E. Jad
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of Kwazulu-Natal
- Durban 4001, South Africa
| | - Sherine N. Khattab
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria 21321, Egypt
| | - Beatriz G. de la Torre
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of Kwazulu-Natal
- Durban 4001, South Africa
- School of Chemistry
| | - Thavendran Govender
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of Kwazulu-Natal
- Durban 4001, South Africa
| | - Hendrik G. Kruger
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of Kwazulu-Natal
- Durban 4001, South Africa
| | - Ayman El-Faham
- Department of Chemistry
- Faculty of Science
- Alexandria University
- Alexandria 21321, Egypt
- Department of Chemistry
| | - Fernando Albericio
- Catalysis and Peptide Research Unit
- School of Health Sciences
- University of Kwazulu-Natal
- Durban 4001, South Africa
- School of Chemistry
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40
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Manca ML, Cassano R, Valenti D, Trombino S, Ferrarelli T, Picci N, Fadda AM, Manconi M. Isoniazid-gelatin conjugate microparticles containing rifampicin for the treatment of tuberculosis. J Pharm Pharmacol 2013; 65:1302-11. [DOI: 10.1111/jphp.12094] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 05/24/2013] [Indexed: 11/30/2022]
Abstract
Abstract
Objectives
In this work, a new polymeric microparticle system based on gelatin covalently bound to isoniazid (ISN) and containing rifampicin (RFP) was prepared by spray-drying technique. Microparticle aptitude to nebulisation and their capability of interacting with A549, alveolar basal epithelial cells, were evaluated in vitro.
Methods
Microparticles were obtained by spray drying, and their morphology, size, zeta potential, thermotropic behaviour and nebulisation ability were evaluated.
Key findings
Microparticles were positively charged with a mean size of 4.88 ± 0.3 μm. Microspheres were able to incorporate both RFP and ISN: encapsulation efficiency was 51 ± 6% and 22 ± 1%, respectively. X-ray diffraction study showed a new extensive and flattened diffraction peak providing evidence that the drugs were dispersed into the microparticles. Differential scanning calorimetry analysis confirmed effective interactions between gelatin and drug molecules by the presence of new transition peaks. Fifty-nine per cent of used microparticles were aerosolised. In-vitro toxicity studies on A549 alveolar basal epithelial cells showed that microparticles decreased cytotoxicity in comparison with the RFP solution. Laser scanning confocal microscopy observation confirmed that fluorescent probes delivered by microparticles are efficiently internalised in A549 cells.
Conclusions
Overall, microparticles based on gelatin covalently bound to ISN and containing RFP showed a promising behaviour for pulmonary drug delivery.
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Affiliation(s)
- Maria L Manca
- Department Scienze della Vita e dell'Ambiente, Sezione Scienze del Farmaco, Cagliari, Italy
| | - Roberta Cassano
- Department Scienze Farmaceutiche, Via P. Bucci, Arcavacata di Rende (CS), Italy
| | - Donatella Valenti
- Department Scienze della Vita e dell'Ambiente, Sezione Scienze del Farmaco, Cagliari, Italy
| | - Sonia Trombino
- Department Scienze Farmaceutiche, Via P. Bucci, Arcavacata di Rende (CS), Italy
| | - Teresa Ferrarelli
- Department Scienze Farmaceutiche, Via P. Bucci, Arcavacata di Rende (CS), Italy
| | - Nevio Picci
- Department Scienze Farmaceutiche, Via P. Bucci, Arcavacata di Rende (CS), Italy
| | - Anna M Fadda
- Department Scienze della Vita e dell'Ambiente, Sezione Scienze del Farmaco, Cagliari, Italy
| | - Maria Manconi
- Department Scienze della Vita e dell'Ambiente, Sezione Scienze del Farmaco, Cagliari, Italy
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Abstract
AbstractTertiary phosphines in reaction with 2-chloro-4,6-dialkoxy-1,3,5-triazines gave unstable quaternary P-triazinylphosphonium chlorides, which readily decomposed with a departure of the alkyl group of the triazine ring substituent. Stable quaternary P-triazinylphosphonium chlorides were obtained only in reaction of 2-chloro-4,6-diphenoxy-1,3,5-triazine. Both, stable quaternary P-triazinylphosphonium chlorides as well unstable analogues prepared in situ activated carboxylic acid yielding “superactive” triazine esters, useful as highly efficient reagents in peptide bond synthesis.
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Thalluri K, Nadimpally KC, Chakravarty MP, Paul A, Mandal B. Ethyl 2-(tert-Butoxycarbonyloxyimino)-2-cyanoacetate (Boc-Oxyma) as Coupling Reagent for Racemization-Free Esterification, Thioesterification, Amidation and Peptide Synthesis. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200645] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Rai VK, Sharma R, Kumar A. Masked amino acid: a new C-nucleophile for I2-catalyzed stereoselective ring opening of epoxides in ionic liquid. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Yanagita Y, Nakamura H, Shirokane K, Kurosaki Y, Sato T, Chida N. Direct nucleophilic addition to N-alkoxyamides. Chemistry 2012; 19:678-84. [PMID: 23165728 DOI: 10.1002/chem.201202639] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 10/02/2012] [Indexed: 11/06/2022]
Abstract
While the synthesis of amide bonds is now one of the most reliable organic reactions, functionalization of amide carbonyl groups has been a long-standing issue due to their high stability. As an ongoing program aimed at practical transformation of amides, we developed a direct nucleophilic addition to N-alkoxyamides to access multisubstituted amines. The reaction enabled installation of two different functional groups to amide carbonyl groups in one pot. The N-alkoxy group played important roles in this reaction. First, it removed the requirement for an extra preactivation step prior to nucleophilic addition to activate inert amide carbonyl groups. Second, the N-alkoxy group formed a five-membered chelated complex after the first nucleophilic addition, resulting in suppression of an extra addition of the first nucleophile. While diisobutylaluminum hydride (DIBAL-H) and organolithium reagents were suitable as the first nucleophile, allylation, cyanation, and vinylation were possible in the second addition including inter- and intramolecular reactions. The yields were generally high, even in the synthesis of sterically hindered α-trisubstituted amines. The reaction exhibited wide substrate scope, including acyclic amides, five- and six-membered lactams, and macrolactams.
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Affiliation(s)
- Yuta Yanagita
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Yokohama 223-8522, Japan
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45
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Sergeev ME, Voyushina TL, Sergeeva OA, Belozerskaya GG. Efficient enzyme-catalyzed synthesis of peptide secondary amides for use as serine proteinase inhibitors. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.04.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Collagen α-tocopherulate for topical applications: Preparation, characterization, and antioxidant activity evaluation. Macromol Res 2012. [DOI: 10.1007/s13233-012-0129-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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47
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Al-Warhi TI, Al-Hazimi HM, El-Faham A. Recent development in peptide coupling reagents. JOURNAL OF SAUDI CHEMICAL SOCIETY 2012. [DOI: 10.1016/j.jscs.2010.12.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Taylor JE, Jones MD, Williams JMJ, Bull SD. N-Acyl DBN Tetraphenylborate Salts as N-Acylating Agents. J Org Chem 2012; 77:2808-18. [DOI: 10.1021/jo202647f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James E. Taylor
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Matthew D. Jones
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | | | - Steven D. Bull
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
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49
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Cassano R, Trombino S, Ferrarelli T, Cavalcanti P, Giraldi C, Lai F, Loy G, Picci N. Synthesis, characterization and in-vitro antitubercular activity of isoniazid-gelatin conjugate. ACTA ACUST UNITED AC 2012; 64:712-8. [PMID: 22471367 DOI: 10.1111/j.2042-7158.2012.01461.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES A novel and simple method to synthesize antitubercular-protein conjugate by solid phase synthesis was developed employing a carboxypolystyrene resin. The aim was to covalently bind a drug with antitubercular activity, isoniazid, to a biomacromolecule, gelatin, widely used in the pharmaceutical, cosmetic and food industry. METHODS Calorimetric and (1) H NMR analyses were performed to verify the bond formation between the antitubercular drug and gelatin. After absorption isoniazid delivers toxic metabolites and so an oxidation test with tert-butyl hydroperoxide was performed to assess the amount of toxic metabolites released from the prodrug (gelatin linked to isoniazid), compared with isoniazid itself. KEY FINDINGS Spectrophotometric analysis revealed that the protein derivative was an excellent isoniazid prodrug since there was a 40% reduction in release of toxic metabolites (isonicotinic acid) by the prodrug. The results clearly showed that antitubercular moieties, covalently linked to a natural polymer, allowed the introduction of peculiar features for specific pharmaceutical applications into the macromolecule. In addition, antitubercular activity of the new polymer was determined by Middlebrook 7H11 medium against Mycobacterium tuberculosis complex. CONCLUSIONS The new isoniazid-gelatin conjugate showed significant antitubercular activity and for this reason should be useful as an efficacious tool in the treatment of tuberculosis.
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Affiliation(s)
- Roberta Cassano
- Department of Pharmaceutical Sciences, University of Calabria, Cosenza, Italy
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50
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Oda Y, Sato T, Chida N. Direct Chemoselective Allylation of Inert Amide Carbonyls. Org Lett 2012; 14:950-3. [DOI: 10.1021/ol3000316] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yukiko Oda
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takaaki Sato
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Noritaka Chida
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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