1
|
Zhong B, Chen F, Ge Y, Liu D. Developing a fast and catalyst-free protocol to form C=N double bond with high functional group tolerance. ROYAL SOCIETY OPEN SCIENCE 2023; 10:231263. [PMID: 37800155 PMCID: PMC10548102 DOI: 10.1098/rsos.231263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/12/2023] [Indexed: 10/07/2023]
Abstract
The carbon-nitrogen double bond (C=N) is a fundamentally important functional group in organic chemistry. This is largely due to the fact that C=N acts as electrophilic synthon to give nitrogen-containing compounds. Here, we report the condensation of primary amine or hydrazine with very electron-deficient aldehyde to form C=N bond in the absence of any catalysts (metals and acids). The protocol performs at room temperature and applies water as co-solvent. Two hundred examples are presented here. With its intrinsic advantages of wide substrate scopes, excellent efficiency (high yields and short reaction time), operational simplicity, mild condition (room temperature as reaction temperature, no catalysts, no additions, water as co-solvent and opening to air) and available starting materials, the protocol can be compatible with various drugs, prodrugs, dyes and pharmacophores containing primary amino group. In addition, we also successfully apply this protocol to rapidly synthesize the core scaffolds of bioactive molecules.
Collapse
Affiliation(s)
- Bin Zhong
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Feng Chen
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Yushu Ge
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Dan Liu
- Heifei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
- The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui 230001, People's Republic of China
| |
Collapse
|
2
|
Spasov AA, Brigadirova AA, Zhukovskaya ON, Morkovnik AS, Lifanova YV. Search for compounds with antioxidant and antiradical activity among N9-substituted 2-(biphenyl-4-yl)imidazo[1,2-a]benzimidazoles. RESEARCH RESULTS IN PHARMACOLOGY 2022. [DOI: 10.3897/rrpharmacology.8.85498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: Biphenyl and imidazobenzimidazole derivatives attract ongoing attention as a combination of these two privileged substructures with promising pharmacological activities. The aim of this study was to synthesize and investigate in vitro antioxidant activity of promising novel compounds: 2-(biphenyl-4-yl)imidazo[1,2-a]benzimidazoles.
Materials and methods: The newly synthesized compounds were characterized by IR, 1H NMR and CHBr(Cl)NO analyses. All newly synthesized compounds were screened for their in vitro antioxidant activity: inhibition of lipid peroxidation (LPO), 2,2’-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS•+) radical cation decolorization and inhibition of hemoglobin (Hb)-H2O2-induced luminol chemiluminescence.
Results and discussion: 2-Amino-3-[(2-biphenyl-4-yl)-2-oxo-ethyl)]-1-R-1Н-benzimidazolium bromides were synthesized, and their cyclization into functionalized imidazo[1,2-a]benzimidazole derivatives was studied. The resulting compounds showed LPO inhibitory activity comparable to that of dibunol. Compounds 1a and 1d (see graphical abstract), containing a methyl or dimethylaminoethyl substituent in the N9 position also proved to be equally highly active in the Hb-H2O2-induced luminol chemiluminescence model, while compound 1a was somewhat more active than 1d in the ABTS• radical scavenging assay.
Conclusion: The study showed that compounds 1a and 1d have the highest antioxidant activity. Thus, this new class of 2-(biphenyl-4-yl)imidazo[1,2-a]benzimidazole derivatives represents a valuable leading series with great potential for use as antioxidants and as promising candidates for further efficacy evaluation.
Graphical abstract:
Collapse
|
3
|
Wu YC, Lu MT, Lin TH, Chu PC, Chang CS. Synthesis and Evaluation of Biarylquinoline Derivatives as Novel HIF-1α Inhibitors. Bioorg Chem 2022; 121:105681. [DOI: 10.1016/j.bioorg.2022.105681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 12/02/2021] [Accepted: 02/09/2022] [Indexed: 11/26/2022]
|
4
|
Alapafuja SO, Nikas SP, Ho TC, Tong F, Benchama O, Makriyannis A. Chain Substituted Cannabilactones with Selectivity for the CB2 Cannabinoid Receptor. Molecules 2019; 24:E3559. [PMID: 31581433 PMCID: PMC6804212 DOI: 10.3390/molecules24193559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/25/2019] [Accepted: 09/27/2019] [Indexed: 11/21/2022] Open
Abstract
In earlier work, we reported a novel class of CB2 selective ligands namely cannabilactones. These compounds carry a dimethylheptyl substituent at C3, which is typical for synthetic cannabinoids. In the current study with the focus on the pharmacophoric side chain at C3 we explored the effect of replacing the C1'-gem-dimethyl group with the bulkier cyclopentyl ring, and, we also probed the chain's length and terminal carbon substitution with bromo or cyano groups. One of the analogs synthesized namely 6-[1-(1,9-dihydroxy-6-oxo-6H-benzo[c]chromen-3-yl) cyclopentyl] hexanenitrile (AM4346) has very high affinity (Ki = 4.9 nM) for the mouse CB2 receptor (mCB2) and 131-fold selectivity for that target over the rat CB1 (rCB1). The species difference in the affinities of AM4346 between the mouse (m) and the human (h) CB2 receptors is reduced when compared to our first-generation cannabilactones. In the cyclase assay, our lead compound was found to be a highly potent and efficacious hCB2 receptor agonist (EC50 = 3.7 ± 1.5 nM, E(max) = 89%). We have also extended our structure-activity relationship (SAR) studies to include biphenyl synthetic intermediates that mimic the structure of the phytocannabinoid cannabinodiol.
Collapse
Affiliation(s)
- Shakiru O Alapafuja
- Center for Drug Discovery and Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA.
| | - Spyros P Nikas
- Center for Drug Discovery and Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA.
| | - Thanh C Ho
- Center for Drug Discovery and Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA.
| | - Fei Tong
- Center for Drug Discovery and Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA.
| | - Othman Benchama
- Center for Drug Discovery and Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA.
| | - Alexandros Makriyannis
- Center for Drug Discovery and Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA.
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA 02115, USA.
| |
Collapse
|
5
|
Babkov DA, Zhukowskaya ON, Borisov AV, Babkova VA, Sokolova EV, Brigadirova AA, Litvinov RA, Kolodina AA, Morkovnik AS, Sochnev VS, Borodkin GS, Spasov AA. Towards multi-target antidiabetic agents: Discovery of biphenyl-benzimidazole conjugates as AMPK activators. Bioorg Med Chem Lett 2019; 29:2443-2447. [DOI: 10.1016/j.bmcl.2019.07.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/20/2019] [Accepted: 07/22/2019] [Indexed: 12/25/2022]
|
6
|
Portal C, Hintersteiner M, Barbeau O, Dodd P, Huggett M, Pérez‐Pi I, Evans D, Auer M. Facile Synthesis of a Next Generation Safety-Catch Acid-Labile Linker, SCAL-2, Suitable for Solid-Phase Synthesis, On-Support Display and for Post-Synthesis Tagging. ChemistrySelect 2017; 2:6658-6662. [PMID: 29104911 PMCID: PMC5661701 DOI: 10.1002/slct.201701519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 07/28/2017] [Accepted: 07/31/2017] [Indexed: 11/27/2022]
Abstract
The SCAL linker, a safety catch linker, is amongst the most versatile linkers for solid phase synthesis. It was originally described in 1991 by Pátek and Lebl. Yet, its application has been hindered by the low yields of published synthetic routes. Over time, the exceptional versatility of this linker has been demonstrated in several applications of advanced solid phase synthesis of peptides and peptidomimetics. Recently, an updated synthesis of the original linker has also been presented at the 22nd American Peptide Symposium, comprising 10 steps. Herein, the design and synthesis of a next generation SCAL linker, SCAL-2, is reported. SCAL-2 features a simplified molecular architecture, which allows for a more efficient synthesis in 8 steps with superior yields. Both linkers, SCAL and SCAL-2 are compared in terms of their cleavage properties adding valuable information on how to best utilize the versatility of these linkers for solid phase synthesis.
Collapse
Affiliation(s)
- Christophe Portal
- Edinburgh BioQuarter9 Little France Road, EdinburghScotland EH16 4UXU.K.
| | - Martin Hintersteiner
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| | - Olivier Barbeau
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| | - Peter Dodd
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| | - Margaret Huggett
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| | - Irene Pérez‐Pi
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| | - David Evans
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| | - Manfred Auer
- School of Biological Sciences and Edinburgh Medical School: Biomedical SciencesUniversity of Edinburgh, The King's Buildings, EdinburghScotland EH9 3BFU.K.
| |
Collapse
|
7
|
Dumas A, Spicer CD, Gao Z, Takehana T, Lin YA, Yasukohchi T, Davis BG. Self-Liganded Suzuki-Miyaura Coupling for Site-Selective Protein PEGylation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208626] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
8
|
Dumas A, Spicer CD, Gao Z, Takehana T, Lin YA, Yasukohchi T, Davis BG. Self-Liganded Suzuki-Miyaura Coupling for Site-Selective Protein PEGylation. Angew Chem Int Ed Engl 2013; 52:3916-21. [DOI: 10.1002/anie.201208626] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Indexed: 01/15/2023]
|
9
|
Adrio LA, Nguyen BN, Guilera G, Livingston AG, Hii KK(M. Speciation of Pd(OAc)2in ligandless Suzuki–Miyaura reactions. Catal Sci Technol 2012. [DOI: 10.1039/c1cy00241d] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Spencer J, Baltus CB, Patel H, Press NJ, Callear SK, Male L, Coles SJ. Microwave-mediated synthesis of an arylboronate library. ACS COMBINATORIAL SCIENCE 2011; 13:24-31. [PMID: 21247121 DOI: 10.1021/co100011g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of arylboronates has been synthesized from the reaction of 2-(2-, (3-, or (4-(bromomethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 1{1-3} respectively with a range of N-, S-, and O-nucleophiles, using microwave-mediated chemistry. For the synthesis of N- and S-substituted boronates, a supported base, PS-NMM, was employed, and many reactions were complete within 15 min. With O-nucleophiles, a mixture of tetrabutylammonium bromide, potassium carbonate, and sodium hydroxide was employed. The resulting aminomethyl, mercaptomethyl, or alkoxy-/phenoxymethyl-arylboronates were subjected to microwave-mediated Suzuki Miyaura coupling reactions to afford a range of biaryls in moderate to good yields. The X-ray structures of five boronates were determined.
Collapse
Affiliation(s)
- John Spencer
- School of Science at Medway, University of Greenwich, Chatham, ME4 4TB, U.K
| | | | - Hiren Patel
- School of Science at Medway, University of Greenwich, Chatham, ME4 4TB, U.K
| | - Neil J. Press
- Novartis Pharmaceuticals U.K., Horsham, Sussex, RH12 5AB, U.K
| | - Samantha K. Callear
- UK National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton. SO17 1BJ, U.K
| | - Louise Male
- UK National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton. SO17 1BJ, U.K
| | - Simon J. Coles
- UK National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton. SO17 1BJ, U.K
| |
Collapse
|
11
|
Schnur DM, Beno BR, Tebben AJ, Cavallaro C. Methods for combinatorial and parallel library design. Methods Mol Biol 2011; 672:387-434. [PMID: 20838978 DOI: 10.1007/978-1-60761-839-3_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Diversity has historically played a critical role in design of combinatorial libraries, screening sets and corporate collections for lead discovery. Large library design dominated the field in the 1990s with methods ranging anywhere from purely arbitrary through property based reagent selection to product based approaches. In recent years, however, there has been a downward trend in library size. This was due to increased information about the desirable targets gleaned from the genomics revolution and to the ever growing availability of target protein structures from crystallography and homology modeling. Creation of libraries directed toward families of receptors such as GPCRs, kinases, nuclear hormone receptors, proteases, etc., replaced the generation of libraries based primarily on diversity while single target focused library design has remained an important objective. Concurrently, computing grids and cpu clusters have facilitated the development of structure based tools that screen hundreds of thousands of molecules. Smaller "smarter" combinatorial and focused parallel libraries replaced those early un-focused large libraries in the twenty-first century drug design paradigm. While diversity still plays a role in lead discovery, the focus of current library design methods has shifted to receptor based methods, scaffold hopping/bio-isostere searching, and a much needed emphasis on synthetic feasibility. Methods such as "privileged substructures based design" and pharmacophore based design still are important methods for parallel and small combinatorial library design. This chapter discusses some of the possible design methods and presents examples where they are available.
Collapse
Affiliation(s)
- Dora M Schnur
- Computer Aided Drug Design, Pharmaceutical Research Institute, Bristol-Myers Squibb Company, Princeton, NJ, USA
| | | | | | | |
Collapse
|
12
|
Christ AN, Labzin L, Bourne GT, Fukunishi H, Weber JE, Sweet MJ, Smythe ML, Flanagan JU. Development and characterization of new inhibitors of the human and mouse hematopoietic prostaglandin D(2) synthases. J Med Chem 2010; 53:5536-48. [PMID: 20684598 DOI: 10.1021/jm100194a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The hematopoietic prostaglandin D(2) synthase has a proinflammatory effect in a range of diseases, including allergic asthma, where its product prostaglandin D(2) (PGD(2)) has a role in regulating many of the hallmark disease characteristics. Here we describe the development and characterization of a novel series of hematopoietic prostaglandin D(2) synthase inhibitors with potency similar to that of known inhibitors. Compounds N-benzhydryl-5-(3-hydroxyphenyl)thiophene-2-carboxamide (compound 8) and N-(1-amino-1-oxo-3-phenylpropan-2-yl)-6-(thiophen-2-yl)nicotinamide (compound 34) demonstrated low micromolar potency in the inhibition of the purified enzyme, while only 34 reduced Toll-like receptor (TLR) inducible PGD(2) production in both mouse primary bone marrow-derived macrophages and the human megakaryocytic cell line MEG-01S. Importantly, 34 demonstrated a greater selectivity for inhibition of PGD(2) synthesis versus other eicosanoids that lie downstream of PGH(2) (PGE(2) and markers of prostacyclin (6-keto PGF(1alpha)) and thromboxane (TXB(2))) when compared to the known inhibitors HQL-79 (compound 1) and 2-phenyl-5-(1H-pyrazol-3-yl)thiazole (compound 2). Compound 34 therefore represents a selective hematopoietic prostaglandin D(2) synthase inhibitor.
Collapse
Affiliation(s)
- Angelika N Christ
- Institute for Molecular Bioscience, The University of Queensland, Queensland, Australia
| | | | | | | | | | | | | | | |
Collapse
|