1
|
Taechalertpaisarn J, Ono S, Okada O, Johnstone TC, Scott Lokey R. A New Amino Acid for Improving Permeability and Solubility in Macrocyclic Peptides through Side Chain-to-Backbone Hydrogen Bonding. J Med Chem 2022; 65:5072-5084. [PMID: 35275623 PMCID: PMC10681114 DOI: 10.1021/acs.jmedchem.2c00010] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Despite the notoriously poor membrane permeability of peptides, many cyclic peptide natural products show high passive membrane permeability and potently inhibit a variety of "undruggable" intracellular targets. A major impediment to the design of cyclic peptides with good permeability is the high desolvation energy associated with the peptide backbone amide NH groups. While several strategies have been proposed to mitigate this deleterious effect, only few studies have used polar side chains to sequester backbone NH groups. We investigated the ability of N,N-pyrrolidinylglutamine (Pye), whose side chain contains a powerful hydrogen-bond-accepting C═O amide group but no hydrogen-bond donors, to sequester exposed backbone NH groups in a series of cyclic hexapeptide diastereomers. Analyses revealed that specific Leu-to-Pye substitutions conferred dramatic improvements in aqueous solubility and permeability in a scaffold- and position-dependent manner. Therefore, this approach offers a complementary tool for improving membrane permeability and solubility in cyclic peptides.
Collapse
Affiliation(s)
- Jaru Taechalertpaisarn
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Satoshi Ono
- Modality Laboratories, Innovative Research Division, Mitsubishi Tanabe Pharma Corporation, 1000 Kamoshidacho, Aoba-ku, Yokohama, Kanagawa 227-0033, Japan
| | - Okimasa Okada
- Modality Laboratories, Innovative Research Division, Mitsubishi Tanabe Pharma Corporation, 1000 Kamoshidacho, Aoba-ku, Yokohama, Kanagawa 227-0033, Japan
| | - Timothy C. Johnstone
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - R. Scott Lokey
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| |
Collapse
|
2
|
Xu W, Brown LE, Porco JA. Divergent, C-C Bond Forming Macrocyclizations Using Modular Sulfonylhydrazone and Derived Substrates. J Org Chem 2021; 86:16485-16510. [PMID: 34730970 PMCID: PMC8783553 DOI: 10.1021/acs.joc.1c01848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A divergent approach to C-C bond forming macrocycle construction is described. Modular sulfonylhydrazone and derived pyridotriazole substrates with three key building blocks have been constructed and cyclized to afford diverse macrocyclic frameworks. Broad substrate scope and functional group tolerance have been demonstrated. In addition, site-selective postfunctionalization allowed for further diversification of macrocyclic cores.
Collapse
Affiliation(s)
- Wenqing Xu
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - Lauren E. Brown
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - John A. Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| |
Collapse
|
3
|
Feng QY, Zhu J, Wang MX, Tong S. Organocatalytic Double Ugi Reaction with Statistical Amplification of Product Enantiopurity: A Linker Cleavage Approach To Access Highly Enantiopure Ugi Products. Org Lett 2019; 22:483-487. [DOI: 10.1021/acs.orglett.9b04239] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qi-Yun Feng
- Key Laboratory of Bioorganic Phosphorous and Chemical Biology (Ministry of Education), Tsinghua University, 100084 Beijing, P. R. China
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Poltechnique Fédérale de Lausanne EPFL-SB-ISIC-LSPN, BCH 5304, 1015 Lausanne, Switzerland
| | - Mei-Xiang Wang
- Key Laboratory of Bioorganic Phosphorous and Chemical Biology (Ministry of Education), Tsinghua University, 100084 Beijing, P. R. China
| | - Shuo Tong
- Key Laboratory of Bioorganic Phosphorous and Chemical Biology (Ministry of Education), Tsinghua University, 100084 Beijing, P. R. China
| |
Collapse
|
4
|
Chow HY, Zhang Y, Matheson E, Li X. Ligation Technologies for the Synthesis of Cyclic Peptides. Chem Rev 2019; 119:9971-10001. [PMID: 31318534 DOI: 10.1021/acs.chemrev.8b00657] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Cyclic peptides have been attracting a lot of attention in recent decades, especially in the area of drug discovery, as more and more naturally occurring cyclic peptides with diverse biological activities have been discovered. Chemical synthesis of cyclic peptides is essential when studying their structure-activity relationships. Conventional peptide cyclization methods via direct coupling have inherent limitations, like the susceptibility to epimerization at the C-terminus, poor solubility of fully protected peptide precursors, and low yield caused by oligomerization. In this regard, chemoselective ligation-mediated cyclization methods have emerged as effective strategies for cyclic peptide synthesis. The toolbox for cyclic peptide synthesis has been expanded substantially in the past two decades, allowing more efficient synthesis of cyclic peptides with various scaffolds and modifications. This Review will explore different chemoselective ligation technologies used for cyclic peptide synthesis that generate both native and unnatural peptide linkages. The practical issues and limitations of different methods will be discussed. The advance in cyclic peptide synthesis will benefit the biological and medicinal study of cyclic peptides, an important class of macrocycles with potentials in numerous fields, notably in therapeutics.
Collapse
Affiliation(s)
- Hoi Yee Chow
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , P. R. China
| | - Yue Zhang
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , P. R. China
| | - Eilidh Matheson
- School of Chemistry , University of Edinburgh , Edinburgh EH8 9LE , United Kingdom
| | - Xuechen Li
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , P. R. China.,Laboratory for Marine Drugs and Bioproducts , Qingdao National Laboratory for Marine Science and Technology , Qingdao 266237 , P. R. China
| |
Collapse
|
5
|
Mortensen KT, Osberger TJ, King TA, Sore HF, Spring DR. Strategies for the Diversity-Oriented Synthesis of Macrocycles. Chem Rev 2019; 119:10288-10317. [DOI: 10.1021/acs.chemrev.9b00084] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kim T. Mortensen
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| | - Thomas J. Osberger
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| | - Thomas A. King
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| | - Hannah F. Sore
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| | - David R. Spring
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| |
Collapse
|
6
|
Stereoselective Multicomponent Reactions in the Synthesis or Transformations of Epoxides and Aziridines. Molecules 2019; 24:molecules24030630. [PMID: 30754666 PMCID: PMC6384726 DOI: 10.3390/molecules24030630] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/04/2019] [Accepted: 02/07/2019] [Indexed: 01/14/2023] Open
Abstract
Small ring heterocycles, such as epoxides and aziridines, are present in several natural products and are also highly versatile building blocks, frequently involved in the synthesis of numerous bioactive products and pharmaceuticals. Because of the potential for increased efficiency and selectivity, along with the advantages of environmentally benign synthetic procedures, multicomponent reactions (MCRs) have been explored in the synthesis and ring opening of these heterocyclic units. In this review, the recent advances in MCRs involving the synthesis and applications of epoxides and aziridines to the preparation of other heterocycles are discussed emphasizing the stereoselectivity of the reactions.
Collapse
|
7
|
Belding L, Zaretsky S, Yudin AK, Dudding T. A Mechanistic Model for the Aziridine Aldehyde-Driven Macrocyclization of Peptides. J Org Chem 2018; 83:9119-9124. [PMID: 29966423 DOI: 10.1021/acs.joc.8b01198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aziridine aldehyde-driven macrocyclization of peptides is a powerful tool for the construction of biologically active macrocycles. While this process has been used to generate diverse collections of cyclic molecules, its mechanistic underpinnings have remained unclear. To enable progress in this area we have carried out a mechanistic study, which suggests that the cyclization owes its efficiency to a combination of electrostatic attraction between the termini of a nitrilium ion intermediate and intramolecular hydrogen bonding. Our model adequately explains the experimentally observed trends, including diastereoselectivity, and should facilitate the development of other macrocyclization reactions.
Collapse
Affiliation(s)
- Lee Belding
- Department of Chemistry , Brock University , St. Catharines , Ontario L2S 3A1 , Canada
| | - Serge Zaretsky
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 2J7 , Canada
| | - Andrei K Yudin
- Department of Chemistry , University of Toronto , Toronto , Ontario M5S 2J7 , Canada
| | - Travis Dudding
- Department of Chemistry , Brock University , St. Catharines , Ontario L2S 3A1 , Canada
| |
Collapse
|
8
|
Kaldas SJ, Yudin AK. Achieving Skeletal Diversity in Peptide Macrocycles through The Use of Heterocyclic Grafts. Chemistry 2018; 24:7074-7082. [DOI: 10.1002/chem.201705418] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Sherif J. Kaldas
- Davenport Research Laboratories, Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Andrei K. Yudin
- Davenport Research Laboratories, Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| |
Collapse
|
9
|
Wei Q, Ma X, Chen J, Niu L, Yang X, Xia F, Liu S. A triple-functionalised metal centre-catalyzed enantioselective multicomponent reaction. Org Chem Front 2018. [DOI: 10.1039/c8qo00703a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A model of a triple-functionalised metal centre for the discovery of unprecedented enantioselective reactions was exquisitely developed by using a RhI/(DHQ)2PHAL catalyst system via multiple coordination interactions with different ligands and substrates.
Collapse
Affiliation(s)
- Qinghua Wei
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Xiaochu Ma
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Jianghui Chen
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Li Niu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Xi Yang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Fei Xia
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Shunying Liu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| |
Collapse
|
10
|
Zaretsky S, Yudin AK. Recent advances in the synthesis of cyclic pseudopeptides. DRUG DISCOVERY TODAY. TECHNOLOGIES 2017; 26:3-10. [PMID: 29249240 DOI: 10.1016/j.ddtec.2017.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 11/15/2017] [Indexed: 06/07/2023]
Abstract
Constrained peptides pose tremendous value in drug discovery. For example, owing to their large surface areas, they offer novel ways at inhibiting protein-protein interactions. As this field has grown, it has become desirable to introduce non-peptidic functionality into these rings to enable differentiated structure activity relationships and improved pharmacokinetic properties. Recent advances in the synthesis of cyclic pseudopeptides include macrocyclization through cysteine alkylation, multicomponent reactions, decarboxylative couplings, and novel stapling chemistry.
Collapse
Affiliation(s)
- Serge Zaretsky
- University of Toronto, Lash Miller Chemical Labs, 80 St. George Street, Toronto, ON M5S 3H6, Canada.
| | - Andrei K Yudin
- University of Toronto, Lash Miller Chemical Labs, 80 St. George Street, Toronto, ON M5S 3H6, Canada.
| |
Collapse
|
11
|
Tangara S, Kanazawa A, Py S. The Baldwin Rearrangement: Synthesis of 2-Acylaziridines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700920] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Salia Tangara
- Univ. Grenoble Alpes; DCM; CNRS; 38000 Grenoble France
| | | | - Sandrine Py
- Univ. Grenoble Alpes; DCM; CNRS; 38000 Grenoble France
| |
Collapse
|
12
|
Solid-phase synthesis, cyclization, and site-specific functionalization of aziridine-containing tetrapeptides. Nat Protoc 2017; 12:1277-1287. [PMID: 28538738 DOI: 10.1038/nprot.2017.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cyclic tetrapeptides comprise a potent and selective class of molecules with a wide range of biological activities, including the phytotoxic activity of tentoxin and the histone deacetylase (HDAC) inhibitory effects of chlamydocin. The incorporation of a functional aziridine group within cyclic peptides enables their conformational control and allows for late-stage and site-selective functionalization of these molecules, thereby creating the potential for covalent protein labeling. This protocol describes the solid-phase synthesis, cyclization, and site-specific structural modification of aziridine-containing tetrapeptides. The linear precursors are assembled by solid-phase peptide synthesis using Fmoc-protected amino acid building blocks, followed by head-to-tail peptide cyclization. Cyclization is performed using a slow reverse-addition method that prevents the formation of undesired higher-order cyclo-oligomeric side products. Site-specific structural modification of the resulting macrocycles is described using sodium azide or thiophenol as representative examples. It requires ∼4 d to prepare peptide macrocycles from their respective Fmoc-protected amino acid starting materials, an improvement upon the 3 weeks required for conventional solution-phase methods. This protocol also addresses important considerations regarding the handling of these compounds, whose electrophilic aziridine functionalities can otherwise be prone to undesired side reactions. With recent developments in aziridine-containing macrocyclic peptide synthesis and the potential for covalent protein labeling, these scaffolds represent a valuable addition to many screening libraries, and we expect that access to these macrocycles will facilitate efforts in drug discovery and molecular probe development.
Collapse
|
13
|
Donald JR, Unsworth WP. Ring-Expansion Reactions in the Synthesis of Macrocycles and Medium-Sized Rings. Chemistry 2017; 23:8780-8799. [DOI: 10.1002/chem.201700467] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Indexed: 01/20/2023]
Affiliation(s)
- James R. Donald
- Department of Chemistry; University of York; Heslington, York YO10 5DD UK
| | | |
Collapse
|
14
|
Johnson AM, Anslyn EV. Reversible Macrocyclization of Peptides with a Conjugate Acceptor. Org Lett 2017; 19:1654-1657. [DOI: 10.1021/acs.orglett.7b00451] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amber M. Johnson
- Department of Chemistry, University of Texas, 1 University Station A1590, Austin, Texas 78712, United States
| | - Eric V. Anslyn
- Department of Chemistry, University of Texas, 1 University Station A1590, Austin, Texas 78712, United States
| |
Collapse
|
15
|
Baud LG, Manning MA, Arkless HL, Stephens TC, Unsworth WP. Ring-Expansion Approach to Medium-Sized Lactams and Analysis of Their Medicinal Lead-Like Properties. Chemistry 2017; 23:2225-2230. [PMID: 27935197 DOI: 10.1002/chem.201605615] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Indexed: 12/20/2022]
Abstract
Medium-sized rings are widely considered to be under-represented in biological screening libraries for lead identification in medicinal chemistry. To help address this, a library of medium-sized lactams has been generated by using a simple, scalable and versatile ring-expansion protocol. Analysis of the library by using open-access computational tool LLAMA suggested that these lactams and their derivatives have highly promising physicochemical and 3D spatial properties and thus have much potential in drug discovery.
Collapse
|
16
|
Frost JR, Scully CCG, Yudin AK. Oxadiazole grafts in peptide macrocycles. Nat Chem 2016; 8:1105-1111. [PMID: 27874866 DOI: 10.1038/nchem.2636] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 09/05/2016] [Indexed: 02/08/2023]
Abstract
Synthetic methods that provide control over macrocycle conformation and, at the same time, mitigate the polarity of peptide bonds represent valuable tools for the discovery of new bioactive molecules. Here, we report a macrocyclization reaction between a linear peptide, an aldehyde and (N-isocyanimino)triphenylphosphorane. This process generates head-to-tail cyclic peptidomimetics in a single step. This method is tolerant to variation in the peptide and aldehyde components and has been applied for the synthesis of 15-, 18-, 21- and 24-membered rings. The resulting peptide macrocycles feature a 1,3,4-oxadiazole and a tertiary amine in their scaffolds. This non-canonical backbone region acts as an endocyclic control element that promotes and stabilizes a unique intramolecular hydrogen-bond network and can lead to macrocycles with conformationally rigid turn structures. Oxadiazole-containing macrocycles can also display a high passive membrane permeability, an important property for the development of bioavailable peptide-based therapeutics.
Collapse
Affiliation(s)
- John R Frost
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
| | - Conor C G Scully
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
| | - Andrei K Yudin
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
| |
Collapse
|
17
|
Hickey JL, Zaretsky S, St. Denis MA, Kumar Chakka S, Morshed MM, Scully CCG, Roughton AL, Yudin AK. Passive Membrane Permeability of Macrocycles Can Be Controlled by Exocyclic Amide Bonds. J Med Chem 2016; 59:5368-76. [DOI: 10.1021/acs.jmedchem.6b00222] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jennifer L. Hickey
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Encycle Therapeutics Inc., 101
College Street, Suite 314, Toronto, Ontario M5G 1L7, Canada
| | - Serge Zaretsky
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Megan A. St. Denis
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Encycle Therapeutics Inc., 101
College Street, Suite 314, Toronto, Ontario M5G 1L7, Canada
| | - Sai Kumar Chakka
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Encycle Therapeutics Inc., 101
College Street, Suite 314, Toronto, Ontario M5G 1L7, Canada
| | - M. Monzur Morshed
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Encycle Therapeutics Inc., 101
College Street, Suite 314, Toronto, Ontario M5G 1L7, Canada
| | - Conor C. G. Scully
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Andrew L. Roughton
- Encycle Therapeutics Inc., 101
College Street, Suite 314, Toronto, Ontario M5G 1L7, Canada
| | - Andrei K. Yudin
- Davenport
Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| |
Collapse
|
18
|
Low KE, Ler S, Chen KJ, Campbell RL, Hickey JL, Tan J, Scully CCG, Davies PL, Yudin AK, Zaretsky S. Rational Design of Calpain Inhibitors Based on Calpastatin Peptidomimetics. J Med Chem 2016; 59:5403-15. [DOI: 10.1021/acs.jmedchem.6b00267] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kristin E. Low
- Department
of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Spencer Ler
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Kevin J. Chen
- Department
of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Robert L. Campbell
- Department
of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Jennifer L. Hickey
- Encycle Therapeutics Inc., 101
College Street, Suite 314, Toronto, Ontario M5G 1L7, Canada
| | - Joanne Tan
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Conor C. G. Scully
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Peter L. Davies
- Department
of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Andrei K. Yudin
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Serge Zaretsky
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| |
Collapse
|
19
|
Vincent-Rocan JF, Ivanovich RA, Clavette C, Leckett K, Bejjani J, Beauchemin AM. Cascade reactions of nitrogen-substituted isocyanates: a new tool in heterocyclic chemistry. Chem Sci 2016; 7:315-328. [PMID: 29861985 PMCID: PMC5952554 DOI: 10.1039/c5sc03197d] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 09/22/2015] [Indexed: 11/25/2022] Open
Abstract
In contrast to normal C-substituted isocyanates, nitrogen-substituted isocyanates (N-isocyanates) are rare. Their high reactivity and amphoteric/ambident nature has prevented the scientific community from exploiting their synthetic potential. Recently, we have developed an in situ formation approach using a reversible equilibrium, which allows controlled generation and reactivity of N-isocyanates and prevents the dimerization that is typically observed with these intermediates. This blocked (masked) N-isocyanate approach enables the use of various N-isocyanate precursors to assemble heterocycles possessing the N-N-C[double bond, length as m-dash]O motif, which is often found in agrochemicals and pharmaceuticals. Cascade reactions for the rapid assembly of several valuable 5- and 6-membered heterocycles are reported, including amino-hydantoins, acyl-pyrazoles, acyl-phthalazinones and azauracils. Over 100 different compounds were synthesized using amino-, imino- and amido-substituted N-isocyanates, demonstrating their potential as powerful intermediates in heterocyclic synthesis. Their reactivity also enables access to unprecedented bicyclic derivatives and to substitution patterns of azauracils that are difficult to access using known methods, illustrating that controlled reactivity of N-isocyanates provides new disconnections, and a new tool to assemble complex N-N-C[double bond, length as m-dash]O containing motifs.
Collapse
Affiliation(s)
- Jean-François Vincent-Rocan
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Ryan A Ivanovich
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Christian Clavette
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Kyle Leckett
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Julien Bejjani
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - André M Beauchemin
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| |
Collapse
|
20
|
Kitsiou C, Hindes JJ, I'Anson P, Jackson P, Wilson TC, Daly EK, Felstead HR, Hearnshaw P, Unsworth WP. The Synthesis of Structurally Diverse Macrocycles By Successive Ring Expansion. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509153] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
21
|
Kitsiou C, Hindes JJ, I'Anson P, Jackson P, Wilson TC, Daly EK, Felstead HR, Hearnshaw P, Unsworth WP. The Synthesis of Structurally Diverse Macrocycles By Successive Ring Expansion. Angew Chem Int Ed Engl 2015; 54:15794-8. [PMID: 26768697 DOI: 10.1002/anie.201509153] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 10/28/2015] [Indexed: 11/10/2022]
Abstract
Structurally diverse macrocycles and medium-sized rings (9-24 membered scaffolds, 22 examples) can be generated through a telescoped acylation/ring-expansion sequence, leading to the insertion of linear fragments into cyclic β-ketoesters without performing a discrete macrocyclization step. The key β-ketoester motif is regenerated in the ring-expanded product, meaning that the same sequence of steps can then be repeated (in theory indefinitely) with other linear fragments, allowing macrocycles with precise substitution patterns to be "grown" from smaller rings using the successive ring-expansion (SuRE) method.
Collapse
|