1
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Zhang Q, Soulère L, Queneau Y. Amide bioisosteric replacement in the design and synthesis of quorum sensing modulators. Eur J Med Chem 2024; 273:116525. [PMID: 38801798 DOI: 10.1016/j.ejmech.2024.116525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/08/2024] [Accepted: 05/20/2024] [Indexed: 05/29/2024]
Abstract
The prevention or control of bacterial infections requires continuous search for novel approaches among which bacterial quorum sensing inhibition is considered as a complementary antibacterial strategy. Quorum sensing, used by many different bacteria, functions through a cell-to-cell communication mechanism relying on chemical signals, referred to as autoinducers, such as N-acyl homoserine lactones (AHLs) which are the most common chemical signals in this system. Designing analogs of these autoinducers is one of the possible ways to interfere with quorum sensing. Since bioisosteres are powerful tools in medicinal chemistry, targeting analogs of AHLs or other signal molecules and mimics of known QS modulators built on amide bond bioisosteres is a relevant strategy in molecular design and synthetic routes. This review highlights the application of amide bond bioisosteric replacement in the design and synthesis of novel quorum sensing inhibitors.
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Affiliation(s)
- Qiang Zhang
- Hubei Key Laboratory of Purification and Application of Plant Anti-cancer Active Ingredients, Hubei University of Education, 129 Second Gaoxin Road, Wuhan 430205, China
| | - Laurent Soulère
- INSA Lyon, CNRS, Universite Claude Bernard Lyon 1, UMR 5246, ICBMS, Bât. E. Lederer, 1 rue Victor Grignard, F-69622, Villeurbanne, France
| | - Yves Queneau
- INSA Lyon, CNRS, Universite Claude Bernard Lyon 1, UMR 5246, ICBMS, Bât. E. Lederer, 1 rue Victor Grignard, F-69622, Villeurbanne, France.
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2
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Liu WQ, Lee BC, Song N, He Z, Shen ZA, Lu Y, Koh MJ. Electrochemical Synthesis of C(sp 3)-Rich Amines by Aminative Carbofunctionalization of Carbonyl Compounds. Angew Chem Int Ed Engl 2024:e202402140. [PMID: 38650440 DOI: 10.1002/anie.202402140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/16/2024] [Accepted: 04/22/2024] [Indexed: 04/25/2024]
Abstract
Alkylamines form the backbone of countless nitrogen-containing small molecules possessing desirable biological properties. Despite advances in amine synthesis through transition metal catalysis and photoredox chemistry, multicomponent reactions that leverage inexpensive materials to transform abundant chemical feedstocks into three-dimensional α-substituted alkylamines bearing complex substitution patterns remain scarce. Here, we report the design of a catalyst-free electroreductive manifold that merges amines, carbonyl compounds and carbon-based radical acceptors under ambient conditions without rigorous exclusion of air and moisture. Key to this aminative carbofunctionalization process is the chemoselective generation of nucleophilic α-amino radical intermediates that readily couple with electrophilic partners, providing straightforward access to architecturally intricate alkylamines and drug-like scaffolds which are inaccessible by conventional means.
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Affiliation(s)
- Wen-Qiang Liu
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Boon Chong Lee
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - NingXi Song
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Zhenghao He
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Zi-An Shen
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Yixin Lu
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Ming Joo Koh
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
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3
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Guillemard L, Ackermann L, Johansson MJ. Late-stage meta-C-H alkylation of pharmaceuticals to modulate biological properties and expedite molecular optimisation in a single step. Nat Commun 2024; 15:3349. [PMID: 38637496 PMCID: PMC11026381 DOI: 10.1038/s41467-024-46697-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 02/29/2024] [Indexed: 04/20/2024] Open
Abstract
Catalysed C-H activation has emerged as a transformative platform for molecular synthesis and provides new opportunities in drug discovery by late-stage functionalisation (LSF) of complex molecules. Notably, small aliphatic motifs have gained significant interest in medicinal chemistry for their beneficial properties and applications as sp3-rich functional group bioisosteres. In this context, we disclose a versatile strategy with broad applicability for the ruthenium-catalysed late-stage meta-C(sp2)-H alkylation of pharmaceuticals. This general protocol leverages numerous directing groups inherently part of bioactive scaffolds to selectivity install a variety of medicinally relevant bifunctional alkyl units within drug compounds. Our strategy enables the direct modification of unprotected lead structures to quickly generate an array of pharmaceutically useful analogues without resorting to de novo syntheses. Moreover, productive late-stage modulation of key biological characteristics of drug candidates upon remote C-H alkylation proves viable, highlighting the major benefits of our approach to offer in drug development programmes.
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Affiliation(s)
- Lucas Guillemard
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen, Göttingen, Germany.
- German Centre for Cardiovascular Research (DZHK), Berlin, Germany.
| | - Magnus J Johansson
- Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.
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4
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Phelps J, Kumar R, Robinson JD, Chu JCK, Flodén NJ, Beaton S, Gaunt MJ. Multicomponent Synthesis of α-Branched Amines via a Zinc-Mediated Carbonyl Alkylative Amination Reaction. J Am Chem Soc 2024; 146:9045-9062. [PMID: 38488310 PMCID: PMC10996026 DOI: 10.1021/jacs.3c14037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/09/2024] [Accepted: 02/20/2024] [Indexed: 03/21/2024]
Abstract
Methods for the synthesis of α-branched alkylamines are important due to their ubiquity in biologically active molecules. Despite the development of many methods for amine preparation, C(sp3)-rich nitrogen-containing compounds continue to pose challenges for synthesis. While carbonyl reductive amination (CRA) between ketones and alkylamines is the cornerstone method for α-branched alkylamine synthesis, it is sometimes limited by the sterically demanding condensation step between dialkyl ketones and amines and the more restricted availability of ketones compared to aldehydes. We recently reported a "higher-order" variant of this transformation, carbonyl alkylative amination (CAA), which utilized a halogen atom transfer (XAT)-mediated radical mechanism, enabling the streamlined synthesis of complex α-branched alkylamines. Despite the efficacy of this visible-light-driven approach, it displayed scalability issues, and competitive reductive amination was a problem for certain substrate classes, limiting applicability. Here, we report a change in the reaction regime that expands the CAA platform through the realization of an extremely broad zinc-mediated CAA reaction. This new strategy enabled elimination of competitive CRA, simplified purification, and improved reaction scope. Furthermore, this new reaction harnessed carboxylic acid derivatives as alkyl donors and facilitated the synthesis of α-trialkyl tertiary amines, which cannot be accessed via CRA. This Zn-mediated CAA reaction can be carried out at a variety of scales, from a 10 μmol setup in microtiter plates enabling high-throughput experimentation, to the gram-scale synthesis of medicinally-relevant compounds. We believe that this transformation enables robust, efficient, and economical access to α-branched alkylamines and provides a viable alternative to the current benchmark methods.
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Affiliation(s)
| | | | | | | | - Nils J. Flodén
- Yusuf Hamied Department of
Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Sarah Beaton
- Yusuf Hamied Department of
Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Matthew J. Gaunt
- Yusuf Hamied Department of
Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
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5
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Liashuk OS, Andriashvili VA, Tolmachev AO, Grygorenko OO. Chemoselective Reactions of Functionalized Sulfonyl Halides. CHEM REC 2024; 24:e202300256. [PMID: 37823680 DOI: 10.1002/tcr.202300256] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/13/2023] [Indexed: 10/13/2023]
Abstract
Chemoselective transformations of functionalized sulfonyl fluorides and chlorides are surveyed comprehensively. It is shown that sulfonyl fluorides provide an excellent selectivity control in their reactions. Thus, numerous conditions are tolerated by the SO2 F group - from amide and ester formation to directed ortho-lithiation and transition-metal-catalyzed cross-couplings. Meanwhile, sulfur (VI) fluoride exchange (SuFEx) is also compatible with numerous functional groups, thus confirming its title of "another click reaction". On the contrary, with a few exceptions, most transformations of functionalized sulfonyl chlorides typically occur at the SO2 Cl moiety.
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Affiliation(s)
- Oleksandr S Liashuk
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyїv, 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyїv, 01601, Ukraine
| | - Vladyslav A Andriashvili
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyїv, 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyїv, 01601, Ukraine
| | - Andriy O Tolmachev
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyїv, 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyїv, 01601, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd. (www.enamine.net), Winston Churchill Street 78, Kyїv, 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyїv, 01601, Ukraine
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6
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Chan AHY, Ho TCS, Leeper FJ. Thiamine analogues featuring amino-oxetanes as potent and selective inhibitors of pyruvate dehydrogenase. Bioorg Med Chem Lett 2024; 98:129571. [PMID: 38036274 DOI: 10.1016/j.bmcl.2023.129571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/09/2023] [Accepted: 11/28/2023] [Indexed: 12/02/2023]
Abstract
Pyruvate dehydrogenase complex (PDHc) is suppressed in some cancer types but overexpressed in others. To understand its contrasting oncogenic roles, there is a need for selective PDHc inhibitors. Its E1-subunit (PDH E1) is a thiamine pyrophosphate (TPP)-dependent enzyme and catalyses the first and rate-limiting step of the complex. In a recent study, we reported a series of ester-based thiamine analogues as selective TPP-competitive PDH E1 inhibitors with low nanomolar affinity. However, when the ester linker was replaced with an amide for stability reasons, the binding affinity was significantly reduced. In this study, we show that an amino-oxetane bioisostere of the amide improves the affinity and maintains stability towards esterase-catalysed hydrolysis.
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Affiliation(s)
- Alex H Y Chan
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Terence C S Ho
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Finian J Leeper
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
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7
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Huang G, Hucek D, Cierpicki T, Grembecka J. Applications of oxetanes in drug discovery and medicinal chemistry. Eur J Med Chem 2023; 261:115802. [PMID: 37713805 DOI: 10.1016/j.ejmech.2023.115802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/17/2023]
Abstract
The compact and versatile oxetane motifs have gained significant attention in drug discovery and medicinal chemistry campaigns. This review presents an overview of the diverse applications of oxetanes in clinical and preclinical drug candidates targeting various human diseases, including cancer, viral infections, autoimmune disorders, neurodegenerative conditions, metabolic disorders, and others. Special attention is given to biologically active oxetane-containing compounds and their disease-related targets, such as kinases, epigenetic and non-epigenetic enzymes, and receptors. The review also details the effect of the oxetane motif on important properties, including aqueous solubility, lipophilicity, pKa, P-glycoprotein (P-gp) efflux, metabolic stability, conformational preferences, toxicity profiles (e.g., cytochrome P450 (CYP) suppression and human ether-a-go-go related gene (hERG) inhibition), pharmacokinetic (PK) properties, potency, and target selectivity. We anticipate that this work will provide valuable insights that can drive future discoveries of novel bioactive oxetane-containing small molecules, enabling their effective application in combating a wide range of human diseases.
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Affiliation(s)
- Guang Huang
- Department of Pathology, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Devon Hucek
- Department of Pathology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Tomasz Cierpicki
- Department of Pathology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Jolanta Grembecka
- Department of Pathology, University of Michigan, Ann Arbor, MI, 48109, USA
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8
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Chao Y, Subramaniam M, Namitharan K, Zhu Y, Koolma V, Hao Z, Li S, Wang Y, Hudoynazarov I, Miloserdov FM, Zuilhof H. Synthesis of Large Macrocycles with Chiral Sulfur Centers via Enantiospecific SuFEx and SuPhenEx Click Reactions. J Org Chem 2023; 88:15658-15665. [PMID: 37903243 PMCID: PMC10660663 DOI: 10.1021/acs.joc.3c01656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/26/2023] [Accepted: 10/05/2023] [Indexed: 11/01/2023]
Abstract
Here we report the first asymmetric synthesis of large chiral macrocycles with chiral sulfur atoms. Building on stereospecific SuFEx and SuPhenEx click chemistries, this approach utilizes disulfonimidoyl fluorides and disulfonimidoyl p-nitrophenolates─which are efficient building blocks with two chiral sulfur centers, and diphenols to efficiently form novel S-O bonds. Characteristic results include the enantiospecific one-step synthesis of rings consisting of 21-58 members and characterization of both enantiomers (R,R and S,S) by e.g. X-ray crystallography.
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Affiliation(s)
- Yang Chao
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China
| | - Muthusamy Subramaniam
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708WE Wageningen, The Netherlands
| | - Kayambu Namitharan
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708WE Wageningen, The Netherlands
| | - Yumei Zhu
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China
| | - Victor Koolma
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708WE Wageningen, The Netherlands
| | - Zitong Hao
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China
| | - Shikang Li
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China
| | - Yaxin Wang
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China
| | - Ilyos Hudoynazarov
- Division
of Organic Synthesis and Applied Chemistry, National University of Uzbekistan, Tashkent 100174, Uzbekistan
| | - Fedor M. Miloserdov
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708WE Wageningen, The Netherlands
| | - Han Zuilhof
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708WE Wageningen, The Netherlands
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9
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Abstract
The oxetane ring is an emergent, underexplored motif in drug discovery that shows attractive properties such as low molecular weight, high polarity, and marked three-dimensionality. Oxetanes have garnered further interest as isosteres of carbonyl groups and as molecular tools to fine-tune physicochemical properties of drug compounds such as pKa, LogD, aqueous solubility, and metabolic clearance. This perspective highlights recent applications of oxetane motifs in drug discovery campaigns (2017-2022), with emphasis on the effect of the oxetane on medicinally relevant properties and on the building blocks used to incorporate the oxetane ring. Based on this analysis, we provide an overview of the potential benefits of appending an oxetane to a drug compound, as well as potential pitfalls, challenges, and future directions.
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Affiliation(s)
- Juan J. Rojas
- Department of Chemistry,
Imperial College London, Molecular Sciences
Research Hub, White City
Campus, Wood Lane, London W12 0BZ, U.K.
| | - James A. Bull
- Department of Chemistry,
Imperial College London, Molecular Sciences
Research Hub, White City
Campus, Wood Lane, London W12 0BZ, U.K.
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10
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Kopyt M, Tryniszewski M, Barbasiewicz M, Kwiatkowski P. Enantioselective Addition of Dialkyl Malonates to β-Arylethenesulfonyl Fluorides under High-Pressure Conditions. Org Lett 2023; 25:6818-6822. [PMID: 37655810 PMCID: PMC10521026 DOI: 10.1021/acs.orglett.3c02302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Indexed: 09/02/2023]
Abstract
Application of high-pressure conditions enables enantioselective Michael-type addition of dialkyl malonates to β-arylethenesulfonyl fluorides. The reaction is efficiently catalyzed with 5 mol % of tertiary amino-thiourea at 9 kbar. Chiral alkanesulfonyl fluorides are formed in yields of up to 96% and enantioselectivities of up to 92%. Functionalization of the adducts via sulfur fluoride exchange (SuFEx) reaction and desulfonylative cyclization is demonstrated.
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Affiliation(s)
- Michał Kopyt
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
- Biological
and Chemical Research Centre, University
of Warsaw, Żwirki
i Wigury 101, 02-089 Warsaw, Poland
| | - Michał Tryniszewski
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Michał Barbasiewicz
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Piotr Kwiatkowski
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
- Biological
and Chemical Research Centre, University
of Warsaw, Żwirki
i Wigury 101, 02-089 Warsaw, Poland
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11
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Wang H, Wu Z, Cao Y, Gao L, Shao J, Zhao Y, Zhang J, Zhou Y, Wei G, Li J, Zhu H. Exploration of novel four-membered-heterocycle constructed peptidyl proteasome inhibitors with improved metabolic stability for cancer treatment. Bioorg Chem 2023; 138:106626. [PMID: 37295239 DOI: 10.1016/j.bioorg.2023.106626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/16/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023]
Abstract
Peptides have limitations as active pharmaceutical agents due to rapid hydrolysis by proteases and poor cell permeability. To overcome these limitations, a series of peptidyl proteasome inhibitors embedded with four-membered heterocycles were designed to enhance their metabolic stabilities. All synthesized compounds were screened for their inhibitory activities against human 20S proteasome, and 12 target compounds displayed potent efficacy with IC50 values lower than 20 nM. Additionally, these compounds exhibited strong anti-proliferative activities against multiple myeloma (MM) cell lines (MM1S: 72, IC50 = 4.86 ± 1.34 nM; RPMI-8226: 67, IC50 = 12.32 ± 1.44). Metabolic stability assessments of SGF, SIF, plasma and blood were conducted, and the representative compound 73 revealed long half-lives (Plasma: T1/2 = 533 min; Blood: T1/2 > 1000 min) and good proteasome inhibitory activity in vivo. These results suggest that compound 73 serve as a lead compound for the development of more novel proteasome inhibitors.
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Affiliation(s)
- Hanlin Wang
- School of Pharmacy, Fudan University, Shanghai 210023, China; State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaoxiao Wu
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou 310015, China; College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yu Cao
- Department of pharmaceutical Preparation, Hangzhou Xixi Hospital, Hangzhou 310023, Zhejiang Province, China
| | - Lixin Gao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, China
| | - Jiaan Shao
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou 310015, China; College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yanmei Zhao
- Department of pharmaceutical Preparation, Hangzhou Xixi Hospital, Hangzhou 310023, Zhejiang Province, China
| | - Jiankang Zhang
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou 310015, China; College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yubo Zhou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gang Wei
- School of Pharmacy, Fudan University, Shanghai 210023, China.
| | - Jia Li
- School of Pharmacy, Fudan University, Shanghai 210023, China; State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Huajian Zhu
- Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province, School of Medicine, Hangzhou City University, Hangzhou 310015, China; College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
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12
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Evarts MM, Strong ZH, Krische MJ. Oxetane-, Azetidine-, and Bicyclopentane-Bearing N-Heterocycles from Ynones: Scaffold Diversification via Ruthenium-Catalyzed Oxidative Alkynylation. Org Lett 2023; 25:5907-5910. [PMID: 37527501 PMCID: PMC10445484 DOI: 10.1021/acs.orglett.3c02213] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
A process for 3-fold scaffold diversification is achieved via ruthenium-catalyzed oxidative alkynylation of commercially available oxetanols, azetidinols and bicyclopentanols to form α,β-acetylenic ketones (ynones), which are subsequently converted to oxetane-, azetidine- and bicyclopentane-bearing pyrazoles, isoxazoles and pyrimidines. A one-pot oxidative alkynylation-condensation protocol that directly converts azetidinols to azetidine-substituted pyrazoles or pyrimidines is demonstrated.
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Affiliation(s)
- Madeline M Evarts
- University of Texas at Austin, Department of Chemistry, Austin, Texas 78712, United States
| | - Zachary H Strong
- University of Texas at Austin, Department of Chemistry, Austin, Texas 78712, United States
| | - Michael J Krische
- University of Texas at Austin, Department of Chemistry, Austin, Texas 78712, United States
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13
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Barbor JP, Nair VN, Sharp KR, Lohrey TD, Dibrell SE, Shah TK, Walsh MJ, Reisman SE, Stoltz BM. Development of a Nickel-Catalyzed N-N Coupling for the Synthesis of Hydrazides. J Am Chem Soc 2023. [PMID: 37413695 PMCID: PMC10360072 DOI: 10.1021/jacs.3c04834] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
A nickel-catalyzed N-N cross-coupling for the synthesis of hydrazides is reported. O-Benzoylated hydroxamates were efficiently coupled with a broad range of aryl and aliphatic amines via nickel catalysis to form hydrazides in an up to 81% yield. Experimental evidence implicates the intermediacy of electrophilic Ni-stabilized acyl nitrenoids and the formation of a Ni(I) catalyst via silane-mediated reduction. This report constitutes the first example of an intermolecular N-N coupling compatible with secondary aliphatic amines.
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Affiliation(s)
- Jay P Barbor
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Vaishnavi N Nair
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Kimberly R Sharp
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Trevor D Lohrey
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sara E Dibrell
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Tejas K Shah
- Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Martin J Walsh
- Corteva Agriscience, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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14
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Zhang Z, Zhang SL, Wu C, Li HH, Zha L, Shi J, Liu X, Qin HL, Tang W. Sulfur-fluoride exchange (SuFEx)-enabled lead discovery of AChE inhibitors by fragment linking strategies. Eur J Med Chem 2023; 257:115502. [PMID: 37224761 DOI: 10.1016/j.ejmech.2023.115502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/06/2023] [Accepted: 05/16/2023] [Indexed: 05/26/2023]
Abstract
SuFEx click chemistry has been a method for the rapid synthesis of functional molecules with desirable properties. Here, we demonstrated a workflow that allows for in situ synthesis of sulfonamide inhibitors based on SuFEx reaction for high-throughput testing of their cholinesterase activity. According to fragment-based drug discovery (FBDD), sulfonyl fluorides [R-SO2F] with moderate activity were identified as fragment hits, rapidly diversified into 102 analogs in SuFEx reactions, and the sulfonamides were directly screened to yield drug-like inhibitors with 70-fold higher potency (IC50 = 94 nM). Moreover, the improved molecule J8-A34 can ameliorate cognitive function in Aβ1-42-induced mouse model. Since this SuFEx linkage reaction succeeds on picomole scale for direct screening, this methodology can accelerate the development of robust biological probes and drug candidates.
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Affiliation(s)
- Ziwen Zhang
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China
| | - Shi-Long Zhang
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China
| | - Chengyao Wu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China
| | - Huan-Huan Li
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China
| | - Liang Zha
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China
| | - Jingbo Shi
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China
| | - Xinhua Liu
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China.
| | - Hua-Li Qin
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430070, China.
| | - Wenjian Tang
- School of Pharmacy, Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, Hefei, 230032, China.
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15
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Dubois MAJ, Rojas JJ, Sterling AJ, Broderick HC, Smith MA, White AJP, Miller PW, Choi C, Mousseau JJ, Duarte F, Bull JA. Visible Light Photoredox-Catalyzed Decarboxylative Alkylation of 3-Aryl-Oxetanes and Azetidines via Benzylic Tertiary Radicals and Implications of Benzylic Radical Stability. J Org Chem 2023; 88:6476-6488. [PMID: 36868184 DOI: 10.1021/acs.joc.3c00083] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Four-membered heterocycles offer exciting potential as small polar motifs in medicinal chemistry but require further methods for incorporation. Photoredox catalysis is a powerful method for the mild generation of alkyl radicals for C-C bond formation. The effect of ring strain on radical reactivity is not well understood, with no studies that address this question systematically. Examples of reactions that involve benzylic radicals are rare, and their reactivity is challenging to harness. This work develops a radical functionalization of benzylic oxetanes and azetidines using visible light photoredox catalysis to prepare 3-aryl-3-alkyl substituted derivatives and assesses the influence of ring strain and heterosubstitution on the reactivity of small-ring radicals. 3-Aryl-3-carboxylic acid oxetanes and azetidines are suitable precursors to tertiary benzylic oxetane/azetidine radicals which undergo conjugate addition into activated alkenes. We compare the reactivity of oxetane radicals to other benzylic systems. Computational studies indicate that Giese additions of unstrained benzylic radicals into acrylates are reversible and result in low yields and radical dimerization. Benzylic radicals as part of a strained ring, however, are less stable and more π-delocalized, decreasing dimer and increasing Giese product formation. Oxetanes show high product yields due to ring strain and Bent's rule rendering the Giese addition irreversible.
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Affiliation(s)
- Maryne A J Dubois
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Juan J Rojas
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Alistair J Sterling
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, U.K
| | - Hannah C Broderick
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Milo A Smith
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Philip W Miller
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Chulho Choi
- Pfizer Global Research and Development, 445 Eastern Point Rd., Groton, Connecticut 06340, United States
| | - James J Mousseau
- Pfizer Global Research and Development, 445 Eastern Point Rd., Groton, Connecticut 06340, United States
| | - Fernanda Duarte
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, U.K
| | - James A Bull
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
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16
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Bull JA. Synthesis of aza-S(VI) motifs. PHOSPHORUS SULFUR 2023. [DOI: 10.1080/10426507.2023.2175827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- James A. Bull
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, London, UK
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17
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Erchinger JE, Hoogesteger R, Laskar R, Dutta S, Hümpel C, Rana D, Daniliuc CG, Glorius F. EnT-Mediated N-S Bond Homolysis of a Bifunctional Reagent Leading to Aliphatic Sulfonyl Fluorides. J Am Chem Soc 2023; 145:2364-2374. [PMID: 36652725 DOI: 10.1021/jacs.2c11295] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Sulfur(VI) fluoride exchange (SuFEx) gives rise to a plethora of high-valent sulfur linkages; however, the availability of (aliphatic) sulfonyl fluoride manifolds lag behind, owing to the limited sources of introducing the SO2F moiety via a classical two-electron approach. Recently, radical-based methodologies have emerged as a complementary strategy to increase the diversity of accessible click partners. In this work, synthesis of a bench-stable sulfamoyl fluoride reagent is presented, which may undergo sigma-bond homolysis upon visible-light-induced sensitization to form protected β-amino sulfonyl fluorides from alkene feedstocks. Notably, this offers an appealing strategy to access various building blocks for peptido sulfonyl fluorides, relevant in a medicinal chemistry context, as well as an intriguing entry to β-ammonium sulfonates and β-sultams, from alkenes. Densely functionalized 1,3-sultones were obtained by employing allyl alcohols as substrates. Surprisingly, allyl chloride-derived β-imino sulfonyl fluoride underwent S-O bond formation and ring closure to yield rigid cyclopropyl β-imino sulfonate ester under SuFEx conditions. Furthermore, by engaging a thiol-based hydrogen atom donor in the reaction, the reactivity of the same reagent can be tuned toward the direct synthesis of aliphatic sulfonyl fluorides. Mechanistic experiments indicate an energy transfer (EnT)-mediated process. The transient sulfonyl fluoride radical adds to the alkene and product formation occurs upon either radical-radical coupling or hydrogen atom transfer (HAT), respectively.
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Affiliation(s)
- Johannes E Erchinger
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Reece Hoogesteger
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Ranjini Laskar
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Subhabrata Dutta
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Carla Hümpel
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Debanjan Rana
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany
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18
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Wang YC, Xiao ZX, Wang M, Yang SQ, Liu JB, He ZT. Umpolung Asymmetric 1,5-Conjugate Addition via Palladium Hydride Catalysis. Angew Chem Int Ed Engl 2023; 62:e202215568. [PMID: 36374273 DOI: 10.1002/anie.202215568] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Indexed: 11/16/2022]
Abstract
Electronically matched nucleophilic 1,6-conjugate addition has been well studied and widely applied in synthetic areas. In contrast, nucleophilic 1,5-conjugate addition represents an electronically forbidden process and is considered unfeasible. Here, we describe modular protocols for 1,5-conjugate addition reactions via palladium hydride catalysis. Both palladium and synergistic Pd/organocatalyst systems are developed to catalyze 1,5-conjugate reaction, followed by inter- or intramolecular [3+2] cyclization. A migratory 1,5-addition protocol is established to corroborate the feasibility of this umpolung concept. The 1,5-addition products are conveniently transformed into a series of privileged enantioenriched motifs, including polysubstituted tetrahydrofuran, dihydrofuran, cyclopropane, cyclobutane, azetidine, oxetane, thietane, spirocycle and bridged rings. Preliminary mechanistic studies corroborate the involvement of palladium hydride catalysis.
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Affiliation(s)
- Yu-Chao Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhao-Xin Xiao
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Miao Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Shao-Qian Yang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
| | - Jin-Biao Liu
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhi-Tao He
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai, 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
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19
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Roberts DD, McLaughlin MG. Diastereoselective access to substituted oxetanes via hydrosilylation-iodocyclisation of homopropargylic alcohols. Chem Commun (Camb) 2022; 58:8376-8379. [PMID: 35792361 DOI: 10.1039/d2cc03339a] [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
The regio and stereoselective hydrosilylation of a variety of homopropargylic alcohols and their derivatives is described. The reaction is tolerant to a variety of sterically and electronically varied substrates, affording only the E-vinyl silane as a sole regioisomer. The application of the resultant vinyl silanes towards the diastereoselective synthesis of tetrasubstituted oxetanes is demonstrated.
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Affiliation(s)
- Dean D Roberts
- Department of Chemistry, University of Lancaster, Bailrigg, Lancashire, LA14YB, UK.
| | - Mark G McLaughlin
- Department of Chemistry, University of Lancaster, Bailrigg, Lancashire, LA14YB, UK.
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20
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Bajohr J, Böhme MD, Gao J, Hahn FE, Lautens M. Palladium-Catalyzed Three-Component Dearomatization/Sulfonylation Cascade. Org Lett 2022; 24:3823-3827. [PMID: 35604037 DOI: 10.1021/acs.orglett.2c01382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The diastereoselective synthesis of sulfonylated indolines is reported. A palladium-catalyzed dearomative sulfination of (aza)indole-tethered aryl iodides generates reactive benzylic sulfinates. These intermediates react with electrophiles in a one-pot, two-step process to generate sulfonylated products in good yields and excellent diastereoselectivity. This three-component sequence demonstrates good scalability and can be applied toward the synthesis of sulfonamides. Additionally, further derivatizations of aryl iodide containing products furnish spiro- and alkynylated indoline products.
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Affiliation(s)
- Jonathan Bajohr
- Department of Chemistry, Davenport Research Laboratories, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Matthias D Böhme
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, 48149, Münster, Germany
| | - Jiacheng Gao
- Department of Chemistry, Davenport Research Laboratories, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - F Ekkehardt Hahn
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, 48149, Münster, Germany
| | - Mark Lautens
- Department of Chemistry, Davenport Research Laboratories, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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21
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Stafford NP, Cheng MJ, Dinh DN, Verboom KL, Krische MJ. Chiral α-Stereogenic Oxetanols and Azetidinols via Alcohol-Mediated Reductive Coupling of Allylic Acetates: Enantiotopic π-Facial Selection in Symmetric Ketone Addition. ACS Catal 2022; 12:6172-6179. [PMID: 37063244 PMCID: PMC10104534 DOI: 10.1021/acscatal.2c01647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iridium-tol-BINAP-catalyzed reductive coupling of allylic acetates with oxetanones and azetidinones mediated by 2-propanol provides chiral α-stereogenic oxetanols and azetidinols. As illustrated in 50 examples, complex, nitrogen-rich substituents that incorporate the top 10 N-heterocycles found in FDA-approved drugs are tolerated. In addition to 2-propanol-mediated reductive couplings, oxetanols and azetidinols may serve dually as reductant and ketone proelectrophiles in redox-neutral C-C couplings via hydrogen auto-transfer, as demonstrated by the conversion of dihydro-1a and dihydro-1b to adducts 3a and 4a, respectively. The present method delivers hitherto inaccessible chiral oxetanols and azetidinols, which are important bioisosteres.
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Affiliation(s)
- Nicholas P. Stafford
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Melinda J. Cheng
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Duong Nguyen Dinh
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Katherine L. Verboom
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Michael J. Krische
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
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22
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Rojas JJ, Torrisi E, Dubois MAJ, Hossain R, White AJP, Zappia G, Mousseau JJ, Choi C, Bull JA. Oxetan-3-ols as 1,2-bis-Electrophiles in a Brønsted-Acid-Catalyzed Synthesis of 1,4-Dioxanes. Org Lett 2022; 24:2365-2370. [PMID: 35311271 PMCID: PMC9007565 DOI: 10.1021/acs.orglett.2c00568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Annulations
that combine diacceptors with bis-nucleophiles are
uncommon. Here, we report the synthesis of 1,4-dioxanes from 3-aryloxetan-3-ols,
as 1,2-bis-electrophiles and 1,2-diols. Brønsted acid Tf2NH catalyzes both the selective activation of the oxetanol,
to form an oxetane carbocation that reacts with the diol, and intramolecular
ring opening of the oxetane. High regio- and diastereoselectivity
are achieved with unsymmetrical diols. The substituted dioxanes and
fused bicyclic products present interesting motifs for drug discovery
and can be further functionalized.
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Affiliation(s)
- Juan J. Rojas
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Elena Torrisi
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
- Department of Biomolecular Sciences, School of Pharmacy, University of Urbino “Carlo Bo”, P.za Rinascimento, 6, 61029 Urbino (PU), Italy
| | - Maryne A. J. Dubois
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Riashat Hossain
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
| | - Giovanni Zappia
- Department of Biomolecular Sciences, School of Pharmacy, University of Urbino “Carlo Bo”, P.za Rinascimento, 6, 61029 Urbino (PU), Italy
| | - James J. Mousseau
- Pfizer Worldwide Research, Development and Medical, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Chulho Choi
- Pfizer Worldwide Research, Development and Medical, Eastern Point Road, Groton, Connecticut 06340, United States
| | - James A. Bull
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K
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23
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Affiliation(s)
- Malcolm P Huestis
- Discovery Chemistry Department, Genentech, San Francisco, California, USA.
| | - Jack A Terrett
- Discovery Chemistry Department, Genentech, San Francisco, California, USA.
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