1
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Irie Y, Yokoshima S. Total Synthesis of Putative Melognine. J Am Chem Soc 2024; 146:9526-9531. [PMID: 38546412 DOI: 10.1021/jacs.4c02086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Total synthesis of melognine was accomplished. A 10-membered cyclic alkyne was prepared via an intramolecular SN2 reaction of a nosylamide. Enyne metathesis of the cyclic alkyne under an atmosphere of ethylene afforded a 1,3-diene. Intramolecular cycloaddition of a nitrone and an azomethine ylide with the 1,3-diene moiety constructed the characteristic highly fused skeleton. Further transformation, including ring-closing metathesis, resulted in the synthesis of melognine, whose NMR spectra did not match the reported data. Close inspection of the spectra of melognine in the literature suggested that the structure of melognine might be identical with that of a known alkaloid, melodinine L.
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Affiliation(s)
- Yui Irie
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
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2
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Forshaw S, Parker JS, Scott WT, Knighton RC, Tiwari N, Oladeji SM, Stevens AC, Chew YM, Reber J, Clarkson GJ, Balasubramanian MK, Wills M. Increasing the versatility of the biphenyl-fused-dioxacyclodecyne class of strained alkynes. Org Biomol Chem 2024; 22:590-605. [PMID: 38131271 PMCID: PMC10792613 DOI: 10.1039/d3ob01712e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 12/08/2023] [Indexed: 12/23/2023]
Abstract
Biphenyl-fused-dioxacyclodecynes are a promising class of strained alkyne for use in Cu-free 'click' reactions. In this paper, a series of functionalised derivatives of this class of reagent, containing fluorescent groups, are described. Studies aimed at understanding and increasing the reactivity of the alkynes are also presented, together with an investigation of the bioconjugation of the reagents with an azide-labelled protein.
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Affiliation(s)
- Sam Forshaw
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Jeremy S Parker
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Macclesfield, SK10 2NA, UK
| | - William T Scott
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
- Warwick Medical School, The University of Warwick, Coventry, CV4 7AL, UK
| | - Richard C Knighton
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
- School of Chemistry, University of Southampton, SO17 1BJ, UK
| | - Neelam Tiwari
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Samson M Oladeji
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Andrew C Stevens
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Yean Ming Chew
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
- Warwick Medical School, The University of Warwick, Coventry, CV4 7AL, UK
| | - Jami Reber
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
| | - Guy J Clarkson
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
| | | | - Martin Wills
- Department of Chemistry, The University of Warwick, Coventry, CV4 7AL, UK.
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3
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Zielke FM, Rutjes FPJT. Recent Advances in Bioorthogonal Ligation and Bioconjugation. Top Curr Chem (Cham) 2023; 381:35. [PMID: 37991570 PMCID: PMC10665463 DOI: 10.1007/s41061-023-00445-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 10/23/2023] [Indexed: 11/23/2023]
Abstract
The desire to create biomolecules modified with functionalities that go beyond nature's toolbox has resulted in the development of biocompatible and selective methodologies and reagents, each with different scope and limitations. In this overview, we highlight recent advances in the field of bioconjugation from 2016 to 2023. First, (metal-mediated) protein functionalization by exploiting the specific reactivity of amino acids will be discussed, followed by novel bioorthogonal reagents for bioconjugation of modified biomolecules.
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Affiliation(s)
- Florian M Zielke
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Floris P J T Rutjes
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands.
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4
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Das E, Feliciano MAM, Yamanushkin P, Lin X, Gold B. Oxa-azabenzobenzocyclooctynes (O-ABCs): heterobiarylcyclooctynes bearing an endocyclic heteroatom. Org Biomol Chem 2023; 21:8857-8862. [PMID: 37881858 DOI: 10.1039/d3ob01559a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
We report the synthesis of heterobiarylcyclooctynes bearing an endocyclic heteroatom, oxa-azabenzobenzocyclooctynes (O-ABCs). The integration of design strategies for accelerating strain-promoted azide-alkyne cycloadditions results in reactivity with organic azides that surpasses all cyclooctyne reagents reported to date. O-ABCs and related compounds provide insights into the effects of structural modifications on reactivity that can aid in the design of new reagents for click and bioorthogonal chemistry.
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Affiliation(s)
- Eshani Das
- Department of Chemistry and Chemical Biology, University of New Mexico, New Mexico, 87131, USA
| | - Mark Aldren M Feliciano
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, 88003, USA.
- Department of Chemistry and Chemical Biology, University of New Mexico, New Mexico, 87131, USA
| | - Pavel Yamanushkin
- Department of Chemistry and Chemical Biology, University of New Mexico, New Mexico, 87131, USA
| | - Xinsong Lin
- Department of Chemistry and Biochemistry Florida State University, Tallahassee, FL, 32306, USA
| | - Brian Gold
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, 88003, USA.
- Department of Chemistry and Chemical Biology, University of New Mexico, New Mexico, 87131, USA
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5
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Kawasaki Y, Hayashibara T, Seto Y, Taniguchi Y, Igawa K, Tomooka K. Development of DACN-NHS-ester and DACN-maleimide, and their application for the synthesis of artificial hybrid biomolecules. Chem Commun (Camb) 2023; 59:11724-11727. [PMID: 37702377 DOI: 10.1039/d3cc03023g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
DACN-NHS-ester and DACN-maleimide were developed as molecular connectors and applied for the synthesis of artificial hybrid biomolecules in two steps, including, step 1: connection to a corresponding molecule via the NHS ester or maleimide unit, followed by step 2: connection to a corresponding azido-containing molecule via DACN unit by copper-free-alkyne-azide-cycloaddition.
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Affiliation(s)
- Yuuya Kawasaki
- Institute for Materials Chemistry and Engineering, and IRCCS, Kyushu University, Kasuga, Fukuoka 816-8580, Japan.
| | - Tomoya Hayashibara
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Yuki Seto
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Yutaro Taniguchi
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, and IRCCS, Kyushu University, Kasuga, Fukuoka 816-8580, Japan.
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, and IRCCS, Kyushu University, Kasuga, Fukuoka 816-8580, Japan.
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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6
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Vidyakina AA, Shtyrov AA, Ryazantsev MN, Khlebnikov AF, Kolesnikov IE, Sharoyko VV, Spiridonova DV, Balova IA, Bräse S, Danilkina NA. Development of Fluorescent Isocoumarin-Fused Oxacyclononyne - 1,2,3-Triazole Pairs. Chemistry 2023; 29:e202300540. [PMID: 37293937 DOI: 10.1002/chem.202300540] [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: 02/18/2023] [Revised: 06/02/2023] [Accepted: 06/09/2023] [Indexed: 06/10/2023]
Abstract
Fluorescent isocoumarin-fused cycloalkynes, which are reactive in SPAAC and give fluorescent triazoles regardless of the azide nature, have been developed. The key structural feature that converts the non-fluorescent cycloalkyne/triazole pair to its fluorescent counterpart is the pi-acceptor group (COOMe, CN) at the C6 position of the isocoumarin ring. The design of the fluorescent cycloalkyne/triazole pairs is based on the theoretical study of the S1 state deactivation mechanism of the non-fluorescent isocoumarin-fused cycloalkyne IC9O using multi-configurational ab initio and DFT methodologies. The calculations revealed that deactivation proceeds through the electrocyclic ring opening of the α-pyrone cycle and is accompanied by a redistribution of electron density in the fused benzene ring. We proposed that the S1 excited state deactivation barrier could be increased by introducing a pi-acceptor group into a position that is in direct conjugation with the formed C=O group and has a reduced electron density in the transition state. As a proof of concept, we designed and synthesized two fluorescent isocoumarin-fused cycloalkynes IC9O-COOMe and IC9O-CN bearing pi-acceptors at the C6 position. The importance of the nature of a pi-acceptor group was shown by the example of much less fluorescent CF3 -substituted cycloalkyne IC9O-CF3 .
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Affiliation(s)
- Aleksandra A Vidyakina
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
| | - Andrey A Shtyrov
- Nanotechnology Research and Education Centre RAS, Saint Petersburg Academic University, Sankt-Peterburg, 194021 Saint Petersburg, Russia
| | - Mikhail N Ryazantsev
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
- Nanotechnology Research and Education Centre RAS, Saint Petersburg Academic University, Sankt-Peterburg, 194021 Saint Petersburg, Russia
| | - Alexander F Khlebnikov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
| | - Ilya E Kolesnikov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
| | - Vladimir V Sharoyko
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
| | - Dar'ya V Spiridonova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
| | - Irina A Balova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany
- Institute of Biological and Chemical Systems-, Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Natalia A Danilkina
- Institute of Chemistry, Saint Petersburg State University (SPbU), Sankt-Peterburg, 199034 Saint Petersburg, Russia
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7
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Anderson TE, Thamattoor DM, Phillips DL. Formation of 3-Oxa- and 3-Thiacyclohexyne from Ring Expansion of Heterocyclic Alkylidene Carbenes: A Mechanistic Study. Org Lett 2023; 25:1364-1369. [PMID: 36856659 PMCID: PMC10012261 DOI: 10.1021/acs.orglett.3c00042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
The rearrangement pathways of two alkylidene carbenes appended to an oxa or thiacyclopentane into the corresponding heterocyclohexynes were elucidated using 13C-labeling experiments. Both carbenes exhibited a preference for migration of the allylic carbon bound to the heteroatom. Anomeric interactions involving a heteroatom lone pair and antibonding orbital of the migrating bond and inductive destabilization of the minor migratory pathway are discussed as plausible reasons for the observed trends.
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Affiliation(s)
- T E Anderson
- Department of Chemistry, Colby College, 5765 Mayflower Hill, Waterville, Maine 04901, USA
| | - Dasan M Thamattoor
- Department of Chemistry, Colby College, 5765 Mayflower Hill, Waterville, Maine 04901, USA
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Pok Fu Lam 999077, Hong Kong S.A.R
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8
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Schlesinger M, Jentschel C, Pietzsch HJ, Kopka K, Mamat C. Copper-free click bioconjugation of technetium-99m complexes using strained cyclononyne derivatives. Dalton Trans 2023; 52:3024-3032. [PMID: 36779384 DOI: 10.1039/d2dt03965f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Click chemistry, in particular copper-free click reactions, has gained growing interest for radiolabelling purposes in the field of radiopharmaceutical sciences. [99mTc][Tc(CO)3(H2O)3]+ works as an excellent starting complex for the radiolabelling of biomolecules under mild conditions. A new chelator, investigated for the copper-free strain-promoted cycloaddition (SPAAC), was synthesised containing the 2,2'-dipicolylamine (DPA) moiety for the 99mTc-tricarbonyl core and compared with a DPA chelator based on activated esters for conventional radiolabelling. For the copper-free click labelling procedure, a DPA containing 4,8-diazacyclononyne moiety was prepared from a sulfonyl-modified diamide (four steps, 64% yield) followed by the Nicholas reaction with butyne-1,3-diol. The 99mTc-DPA-DACN-complex was prepared with a radiochemical conversion (RCC) of 89% after 30 min. The following SPAAC reaction with an azide-functionalised PSMA molecule was performed within 4-5 hours at 100 °C to obtain the PSMA (prostate-specific membrane antigen) targeting 99mTc-complex with 79% RCC and without side products. For comparison, a second DPA-chelator based on a tetrafluorophenyl (TFP) ester was prepared (three steps, 64% yield) and was successfully radiolabelled with [[99mTc]Tc(CO)3(H2O)3]+ with 89% RCC after 20 min and >99% radiochemical purity after separation using an RP18 cartridge. The subsequent conjugation of an amine-functionalised PSMA targeting molecule was performed with 23% RCC after 150 min. Two other unknown side products were observed indicating the decomposition of the TFP ester during the labelling. All nonradioactive Re(CO)3 complexes were synthesised from (Et4N)2[ReBr3(CO)3] (91% yield for the natRe-DPA-TFP ester, 76% yield for natRe-DPA-DACN) and characterised to confirm the identity of the 99mTc-complexes.
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Affiliation(s)
- Marlene Schlesinger
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Radiopharmazeutische Krebsforschung, Bautzner Landstraße 400, D-01328 Dresden, Germany. .,Universität Leipzig, Fakultät für Chemie und Mineralogie, Johannisallee 29, D-04103 Leipzig, Germany
| | - Christian Jentschel
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Radiopharmazeutische Krebsforschung, Bautzner Landstraße 400, D-01328 Dresden, Germany.
| | - Hans-Jürgen Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Radiopharmazeutische Krebsforschung, Bautzner Landstraße 400, D-01328 Dresden, Germany.
| | - Klaus Kopka
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Radiopharmazeutische Krebsforschung, Bautzner Landstraße 400, D-01328 Dresden, Germany. .,Technische Universität Dresden, Fakultät Chemie und Lebensmittelchemie, D-01062 Dresden, Germany
| | - Constantin Mamat
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Radiopharmazeutische Krebsforschung, Bautzner Landstraße 400, D-01328 Dresden, Germany. .,Technische Universität Dresden, Fakultät Chemie und Lebensmittelchemie, D-01062 Dresden, Germany
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9
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Sakata Y, Nabekura R, Hazama Y, Hanya M, Nishiyama T, Kii I, Hosoya T. Synthesis of Functionalized Dibenzoazacyclooctynes by a Decomplexation Method for Dibenzo-Fused Cyclooctyne-Cobalt Complexes. Org Lett 2023; 25:1051-1055. [PMID: 36511709 DOI: 10.1021/acs.orglett.2c03832] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A concise route for dibenzoazacyclooctynes (DIBACs) synthesis was developed based on Pictet-Spengler reaction and a novel cobalt decomplexation method established for dibenzo-fused cyclooctyne-cobalt complexes. The method allowed for the facile preparation of functionalized DIBACs, including bisDIBAC, which served as an efficient bisreactive linker for protein modification via the double-click reaction.
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Affiliation(s)
- Yuki Sakata
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Ryoto Nabekura
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Yuki Hazama
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Miho Hanya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takashi Nishiyama
- Laboratory for Drug Target Research, Department of Agriculture, Graduate School of Science and Technology, Shinshu University, 8304 Minami-Minowa, Kami-Ina, Nagano 399-4598, Japan
| | - Isao Kii
- Laboratory for Drug Target Research, Department of Agriculture, Graduate School of Science and Technology, Shinshu University, 8304 Minami-Minowa, Kami-Ina, Nagano 399-4598, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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10
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Holzmann MJ, Khanal N, Yamanushkin P, Gold B. Remote Strain Activation in a Sulfate-Linked Dibenzocycloalkyne. Org Lett 2023; 25:309-313. [PMID: 36455206 DOI: 10.1021/acs.orglett.2c03397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Cycloalkynes and their utilization in cycloaddition reactions enable modular strategies spanning the molecular sciences. Strain─imparted by deviation from linearity─enables sufficient alkyne reactivity without the need for a catalyst (e.g., copper); however, the design and synthesis of stable reagents with suitable reactivity remains an ongoing challenge. We report the incorporation of an endocyclic sulfate within a dibenzocyclononyne scaffold to generate a cyclononyne displaying remarkable reactivity and stability. Through computational analyses, we revealed that the endocyclic sulfate group shares nearly half the total strain energy, providing an activation strategy that reduces alkyne bending. Rehybridization of alkyne carbons in the formation of the heterocyclic product relieves strain both at the reactive site and in the transannular sulfate group. This mode of remote activation enables rapid reactivity while minimizing distortion─and strain─at the reactive site (the alkyne). The result: a design strategy for a new class of cycloalkynes with increased stability and reactivity.
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Affiliation(s)
- Michael J Holzmann
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Namrata Khanal
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Pavel Yamanushkin
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Brian Gold
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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11
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Brauer J, Mötzing M, Gröst C, Hoffmann R, Berg T. Templated Generation of a Bcl-x L Inhibitor by Isomer-Free SPAAC Based on Azacyclonon-5-yne. Chemistry 2022; 28:e202202259. [PMID: 35989238 PMCID: PMC9827882 DOI: 10.1002/chem.202202259] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Indexed: 01/12/2023]
Abstract
High-affinity inhibitors of large protein-protein interactions often have a high molecular weight, which compromises their cell permeability and oral bioavailability. We recently presented isomer-free, strain-promoted azide-alkyne cycloaddition (iSPAAC) as a method by which to generate large, chemically uniform bioactive molecules inside living cells from two smaller components with higher cell permeability. Here, we present the synthesis of Fmoc-protected azacyclonon-5-yne (Fmoc-ACN) as the first cyclononyne suitable for iSPAAC. ACN facilitated the structure-guided development of a single-digit micromolar triazole inhibitor of the protein-protein interaction domain of the antiapoptotic protein Bcl-xL . Inhibitor formation in aqueous buffer at 37 °C, templated by the target protein Bcl-xL , proceeded 2800 times faster than the reaction between Fmoc-ACN and benzyl azide under standard conditions in acetonitrile. Our data demonstrate the utility of cyclononynes for iSPAAC and their potential for achieving vastly accelerated templated reactions in aqueous environments.
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Affiliation(s)
- Juliane Brauer
- Institute of Organic ChemistryLeipzig UniversityJohannisallee 2904103LeipzigGermany
| | - Marina Mötzing
- Institute of Bioanalytical Chemistry andCenter for Biotechnology and BiomedicineLeipzig UniversityDeutscher Platz 504103LeipzigGermany
| | - Corinna Gröst
- Institute of Organic ChemistryLeipzig UniversityJohannisallee 2904103LeipzigGermany
| | - Ralf Hoffmann
- Institute of Bioanalytical Chemistry andCenter for Biotechnology and BiomedicineLeipzig UniversityDeutscher Platz 504103LeipzigGermany
| | - Thorsten Berg
- Institute of Organic ChemistryLeipzig UniversityJohannisallee 2904103LeipzigGermany
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12
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Functionalized 10-Membered Aza- and Oxaenediynes through the Nicholas Reaction. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27186071. [PMID: 36144808 PMCID: PMC9502870 DOI: 10.3390/molecules27186071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/17/2022]
Abstract
The scope and limitations of the Nicholas-type cyclization for the synthesis of 10-membered benzothiophene-fused heterocyclic enediynes with different functionalities were investigated. Although the Nicholas cyclization through oxygen could be carried out in the presence of an ester group, the final oxaenediyne was unstable under storage. Among the N-type Nicholas reactions, cyclization via an arenesulfonamide functional group followed by mild Co-deprotection was found to be the most promising, yielding 10-membered azaendiynes in high overall yields. By contrast, the Nicholas cyclization through the acylated nitrogen atom did not give the desired 10-membered cycle. It resulted in the formation of a pyrroline ring, whereas cyclization via an alkylated amino group resulted in a poor yield of the target 10-membered enediyne. The acylated 4-aminobenzenesulfonamide nucleophilic group was found to be the most convenient for the synthesis of functionalized 10-membered enediynes bearing a clickable function, such as a terminal triple bond. All the synthesized cyclic enediynes exhibited moderate activity against lung carcinoma NCI-H460 cells and had a minimal effect on lung epithelial-like WI-26 VA4 cells and are therefore promising compounds in the search for novel antitumor agents that can be converted into conjugates with tumor-targeting ligands.
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13
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Tomooka K. Enjoyable Encounter. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University
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14
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Tsuda T, Arai A, Kita M. Ligand-Dissociation-Type N,N-Dimethylaminopyrene Probes for in situ Site-Specific Protein Labeling. Chem Asian J 2022; 17:e202200631. [PMID: 35862122 DOI: 10.1002/asia.202200631] [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: 06/15/2022] [Revised: 07/15/2022] [Indexed: 11/10/2022]
Abstract
To develop practical methods for in situ labeling of target proteins and to analyze their binding modes with bioactive ligands, 6 N , N -dimethylaminopyrene- N -acyl- N -alkylsulfonamide-4,8diazacyclononyne (dmpy-NASA-DACN) tags were synthesized. Strain-promoted azide-alkyne cyclization with azide-conjugated ligands (biotin and sulfonamide) gave ligand-dissociation-type dmpy probes. With these probes, specific labeling of avidin and human carboxylase 1 (hCA1) proceeded even in the presence of cell lysate proteins in ca. 10% RIPA buffer. Affinity purification, in-gel tryptic digestion on polystyrene gel, and MALDI MS analysis established the dmpylabeled positions of target proteins. Molecular modeling studies also supported why the dmpy-labeling reactions proceeded sitespecifically near ligand-binding sites on the target proteins. Our findings might contribute to the development of chemical probes that specifically label various biomacromolecules in cells.
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Affiliation(s)
- Tomohito Tsuda
- Nagoya University: Nagoya Daigaku, Bioagricultural Sciences, JAPAN
| | - Atsushi Arai
- Nagoya University: Nagoya Daigaku, Bioagricultural Sciences, JAPAN
| | - Masaki Kita
- Nagoya University, Bioagricultural Sciences, Furo-cho, Chikusa, 464-8601, Nagoya, JAPAN
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15
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Rothman JH. Synthesis of Endocyclic Cycloalkyne Amino Acids. ACS OMEGA 2022; 7:9053-9060. [PMID: 35309419 PMCID: PMC8928491 DOI: 10.1021/acsomega.2c00270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
"Click-ligation" is a widely adopted and valuable means to ligate biomolecules whereby two appended biologically inert moieties, such as alkynes and azides, link by cycloaddition. For terminal alkynes, Cu+1 catalysis is required which degrades oligonucleotides by catalyzing their hydrolysis but is also physiologically incompatible. The smallest activated alkynes that do not require Cu+1 catalysis are cyclooctynes or dibenzo-cyclooctynes. For this purpose, there are commercially available nucleosides and amino acids that are appended to these moieties. However, these structures are bulky, dissimilar to native amino acids, and when incorporated within biological molecules could likely perturb native structural configuration. Presented are the syntheses of structural analogues of proline with an inserted propargyl moiety within a series of ring sizes. Moreover, a synthetic pathway to medium-size ring heterocycloalkynes mediated by using mild Mitsunobu conditions in tandem with a Nicholas-related strategy for cyclization is introduced. Avoiding the usual harsh acidic conditions for the Nicholas reaction allows improved functional group compatibility.
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Affiliation(s)
- Jeffrey H. Rothman
- Herbert
Irving Comprehensive Cancer Center, Department of Medicine, Columbia University Medical Center, 1130 St. Nicholas Avenue, New York, New York 10032, United States
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16
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Hosseinnejad T, Omrani-Pachin M. Quantum chemistry study on the promoted reactivity of substituted cyclooctynes in bioorthogonal cycloaddition reactions. HETEROCYCL COMMUN 2021. [DOI: 10.1515/hc-2020-0129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
In the present research, we focus on the energetics and electronic aspects of enhanced reactivity in the regioselective bioorthogonal 1,3-dipolar cycloaddition reaction of various substituted cyclooctynes with methyl azide, applying quantum chemistry approaches. In this respect, we assessed the structural and energetic properties of regioisomeric products and their corresponded transition states and calculated the reaction electronic energy changes and energy barriers through the cycloaddition pathways. The obtained results revealed that the trifluoromethyl substitution and fluorination of cyclooctynes lead to improved reactivity, in conjunction with increased exothermicity and decreased activation energy values. On the other hand, quantum theory of atoms in molecules computations were performed on some key bond and ring critical points that demonstrated the stabilizing topological properties of electron density and its derivatives upon trifluoromethyl substitution and fluorination of propargylic carbon of cyclooctynes which can be regarded as the essential origin of enhanced reactivity.
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Affiliation(s)
- Tayebeh Hosseinnejad
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University , Vanak , Tehran , Iran
| | - Marzieh Omrani-Pachin
- Department of Chemistry, Faculty of Physics and Chemistry, Alzahra University , Vanak , Tehran , Iran
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17
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Taguchi J, Kimura K, Igawa K, Tomooka K, Hosoya T. 3-Azidoarynes: Generation and Regioselective Reactions. CHEM LETT 2021. [DOI: 10.1246/cl.210632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jumpei Taguchi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kota Kimura
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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18
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Danilkina NA, Govdi AI, Khlebnikov AF, Tikhomirov AO, Sharoyko VV, Shtyrov AA, Ryazantsev MN, Bräse S, Balova IA. Heterocycloalkynes Fused to a Heterocyclic Core: Searching for an Island with Optimal Stability-Reactivity Balance. J Am Chem Soc 2021; 143:16519-16537. [PMID: 34582682 DOI: 10.1021/jacs.1c06041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In the search for fundamentally new, active, stable, and readily synthetically accessible cycloalkynes as strain-promoted azide-alkyne cycloaddition (SPAAC) reagents for bioorthogonal bioconjugation, we integrated two common approaches: the reagent destabilization by the increase of a ring strain and the transition state stabilization through electronic effects. As a result new SPAAC reagents, heterocyclononynes fused to a heterocyclic core, were created. These compounds can be obtained through a general synthetic route based on four crucial steps: the electrophile-promoted cyclization, Sonogashira coupling, Nicholas reaction, and final deprotection of Co-complexes of cycloalkynes from cobalt. Varying the natures of the heterocycle and heteroatom allows for reaching the optimal stability-reactivity balance for new strained systems. Computational and experimental studies revealed similar SPAAC reactivities for stable 9-membered isocoumarin- and benzothiophene-fused heterocycloalkynes and their unstable 8-membered homologues. We discovered that close reactivity is a result of the interplay of two electronic effects, which stabilize SPAAC transition states (πin* → σ* and π* → πin*) with structural effects such as conformational changes from eclipsed to staggered conformations in the cycloalkyne scaffold, that noticeably impact alkyne bending and reactivity. The concerted influence of a heterocycle and a heteroatom on the polarization of a triple bond in highly strained cycles along with a low HOMO-LUMO gap was assumed to be the reason for the unpredictable kinetic instability of all the cyclooctynes and the benzothiophene-fused oxacyclononyne. The applicability of stable isocoumarin-fused azacyclononyne IC9N-BDP-FL for in vitro bioconjugation was exemplified by labeling and visualization of HEK293 cells carrying azido-DNA and azido-glycans.
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Affiliation(s)
- Natalia A Danilkina
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Anastasia I Govdi
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Alexander F Khlebnikov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Alexander O Tikhomirov
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Vladimir V Sharoyko
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Andrey A Shtyrov
- Nanotechnology Research and Education Centre RAS, Saint Petersburg Academic University, 8/3 Khlopina Street, 194021 Saint Petersburg, Russia
| | - Mikhail N Ryazantsev
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems-Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Irina A Balova
- Institute of Chemistry, Saint Petersburg State University (SPbU), Universitetskaya nab. 7/9, 199034 Saint Petersburg, Russia
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19
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St Onge B, Green JR. The formation of benzoxacin-3-ones via intramolecular Nicholas reactions and synthesis of 8-membered heliannuols. Org Biomol Chem 2021; 19:7152-7155. [PMID: 34373880 DOI: 10.1039/d1ob01395e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The γ-carbonyl cations generated from propargyl ether-Co2(CO)6 complexes undergo intramolecular Nicholas reactions to give dehydrobenzoxacin-3-one-Co2(CO)6 complexes in good yields. Reductive decomplexation and subsequent manipulation allows the synthesis of (±)-heliannuol K methyl ether and the formal syntheses of (±)-heliannuol K, (±)-heliannuol A, and (-)-heliannuol L.
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Affiliation(s)
- Brent St Onge
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON NB 3P4, Canada.
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20
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Kang D, Cheung ST, Kim J. Bioorthogonal Hydroamination of Push-Pull-Activated Linear Alkynes. Angew Chem Int Ed Engl 2021; 60:16947-16952. [PMID: 34019705 DOI: 10.1002/anie.202104863] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/16/2021] [Indexed: 01/14/2023]
Abstract
A bioorthogonal reaction between N,N-dialkylhydroxylamines and push-pull-activated halogenated alkynes is described. We explore the use of rehybridization effects in activating alkynes, and we show that electronic effects, when competing stereoelectronic and inductive factors are properly balanced, sufficiently activate a linear alkyne in the uncatalyzed conjugative retro-Cope elimination reaction while adequately protecting it against cellular nucleophiles. This design preserves the low steric profile of an alkyne and pairs it with a comparably unobtrusive hydroxylamine. The kinetics are on par with those of the fastest strain-promoted azide-alkyne cycloaddition reactions, the products regioselectively formed, the components sufficiently stable and easily installed, and the reaction suitable for cellular labeling.
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Affiliation(s)
- Dahye Kang
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, 02215, USA.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, 02115, USA
| | - Sheldon T Cheung
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, 02215, USA.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, 02115, USA
| | - Justin Kim
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, 02215, USA.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, 02115, USA
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21
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Hu Y, Schomaker JM. Recent Developments and Strategies for Mutually Orthogonal Bioorthogonal Reactions. Chembiochem 2021; 22:3254-3262. [PMID: 34261195 DOI: 10.1002/cbic.202100164] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/12/2021] [Indexed: 12/23/2022]
Abstract
Over the past decade, several different metal-free bioorthogonal reactions have been developed to enable simultaneous double-click labeling with minimal-to-no competing cross-reactivities; such transformations are termed 'mutually orthogonal'. More recently, several examples of successful triple ligation strategies have also been described. In this minireview, we discuss selected aspects of the development of orthogonal bioorthogonal reactions over the past decade, including general strategies to drive future innovations to achieve simultaneous, mutually orthogonal click reactions in one pot.
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Affiliation(s)
- Yun Hu
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Jennifer M Schomaker
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
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22
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Dones JM, Abularrage NS, Khanal N, Gold B, Raines RT. Acceleration of 1,3-Dipolar Cycloadditions by Integration of Strain and Electronic Tuning. J Am Chem Soc 2021; 143:9489-9497. [PMID: 34151576 DOI: 10.1021/jacs.1c03133] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The 1,3-dipolar cycloaddition between azides and alkynes provides new means to probe and control biological processes. A major challenge is to achieve high reaction rates with stable reagents. The optimization of alkynyl reagents has relied on two strategies: increasing strain and tuning electronics. We report on the integration of these strategies. A computational analysis suggested that a CH → N aryl substitution in dibenzocyclooctyne (DIBO) could be beneficial. In transition states, the nitrogen of 2-azabenzo-benzocyclooctyne (ABC) engages in an n→π* interaction with the C=O of α-azidoacetamides and forms a hydrogen bond with the N-H of α-diazoacetamides. These dipole-specific interactions act cooperatively with electronic activation of the strained π-bond to increase reactivity. We found that ABC does indeed react more quickly with α-azidoacetamides and α-diazoacetamides than its constitutional isomer, dibenzoazacyclooctyne (DIBAC). ABC and DIBAC have comparable chemical stability in a biomimetic solution. Both ABC and DIBO are accessible in three steps by the alkylidene carbene-mediated ring expansion of commercial cycloheptanones. Our findings enhance the accessibility and utility of 1,3-dipolar cycloadditions and encourage further innovation.
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Affiliation(s)
- Jesús M Dones
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Nile S Abularrage
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Namrata Khanal
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Brian Gold
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Ronald T Raines
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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23
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Kang D, Cheung ST, Kim J. Bioorthogonal Hydroamination of Push–Pull‐Activated Linear Alkynes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Dahye Kang
- Department of Cancer Biology Dana-Farber Cancer Institute Boston MA 02215 USA
- Department of Biological Chemistry and Molecular Pharmacology Harvard Medical School Boston MA 02115 USA
| | - Sheldon T. Cheung
- Department of Cancer Biology Dana-Farber Cancer Institute Boston MA 02215 USA
- Department of Biological Chemistry and Molecular Pharmacology Harvard Medical School Boston MA 02115 USA
| | - Justin Kim
- Department of Cancer Biology Dana-Farber Cancer Institute Boston MA 02215 USA
- Department of Biological Chemistry and Molecular Pharmacology Harvard Medical School Boston MA 02115 USA
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24
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Aimi T, Meguro T, Kobayashi A, Hosoya T, Yoshida S. Nucleophilic transformations of azido-containing carbonyl compounds via protection of the azido group. Chem Commun (Camb) 2021; 57:6062-6065. [PMID: 34036976 DOI: 10.1039/d1cc01143j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nucleophilic transformations of azido-containing carbonyl compounds are discussed. The phosphazide formation from azides and di(tert-butyl)(4-(dimethylamino)phenyl)phosphine (Amphos) enabled transformations of carbonyl groups with nucleophiles such as lithium aluminum hydride and organometallic reagents. The good stability of the phosphazide moiety allowed us to perform consecutive transformations of a diazide through triazole formation and the Grignard reaction.
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Affiliation(s)
- Takahiro Aimi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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25
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Monzón DM, Betancort JM, Martín T, Ramírez MÁ, Martín VS, Díaz Díaz D. Intramolecular Nicholas Reaction Enables the Stereoselective Synthesis of Strained Cyclooctynes. Molecules 2021; 26:molecules26061629. [PMID: 33804118 PMCID: PMC7999112 DOI: 10.3390/molecules26061629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/12/2021] [Accepted: 03/13/2021] [Indexed: 12/23/2022] Open
Abstract
Cyclic products can be obtained through the intramolecular version of the Nicholas reaction, which requires having the nucleophile connected to the alkyne unit. Here, we report the synthesis of 1-oxa-3-cyclooctynes starting from commercially available (1R,3S)-camphoric acid. The strategy is based on the initial preparation of propargylic alcohols, complexation of the triple bond with Co2(CO)8, and treatment with BF3·Et2O to induce an intramolecular Nicholas reaction with the free hydroxyl group as nucleophile. Finally, oxidative deprotection of the alkyne afforded the cyclooctynes in good yields. Notably, large-sized R substituents at the chiral center connected to the O atom were oriented in such a way that steric interactions were minimized in the cyclization, allowing the formation of cyclooctynes exclusively with (R) configuration, in good agreement with theoretical predictions. Moreover, preliminary studies demonstrated that these cyclooctynes were reactive in the presence of azides yielding substituted triazoles.
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Affiliation(s)
- Diego M. Monzón
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (D.M.M.); (M.Á.R.)
- Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (J.M.B.); (T.M.)
| | - Juan Manuel Betancort
- Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (J.M.B.); (T.M.)
| | - Tomás Martín
- Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (J.M.B.); (T.M.)
- Instituto de Productos Naturales y Agrobiología, CSIC, Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Miguel Ángel Ramírez
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (D.M.M.); (M.Á.R.)
- Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (J.M.B.); (T.M.)
| | - Víctor S. Martín
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (D.M.M.); (M.Á.R.)
- Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (J.M.B.); (T.M.)
- Correspondence: (V.S.M.); (D.D.D.)
| | - David Díaz Díaz
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (D.M.M.); (M.Á.R.)
- Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain; (J.M.B.); (T.M.)
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
- Correspondence: (V.S.M.); (D.D.D.)
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26
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Deb T, Tu J, Franzini RM. Mechanisms and Substituent Effects of Metal-Free Bioorthogonal Reactions. Chem Rev 2021; 121:6850-6914. [DOI: 10.1021/acs.chemrev.0c01013] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Titas Deb
- Department of Medicinal Chemistry, University of Utah, 30 S 2000 E, Salt Lake City, Utah 84112, United States
| | - Julian Tu
- Department of Medicinal Chemistry, University of Utah, 30 S 2000 E, Salt Lake City, Utah 84112, United States
| | - Raphael M. Franzini
- Department of Medicinal Chemistry, University of Utah, 30 S 2000 E, Salt Lake City, Utah 84112, United States
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27
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Affiliation(s)
- Junko Ohkanda
- Academic Assembly, Institute of Agriculture, Shinshu University, 8304 Minami-Minowa, Kami-Ina, Nagano 399-4598, Japan
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28
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Oloyede HO, Akong Akong R, Woods JAO, Görls H, Plass W, Eseola AO. New Bidentate N-Sulfonyl-Substituted Aromatic Amines as Chelate Ligand Backbones: Pd Catalyst Generation in C–C Coupling via In Situ and Precatalyst Modes. Aust J Chem 2021. [DOI: 10.1071/ch19668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A series of six new, bidentate ligands based on N-(2-(R-sulfonamido)benzyl)R-sulfonamide have been isolated as dianionic or monoanionic chelators via condensation of 2-(aminomethyl)aniline with sulfonyl chloride reagents; R=methyl (1 and 1′), tolyl (2 and 2′), 2,4,6-trimethylphenyl (3), or 2,4,6-triisopropylphenyl (4). Complexes of ligands 2–4 reacted at room temperature with palladium(ii) acetate in the presence of various monodentate N-donor co-ligands to form complexes Pd2(2dmap), Pd2′(OAc.py), Pd3(2acn), Pd3(2py), Pd4(2acn), and Pd4(2py), which were structurally confirmed by three X-ray crystal analyses. Results of catalysis studies in water showed high turnover frequencies and yields of up to 98% within 10min and at 0.2 mol-% palladium catalyst loading. Relative to ligand-free catalysis in the presence of only Pd(OAc)2, the ligand-supported palladium species clearly possess positive catalytic advantage. Furthermore, Suzuki coupling efficiencies by 1:1 ‘Pd(OAc)2+ligand’ yielded notably better outcomes than for the 1:2 ‘Pd(OAc)2+ligand’ insitu catalyst generation, which reveals that coordinative saturation is undesirable. The size of the complementing monodentate co-ligand was observed to influence the catalytic efficiency such that bulkier co-ligands consistently yielded improved turnover frequency values, which leads to the conclusion that steric repulsion between the synthesised ligands and the bulkier co-ligands aided the generation of vacant coordination sites for the more active complexes. Moderate Heck coupling activity was recorded for the complexes and better activities appear to correlate with moderate bulkiness of ligand 3.
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29
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Zhang X, Lin L, Li J, Duan S, Long Y, Li J. Recent Progress in the Synthesis of Medium-Sized Ring and Macrocyclic Compounds. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Takemura H, Goto S, Hosoya T, Yoshida S. 2-Azidoacrylamides as compact platforms for efficient modular synthesis. Chem Commun (Camb) 2020; 56:15541-15544. [PMID: 33241832 DOI: 10.1039/d0cc07212e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Efficient methods to assemble modules with compact platform molecules by triazole formations and Michael reactions are disclosed. The good electrophilicity of 2-triazolylacrylamides realized Michael additions using various nucleophiles. An iterative synthesis of a tetrakis(triazole) was accomplished by orthogonal triazole formations and Michael reactions.
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Affiliation(s)
- Hinano Takemura
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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31
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Lossouarn A, Renard PY, Sabot C. Tailored Bioorthogonal and Bioconjugate Chemistry: A Source of Inspiration for Developing Kinetic Target-Guided Synthesis Strategies. Bioconjug Chem 2020; 32:63-72. [PMID: 33232599 DOI: 10.1021/acs.bioconjchem.0c00568] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Kinetic target-guided synthesis (KTGS) is a promising tool for the discovery of biologically active compounds. It relies on the identification of potent ligands that are covalently assembled by the biological targets themselves from a pool of reagents. Significant effort is devoted to developing new KTGS strategies; however, only a handful of biocompatible reactions are available, which may be insufficient to meet the specificities (stability, dynamics, active site topology, etc.) of a wide range of biological targets with therapeutic potential. This Topical Review proposes a retrospective analysis of existing KTGS ligation tools, in terms of their kinetics and analogy with other biocompatible reactions, and provides new clues to expand the KTGS toolkit. By way of examples, a nonexhaustive selection of such chemical ligation tools belonging to different classes of reactions as promising candidate reactions for KTGS are suggested.
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Affiliation(s)
- Alexis Lossouarn
- Normandie Université, Centre National de la Recherche Scientifique, UNIROUEN, INSA Rouen, COBRA, UMR 6014 & FR 3038, 76000, Rouen, France
| | - Pierre-Yves Renard
- Normandie Université, Centre National de la Recherche Scientifique, UNIROUEN, INSA Rouen, COBRA, UMR 6014 & FR 3038, 76000, Rouen, France
| | - Cyrille Sabot
- Normandie Université, Centre National de la Recherche Scientifique, UNIROUEN, INSA Rouen, COBRA, UMR 6014 & FR 3038, 76000, Rouen, France
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32
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Fernandes RA, Kumar P, Choudhary P. Evolution of Strategies in Protecting‐Group‐Free Synthesis of Natural Products: A Recent Update. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
| | - Praveen Kumar
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
| | - Priyanka Choudhary
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai, Powai Maharashtra India
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33
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Makio N, Sakata Y, Kuribara T, Adachi K, Hatakeyama Y, Meguro T, Igawa K, Tomooka K, Hosoya T, Yoshida S. (Hexafluoroacetylacetonato)copper(I)-cycloalkyne complexes as protected cycloalkynes. Chem Commun (Camb) 2020; 56:11449-11452. [PMID: 32852507 DOI: 10.1039/d0cc05182a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A protection method for cycloalkynes by the formation of (hexafluoroacetylacetonato)copper(i)-cycloalkyne complexes is disclosed. Various complexes having functional groups were efficiently prepared, which are easily purified by silica-gel column chromatography. Selective click reactions were realized through the complexation of cycloalkynes with copper.
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Affiliation(s)
- Naoaki Makio
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Yuki Sakata
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Tomoko Kuribara
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Keisuke Adachi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Yasutomo Hatakeyama
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Tomohiro Meguro
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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34
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Kaneda K. [Synthesis of Cyclic Compounds Containing Aminobenzenesulfonamide]. YAKUGAKU ZASSHI 2020; 140:1087-1094. [PMID: 32879240 DOI: 10.1248/yakushi.20-00139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This review, based on my research work, introduces and summarizes the synthesis and characterization of novel cyclic compounds containing aminobenzenesulfonamide. The review discusses the (1) development of sequential Nicholas and Pauson-Khand reactions for the synthesis of unique polyheterocyclic compounds, (2) production of 2-aminobenzenesulfonamide-containing cyclononyne (ABSACN) as a multifunctional click cycloalkyne agent, and (3) improvement of the intramolecular Pauson-Khand reaction of the nitroarene-enyne substrate for the synthesis of cyclopenta[c]piperidine alkaloids. This research work will facilitate the discovery of sulfonamide or sultam-based functional molecules and pharmaceuticals. Thus, I believe that aminobenzenesulfonamide derivatives are versatile and valuable chemical moieties not only in organic syntheses but also in the pharmaceutical industry. If you are interested in the details of this topic, please refer to the original papers.
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Affiliation(s)
- Kyosuke Kaneda
- Faculty of Pharmaceutical Sciences, Hokkaido University of Science
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35
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Adachi K, Meguro T, Sakata Y, Igawa K, Tomooka K, Hosoya T, Yoshida S. Selective strain-promoted azide-alkyne cycloadditions through transient protection of bicyclo[6.1.0]nonynes with silver or gold. Chem Commun (Camb) 2020; 56:9823-9826. [PMID: 32716445 DOI: 10.1039/d0cc04606j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Complexation of bicyclo[6.1.0]nonynes with a cationic silver or gold salt results in protection from a click reaction with azides. The cycloalkyne protection using the silver or gold salt enables selective strain-promoted azide-alkyne cycloadditions of diynes keeping the bicyclo[6.1.0]nonyne moiety unreacted.
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Affiliation(s)
- Keisuke Adachi
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Tomohiro Meguro
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Yuki Sakata
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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36
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Nguyen SS, Prescher JA. Developing bioorthogonal probes to span a spectrum of reactivities. Nat Rev Chem 2020; 4:476-489. [PMID: 34291176 DOI: 10.1038/s41570-020-0205-0] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Bioorthogonal chemistries enable researchers to interrogate biomolecules in living systems. These reactions are highly selective and biocompatible and can be performed in many complex environments. However, like any organic transformation, there is no perfect bioorthogonal reaction. Choosing the "best fit" for a desired application is critical. Correspondingly, there must be a variety of chemistries-spanning a spectrum of rates and other features-to choose from. Over the past few years, significant strides have been made towards not only expanding the number of bioorthogonal chemistries, but also fine-tuning existing reactions for particular applications. In this Review, we highlight recent advances in bioorthogonal reaction development, focusing on how physical organic chemistry principles have guided probe design. The continued expansion of this toolset will provide more precisely tuned reagents for manipulating bonds in distinct environments.
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Affiliation(s)
- Sean S Nguyen
- Departments of Chemistry, University of California, Irvine, California 92697, United States
| | - Jennifer A Prescher
- Departments of Chemistry, University of California, Irvine, California 92697, United States.,Molecular Biology & Biochemistry, University of California, Irvine, California 92697, United States.,Pharmaceutical Sciences, University of California, Irvine, California 92697, United States
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Siddiqui AM, Khalid A, Khan A, Azad CS, Samim M, Khan IA. N‐Heterocyclic Carbene/Cobalt Cooperative Catalysis for the Chemo‐ and Regioselective C−N Bond Formation between Aldehyde and Amines/Amides. ChemCatChem 2020. [DOI: 10.1002/cctc.202000156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Asher M. Siddiqui
- Department of Chemistry School of Chemical and Life Sciences Jamia Hamdard New Delhi 110062 India
| | - Anam Khalid
- Department of Chemistry School of Chemical and Life Sciences Jamia Hamdard New Delhi 110062 India
| | - Arif Khan
- Department of Chemistry School of Chemical and Life Sciences Jamia Hamdard New Delhi 110062 India
| | - Chandra S. Azad
- School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P.R. China
| | - Mohd. Samim
- Department of Chemistry School of Chemical and Life Sciences Jamia Hamdard New Delhi 110062 India
| | - Imran A. Khan
- Department of Chemistry School of Chemical and Life Sciences Jamia Hamdard New Delhi 110062 India
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Sugahara T, Espinosa Ferao A, Rey Planells A, Guo JD, Aoyama S, Igawa K, Tomooka K, Sasamori T, Hashizume D, Nagase S, Tokitoh N. 1,2-Insertion reactions of alkynes into Ge-C bonds of arylbromogermylene. Dalton Trans 2020; 49:7189-7196. [PMID: 32415829 DOI: 10.1039/d0dt01223h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,2-Insertion reactions of alkynes into the Ge-C bonds in dibromodigermenes afford stable crystalline bromovinylgermylenes. In contrast to previously reported Lewis-base-supported vinylgermylenes, the bromovinylgermylene obtained from reaction of the bromogermylene with 3-hexyne via such an 1,2-insertion is a donor-free monomer. A feasible reaction mechanism, proposed on the basis of the observed experimental results in combination with theoretical calculations, suggests that the [1+2]-cycloadduct and the insertion product are the kinetic and thermodynamic product, respectively.
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Affiliation(s)
- Tomohiro Sugahara
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
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Hioki Y, Mori A, Okano K. Steric effects on deprotonative generation of cyclohexynes and 1,2-cyclohexadienes from cyclohexenyl triflates by magnesium amides. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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40
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Yoshida S. Sequential conjugation methods based on triazole formation and related reactions using azides. Org Biomol Chem 2020; 18:1550-1562. [PMID: 32016260 DOI: 10.1039/c9ob02698c] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The recent remarkable progress in azide chemistry has realized sequential conjugation methods with selective 1,2,3-triazole formation. On the basis of the diverse reactivities of azides and azidophiles, including terminal alkynes and cyclooctynes, various selective reactions to furnish triazoles and a wide range of platform molecules, such as diynes, diazides, triynes, and triazides, have been developed so far for bis- and tris(triazole) syntheses. This review highlights recent transformations involving selective triazole formation, allowing the efficient preparation of unsymmetric bis- and tris(triazole)s using diverse platform molecules.
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Affiliation(s)
- Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan.
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41
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Theoretical kinetic and thermodynamic studies of the strain energies and ring size effects of the 1,3-dipolar cycloaddition reactions on ethinamate medicine analogs. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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42
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Masuda R, Kawasaki Y, Igawa K, Manabe Y, Fujii H, Kato N, Tomooka K, Ohkanda J. Copper‐Free Huisgen Cycloaddition for the 14‐3‐3‐Templated Synthesis of Fusicoccin‐Peptide Conjugates. Chem Asian J 2020; 15:742-747. [DOI: 10.1002/asia.202000042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Ryoma Masuda
- Academic AssemblyInstitute of AgricultureShinshu University 8304 Minami-Minowa Kami-Ina Nagano 399-4598 Japan
| | - Yuuya Kawasaki
- Institute for Materials Chemistry and EngineeringKyushu University Kasuga-koen 6–1 Kasuga Fukuoka 816-8580 Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and EngineeringKyushu University Kasuga-koen 6–1 Kasuga Fukuoka 816-8580 Japan
| | - Yoshiyuki Manabe
- Department of ChemistryGraduate School of ScienceOsaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Hiroshi Fujii
- Academic AssemblyInstitute of AgricultureShinshu University 8304 Minami-Minowa Kami-Ina Nagano 399-4598 Japan
| | - Nobuo Kato
- The Institute of Scientific Industrial ResearchOsaka University 8-1 Mihogaoka Ibaraki Osaka 567-0047 Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and EngineeringKyushu University Kasuga-koen 6–1 Kasuga Fukuoka 816-8580 Japan
| | - Junko Ohkanda
- Academic AssemblyInstitute of AgricultureShinshu University 8304 Minami-Minowa Kami-Ina Nagano 399-4598 Japan
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43
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Meguro T, Sakata Y, Morita T, Hosoya T, Yoshida S. Facile assembly of three cycloalkyne-modules onto a platform compound bearing thiophene S,S-dioxide moiety and two azido groups. Chem Commun (Camb) 2020; 56:4720-4723. [DOI: 10.1039/d0cc01810d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient method to assemble three cycloalkyne-modules onto a platform bearing a thiophene S,S-dioxide moiety and two azido groups has been developed. The sequential reactions without catalysis or additives enabled the facile preparation of trifunctional molecules by a simple procedure.
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Affiliation(s)
- Tomohiro Meguro
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University (TMDU)
- 2-3-10 Kanda-Surugadai
- Chiyoda-ku
- Tokyo 101-0062
| | - Yuki Sakata
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University (TMDU)
- 2-3-10 Kanda-Surugadai
- Chiyoda-ku
- Tokyo 101-0062
| | - Takamoto Morita
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University (TMDU)
- 2-3-10 Kanda-Surugadai
- Chiyoda-ku
- Tokyo 101-0062
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University (TMDU)
- 2-3-10 Kanda-Surugadai
- Chiyoda-ku
- Tokyo 101-0062
| | - Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering
- Tokyo Medical and Dental University (TMDU)
- 2-3-10 Kanda-Surugadai
- Chiyoda-ku
- Tokyo 101-0062
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44
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Zeng Q, Dong K, Pei C, Dong S, Hu W, Qiu L, Xu X. Divergent Construction of Macrocyclic Alkynes via Catalytic Metal Carbene C(sp2)–H Insertion and the Buchner Reaction. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04199] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Qian Zeng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Kuiyong Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Chao Pei
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Shanliang Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Wenhao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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45
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Yoshida S, Goto S, Nishiyama Y, Hazama Y, Kondo M, Matsushita T, Hosoya T. Effect of Resonance on the Clickability of Alkenyl Azides in the Strain-promoted Cycloaddition with Dibenzo-fused Cyclooctynes. CHEM LETT 2019. [DOI: 10.1246/cl.190400] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Suguru Yoshida
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Sayuri Goto
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Yoshitake Nishiyama
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Yuki Hazama
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Masakazu Kondo
- Ichihara Research Center, JNC Petrochemical Corporation, 5-1 Goikaigan, Ichihara, Chiba 290-8551, Japan
| | - Takeshi Matsushita
- Ichihara Research Center, JNC Petrochemical Corporation, 5-1 Goikaigan, Ichihara, Chiba 290-8551, Japan
| | - Takamitsu Hosoya
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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46
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Synthesis and Properties of 6-Aryl-4-azidocinnolines and 6-Aryl-4-(1,2,3-1 H-triazol-1-yl)cinnolines. Molecules 2019; 24:molecules24132386. [PMID: 31252657 PMCID: PMC6651781 DOI: 10.3390/molecules24132386] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 06/24/2019] [Accepted: 06/24/2019] [Indexed: 01/23/2023] Open
Abstract
An efficient approach towards the synthesis of 6-aryl-4-azidocinnolines was developed with the aim of exploring the photophysical properties of 6-aryl-4-azidocinnolines and their click reaction products with alkynes, 6-aryl-4-(1,2,3-1H-triazol-1-yl)cinnolines. The synthetic route is based on the Richter-type cyclization of 2-ethynyl-4-aryltriazenes with the formation of 4-bromo-6-arylcinnolines and nucleophilic substitution of a bromine atom with an azide functional group. The developed synthetic approach is tolerant to variations of functional groups on the aryl moiety. The resulting azidocinnolines were found to be reactive in both CuAAC with terminal alkynes and SPAAC with diazacyclononyne, yielding 4-triazolylcinnolines. It was found that 4-azido-6-arylcinnolines possess weak fluorescent properties, while conversion of the azido function into a triazole ring led to complete fluorescence quenching. The lack of fluorescence in triazoles could be explained by the non-planar structure of triazolylcinnolines and a possible photoinduced electron transfer (PET) mechanism. Among the series of 4-triazolylcinnoline derivatives a compound bearing hydroxyalkyl substituent at triazole ring was found to be cytotoxic to HeLa cells.
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Kawasaki Y, Yamanaka Y, Seto Y, Igawa K, Tomooka K. Synthesis of NMs-DACN: Small and Hydrophilic Click Reaction Device. CHEM LETT 2019. [DOI: 10.1246/cl.190026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yuuya Kawasaki
- Institute for Materials Chemistry and Engineering, and IRCCS, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Yuki Yamanaka
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Yuki Seto
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, and IRCCS, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, and IRCCS, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
- Department of Molecular and Material Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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48
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Harris T, Alabugin IV. Strain and stereoelectronics in cycloalkyne click chemistry. MENDELEEV COMMUNICATIONS 2019. [DOI: 10.1016/j.mencom.2019.05.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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49
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Hamlin TA, Levandowski BJ, Narsaria AK, Houk KN, Bickelhaupt FM. Structural Distortion of Cycloalkynes Influences Cycloaddition Rates both by Strain and Interaction Energies. Chemistry 2019; 25:6342-6348. [PMID: 30779472 PMCID: PMC6519225 DOI: 10.1002/chem.201900295] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/16/2019] [Indexed: 12/27/2022]
Abstract
The reactivities of 2‐butyne, cycloheptyne, cyclooctyne, and cyclononyne in the 1,3‐dipolar cycloaddition reaction with methyl azide were evaluated through DFT calculations at the M06‐2X/6‐311++G(d)//M06‐2X/6‐31+G(d) level of theory. Computed activation free energies for the cycloadditions of cycloalkynes are 16.5–22.0 kcal mol−1 lower in energy than that of the acyclic 2‐butyne. The strained or predistorted nature of cycloalkynes is often solely used to rationalize this significant rate enhancement. Our distortion/interaction–activation strain analysis has been revealed that the degree of geometrical predistortion of the cycloalkyne ground‐state geometries acts to enhance reactivity compared with that of acyclic alkynes through three distinct mechanisms, not only due to (i) a reduced strain or distortion energy, but also to (ii) a smaller HOMO–LUMO gap, and (iii) an enhanced orbital overlap, which both contribute to more stabilizing orbital interactions.
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Affiliation(s)
- Trevor A Hamlin
- Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Brian J Levandowski
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA
| | - Ayush K Narsaria
- Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands.,Institute for Molecules and Materials (IMM), Radboud University of Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
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50
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Ring Expansion of Alkylidenecarbenes Derived from Lactams, Lactones, and Thiolactones into Strained Heterocyclic Alkynes: A Theoretical Study. Molecules 2019; 24:molecules24030593. [PMID: 30736417 PMCID: PMC6384652 DOI: 10.3390/molecules24030593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 02/06/2019] [Accepted: 02/06/2019] [Indexed: 12/20/2022] Open
Abstract
Strained cycloalkynes are of considerable interest to theoreticians and experimentalists, and possess much synthetic value as well. Herein, a series of cyclic alkylidenecarbenes—formally obtained by replacing the carbonyl oxygen of four-, five-, and six-membered lactams, lactones, and thiolactones with a divalent carbon—were modeled at the CCSD(T)/cc-pVTZ//B3LYP/6-311+G** and CCSD(T)/cc-pVTZ//CCSD/6-311+G** levels of theory. The singlet carbenes were found to be more stable than the triplets. The strained heterocyclic alkynes formed by ring expansion of these singlet carbenes were also modeled. Interestingly, the C≡C bonds in the five-membered heterocycles, obtained from the rearrangement of β-lactam- and β-lactone-derived alkylidenecarbenes, displayed lengths intermediate between formal double and triple bonds. Furthermore, 2-(1-azacyclobutylidene)carbene was found to be nearly isoenergetic with its ring-expanded isomer, and 1-oxacyclopent-2-yne was notably higher in energy than its precursor carbene. In all other cases, the cycloalkynes were lower in energy than the corresponding carbenes. The transition states for ring-expansion were always lower for the 1,2-carbon shifts than for 1,2-nitrogen or oxygen shifts, but higher than for the 1,2-sulfur shifts. These predictions should be verifiable using carbenes bearing appropriate isotopic labels. Computed vibrational spectra for the carbenes, and their ring-expanded isomers, are presented and could be of value to matrix isolation experiments.
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