1
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Henry JM, Milne D, Perkins D, Hicks W, Hose DRJ, Campbell AD, Mullen AK, Inglesby PA, Raw SA, Jones MF. Exploiting the Physical Properties of Diethanolamine Boronic Esters for Process Improvements in AZD5718. Org Process Res Dev 2023. [DOI: 10.1021/acs.oprd.2c00342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Affiliation(s)
- Jean-Marc Henry
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - David Milne
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Dave Perkins
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - William Hicks
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - David R. J. Hose
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Andrew D. Campbell
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Alexander K. Mullen
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Phillip A. Inglesby
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Steven A. Raw
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Martin F. Jones
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
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2
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Hazra S, Mahato S, Kanti Das K, Panda S. Transition-Metal-Free Heterocyclic Carbon-Boron Bond Formation. Chemistry 2022; 28:e202200556. [PMID: 35438817 DOI: 10.1002/chem.202200556] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 12/16/2022]
Abstract
Heteroaryl boronic acids and esters are extremely important and valuable intermediates because of their wide application in the synthesis of marketed drugs and bioactive compounds. Over the last couple of decades, the construction of highly important heteroaryl carbon-boron bonds has created huge attention. The transition-metal-free protocols are more green, less sensitive to air and moisture, and also economically advantageous over the transition-metal-based protocols. The transition-metal-free C-H borylation of heteroarenes and C-X (X=halogen) borylation of heteroaryl halides represents an excellent approach for their synthesis. Also, various cyclization and alkyne activation protocols have been recently established for their synthesis. The goal of this review article is to summarize the existing literature and the current state of the art for transition-metal-free synthesis of heteroaryl boronic acid and esters.
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Affiliation(s)
- Subrata Hazra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Somenath Mahato
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Kanak Kanti Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Santanu Panda
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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3
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Chen PJ, Kelly AM, Blair DJ, Burke MD. Preparation of MIDA Anhydride and Reaction with Boronic Acids. ORGANIC SYNTHESES; AN ANNUAL PUBLICATION OF SATISFACTORY METHODS FOR THE PREPARATION OF ORGANIC CHEMICALS 2022; 99:92-112. [PMID: 37587918 PMCID: PMC10428519 DOI: 10.15227/orgsyn.099.0092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Affiliation(s)
- Peng-Jui Chen
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, IL 61801, USA
| | - Aidan M. Kelly
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, IL 61801, USA
| | - Daniel J. Blair
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, IL 61801, USA
| | - Martin D. Burke
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 S Mathews Avenue, Urbana, IL 61801, USA
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4
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Trobe M, Schreiner T, Vareka M, Grimm S, Wölfl B, Breinbauer R. A Modular Synthesis of Teraryl-Based α-Helix Mimetics, Part 5: A Complete Set of Pyridine Boronic Acid Pinacol Esters Featuring Side Chains of Proteinogenic Amino Acids. European J Org Chem 2022; 2022:e202101280. [PMID: 35910461 PMCID: PMC9304165 DOI: 10.1002/ejoc.202101280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 02/08/2022] [Indexed: 11/30/2022]
Abstract
Teraryl-based α-helix mimetics have proven to be useful compounds for the inhibition of protein-protein interactions (PPI). We have developed a modular and flexible approach for the synthesis of teraryl-based α-helix mimetics using pyridine containing boronic acid building blocks to increase the water solubility. Following our initial publication in which we have introduced the methodology in combination with sequential Pd-catalyzed cross-coupling for teraryl assembly, we can now report a complete set of pyridine based boronic acid building blocks decorated with side chains of all proteinogenic amino acids relevant for PPI (Ala, Arg, Asn, Asp, Cys, Gln, Glu, His, Ile, Leu, Lys, Met, Phe, Ser, Thr, Trp, Tyr, Val) to complement the core fragment set. For a representative set of teraryls we have studied the influence of the pyridine rings on the solubility of the assembled oligoarenes.
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Affiliation(s)
- Melanie Trobe
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Till Schreiner
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Martin Vareka
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Sebastian Grimm
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Bernhard Wölfl
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Rolf Breinbauer
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
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5
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Mahamudul Hassan MM, Mondal B, Singh S, Haldar C, Chaturvedi J, Bisht R, Sunoj RB, Chattopadhyay B. Ir-Catalyzed Ligand-Free Directed C–H Borylation of Arenes and Pharmaceuticals: Detailed Mechanistic Understanding. J Org Chem 2022; 87:4360-4375. [DOI: 10.1021/acs.joc.2c00046] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Biplab Mondal
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Sukriti Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Chabush Haldar
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Jagriti Chaturvedi
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Raghavan B. Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
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6
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Volochnyuk DM, Gorlova AO, Grygorenko OO. Saturated Boronic Acids, Boronates, and Trifluoroborates: An Update on Their Synthetic and Medicinal Chemistry. Chemistry 2021; 27:15277-15326. [PMID: 34499378 DOI: 10.1002/chem.202102108] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Indexed: 12/13/2022]
Abstract
This review discusses recent advances in the chemistry of saturated boronic acids, boronates, and trifluoroborates. Applications of the title compounds in the design of boron-containing drugs are surveyed, with special emphasis on α-amino boronic derivatives. A general overview of saturated boronic compounds as modern tools to construct C(sp3 )-C and C(sp3 )-heteroatom bonds is given, including recent developments in the Suzuki-Miyaura and Chan-Lam cross-couplings, single-electron-transfer processes including metallo- and organocatalytic photoredox reactions, and transformations of boron "ate" complexes. Finally, an attempt to summarize the current state of the art in the synthesis of saturated boronic acids, boronates, and trifluoroborates is made, with a brief mention of the "classical" methods (transmetallation of organolithium/magnesium reagents with boron species, anti-Markovnikov hydroboration of alkenes, and the modification of alkenyl boron compounds) and a special focus on recent methodologies (boronation of alkyl (pseudo)halides, derivatives of carboxylic acids, alcohols, and primary amines, boronative C-H activation, novel approaches to alkene hydroboration, and 1,2-metallate-type rearrangements).
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Affiliation(s)
- Dmitriy M Volochnyuk
- Enamine Ltd. (www.enamine.net), Chervonotkatska 78, Kyiv, 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv, 01601, Ukraine.,Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv, 02094, Ukraine
| | - Alina O Gorlova
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv, 02094, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska 78, Kyiv, 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv, 01601, Ukraine
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7
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Kassel VM, Hanneman CM, Delaney CP, Denmark SE. Heteroaryl-Heteroaryl, Suzuki-Miyaura, Anhydrous Cross-Coupling Reactions Enabled by Trimethyl Borate. J Am Chem Soc 2021; 143:13845-13853. [PMID: 34415757 PMCID: PMC8892994 DOI: 10.1021/jacs.1c06419] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Reaction conditions have been developed for refractory heteroaryl-heteroaryl Suzuki-Miyaura cross-couplings. The reported method employs neopentyl heteroarylboronic esters as nucleophiles, heteroaryl bromides and chlorides as the electrophiles, and the soluble base potassium trimethylsilanolate (TMSOK) under anhydrous conditions. The addition of trimethyl borate enhances reaction rates by several mechanisms, including (1) solubilization of in situ-generated boronate complexes, (2) preventing catalyst poisoning by the heteroatomic units, and (3) buffering the inhibitory effect of excess TMSOK. The use of this method enables cross-coupling of diverse reaction partners including a broad range of π-rich and π-deficient heteroaryl boronic esters and heteroaryl bromides. Reactions proceed in good yields and short reaction times (3 h or less).
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Affiliation(s)
- Vincent M Kassel
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Christopher M Hanneman
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Connor P Delaney
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Scott E Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
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8
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Abstract
Stereoselective reactions at the anomeric carbon constitute the cornerstone of preparative carbohydrate chemistry. Here, we report stereoselective C-arylation and etherification reactions of anomeric trifluoroborates derived from BMIDA esters. These reactions are characterized by high anomeric selectivities for 2-deoxysugars and broad substrate scope (24 examples), including disaccharides and trifluoroborates with free hydroxyl groups. Taken together, this new class of carbohydrate reagents adds the palette of anomeric nucleophile reagents suitable for efficient installation of C-C bonds.
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Affiliation(s)
- Eric M Miller
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
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9
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Omari I, Yunker LPE, Penafiel J, Gitaari D, San Roman A, McIndoe JS. Dynamic Ion Speciation during the Hydrolysis of Aryltrifluoroborates*. Chemistry 2021; 27:3812-3816. [PMID: 33227160 DOI: 10.1002/chem.202004726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/16/2020] [Indexed: 11/12/2022]
Abstract
Organotrifluoroborates serve as coupling partners during transmetalation in the Suzuki-Miyaura reaction but require hydrolysis prior to the coupling reaction. Their anionic nature allows study of their hydrolysis by electrospray ionization mass spectrometry (ESI-MS) through real-time monitoring, complemented by pH analysis. The induction period varied according to the borates employed, and a dynamic series of equilibria for numerous ions was observed during hydrolysis. We found that the induction periods and reaction rates were sensitive to the R group of the borates, the shape of the reaction vessel, and stir rate.
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Affiliation(s)
- Isaac Omari
- Department of Chemistry, University of Victoria, P.O. Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Lars P E Yunker
- Department of Chemistry, University of Victoria, P.O. Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Johanne Penafiel
- Department of Chemistry, University of Victoria, P.O. Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Darlene Gitaari
- Department of Chemistry, University of Victoria, P.O. Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Atzin San Roman
- Department of Chemistry, University of Victoria, P.O. Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - J Scott McIndoe
- Department of Chemistry, University of Victoria, P.O. Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
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10
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Kelly AM, Chen PJ, Klubnick J, Blair DJ, Burke MD. A Mild Method for Making MIDA Boronates. Org Lett 2020; 22:9408-9414. [DOI: 10.1021/acs.orglett.0c02449] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aidan M. Kelly
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Peng-Jui Chen
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jenna Klubnick
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Daniel J. Blair
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Martin D. Burke
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
- Carle Illinois College of Medicine, 807 South Wright Street, Urbana, Illinois 61820, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana−Champaign, 1206 West Gregory Dr., Urbana, Illinois 61801, United States
- Arnold and Mabel Beckman Institute, University of Illinois at Urbana−Champaign, 405 North Mathews Ave., Urbana, Illinois 61801, United States
- Department of Biochemistry, University of Illinois at Urbana−Champaign, 600 S Mathews Avenue, Urbana, Illinois 61801, United States
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11
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Gulledge Z, Tedder ML, Lyons KR, Carrick JD. Synthesis of Tridentate [1,2,4] Triazinyl-Pyridin-2-yl Indole Lewis Basic Complexants via Pd-Catalyzed Suzuki-Miyaura Cross-Coupling. ACS OMEGA 2019; 4:18855-18866. [PMID: 31737847 PMCID: PMC6854830 DOI: 10.1021/acsomega.9b02891] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 10/14/2019] [Indexed: 06/10/2023]
Abstract
Full closure of the nuclear fuel cycle is predicated, in part, on defining efficient separations processes for the effective speciation of the neutron-absorbing lanthanides from the minor actinides post-PUREX. Pursuant to the aforementioned, a class of tridentate, Lewis basic procomplexants have been prepared leveraging a Pd-catalyzed Suzuki-Miyaura cross-coupling between 6-bromo-[1,2,4]-triazinylpyridine derivatives and various protected indole-boronic acids to afford functionalized 2-[6-(5,6-diphenyl-[1,2,4]triazin-3-yl)-pyridin-2-yl]-1H-indoles. A highly active catalyst/ligand system with low loadings was employed rapidly affording 26 examples in yields as high as 85%. Method optimization, substrate and indole scope, comparative analysis between coupling reagents, and a scale-up experiment are reported.
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12
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Jo YI, Cheon CH. Total Synthesis of Phenanthroquinolizidine Alkaloids Using a Building Block Strategy. J Org Chem 2019; 84:11902-11910. [DOI: 10.1021/acs.joc.9b01768] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Young-In Jo
- Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Cheol-Hong Cheon
- Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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13
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Scattergood PA, Roberts J, Omar SAE, Elliott PIP. Observation of an Inversion in Photophysical Tuning in a Systematic Study of Luminescent Triazole-Based Osmium(II) Complexes. Inorg Chem 2019; 58:8607-8621. [PMID: 31180230 DOI: 10.1021/acs.inorgchem.9b00915] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In a systematic survey of luminescent bis(terdentate) osmium(II) complexes, a tipping point involving a reversal in photophysical tuning is observed whereby increasing stabilization of the ligand-based lowest unoccupied molecular orbital (LUMO) results in a blue shift in the optical absorption and emission bands. The complexes [Os(N^N'^N″)2]2+ [N^N'^N″ = 2,6-bis(1-phenyl-1,2,3-triazol-4-yl)pyridine (Os1), 2,6-bis(1-benzyl-1,2,3-triazol-4-yl)pyrazine (Os2), 6-(1-benzyl-1,2,3-triazol-4-yl)-2,2'-bipyridyl (Os3), 2-(pyrid-2-yl)-6-(1-benzyl-1,2,3-triazol-4-yl)pyrazine (Os4), 2-(pyrazin-2-yl)-6-(1-benzyl-1,2,3-triazol-4-yl)pyridine (Os5), and 6-(1-benzyl-1,2,3-triazol-4-yl)-2,2'-bipyrazinyl (Os6)] have been prepared and characterized, and all complexes display phosphorescence ranging from the orange to near-IR regions of the spectrum. Replacement of the central pyridine in the ligands of Os1 by the more π-accepting pyrazine in Os2 results in a 55 nm red shift in the triplet metal-to-ligand charge-transfer-based emission band, while a larger red shift of 107 nm is observed for the replacement of one of the triazole donors in the ligands of Os1 by a second pyridine ring in Os3 (λemmax = 702 nm). Interestingly, replacement of the central pyridine ring in the ligands of Os3 by pyrazine (Os4, λemmax = 702 nm) fails to result in a further red shift in the emission band. Reversal of the relative positions of the pyridine and pyrazine donors in Os5 (λemmax = 733 nm) compared to Os4 does indeed result in the expected red shift in the emission with respect to that for Os3 based on the increased π-acceptor character of the ligands present. However, an inversion in emission tuning is observed for Os6, in which the incorporation of a second pyrazine donor in the ligand architecture results in a blue shift in the optical absorption and emission maxima (λemmax = 710 nm). Electrochemical studies reveal that while incorporating pyrazine in the ligands indeed results in an expected anodic shift in the first reduction potential through stabilization of the ligand-based LUMO, there is also a concomitant anodic shift in the OsII/OsIII-based oxidation potential. This stabilization of the metal-based highest occupied molecular orbital (HOMO) thus nullifies the effect of stabilization of the LUMO in Os4 compared to Os3, resulting in these complexes having coincident emission maxima. For Os6, stabilization of the HOMO through the incorporation of two pyrazine donors in the ligand structure now exceeds stabilization of the LUMO, resulting in a larger HOMO-LUMO gap and a counterintuitive blue shift in the optical properties in comparison with those of Os5. While it is known that the replacement of ligands (e.g., replacing bipyridyl with bipyrazinyl) can result in a larger HOMO-LUMO energy gap through greater stabilization of the HOMO, these results importantly allow us to capture the tipping point at which this inversion in photophysical tuning occurs. This therefore enables us to explore the limits available in emission tuning with a relatively simple and minimalist ligand structure.
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14
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Jo YI, Burke MD, Cheon CH. Modular Syntheses of Phenanthroindolizidine Natural Products. Org Lett 2019; 21:4201-4204. [DOI: 10.1021/acs.orglett.9b01397] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Young-In Jo
- Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Martin D. Burke
- Department of Chemistry and Carle Illinois College of Medicine, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Cheol-Hong Cheon
- Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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15
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Kamio S, Kageyuki I, Osaka I, Yoshida H. Anthranilamide (aam)-substituted arylboranes in direct carbon–carbon bond-forming reactions. Chem Commun (Camb) 2019; 55:2624-2627. [DOI: 10.1039/c8cc10252j] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Pd-Catalyzed cross-coupling and Rh-catalyzed 1,4-addition with Ar-B(aam) become feasible without the need for prior acidic deprotection
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Affiliation(s)
- Shintaro Kamio
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Ikuo Kageyuki
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Itaru Osaka
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Hiroto Yoshida
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
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16
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Minami Y, Hiyama T. Designing Cross-Coupling Reactions using Aryl(trialkyl)silanes. Chemistry 2018; 25:391-399. [PMID: 30024650 DOI: 10.1002/chem.201803213] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/18/2018] [Indexed: 01/08/2023]
Abstract
Organo(trialkyl)silanes have several advantages, including high stability, low toxicity, good solubility, easy handling, and ready availability compared with heteroatom-substituted silanes. However, methods for the cross-coupling of organo(trialkyl)silanes are limited, most probably because of their exceeding robustness. Thus, a practical method for the cross-coupling of organo(trialkyl)silanes has been a long-standing challenging research target. This article discusses how aryl(trialkyl)silanes can be used in cross-coupling reactions. A pioneering example is CuII catalytic conditions with the use of electron-accepting aryl- or heteroaryl(triethyl)silanes and aryl iodides. The reaction forms biaryls or teraryls. This design concept can be extended to Pd/CuII -catalyzed cross-coupling polymerization reactions between such silanes and aryl bromides or chlorides and to CuI -catalyzed alkylation using alkyl halides.
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Affiliation(s)
- Yasunori Minami
- Research and Development Initiative, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Tamejiro Hiyama
- Research and Development Initiative, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
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17
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Erb W, Hurvois JP, Roisnel T, Dorcet V. Ferroceneboronic Acid and Derivatives: Synthesis, Structure, Electronic Properties, and Reactivity in Directed C–H Bond Activation. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00501] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- William Erb
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Jean-Pierre Hurvois
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Thierry Roisnel
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Vincent Dorcet
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
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18
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Fu Y, Gou B, Shi C, Du Z, Shen T. Copper‐Catalyzed Monoorganylation of Trialkyl Borates with Functionalized Organozinc Pivalates. ChemCatChem 2018. [DOI: 10.1002/cctc.201800939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ying Fu
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R. China
| | - Bei‐Lei Gou
- College of Chemistry and BioengineeringLanzhou Jiaotong University Lanzhou 730070 P.R. China
| | - Chun‐Zhao Shi
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R. China
| | - Zhengyin Du
- College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R. China
| | - Tong Shen
- College of Chemistry and BioengineeringLanzhou Jiaotong University Lanzhou 730070 P.R. China
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19
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Trobe M, Burke MD. The Molecular Industrial Revolution: Automated Synthesis of Small Molecules. Angew Chem Int Ed Engl 2018; 57:4192-4214. [PMID: 29513400 PMCID: PMC5912692 DOI: 10.1002/anie.201710482] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/05/2017] [Indexed: 11/10/2022]
Abstract
Today we are poised for a transition from the highly customized crafting of specific molecular targets by hand to the increasingly general and automated assembly of different types of molecules with the push of a button. Creating machines that are capable of making many different types of small molecules on demand, akin to that which has been achieved on the macroscale with 3D printers, is challenging. Yet important progress is being made toward this objective with two complementary approaches: 1) Automation of customized synthesis routes to different targets by machines that enable the use of many reactions and starting materials, and 2) automation of generalized platforms that make many different targets using common coupling chemistry and building blocks. Continued progress in these directions has the potential to shift the bottleneck in molecular innovation from synthesis to imagination, and thereby help drive a new industrial revolution on the molecular scale.
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Affiliation(s)
- Melanie Trobe
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Martin D. Burke
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA and Carle-Illinois College of Medicine, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA
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20
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Lambert AE, Carrick JD. Diversification of 6‐bromo‐2‐substituted Pyridine Derivatives
via
Suzuki‐Miyaura Cross‐Coupling. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3144] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Abigail E. Lambert
- Department of Chemistry Tennessee Technological University 55 University Drive Cookeville TN 38505‐0001 USA
| | - Jesse D. Carrick
- Department of Chemistry Tennessee Technological University 55 University Drive Cookeville TN 38505‐0001 USA
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21
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Kim H, Lee J, Shin H, Sohn JH. Boric Ester and Thiourea as Coupling Partners in a Copper-Mediated Oxidative Dehydrosulfurative Carbon–Oxygen Cross-Coupling Reaction. Org Lett 2018; 20:1961-1965. [DOI: 10.1021/acs.orglett.8b00502] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyeji Kim
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
| | - Jihong Lee
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
| | - Hyunik Shin
- Yonsung Fine Chemicals R&D Center, 602 Innoplex 2, 306 Sinwon-ro, Yeongtong-gu, Suwon 443-380 Korea
| | - Jeong-Hun Sohn
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
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22
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Trobe M, Burke MD. Die molekulare industrielle Revolution: zur automatisierten Synthese organischer Verbindungen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710482] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Melanie Trobe
- Department of Chemistry University of Illinois Urbana-Champaign 600 S. Mathews, 454 RAL Urbana-Champaign IL 61801 USA
| | - Martin D. Burke
- Department of Chemistry University of Illinois Urbana-Champaign 600 S. Mathews, 454 RAL Urbana-Champaign IL 61801 USA
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23
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Bachon AK, Steinkamp AD, Bolm C. N-Arylated Sulfoximines as Cross-Coupling Building Blocks. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701394] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Anne-Katrin Bachon
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | | | - Carsten Bolm
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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24
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Nguyen MH, O'Brien KT, Smith AB. Design, Synthesis, and Application of Polymer-Supported Silicon-Transfer Agents for Cross-Coupling Reactions with Organolithium Reagents. J Org Chem 2017; 82:11056-11071. [PMID: 28931273 DOI: 10.1021/acs.joc.7b02004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The initial design, synthesis, and validation of polymer-supported siloxane transfer agents have been achieved that permit the direct use of organolithium reagents in the palladium-catalyzed cross-coupling reactions. Through rational design, two generations of polymer support were developed that significantly simplify product purification and the transfer agent recycling.
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Affiliation(s)
- Minh H Nguyen
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Kevin T O'Brien
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Amos B Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
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25
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Foster AB, Bagutski V, Ayuso‐Carrillo JI, Humphries MJ, Ingleson MJ, Turner ML. Use of N-methyliminodiacetic acid boronate esters in suzuki-miyaura cross-coupling polymerizations of triarylamine and fluorene monomers. ACTA ACUST UNITED AC 2017; 55:2798-2806. [PMID: 28979067 PMCID: PMC5600090 DOI: 10.1002/pola.28682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 05/25/2017] [Indexed: 12/18/2022]
Abstract
Polytriarylamine copolymers can be prepared by Suzuki‐Miyaura cross‐coupling reactions of bis N‐methyliminodiacetic acid (MIDA) boronate ester substituted arylamines with dibromo arenes. The roles of solvent composition, temperature, reaction time, and co‐monomer structure were examined and (co)polymers prepared containing 9, 9‐dioctylfluorene (F8), 4‐sec‐butyl or 4‐octylphenyl diphenyl amine (TFB), and N, N′‐bis(4‐octylphenyl)‐N, N′‐diphenyl phenylenediamine (PTB) units, using a Pd(OAc)2/2‐dicyclohexylphosphino‐2′,6′‐dimethoxybiphenyl (SPhos) catalyst system. The performance of a di‐functionalized MIDA boronate ester monomer was compared with that of an equivalent pinacol boronate ester. Higher molar mass polymers were produced from reactions starting with a difunctionalized pinacol boronate ester monomer than the equivalent difunctionalized MIDA boronate ester monomer in biphase solvent mixtures (toluene/dioxane/water). Matrix‐assisted laser desorption/ionization mass spectroscopic analysis revealed that polymeric structures rich in residues associated with the starting MIDA monomer were present, suggesting that homo‐coupling of the boronate ester must be occurring to the detriment of cross‐coupling in the step‐growth polymerization. However, when comparable reactions of the two boronate monomers with a dibromo fluorene monomer were completed in a single phase solvent mixture (dioxane + water), high molar mass polymers with relatively narrow distribution ranges were obtained after only 4 h of reaction. © 2017 The Authors. Journal of Polymer Science Part A: Polymer Chemistry Published by Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2798–2806
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Affiliation(s)
- Andrew B. Foster
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUnited Kingdom
| | - Viktor Bagutski
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUnited Kingdom
| | | | - Martin J. Humphries
- Cambridge Display Technology LtdUnit 12 Cardinal Park, Cardinal Way, GodmanchesterCambridgeshirePE29 2XGUnited Kingdom
| | - Michael J. Ingleson
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUnited Kingdom
| | - Michael L. Turner
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUnited Kingdom
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26
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Rees TW, Liao J, Sinopoli A, Male L, Calogero G, Curchod BFE, Baranoff E. Synthesis and Characterization of a Series of Bis-homoleptic Cycloruthenates with Terdentate Ligands as a Family of Panchromatic Dyes. Inorg Chem 2017; 56:9903-9912. [PMID: 28763219 DOI: 10.1021/acs.inorgchem.7b01412] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of six homoleptic bis-cyclometalated ruthenium complexes, Ru(N^N^C)2, is reported where N^N^C is a 6-(2,4-difluoro-3-R3-phenyl)-4-R2-4'-R1-2,2'-bipyridine with R3 = -H or -CF3 and R2 and R1 = -COOEt or -CF3. An effective synthesis of the ligands and the complexes is described. The UV-visible absorption studies demonstrate that these complexes are panchromatic dyes absorbing up to 900 nm. Importantly, the onset of absorption depends only on the substitution on the metalated phenyl, whereas the intensity of absorption throughout the spectra is a function of substituents on both the phenyl and the bipyridine moieties. The same trend is observed in electrochemistry as the redox gap depends only on the substitution on the metalated phenyl, whereas the oxidation and reduction potentials are a function of substituents on both the phenyl and the bipyridine moieties. Preliminary tests as sensitizer for dye-sensitized solar cells demonstrate that the number of anchoring groups on the dye has a major influence on the device efficiency.
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Affiliation(s)
- Thomas W Rees
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - JinFeng Liao
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K.,Sun Yat-sen University , Guangzhou 510275, P.R. China
| | - Alessandro Sinopoli
- Qatar Environment & Energy Institute (QEERI), Hamad bin Khalifa University (HBKU) , Doha Qatar
| | - Louise Male
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - Giuseppe Calogero
- CNR-IPCF, Istituto per i Processi Chimico-Fisici , Messina 98158, Italy
| | - Basile F E Curchod
- Centre for Computational Chemistry, School of Chemistry, University of Bristol , Bristol BS8 1TS, U.K
| | - Etienne Baranoff
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
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27
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Cheng WM, Shang R, Zhao B, Xing WL, Fu Y. Isonicotinate Ester Catalyzed Decarboxylative Borylation of (Hetero)Aryl and Alkenyl Carboxylic Acids through N-Hydroxyphthalimide Esters. Org Lett 2017; 19:4291-4294. [DOI: 10.1021/acs.orglett.7b01950] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Wan-Min Cheng
- Hefei National Laboratory
for Physical Sciences at the Microscale, CAS Key Laboratory of Urban
Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean
Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
| | - Rui Shang
- Hefei National Laboratory
for Physical Sciences at the Microscale, CAS Key Laboratory of Urban
Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean
Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
| | - Bin Zhao
- Hefei National Laboratory
for Physical Sciences at the Microscale, CAS Key Laboratory of Urban
Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean
Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
| | - Wei-Long Xing
- Hefei National Laboratory
for Physical Sciences at the Microscale, CAS Key Laboratory of Urban
Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean
Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
| | - Yao Fu
- Hefei National Laboratory
for Physical Sciences at the Microscale, CAS Key Laboratory of Urban
Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean
Energy, iChEM, University of Science and Technology of China, Hefei 230026, China
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28
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Kadam AA, Ellern A, Stanley LM. Enantioselective, Palladium-Catalyzed Conjugate Additions of Arylboronic Acids to Form Bis-benzylic Quaternary Stereocenters. Org Lett 2017; 19:4062-4065. [DOI: 10.1021/acs.orglett.7b01825] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abhishek A. Kadam
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Arkady Ellern
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Levi M. Stanley
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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29
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Lu H, Wang S, Li J, Zou D, Wu Y, Wu Y. Efficient synthesis of pyrazine boronic esters via palladium-catalyzed Miyaura borylation. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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30
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Yoshida H, Takemoto Y, Kamio S, Osaka I, Takaki K. Copper-catalyzed direct borylation of alkyl, alkenyl and aryl halides with B(dan). Org Chem Front 2017. [DOI: 10.1039/c7qo00084g] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper-catalyzed reaction of organic halides with an unsymmetrical diboron, (pin)B–B(dan), which leads to the direct formation of masked organoboron compounds, is reported.
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Affiliation(s)
- Hiroto Yoshida
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Yuki Takemoto
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Shintaro Kamio
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Itaru Osaka
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Ken Takaki
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
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31
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Komiyama T, Minami Y, Hiyama T. Recent Advances in Transition-Metal-Catalyzed Synthetic Transformations of Organosilicon Reagents. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02374] [Citation(s) in RCA: 229] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Takeshi Komiyama
- Department
of Applied Chemistry, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Yasunori Minami
- Research
and Development Initiative, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tamejiro Hiyama
- Research
and Development Initiative, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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32
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Komiyama T, Minami Y, Hiyama T. Aryl(triethyl)silanes for Biaryl and Teraryl Synthesis by Copper(II)-Catalyzed Cross-Coupling Reaction. Angew Chem Int Ed Engl 2016; 55:15787-15791. [DOI: 10.1002/anie.201608667] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 10/14/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Takeshi Komiyama
- Department of Applied Chemistry; Chuo University; Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Yasunori Minami
- Research and Development Initiative; Chuo University; Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Tamejiro Hiyama
- Research and Development Initiative; Chuo University; Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
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33
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Komiyama T, Minami Y, Hiyama T. Aryl(triethyl)silanes for Biaryl and Teraryl Synthesis by Copper(II)-Catalyzed Cross-Coupling Reaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608667] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Takeshi Komiyama
- Department of Applied Chemistry; Chuo University; Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Yasunori Minami
- Research and Development Initiative; Chuo University; Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Tamejiro Hiyama
- Research and Development Initiative; Chuo University; Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
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34
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Steinkamp AD, Wiezorek S, Brosge F, Bolm C. Building Block Approach for the Synthesis of Sulfoximines. Org Lett 2016; 18:5348-5351. [DOI: 10.1021/acs.orglett.6b02678] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Anne-Dorothee Steinkamp
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Stefan Wiezorek
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Felix Brosge
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Carsten Bolm
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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35
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Martinez-Solorio D, Melillo B, Sanchez L, Liang Y, Lam E, Houk KN, Smith AB. Design, Synthesis, and Validation of an Effective, Reusable Silicon-Based Transfer Agent for Room-Temperature Pd-Catalyzed Cross-Coupling Reactions of Aryl and Heteroaryl Chlorides with Readily Available Aryl Lithium Reagents. J Am Chem Soc 2016; 138:1836-9. [PMID: 26835838 DOI: 10.1021/jacs.5b13260] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A reusable silicon-based transfer agent (1) has been designed, synthesized, and validated for effective room-temperature palladium-catalyzed cross-coupling reactions (CCRs) of aryl and heteroaryl chlorides with readily accessible aryl lithium reagents. The crystalline, bench-stable siloxane transfer agent (1) is easily prepared via a one-step protocol. Importantly, this "green" CCR protocol circumvents prefunctionalization, isolation of organometallic cross-coupling partners, and/or stoichiometric waste aside from LiCl. DFT calculations support a σ-bond metathesis mechanism during transmetalation and lead to insights on the importance of the CF3 groups.
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Affiliation(s)
- Dionicio Martinez-Solorio
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Bruno Melillo
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Luis Sanchez
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Yong Liang
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Erwin Lam
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Amos B Smith
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
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36
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Chin AL, Carrick JD. Modular Approaches to Diversified Soft Lewis Basic Complexants through Suzuki-Miyaura Cross-Coupling of Bromoheteroarenes with Organotrifluoroborates. J Org Chem 2016; 81:1106-15. [PMID: 26751755 DOI: 10.1021/acs.joc.5b02662] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Remediation or transmutation of spent nuclear fuel obtained as a function of energy production and legacy waste remains a significant environmental concern. Substantive efforts over the last three decades have focused on the potential of soft-Lewis basic complexants for the chemoselective separation of trivalent actinides from lanthanides in biphasic solvent systems. Recent efforts in this laboratory have focused on the concept of modularity to rapidly prepare complexants and complexant scaffolds not easily accessible via traditional linear methods in a convergent manner to better understand solubility and complexation structure/activity function in process-relevant solvents. The current work describes an efficient method for the construction of diversified complexants through multi-Suzuki-Miyaura cross-coupling of bromoheteroarenes with organotrifluoroborates affording efficient access to 22 novel materials in 43-99% yield over two, three, or four cross-couplings on the same scaffold. Optimization of the catalyst/ligand system, application, and limitations are reported herein.
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Affiliation(s)
- Ai Lin Chin
- Department of Chemistry, Tennessee Technological University , 55 University Drive, Cookeville, Tennessee 38501, United States
| | - Jesse D Carrick
- Department of Chemistry, Tennessee Technological University , 55 University Drive, Cookeville, Tennessee 38501, United States
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37
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Crisenza GEM, Dauncey EM, Bower JF. C2-Alkenylation of N-heteroaromatic compounds via Brønsted acid catalysis. Org Biomol Chem 2016; 14:5820-5. [DOI: 10.1039/c6ob00705h] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
C2-alkenylated heteroaromatics can be accessed by simple Brønsted acid catalysed union of diverse heteroarene N-oxides with alkenes. The scope and limitations of the process are outlined.
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38
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Churches QI, Hutton CA. Introduction, Interconversion and Removal of Boron Protecting Groups. BORON REAGENTS IN SYNTHESIS 2016. [DOI: 10.1021/bk-2016-1236.ch011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Quentin I. Churches
- School of Chemistry, Bio21 Institute Building, The University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia
| | - Craig A. Hutton
- School of Chemistry, Bio21 Institute Building, The University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia
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39
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Li J, Grillo AS, Burke MD. From synthesis to function via iterative assembly of N-methyliminodiacetic acid boronate building blocks. Acc Chem Res 2015; 48:2297-307. [PMID: 26200460 PMCID: PMC4688257 DOI: 10.1021/acs.accounts.5b00128] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The study and optimization of small molecule function is often impeded by the time-intensive and specialist-dependent process that is typically used to make such compounds. In contrast, general and automated platforms have been developed for making peptides, oligonucleotides, and increasingly oligosaccharides, where synthesis is simplified to iterative applications of the same reactions. Inspired by the way natural products are biosynthesized via the iterative assembly of a defined set of building blocks, we developed a platform for small molecule synthesis involving the iterative coupling of haloboronic acids protected as the corresponding N-methyliminodiacetic acid (MIDA) boronates. Here we summarize our efforts thus far to develop this platform into a generalized and automated approach for small molecule synthesis. We and others have employed this approach to access many polyene-based compounds, including the polyene motifs found in >75% of all polyene natural products. This platform further allowed us to derivatize amphotericin B, the powerful and resistance-evasive but also highly toxic last line of defense in treating systemic fungal infections, and thereby understand its mechanism of action. This synthesis-enabled mechanistic understanding has led us to develop less toxic derivatives currently under evaluation as improved antifungal agents. To access more Csp(3)-containing small molecules, we gained a stereocontrolled entry into chiral, non-racemic α-boryl aldehydes through the discovery of a chiral derivative of MIDA. These α-boryl aldehydes are versatile intermediates for the synthesis of many Csp(3) boronate building blocks that are otherwise difficult to access. In addition, we demonstrated the utility of these types of building blocks in accessing pharmaceutically relevant targets via an iterative Csp(3) cross-coupling cycle. We have further expanded the scope of the platform to include stereochemically complex macrocyclic and polycyclic molecules using a linear-to-cyclized strategy, in which Csp(3) boronate building blocks are iteratively assembled into linear precursors that are then cyclized into the cyclic frameworks found in many natural products and natural product-like structures. Enabled by the serendipitous discovery of a catch-and-release protocol for generally purifying MIDA boronate intermediates, the platform has been automated. The synthesis of 14 distinct classes of small molecules, including pharmaceuticals, materials components, and polycyclic natural products, has been achieved using this new synthesis machine. It is anticipated that the scope of small molecules accessible by this platform will continue to expand via further developments in building block synthesis, Csp(3) cross-coupling methodologies, and cyclization strategies. Achieving these goals will enable the more generalized synthesis of small molecules and thereby help shift the rate-limiting step in small molecule science from synthesis to function.
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Affiliation(s)
- Junqi Li
- Howard Hughes Medical Institute and Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Anthony S Grillo
- Howard Hughes Medical Institute and Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Martin D Burke
- Howard Hughes Medical Institute and Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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40
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Zhao L, Fang DC. A Theoretical Probe of Mechanistic Trichotomy in RhIII-Catalyzed Annulation with Alkyne MIDA Boronates: Roles of Salt, Solvent, and Coupling Partner. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500329] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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41
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Fyfe JWB, Valverde E, Seath CP, Kennedy AR, Redmond JM, Anderson NA, Watson AJB. Speciation Control During Suzuki-Miyaura Cross-Coupling of Haloaryl and Haloalkenyl MIDA Boronic Esters. Chemistry 2015; 21:8951-64. [DOI: 10.1002/chem.201500970] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Indexed: 12/20/2022]
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42
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Adachi S, Cognetta AB, Niphakis MJ, He Z, Zajdlik A, St Denis JD, Scully CCG, Cravatt BF, Yudin AK. Facile synthesis of borofragments and their evaluation in activity-based protein profiling. Chem Commun (Camb) 2015; 51:3608-11. [PMID: 25633248 PMCID: PMC4330092 DOI: 10.1039/c4cc09107h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The discovery of enzyme inhibitors relies on synthetic methods that enable rapid and modular construction of small molecules. Heterocyclic fragments designed to maximize enthalpic interactions with their protein targets represent a particularly desirable class of molecules. Here we describe a reagent that enables straightforward construction of "borofragments", in which a heterocycle is separated from the boron center by two or three rotatable bonds. The stability of these molecules depends on the MIDA group which likely acts as a slow-release element under biological conditions. Borofragments can be used to discover inhibitors of enzymes that use catalytic oxygen nucleophiles. We have employed this method to identify inhibitors of ABHD10 and the predicted carboxypeptidase CPVL. This technique should be applicable to other classes of targets.
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Affiliation(s)
- Shinya Adachi
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON M5S3H6, Canada.
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43
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Sollert C, Devaraj K, Orthaber A, Gates PJ, Pilarski LT. Ru-catalysed C-H arylation of indoles and pyrroles with boronic acids: scope and mechanistic studies. Chemistry 2015; 21:5380-6. [PMID: 25689052 PMCID: PMC4600241 DOI: 10.1002/chem.201405931] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Indexed: 12/28/2022]
Abstract
The Ru-catalysed C2–H arylation of indoles and pyrroles by using boronic acids under oxidative conditions is reported. This reaction can be applied to tryptophan derivatives and tolerates a wide range of functional groups on both coupling partners, including bromides and iodides, which can be further derivatised selectively. New indole-based ruthenacyclic complexes are described and investigated as possible intermediates in the reaction. Mechanistic studies suggest the on-cycle intermediates do not possess a para-cymene ligand and that the on-cycle metalation occurs through an electrophilic attack by the Ru centre.
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Affiliation(s)
- Carina Sollert
- Department of Chemistry-BMC, Uppsala University, Box 576, 75-123 Uppsala (Sweden), Fax: (+46) 18-471-38-18
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44
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Molloy JJ, Law RP, Fyfe JWB, Seath CP, Hirst DJ, Watson AJB. A modular synthesis of functionalised phenols enabled by controlled boron speciation. Org Biomol Chem 2015; 13:3093-102. [DOI: 10.1039/c5ob00078e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalised biaryl phenols can be rapidly accessed via one-pot Suzuki–Miyaura cross-coupling, chemoselective control of boron solution speciation, and oxidation.
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Affiliation(s)
- John J. Molloy
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Robert P. Law
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - James W. B. Fyfe
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Ciaran P. Seath
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | | | - Allan J. B. Watson
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
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45
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McAdam CA, McLaughlin MG, Cook MJ. An alkyne hydrosilylation–Hiyama coupling approach to highly functionalised 1,3-dienes. Org Chem Front 2015. [DOI: 10.1039/c5qo00002e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A high yielding and completely stereoselective hydrosilylation–Hiyama protocol has been established for the synthesis of highly functionalised E,E-dienes.
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Affiliation(s)
- Catherine A. McAdam
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
| | - Mark G. McLaughlin
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
| | - Matthew J. Cook
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
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46
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Hill AF, Stewart CD, Ward JS. Organometallic chemistry of ethynyl boronic acid MIDA ester, HCCB(O2CCH2)2NMe. Dalton Trans 2015; 44:5713-26. [DOI: 10.1039/c4dt03695f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions of HCCBMIDA (BMIDA = B(O2CCH2)2NMe) with a range of ruthenium complexes examples of σ-alkynyl, σ-alkenyl and vinylidene complexes bearing 4-coordinate boron substituents.
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Affiliation(s)
- Anthony F. Hill
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
| | - Craig D. Stewart
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
| | - Jas S. Ward
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
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47
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McLaughlin MG, McAdam CA, Cook MJ. MIDA–Vinylsilanes: Selective Cross-Couplings and Applications to the Synthesis of Functionalized Stilbenes. Org Lett 2014; 17:10-3. [DOI: 10.1021/ol503065a] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Mark G. McLaughlin
- School
of Chemistry and Chemical
Engineering, Queen’s University Belfast, Belfast BT9 5AG, Northern Ireland
| | - Catherine A. McAdam
- School
of Chemistry and Chemical
Engineering, Queen’s University Belfast, Belfast BT9 5AG, Northern Ireland
| | - Matthew J. Cook
- School
of Chemistry and Chemical
Engineering, Queen’s University Belfast, Belfast BT9 5AG, Northern Ireland
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48
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St Denis JD, Zajdlik A, Tan J, Trinchera P, Lee CF, He Z, Adachi S, Yudin AK. Boron-containing enamine and enamide linchpins in the synthesis of nitrogen heterocycles. J Am Chem Soc 2014; 136:17669-73. [PMID: 25422871 DOI: 10.1021/ja510963k] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The use of α-boryl enamine and enamide linchpins in the synthesis of nitrogen heterocycles has been demonstrated. Boryl enamines provide ready access to the corresponding α-halo aldehydes, which undergo regioselective annulation to form borylated thiazoles. A condensation/amidation sequence converts α-boryl aldehydes into stable α-boryl enamides without concomitant C → N migration. We also show that palladium-catalyzed cyclization of α-boryl enamides leads to synthetically versatile isoindolones. These molecules can be subsequently used to access polycyclic scaffolds.
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Affiliation(s)
- Jeffrey D St Denis
- Davenport Research Laboratories, Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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49
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Fyfe JWB, Seath CP, Watson AJB. Chemoselective boronic ester synthesis by controlled speciation. Angew Chem Int Ed Engl 2014; 53:12077-80. [PMID: 25267096 PMCID: PMC4501314 DOI: 10.1002/anie.201406714] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/02/2014] [Indexed: 11/08/2022]
Abstract
Control of boronic acid solution speciation is presented as a new strategy for the chemoselective synthesis of boronic esters. Manipulation of the solution equilibria within a cross-coupling milieu enables the formal homologation of aryl and alkenyl boronic acid pinacol esters. The generation of a new, reactive boronic ester in the presence of an active palladium catalyst also facilitates streamlined iterative catalytic C-C bond formation and provides a method for the controlled oligomerization of sp(2) -hybridized boronic esters.
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Affiliation(s)
- James W B Fyfe
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde295 Cathedral Street, Glasgow, G1 1XL (UK)
| | - Ciaran P Seath
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde295 Cathedral Street, Glasgow, G1 1XL (UK)
| | - Allan J B Watson
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde295 Cathedral Street, Glasgow, G1 1XL (UK)
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50
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Fyfe JWB, Seath CP, Watson AJB. Chemoselective Boronic Ester Synthesis by Controlled Speciation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406714] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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