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Borowski JE, Newman-Stonebraker SH, Doyle AG. Comparison of Monophosphine and Bisphosphine Precatalysts for Ni-Catalyzed Suzuki-Miyaura Cross-Coupling: Understanding the Role of the Ligation State in Catalysis. ACS Catal 2023; 13:7966-7977. [PMID: 38037565 PMCID: PMC10688240 DOI: 10.1021/acscatal.3c01331] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Practical advances in Ni-catalyzed Suzuki-Miyaura cross-coupling (SMC) have been limited by a lack of mechanistic understanding of phosphine ligand effects. While bisphosphines are commonly used in these methodologies, we have observed instances where monophosphines can provide comparable or higher levels of reactivity. Seeking to understand the role of ligation state in catalysis, we performed a head-to-head comparison study of C(sp2)-C(sp2) Ni SMCs catalyzed by mono and bisphosphine precatalysts using six distinct substrate pairings. Significant variation in optimal precatalyst was observed, with the monophosphine precatalyst tending to outperform the bisphosphines with electronically deactivated and sterically hindered substrates. Mechanistic experiments revealed a role for monoligated (P1Ni) species in accelerating the fundamental organometallic steps of the catalytic cycle, while highlighting the need for bisligated (P2Ni) species to avoid off-cycle reactivity and catalyst poisoning by heterocyclic motifs. These findings provide guidelines for ligand selection against challenging substrates and future ligand design tailored to the mechanistic demands of Ni-catalyzed SMCs.
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Affiliation(s)
| | - Samuel H. Newman-Stonebraker
- Department of Chemistry, Princeton University, Princeton, NJ 08544
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095
| | - Abigail G. Doyle
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095
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Murray JI, Zhang L, Simon A, Silva Elipe MV, Wei CS, Caille S, Parsons AT. Kinetic and Mechanistic Investigations to Enable a Key Suzuki Coupling for Sotorasib Manufacture─What a Difference a Base Makes. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- James I. Murray
- Pivotal and Commercial Synthetics, Drug Substance Technologies, Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Liang Zhang
- Pivotal and Commercial Synthetics, Drug Substance Technologies, Process Development,Amgen Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Adam Simon
- Center for Research Acceleration by Digitalization, Research & Development, Drug Substance Technologies, Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Maria V. Silva Elipe
- Pivotal Attribute Sciences, Drug Substance Technologies, Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Carolyn S. Wei
- Pivotal and Commercial Synthetics, Drug Substance Technologies, Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Seb Caille
- Pivotal and Commercial Synthetics, Drug Substance Technologies, Process Development, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Andrew T. Parsons
- Pivotal and Commercial Synthetics, Drug Substance Technologies, Process Development,Amgen Inc., 360 Binney Street, Cambridge, Massachusetts 02142, United States
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Bumraiwha HF, Sterenberg BT. Synthesis of 1,1′‐bisphosphinoferrocenes using electrophilic addition reactions of tungsten coordinated phosphenium ions and phosphine triflates. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Copper-Catalyzed Homocoupling of Boronic Acids: A Focus on B-to-Cu and Cu-to-Cu Transmetalations. Molecules 2022; 27:molecules27217517. [DOI: 10.3390/molecules27217517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
Abstract
Controlling and understanding the Cu-catalyzed homocoupling reaction is crucial to prompt the development of efficient Cu-catalyzed cross-coupling reactions. The presence of a coordinating base (hydroxide and methoxide) enables the B-to-Cu(II) transmetalation from aryl boronic acid to CuIICl2 in methanol, through the formation of mixed Cu-(μ-OH)-B intermediates. A second B-to-Cu transmetalation to form bis-aryl Cu(II) complexes is disfavored. Instead, organocopper(II) dimers undergo a coupled transmetalation-electron transfer (TET) allowing the formation of bis-organocopper(III) complexes readily promoting reductive elimination. Based on this mechanism some guidelines are suggested to control the undesired formation of homocoupling product in Cu-catalyzed cross-coupling reactions.
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Hoff LV, Chesnokov GA, Linden A, Gademann K. Mechanistic Studies and Data Science-Guided Exploration of Bromotetrazine Cross-Coupling. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lukas V. Hoff
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Gleb A. Chesnokov
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Anthony Linden
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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Stepnicka P, Horký F. The coordination and catalytic chemistry of phosphanylferrocene chalcogenides. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200276] [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)
- Petr Stepnicka
- Charles University in Prague Department of Inorganic Chemistry, Faculty of Science Hlavova 2030 12840 Prague CZECH REPUBLIC
| | - Filip Horký
- Charles University: Univerzita Karlova Department of Inorganic Chemistry CZECH REPUBLIC
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Scott NW, Ford MJ, Jeddi N, Eyles A, Simon L, Whitwood AC, Tanner T, Willans CE, Fairlamb IJS. A Dichotomy in Cross-Coupling Site Selectivity in a Dihalogenated Heteroarene: Influence of Mononuclear Pd, Pd Clusters, and Pd Nanoparticles-the Case for Exploiting Pd Catalyst Speciation. J Am Chem Soc 2021; 143:9682-9693. [PMID: 34152135 PMCID: PMC8297865 DOI: 10.1021/jacs.1c05294] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Indexed: 12/23/2022]
Abstract
Site-selective dihalogenated heteroarene cross-coupling with organometallic reagents usually occurs at the halogen proximal to the heteroatom, enabled by intrinsic relative electrophilicity, particularly in strongly polarized systems. An archetypical example is the Suzuki-Miyaura cross-coupling (SMCC) of 2,4-dibromopyridine with organoboron species, which typically exhibit C2-arylation site-selectivity using mononuclear Pd (pre)catalysts. Given that Pd speciation, particularly aggregation, is known to lead to the formation of catalytically competent multinuclear Pdn species, the influence of these species on cross-coupling site-selectivity remains largely unknown. Herein, we disclose that multinuclear Pd species, in the form of Pd3-type clusters and nanoparticles, switch arylation site-selectivity from C2 to C4, in 2,4-dibromopyridine cross-couplings with both organoboronic acids (SMCC reactions) and Grignard reagents (Kumada-type reactions). The Pd/ligand ratio and the presence of suitable stabilizing salts were found to be critically important in switching the site-selectivity. More generally, this study provides experimental evidence that aggregated Pd catalyst species not only are catalytically competent but also alter reaction outcomes through changes in product selectivity.
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Affiliation(s)
- Neil W.
J. Scott
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
| | - Mark J. Ford
- Bayer
AG, Alfred-Nobel-Strasse
50, 40789 Monheim, Germany
| | - Neda Jeddi
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
| | - Anthony Eyles
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
| | - Lauriane Simon
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
| | - Adrian C. Whitwood
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
| | - Theo Tanner
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
| | - Charlotte E. Willans
- School
of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United
Kingdom
| | - Ian J. S. Fairlamb
- Department
of Chemistry, University of York, Heslington, York, North
Yorkshire YO10 5DD, United Kingdom
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