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Yeo J, Tassone JP, Ellman JA. Synthesis of α-Quaternary Amides via Cp*Co(III)-Catalyzed Sequential C-H Bond Addition to 1,3-Dienes and Isocyanates. Org Lett 2024; 26:9769-9774. [PMID: 39481088 PMCID: PMC11578270 DOI: 10.1021/acs.orglett.4c03740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2024]
Abstract
The synthesis of sterically congested amides was accomplished via Cp*Co(III)-catalyzed sequential C-H bond addition to 1,3-dienes followed by aminocarbonylation with isocyanates, a coupling partner that had never been utilized in sequential C-H bond addition reactions. A variety of C-H bond reactants, internally substituted dienes, and aromatic isocyanates provided secondary amide products incorporating α-all-carbon quaternary centers. The conversion of the amide products to other useful compound classes was also demonstrated.
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Morrison KM, Roberts NJ, Dudra SL, Tassone JP, Ferguson MJ, Johnson ER, Stradiotto M. Nickel-Catalyzed O-Arylation of Primary or Secondary Aliphatic Alcohols with (Hetero)aryl Chlorides: A Comparison of Ni(I) and Ni(II) Precatalysts. J Org Chem 2024; 89:16126-16133. [PMID: 38091599 DOI: 10.1021/acs.joc.3c01584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2024]
Abstract
A comparative experimental and computational study examining the interplay of the ancillary ligand structure and Ni oxidation state in the Ni-catalyzed C(sp2)-O cross-coupling of (hetero)aryl chlorides and primary or secondary aliphatic alcohols is presented, focusing on PAd-DalPhos (L1)-, CyPAd-DalPhos (L2)-, PAd2-DalPhos (L3)-, and DPPF (L4)-ligated [(L)NiCl]n (n = 1 or 2) and (L)Ni(o-tol)Cl precatalysts. Both L1 and L2 were found to outperform the other ligands examined, with the latter proving to be superior overall. While Ni(II) precatalysts generally outperformed Ni(I) species, in some instances the catalytic abilities of Ni(I) precatalysts were competitive with those of Ni(II). Density-functional theory calculations indicate the favorability of a Ni(0)/Ni(II) catalytic cycle featuring turnover-limiting C-O bond reductive elimination over a Ni(I)/Ni(III) cycle involving turnover-limiting C-Cl oxidative addition.
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Tassone JP, Yeo J, Ellman JA. Three-component carboformylation: α-quaternary aldehyde synthesis via Co(iii)-catalysed sequential C-H bond addition to dienes and acetic formic anhydride. Chem Sci 2022; 13:14320-14326. [PMID: 36545136 PMCID: PMC9749387 DOI: 10.1039/d2sc05599f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 11/20/2022] [Indexed: 11/23/2022] Open
Abstract
All carbon α-quaternary aldehydes are prepared via Co(iii)-catalysed sequential C-H bond addition to dienes and acetic formic anhydride, representing a rare example of intermolecular carboformylation. A wide range of internally substituted dienes containing diverse functionality can be employed in this reaction, affording complex α-quaternary aldehydes that would not be accessible via hydroformylation approaches. Mechanistic investigations, including control reactions and deuterium labeling studies, establish a catalytic cycle that accounts for formyl group introduction with an uncommon 1,3-addition selectivity to the conjugated diene. Investigations into the role of the uniquely effective additive Proton Sponge® were also conducted, leading to the observation of a putative, intermediate Co(i) tetramethylfulvene complex at low temperatures via NMR spectroscopy. The synthetic utility of the aldehyde products is demonstrated by various transformations, including proline-catalysed asymmetric aldol addition, reductive amination, and the asymmetric synthesis of amines using tert-butanesulfinamide technology.
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Xu C, Tassone JP, Mercado BQ, Ellman JA. Stereoselective Synthesis of Allenyl Alcohols by Cobalt(III)-Catalyzed Sequential C-H Bond Addition to 1,3-Enynes and Aldehydes. Angew Chem Int Ed Engl 2022; 61:e202202364. [PMID: 35420724 PMCID: PMC9189073 DOI: 10.1002/anie.202202364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Indexed: 12/11/2022]
Abstract
An efficient and stereoselective CoIII -catalyzed sequential C-H bond addition to 1,3-enynes and aldehydes is disclosed. This transformation represents the first example of sequential C-H bond additions to 1,3-enynes and a second coupling partner and provides the first example of preparing allenes by C-H bond addition to 1,3-enynes. A wide range of aldehydes, C-H bond substrates and 1,3-enynes with large substituents on the alkynes are effective substrates. The allenyl alcohol products can be further converted to dihydrofurans with high stereoselectivity either in situ or under Ag-mediated cyclization conditions. The allenyl silyl group can also be transferred to the adjacent alcohol by a Brook rearrangement. Moreover, a mechanism for the transformation is proposed supported by X-ray structural characterization of a cobaltacycle intermediate.
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Tassone JP, Lundrigan T, Ashton TD, Stradiotto M. Nickel-Catalyzed C-N Cross-Coupling of 4-Chloro-1,8-naphthalimides and Bulky, Primary Alkylamines at Room Temperature. J Org Chem 2022; 87:6492-6498. [PMID: 35442025 DOI: 10.1021/acs.joc.2c00417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
4-Amino-1,8-naphthalimides, potentially useful fluorescent probes in biological applications, are prepared via Ni(cod)2/IPr-catalyzed cross-couplings between 4-chloro-1,8-naphthalimide electrophiles and α,α,α-trisubstituted, primary alkylamines at room temperature. This method represents the first synthesis of 4-amino-1,8-naphthalimides using Ni-catalyzed C-N cross-coupling and provides the first examples of 4-amino-1,8-naphthalimides incorporating such bulky primary alkylamines, thereby highlighting the utility of Ni-catalyzed processes in synthesizing naphthalimide scaffolds that were inaccessible using established methods (SNAr; Pd or Cu catalysis).
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Xu C, Tassone JP, Mercado BQ, Ellman JA. Stereoselective Synthesis of Allenyl Alcohols by Cobalt(III)‐Catalyzed Sequential C−H Bond Addition to 1,3‐Enynes and Aldehydes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bodé NE, Tassone JP, Ferguson MJ, Stradiotto M. Structural and Reactivity Comparisons of JosiPhos CyPF-Cy and a Simplified Variant (“CyPBn-Cy”) in Nickel-Catalyzed C(sp 2)-N Cross-Couplings. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Stradiotto M, Lundrigan T, Tassone JP. Nickel-Catalyzed N-Arylation of Amides with (Hetero)aryl Electrophiles by Using a DBU/NaTFA Dual-Base System. Synlett 2020. [DOI: 10.1055/a-1337-6459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractThe first nickel-catalyzed N-arylation of amides with (hetero)aryl (pseudo)halides employing an organic amine base is described. By using a bis(cyclooctadienyl)nickel/8-[2-(dicyclohexylphosphinyl)phenyl]-1,3,5,7-tetramethyl-2,4,6-trioxa-8-phosphaadamantane catalyst mixture in combination with DBU/NaTFA as a dual-base system, a diversity of (hetero)aryl chloride, bromide, tosylate, and mesylate electrophiles were successfully cross-coupled with structurally diverse primary amides, as well as a selection of secondary amide, lactam, and oxazolidone nucleophiles.
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Tassone JP, England EV, MacQueen PM, Ferguson MJ, Stradiotto M. PhPAd‐DalPhos: Ligand‐Enabled, Nickel‐Catalyzed Cross‐Coupling of (Hetero)aryl Electrophiles with Bulky Primary Alkylamines. Angew Chem Int Ed Engl 2019; 58:2485-2489. [DOI: 10.1002/anie.201812862] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/02/2019] [Indexed: 01/11/2023]
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Tassone JP, England EV, MacQueen PM, Ferguson MJ, Stradiotto M. PhPAd-DalPhos: Ligand-Enabled, Nickel-Catalyzed Cross-Coupling of (Hetero)aryl Electrophiles with Bulky Primary Alkylamines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812862] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Lavoie CM, Tassone JP, Ferguson MJ, Zhou Y, Johnson ER, Stradiotto M. Probing the Influence of PAd-DalPhos Ancillary Ligand Structure on Nickel-Catalyzed Ammonia Cross-Coupling. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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MacQueen PM, Tassone JP, Diaz C, Stradiotto M. Exploiting Ancillary Ligation To Enable Nickel-Catalyzed C-O Cross-Couplings of Aryl Electrophiles with Aliphatic Alcohols. J Am Chem Soc 2018; 140:5023-5027. [PMID: 29601188 DOI: 10.1021/jacs.8b01800] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The use of (L)Ni( o-tolyl)Cl precatalysts (L = PAd-DalPhos or CyPAd-DalPhos) enables the C( sp2)-O cross-coupling of primary, secondary, or tertiary aliphatic alcohols with (hetero)aryl electrophiles, including unprecedented examples of such nickel-catalyzed transformations employing (hetero)aryl chlorides, sulfonates, and pivalates. In addition to offering a competitive alternative to palladium catalysis, this work establishes the feasibility of utilizing ancillary ligation as a complementary means of promoting challenging nickel-catalyzed C( sp2)-O cross-couplings, without recourse to precious-metal photoredox catalytic methods.
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Tassone JP, MacQueen PM, Lavoie CM, Ferguson MJ, McDonald R, Stradiotto M. Nickel-Catalyzed N-Arylation of Cyclopropylamine and Related Ammonium Salts with (Hetero)aryl (Pseudo)halides at Room Temperature. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02014] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Tassone JP, Spivak GJ. [P,N]-phosphinobenzimidazole ligands in palladium-catalyzed C-N cross-coupling reactions: The effect of the N -substituent of the benzimidazole scaffold on catalyst performance. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.04.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Tassone JP, Mawhinney RC, Spivak GJ. An examination of the effects of borate group proximity on phosphine donor power in anionic (phosphino)tetraphenylborate ligands. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.10.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Walker JM, Tassone JP, Jenkins HA, Spivak GJ. The synthesis of an anionic, tetraphenylborate-functionalized, [P,N]-hybrid phosphinobenzimidazole ligand and its hemilabile behaviour in ruthenium zwitterion chemistry. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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