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Liao J, Basch CH, Hoerrner ME, Talley MR, Boscoe BP, Tucker JW, Garnsey MR, Watson MP. Deaminative Reductive Cross-Electrophile Couplings of Alkylpyridinium Salts and Aryl Bromides. Org Lett 2019; 21:2941-2946. [PMID: 30917282 DOI: 10.1021/acs.orglett.9b01014] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A nickel-catalyzed reductive cross-coupling of alkylpyridinium salts and aryl bromides has been developed using Mn as the reductant. Both primary and secondary alkylpyridinium salts can be used, and high functional group and heterocycle tolerance is observed, including for protic groups. Mechanistic studies indicate the formation of an alkyl radical, and controlling its fate was key to the success of this reaction.
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Affiliation(s)
- Jennie Liao
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Corey H Basch
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Megan E Hoerrner
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Michael R Talley
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Brian P Boscoe
- Medicine Design, Pfizer Worldwide Research and Development , Groton , Connecticut 06340 , United States
| | - Joseph W Tucker
- Medicine Design, Pfizer Worldwide Research and Development , Groton , Connecticut 06340 , United States
| | - Michelle R Garnsey
- Medicine Design, Pfizer Worldwide Research and Development , Groton , Connecticut 06340 , United States
| | - Mary P Watson
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
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Plunkett S, Basch CH, Santana SO, Watson MP. Harnessing Alkylpyridinium Salts as Electrophiles in Deaminative Alkyl-Alkyl Cross-Couplings. J Am Chem Soc 2019; 141:2257-2262. [PMID: 30682254 PMCID: PMC6434706 DOI: 10.1021/jacs.9b00111] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A Negishi cross-coupling of alkylpyridinium salts and alkylzinc halides has been developed. This is the first example of alkyl-alkyl bond formation via cross-coupling of an alkyl amine derivative with an unactivated alkyl group, and allows both primary and secondary alkylpyridinium salts to react with primary alkylzinc halides with high functional group tolerance. When combined with formation of the pyridinium salts from primary amines, this method enables the noncanonical transformation of NH2 groups into a wide range of alkyl substituents with broad functional group tolerance.
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Affiliation(s)
- Shane Plunkett
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Corey H. Basch
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Samantha O. Santana
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Mary P. Watson
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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53
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Novartis Chemistry Lectureship 2018–2019: E. A. Anderson, M. B. Francis, R. Martín, M. Sodeoka. Angew Chem Int Ed Engl 2019; 58:1549. [DOI: 10.1002/anie.201813736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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54
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Novartis Chemistry Lectureship 2018–2019: E. A. Anderson, M. B. Francis, R. Martín, M. Sodeoka. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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55
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Guo L, Song F, Zhu S, Li H, Chu L. syn-Selective alkylarylation of terminal alkynes via the combination of photoredox and nickel catalysis. Nat Commun 2018; 9:4543. [PMID: 30382103 PMCID: PMC6208420 DOI: 10.1038/s41467-018-06904-9] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 09/25/2018] [Indexed: 11/25/2022] Open
Abstract
Substituted alkenes are pivotal structural motifs found in pharmaceuticals and agrochemicals. Although numerous methods have been developed to construct substituted alkenes, a generally efficient, mild, catalytic platform for the conversion of alkynes to this highly functionalized scaffold via successive C–C bond forming steps remains in high demand. Here we describe an intermolecular, regio- and syn-stereoselective alkylarylation of terminal alkynes with tertiary alkyl oxalates via photoredox-Ni dual catalysis. This catalytic protocol, synergistically combining Ir/Ni-catalyzed alkyne difunctionalization with photoinduced alkene isomerization, affords trisubstituted alkenes with excellent efficiency and syn-stereoselectivity. The mild conditions tolerate many functional groups, allowing for a broad scope with respect to terminal alkynes, aryl bromides, and alkyl oxalates. Converting alkynes into alkenes with high stereoselectivity via two consecutive C-C bond forming steps is a desirable process, yet very challenging. Here, the authors describe a dual photoredox-nickel catalytic system for the regio- and syn-selective alkylarylation of terminal alkynes with alkyl oxalates and aryl bromides.
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Affiliation(s)
- Lei Guo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Center for Advanced Low-Dimension Materials, Donghua University, Shanghai, 201620, China
| | - Fan Song
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Center for Advanced Low-Dimension Materials, Donghua University, Shanghai, 201620, China
| | - Shengqing Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Center for Advanced Low-Dimension Materials, Donghua University, Shanghai, 201620, China
| | - Huan Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Center for Advanced Low-Dimension Materials, Donghua University, Shanghai, 201620, China
| | - Lingling Chu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Center for Advanced Low-Dimension Materials, Donghua University, Shanghai, 201620, China.
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56
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Sun SZ, Börjesson M, Martin-Montero R, Martin R. Site-Selective Ni-Catalyzed Reductive Coupling of α-Haloboranes with Unactivated Olefins. J Am Chem Soc 2018; 140:12765-12769. [PMID: 30244574 DOI: 10.1021/jacs.8b09425] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A mild, chemo- and site-selective catalytic protocol that allows for incorporating an alkylboron fragment into unactivated olefins is described. The use of internal olefins enables C-C bond-formation at remote sp3 C-H sites, constituting a complementary and conceptually different approach to existing borylation techniques that are currently available at sp3 centers.
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Affiliation(s)
- Shang-Zheng Sun
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology, Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Marino Börjesson
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology, Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Raul Martin-Montero
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology, Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology, Av. Països Catalans 16 , 43007 Tarragona , Spain.,ICREA , Passeig Lluís Companys, 23 , 08010 Barcelona , Spain
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Boekhoven J, Didier D. Vereinigung von Kunst und Wissenschaft: Die 53. Bürgenstock-Konferenz. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Job Boekhoven
- Fakultät für Chemie und Institute for Advanced Study; Technische Universität München; Lichtenbergstraße 4 85748 Garching Deutschland
| | - Dorian Didier
- Fakultät für Chemie und Pharmazie; Ludwig-Maximilians-Universität; Butenandtstraße 5-13 81377 München Deutschland
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Boekhoven J, Didier D. Merging Art and Science-The 53rd Bürgenstock Conference. Angew Chem Int Ed Engl 2018; 57:10011-10014. [PMID: 30003659 DOI: 10.1002/anie.201806142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
For the 53rd time, the Bürgenstock Conference gathered some of the most gifted scientists and rising stars in organic, physical, and bioorganic chemistry. Orchestrated by Ilan Marek (President) and his successor, Véronique Gouverneur, the synergy between art and science took place in Brunnen, Switzerland, with a beatiful view over Lake Lucerne.
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Affiliation(s)
- Job Boekhoven
- Department of Chemistry and Institute for Advanced Study, Technische Universität München, Lichtenbergstraße 4, 85748, Garching, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377, Munich, Germany
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