1
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Lancaster H, Goodall JC, Douglas SP, Ashfield LJ, Duckett SB, Perutz RN, Weller AS. Platinum(II) Phenylpyridyl Schiff Base Complexes as Latent, Photoactivated, Alkene Hydrosilylation Catalysts. ACS Catal 2024; 14:7492-7505. [PMID: 38779183 PMCID: PMC11106775 DOI: 10.1021/acscatal.4c01353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 05/25/2024]
Abstract
Photoactivated catalysts for the hydrosilylation of alkenes with silanes offer temporal control in manufacturing processes that require silicone curing. We report the development of a range of air-stable Pt(II) (salicylaldimine)(phenylpyridyl), [Pt(sal)(ppy)], complexes as photoinitiated hydrosilylation catalysts. Some of these catalysts show appreciable latency in thermal catalysis and can also be rapidly (10 s) activated by a LED UV-light source (365 nm), to give systems that selectively couple trimethylvinylsilane and hexamethylsiloxymethylsilane to give the linear hydrosilylation product. Although an undetectable (by NMR spectroscopy) amount of precatalyst is converted to the active form under UV-irradiation in the timescale required to initiate hydrosilylation, clean and reliable kinetics can be measured for these systems that allow for a detailed mechanism to be developed for Pt(sal)(ppy)-based photoactivated hydrosilylation. The suggested mechanism is shown to have close parallels with, but also subtle differences from, those previously proposed for thermally-activated Karstedt-type Pt(0) systems.
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Affiliation(s)
- Helena
G. Lancaster
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Joe C. Goodall
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Samuel P. Douglas
- Johnson
Matthey Technology Center, Blounts Court Road, Sonning Common, Reading RG4 9NH, U.K.
| | - Laura J. Ashfield
- Johnson
Matthey Technology Center, Blounts Court Road, Sonning Common, Reading RG4 9NH, U.K.
| | - Simon B. Duckett
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Robin N. Perutz
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
| | - Andrew S. Weller
- Department
of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
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2
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Andreychuk NR, Vidjayacoumar B, Price JS, Kervazo S, Peeples CA, Emslie DJH, Vallet V, Gomes ASP, Réal F, Schreckenbach G, Ayers PW, Vargas-Baca I, Jenkins HA, Britten JF. Uranium(iv) alkyl cations: synthesis, structures, comparison with thorium(iv) analogues, and the influence of arene-coordination on thermal stability and ethylene polymerization activity. Chem Sci 2022; 13:13748-13763. [PMID: 36544741 PMCID: PMC9710223 DOI: 10.1039/d2sc04302e] [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: 08/02/2022] [Accepted: 10/31/2022] [Indexed: 11/12/2022] Open
Abstract
Reaction of [(XA2)U(CH2SiMe3)2] (1; XA2 = 4,5-bis(2,6-diisopropylanilido)-2,7-di-tert-butyl-9,9-dimethylxanthene) with 1 equivalent of [Ph3C][B(C6F5)4] in arene solvents afforded the arene-coordinated uranium alkyl cations, [(XA2)U(CH2SiMe3)(η n -arene)][B(C6F5)4] {arene = benzene (2), toluene (3), bromobenzene (4) and fluorobenzene (5)}. Compounds 2, 3, and 5 were crystallographically characterized, and in all cases the arene is π-coordinated. Solution NMR studies of 2-5 suggest that the binding preferences of the [(XA2)U(CH2SiMe3)]+ cation follow the order: toluene ≈ benzene > bromobenzene > fluorobenzene. Compounds 2-4 generated in C6H5R (R = H, Me or Br, respectively) showed no polymerization activity under 1 atm of ethylene. By contrast, 5 and 5-Th (the thorium analogue of 5) in fluorobenzene at 20 and 70 °C achieved ethylene polymerization activities between 16 800 and 139 200 g mol-1 h-1 atm-1, highlighting the extent to which common arene solvents such as toluene can suppress ethylene polymerization activity in sterically open f-element complexes. However, activation of [(XA2)An(CH2SiMe3)2] {M = U (1) or Th (1-Th)} with [Ph3C][B(C6F5)4] in n-alkane solvents did not afford an active polymerization catalyst due to catalyst decomposition, illustrating the critical role of PhX (X = H, Me, Br or F) coordination for alkyl cation stabilization. Gas phase DFT calculations, including fragment interaction calculations with energy decomposition and ETS-NOCV analysis, were carried out on the cationic portion of 2'-Th, 2', 3' and 5' (analogues of 2-Th, 2, 3 and 5 with hydrogen atoms in place of ligand backbone methyl and tert-butyl groups), providing insight into the nature of actinide-arene bonding, which decreases in strength in the order 2'-Th > 2' ≈ 3' > 5'.
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Affiliation(s)
- Nicholas R. Andreychuk
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
| | | | - Jeffrey S. Price
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
| | - Sophie Kervazo
- Université Lille, UMR 8523 – Physique des Lasers Atoms et MoleculesF-59000 LilleFrance
| | - Craig A. Peeples
- Department of Chemistry, University of ManitobaWinnipegR3T 2N2ManitobaCanada
| | - David J. H. Emslie
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
| | - Valérie Vallet
- Université Lille, UMR 8523 – Physique des Lasers Atoms et MoleculesF-59000 LilleFrance
| | - André S. P. Gomes
- Université Lille, UMR 8523 – Physique des Lasers Atoms et MoleculesF-59000 LilleFrance
| | - Florent Réal
- Université Lille, UMR 8523 – Physique des Lasers Atoms et MoleculesF-59000 LilleFrance
| | - Georg Schreckenbach
- Department of Chemistry, University of ManitobaWinnipegR3T 2N2ManitobaCanada
| | - Paul W. Ayers
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
| | - Ignacio Vargas-Baca
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
| | - Hilary A. Jenkins
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
| | - James F. Britten
- Department of Chemistry, McMaster University1280 Main St. WestHamiltonL8S 4M1OntarioCanada
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3
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Mandal D, Roychowdhury S, Biswas JP, Maiti S, Maiti D. Transition-metal-catalyzed C-H bond alkylation using olefins: recent advances and mechanistic aspects. Chem Soc Rev 2022; 51:7358-7426. [PMID: 35912472 DOI: 10.1039/d1cs00923k] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal catalysis has contributed immensely to C-C bond formation reactions over the last few decades, and alkylation is no exception. The superiority of such methodologies over traditional alkylation is evident from minimal reaction steps, shorter reaction times, and atom economy while also allowing control over regio- and stereo-selectivity. In particular, hydrocarbonation of alkenes has grabbed increased attention due its fundamental ability to effectively and selectively synthesise a wide range of industrially and pharmaceutically relevant moieties. This review attempts to provide a scientific viewpoint and a systematic analysis of the recent developments in transition-metal-catalyzed alkylation of various C-H bonds using simple and activated olefins. The key features and mechanistic studies involved in these transformations are described briefly.
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Affiliation(s)
- Debasish Mandal
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, India
| | - Sumali Roychowdhury
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Jyoti Prasad Biswas
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Siddhartha Maiti
- School of Bioengineering, Vellore Institute of Technology, Bhopal University, Bhopal-Indore Highway, Kothrikalan, Sehore, Madhya Pradesh-466114, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India. .,Department of Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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4
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Zur J, Schmidt M, Feichtner K, Duari P, Löffler J, Scherpf T, Gessner VH. From Stable PH-Ylides to α-Carbanionic Phosphines as Ligands for Zwitterionic Catalysts. Angew Chem Int Ed Engl 2022; 61:e202203950. [PMID: 35644923 PMCID: PMC9401067 DOI: 10.1002/anie.202203950] [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: 03/16/2022] [Indexed: 11/08/2022]
Abstract
Although ylides are commonly used reagents in organic synthesis, the parent methylphosphine MePH2 only exists in its phosphine form in the condensed phase. Its ylide tautomer H3 P+ -CH2 - is considerably higher in energy. Here, we report on the formation of bis(sulfonyl)methyl-substituted phosphines of the type (RO2 S)2 C(H)-PR2, which form stable PH ylides under ambient conditions, amongst the first examples of an acyclic phosphine which only exists in its PH ylide form. Depending on the exact substitution pattern the phosphines form an equilibrium between the PH ylide and the phosphine form or exist as one of both extremes. These phosphines were found to be ideal starting systems for the facile formation of α-carbanionic phosphines. The carbanion-functionalization leads to a switch from electron-poor to highly electron-rich phosphines with strong donor abilities and high basicities. Thus, the phosphines readily react with different electrophiles exclusively at the phosphorus atom and not at the carbanionic center. Furthermore, the anionic nature of the phosphines allows the formation of zwitterionic complexes as demonstrated by the isolation of a gold(I) complex with a cationic metal center. The cationic gold center allows for catalytic activity in the hydroamination of alkyne without requiring a further activation step.
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Affiliation(s)
- Jana‐Alina Zur
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Michelle Schmidt
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Kai‐Stephan Feichtner
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Prakash Duari
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Julian Löffler
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Thorsten Scherpf
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Viktoria H. Gessner
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
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5
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Zur J, Schmidt M, Feichtner K, Duari P, Löffler J, Scherpf T, Gessner VH. From Stable PH‐Ylides to α‐Carbanionic Phosphines as Ligands for Zwitterionic Catalysts. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jana‐Alina Zur
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Michelle Schmidt
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Kai‐Stephan Feichtner
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Prakash Duari
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Julian Löffler
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Thorsten Scherpf
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Viktoria H. Gessner
- Chair of Inorganic Chemistry II Faculty of Chemistry and Biochemistry Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
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6
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Flecken F, Grell T, Hanf S. Transition metal complexes of the PPO/POP ligand: variable coordination chemistry and photo-luminescence properties. Dalton Trans 2022; 51:8975-8985. [PMID: 35582983 DOI: 10.1039/d2dt01091g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the current work the tautomeric equilibrium between tetraphenyldiphosphoxane (Ph2P-O-PPh2, POP) and tetraphenyldiphosphine monoxide (Ph2P-P(O)Ph2, PPO) in the absence and presence of transition metal precursors is investigated. Whereas with hard transition metal ions, such as Fe(II) and Y(III), PPO-type complexes, such as [FeCl2(PPO)2] (1) and [YCl3(THF)2(PPO)] (2), are formed, softer transition metals ions tend to form so-called coordination stabilised tautomers of the POP ligand form, such as [Cu2(MeCN)3(μ2-POP)2](PF6)2 (3), [Au2Cl2(μ2-POP)] (4), and [Au2(μ2-POP)2](OTf)2 (5). The photo-optical properties of the PPO- and POP-type transition metal complexes are investigated experimentally using photo-luminescence spectroscopy, whereby the presence of metallophillic interactions was found to play a crucial role. The dinuclear copper complex [Cu2(MeCN)3(μ2-POP)2](PF6)2 (3) shows a very interesting thermochromic behavior and intense photo-luminescence with remarkable phosphoresence lifetimes at 77 K, which can probably be attributed to short intramolecular Cu-Cu distances.
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Affiliation(s)
- Franziska Flecken
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany.
| | - Toni Grell
- Dipartimento di Chimica, Università degli Studi di Milano, Via Camillo Golgi 19, 20131 Milano, Italy
| | - Schirin Hanf
- Institute for Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131 Karlsruhe, Germany.
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7
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Xu L, Hou Z, Ma X, Ma Y, Wang J, Zhang X, Wang P, Li M. Synthesis of C4‐Acyl‐tetrofuranosides and C5‐Acyl‐pentopyranosides Enabled by the Liebeskind–Srogl Cross‐Coupling Reaction. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Linhua Xu
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Zijiao Hou
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Xian Ma
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Yixuan Ma
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Jianjun Wang
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Xinxin Zhang
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Peng Wang
- Ocean University of China School of Medicine and Pharmacy Qingdao CHINA
| | - Ming Li
- Ocean University of China School of Pharmacy and Medicine 5 Yushan Road 266003 Qingdao CHINA
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8
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Wu Q, Dong Z, Xu J, Yang Z. Sulfur-controlled and rhodium-catalyzed formal (3 + 3) transannulation of thioacyl carbenes with alk-2-enals and mechanistic insights. Org Biomol Chem 2021; 19:3173-3180. [PMID: 33885571 DOI: 10.1039/d1ob00116g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A rhodium-catalyzed denitrogenative formal (3 + 3) transannulation of 1,2,3-thiadiazoles with alk-2-enals is achieved, producing 2,3-dihydrothiopyran-4-ones in moderate to excellent yields. An inverse KIE of 0.49 is obtained, suggesting the reversibility of the oxidative addition of thioacyl Rh(i) carbenes to alk-2-enals. The late-stage structural modifications of steroid compounds are realized. Moreover, our studies show that thioacyl carbenes have different reactivities to those of α-oxo and α-imino carbenes, and highlight the importance of heteroatoms in deciding the reactivities of heterovinyl carbenes.
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Affiliation(s)
- Qiuyue Wu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
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9
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Friedrich A, Eyselein J, Langer J, Harder S. Comparison of Magnesium and Zinc in Cationic π-Arene and Halobenzene Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00786] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexander Friedrich
- Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Jonathan Eyselein
- Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Jens Langer
- Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
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10
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Liu Y, Zhang K, Tian R, Duan Z, Mathey F. 1,1-Addition of α-C 2-Bridged Biphospholes with Alkynes. Org Lett 2020; 22:6972-6976. [PMID: 32846086 DOI: 10.1021/acs.orglett.0c02521] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An unusual chemoselective 1,1-addition of α-C2-bridged biphospholes to terminal alkynes is reported. The developed protocol provides simple access to the unknown 1,3-diphosphepines, which has potential applications in the coordination and catalyst chemistry. Their Pd and Mo complexes were studied by single-crystal X-ray diffraction analysis. This method features excellent chemoselectivity, high step and atom economy, mild reaction conditions, and wide substrate scope.
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Affiliation(s)
- Yanjie Liu
- College of Chemistry, Green Catalysis Center, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Keke Zhang
- College of Chemistry, Green Catalysis Center, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Rongqiang Tian
- College of Chemistry, Green Catalysis Center, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Zheng Duan
- College of Chemistry, Green Catalysis Center, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - François Mathey
- College of Chemistry, Green Catalysis Center, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou 450001, People's Republic of China
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11
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Yang PF, Shu W. Direct Synthesis of Mono-α-arylated Ketones from Alcohols and Olefins via Ni-Catalyzed Oxidative Cross-Coupling. Org Lett 2020; 22:6203-6208. [DOI: 10.1021/acs.orglett.0c02340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Li Y, Li F, Shi S. Expedient Synthesis of Ketones
via
N
‐Heterocyclic
Carbene/
Nickel‐Catalyzed Redox‐Economical
Coupling of Alcohols and Alkynes
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000019] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yu‐Qing Li
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Feng Li
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Shi‐Liang Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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13
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Shirai T, Iwasaki T, Kanemoto K, Yamamoto Y. Cationic Iridium/Chiral Bisphosphine‐Catalyzed Enantioselective Hydroacylation of Ketones. Chem Asian J 2020; 15:1858-1862. [DOI: 10.1002/asia.202000386] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/09/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Tomohiko Shirai
- Department of Social Design Engineering National Institute of Technology Kochi College 200-1 Monobe Otsu Nankoku Kochi 783-8508 Japan
| | - Tomoya Iwasaki
- Department of Materials Science and Engineering National Institute of Technology Kochi College 200-1 Monobe otsu Nankoku Kochi 783-8508 Japan
| | - Kazuya Kanemoto
- Department of Applied Chemistry Institute of Science and Engineering Chuo University Kasuga 1–3-27 Bunkyo-ku Tokyo 112-8551 Japan
| | - Yasunori Yamamoto
- Division of Applied Chemistry and Frontier Chemistry Center (FCC) Faculty of Engineering Hokkaido University Kita 13 Nishi 8, Kita-ku Sapporo Hokkaido 060-8628 Japan
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14
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McKay AI, Barwick‐Silk J, Savage M, Willis MC, Weller AS. Synthesis of Highly Fluorinated Arene Complexes of [Rh(Chelating Phosphine)] + Cations, and their use in Synthesis and Catalysis. Chemistry 2020; 26:2883-2889. [PMID: 31749160 PMCID: PMC7078928 DOI: 10.1002/chem.201904668] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/19/2019] [Indexed: 11/17/2022]
Abstract
The synthesis of rhodium complexes with weakly binding highly fluorinated benzene ligands is described: 1,2,3-F3 C6 H3 , 1,2,3,4-F4 C6 H2 and 1,2,3,4,5-F5 C6 H are shown to bind with cationic [Rh(Cy2 P(CH2 )x PCy2 )]+ fragments (x=1, 2). Their structures and reactivity with alkenes, and use in catalysis for promoting the Tishchenko reaction of a simple aldehyde, are demonstrated. Key to the synthesis of these complexes is the highly concentrated reaction conditions and use of the [Al{OC(CF3 )3 }4 ]- anion.
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Affiliation(s)
- Alasdair I. McKay
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - James Barwick‐Silk
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Max Savage
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Michael C. Willis
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
| | - Andrew S. Weller
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
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15
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Kireev NV, Filippov OA, Gulyaeva ES, Shubina ES, Vendier L, Canac Y, Sortais JB, Lugan N, Valyaev DA. Bis[diphenylphosphino]methane and its bridge-substituted analogues as chemically non-innocent ligands for H2 activation. Chem Commun (Camb) 2020; 56:2139-2142. [DOI: 10.1039/c9cc07713h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Interconversion between coordinated diphosphinomethane and diphosphinomethanide moieties can be used as a new tool for metal–ligand cooperation.
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Affiliation(s)
- Nikolay V. Kireev
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)
- Russian Academy of Sciences
- Moscow
- Russia
- Department of Chemistry
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)
- Russian Academy of Sciences
- Moscow
- Russia
| | - Ekaterina S. Gulyaeva
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)
- Russian Academy of Sciences
- Moscow
- Russia
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS)
- Russian Academy of Sciences
- Moscow
- Russia
- Peoples Friendship University of Russia (RUDN University)
| | | | - Yves Canac
- LCC-CNRS
- Université de Toulouse
- CNRS
- Cedex 4
- France
| | | | - Noël Lugan
- LCC-CNRS
- Université de Toulouse
- CNRS
- Cedex 4
- France
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16
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Zhou B, Wu Q, Dong Z, Xu J, Yang Z. Rhodium-Catalyzed 1,1-Hydroacylation of Thioacyl Carbenes with Alkynyl Aldehydes and Subsequent Cyclization. Org Lett 2019; 21:3594-3599. [DOI: 10.1021/acs.orglett.9b01003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Bingnan Zhou
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Qiuyue Wu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Ziyang Dong
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Zhanhui Yang
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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17
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Zhu F, Rodriguez J, O’Neill S, Walczak MA. Acyl Glycosides through Stereospecific Glycosyl Cross-Coupling: Rapid Access to C(sp 3)-Linked Glycomimetics. ACS CENTRAL SCIENCE 2018; 4:1652-1662. [PMID: 30648149 PMCID: PMC6311691 DOI: 10.1021/acscentsci.8b00628] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Indexed: 05/04/2023]
Abstract
Replacement of a glycosidic bond with hydrolytically stable C-C surrogates is an efficient strategy to access glycomimetics with improved physicochemical and pharmacological properties. We describe here a stereoretentive cross-coupling reaction of glycosyl stannanes with C(sp2)- and C(sp3)-thio(seleno)esters suitable for the preparation C-acyl glycosides as synthetic building blocks to obtain C(sp3)-linked and fluorinated glycomimetics. First, we identified a set of standardized conditions employing a Pd(0) precatalyst, CuCl additive, and phosphite ligand that provided access to C-acyl glycosides without deterioration of anomeric integrity and decarbonylation of the acyl donors (>40 examples). Second, we demonstrated that C(sp3)-glycomimetics could be introduced into the anomeric position via a direct conversion of C1 ketones. Specifically, the conversion of the carbonyl group into a CF2 mimetic is an appealing method to access valuable fluorinated analogues. We also illustrate that the introduction of other carbonyl-based groups into the C1 position of mono- and oligosaccharides can be accomplished using the corresponding acyl donors. This protocol is amenable to late-stage glycodiversification and programmed mutation of the C-O bond into hydrolytically stable C-C bonds. Taken together, stereoretentive anomeric acylation represents a convenient method to prepare a diverse set of glycan mimetics with minimal synthetic manipulations and with absolute control of anomeric configuration.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Jacob Rodriguez
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Sloane O’Neill
- 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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18
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Coles NT, Mahon MF, Webster RL. 1,1-Diphosphines and divinylphosphines via base catalyzed hydrophosphination. Chem Commun (Camb) 2018; 54:10443-10446. [PMID: 30152503 DOI: 10.1039/c8cc05890c] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalytic hydrophosphination route to 1,1-diphosphines is yet to be reported: these narrow bite angle pro-ligands have been used to great effect as ligands in homogeneous catalysis. We herein demonstrate that terminal alkynes readily undergo double hydrophosphination with HPPh2 and catalytic potassium hexamethyldisilazane (KHMDS) to generate 1,1-diphosphines. A change to H2PPh leads to the formation of P,P-divinyl phosphines.
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Affiliation(s)
- N T Coles
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
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19
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Oßwald S, Casper LA, Anders P, Schiebel E, Demeshko S, Winter RF. Electrochemical, Spectroelectrochemical, Mößbauer, and EPR Spectroscopic Studies on Ferrocenyl-Substituted Tritylium Dyes. Chemistry 2018; 24:12524-12538. [PMID: 29904938 DOI: 10.1002/chem.201802364] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 06/12/2018] [Indexed: 11/09/2022]
Abstract
Four monoferrocenyl tritylium derivatives with donor-substituted (OMe, NMe2 ) aryl rings are reported, along with their spectroscopic and electrochemical properties. All the complexes show a one-electron reduction and a quasi-reversible ferrocene oxidation at a very positive potential. Small quadrupole splittings, ΔEQ , in Mößbauer spectra agree with highly electron-deficient ferrocenes. Comparison of the experimental half-wave potentials for ferrocene oxidation, E1/2 (Fc/Fc+ ), with those estimated from established correlations of E1/2 (Fc/Fc+ ) with ΔEQ indicates that the E1/2 values of the anisyl-substituted congeners FcOMe+ and FcMeOMe+ are affected by Coulombic repulsion between the positive charges at the Fe ion and the neighboring methylium site. Electronic spectra are recorded and interpreted with the aid of quantum chemical calculations. UV/Vis spectroelectrochemical measurements as well as chemical reduction provide insight into the redox-induced color changes upon ferrocene oxidation or upon reduction to the neutral trityl radicals. The neutral radicals reversibly form EPR-silent dimers. This process is studied by temperature-dependent EPR spectroscopy, and thermodynamic data for their dimerization are determined. Experimental and quantum chemical data suggest that the dimers assume classical hexaarylethane structures as opposed to normal or "offset" Jacobson-Nauta-type structures.
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Affiliation(s)
- Steffen Oßwald
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Larissa A Casper
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Patrick Anders
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Eva Schiebel
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Serhiy Demeshko
- Fakultät für Chemie, Georg-August-Universität Göttingen, Tammannstrasse 4, 37077, Göttingen, Germany
| | - Rainer F Winter
- Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
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20
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Barwick-Silk J, Hardy S, Willis MC, Weller AS. Rh(DPEPhos)-Catalyzed Alkyne Hydroacylation Using β-Carbonyl-Substituted Aldehydes: Mechanistic Insight Leads to Low Catalyst Loadings that Enables Selective Catalysis on Gram-Scale. J Am Chem Soc 2018; 140:7347-7357. [PMID: 29763563 DOI: 10.1021/jacs.8b04086] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The detailed mechanism of the hydroacylation of β-amido-aldehyde, 2,2-dimethyl-3-morpholino-3-oxopropanal, with 1-octyne using [Rh( cis-κ2-P,P-DPEPhos)(acetone)2][BArF4]-based catalysts, is described [ArF = (CF3)2C6H3]. A rich mechanistic landscape of competing and interconnected hydroacylation and cyclotrimerization processes is revealed. An acyl-hydride complex, arising from oxidative addition of aldehyde, is the persistent resting state during hydroacylation, and quaternary substitution at the β-amido-aldehyde strongly disfavors decarbonylation. Initial rate, KIE, and labeling studies suggest that the migratory insertion is turnover-limiting as well as selectivity determining for linear/branched products. When the concentration of free aldehyde approaches zero at the later stages of catalysis alkyne cyclotrimerization becomes competitive, to form trisubstituted hexylarenes. At this point, the remaining acyl-hydride turns over in hydroacylation and the free alkyne is now effectively in excess, and the resting state moves to a metallacyclopentadiene and eventually to a dormant α-pyran-bound catalyst complex. Cyclotrimerization thus only becomes competitive when there is no aldehyde present in solution, and as aldehyde binds so strongly to form acyl-hydride when this happens will directly correlate to catalyst loading: with low loadings allowing for free aldehyde to be present for longer, and thus higher selectivites to be obtained. Reducing the catalyst loading from 20 mol % to 0.5 mol % thus leads to a selectivity increase from 96% to ∼100%. An optimized hydroacylation reaction is described that delivers gram scale of product, at essentially quantitative levels, using no excess of either reagent, at very low catalyst loadings, using minimal solvent, with virtually no workup.
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Affiliation(s)
- James Barwick-Silk
- Department of Chemistry, Chemistry Research Laboratories , University of Oxford , Mansfield Road , Oxford OX1 4TA , U.K
| | - Simon Hardy
- Early Chemical Development , Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca , Macclesfield SK10 2NA , U.K
| | - Michael C Willis
- Department of Chemistry, Chemistry Research Laboratories , University of Oxford , Mansfield Road , Oxford OX1 4TA , U.K
| | - Andrew S Weller
- Department of Chemistry, Chemistry Research Laboratories , University of Oxford , Mansfield Road , Oxford OX1 4TA , U.K
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21
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Selvakumar S, Kang QK, Arumugam N, Almansour AI, Kumar RS, Maruoka K. Hypervalent iodine(III) catalyzed radical hydroacylation of chiral alkylidenemalonates with aliphatic aldehydes under photolysis. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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22
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Guo R, Zhang G. Expedient Synthesis of 1,5-Diketones by Rhodium-Catalyzed Hydroacylation Enabled by C–C Bond Cleavage. J Am Chem Soc 2017; 139:12891-12894. [DOI: 10.1021/jacs.7b05427] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Rui Guo
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, University of
Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, P. R. China
| | - Guozhu Zhang
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, University of
Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, P. R. China
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23
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Coxon TJ, Fernández M, Barwick-Silk J, McKay AI, Britton LE, Weller AS, Willis MC. Exploiting Carbonyl Groups to Control Intermolecular Rhodium-Catalyzed Alkene and Alkyne Hydroacylation. J Am Chem Soc 2017; 139:10142-10149. [DOI: 10.1021/jacs.7b05713] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Thomas J. Coxon
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Maitane Fernández
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - James Barwick-Silk
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Alasdair I. McKay
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Louisa E. Britton
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Andrew S. Weller
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
| | - Michael C. Willis
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford OX1 3TA, U.K
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24
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Gao M, Willis MC. Enantioselective Three-Component Assembly of β'-Aryl Enones Using a Rhodium-Catalyzed Alkyne Hydroacylation/Aryl Boronic Acid Conjugate Addition Sequence. Org Lett 2017; 19:2734-2737. [PMID: 28485946 DOI: 10.1021/acs.orglett.7b01087] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Rhodium-catalyzed alkyne hydroacylation using alkyl β-S-aldehydes, enantioselective rhodium-catalyzed aryl boronic acid conjugate addition, and sulfide elimination are combined in sequence to provide β'-aryl enones. The reaction sequence is efficient and delivers highly functionalized products with excellent levels of enantiocontrol. Good variation of the three reaction components is demonstrated. The sequence corresponds to the formal regio- and enantioselective monoconjugate addition of aryl boronic acids to dienones.
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Affiliation(s)
- Ming Gao
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
| | - Michael C Willis
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
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25
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Mansell SM. Catalytic applications of small bite-angle diphosphorus ligands with single-atom linkers. Dalton Trans 2017; 46:15157-15174. [DOI: 10.1039/c7dt03395h] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Diphosphorus ligands connected by a single atom (R2PEPR2; E = CR2, CCR2and NR) give chelating ligands with very small bite-angles as well as enable access to other properties such as bridging modes and hemilability. ThisPerspectivereviews the properties of diphosphorus ligands featuring a single-atom linker and their applications in catalysis, including transformations of alkenes and transfer hydrogenation and hydrogen-borrowing reactions.
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Affiliation(s)
- S. M. Mansell
- Institute of Chemical Sciences
- Heriot-Watt University
- Edinburgh
- UK
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26
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Fernández M, Castaing M, Willis MC. Sequential catalysis: exploiting a single rhodium(i) catalyst to promote an alkyne hydroacylation-aryl boronic acid conjugate addition sequence. Chem Sci 2017; 8:536-540. [PMID: 28451201 PMCID: PMC5351800 DOI: 10.1039/c6sc03066a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 09/01/2016] [Indexed: 12/20/2022] Open
Abstract
We demonstrate that a single Rh(i) complex can promote two mechanistically distinct C-C bond-forming reactions - alkyne hydroacylation and aryl boronic acid conjugate addition - to deliver substituted ketone products from the controlled assembly of three readily available fragments. This is a rare example of a Rh(i)/Rh(iii) cycle and a redox neutral Rh(i) cycle being promoted by a single catalyst. The process is broad in scope, allowing significant variation of all three reaction components. Incorporation of an enantiomerically pure bis-phosphine ligand renders the process enantioselective. Superior levels of enantioselectivity (up to >99% ee) can be achieved from using a two catalyst system, whereby two Rh(i) complexes, one incorporating an achiral bis-phosphine ligand and the second a chiral diene ligand, are introduced at the start of the reaction sequence.
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Affiliation(s)
- Maitane Fernández
- Department of Chemistry , University of Oxford , Chemical Research Laboratory , Mansfield Road , Oxford , OX1 3TA , UK .
| | - Matthias Castaing
- Department of Chemistry , University of Oxford , Chemical Research Laboratory , Mansfield Road , Oxford , OX1 3TA , UK .
| | - Michael C Willis
- Department of Chemistry , University of Oxford , Chemical Research Laboratory , Mansfield Road , Oxford , OX1 3TA , UK .
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27
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Bouisseau A, Glancy J, Willis MC. Two-Component Assembly of Thiochroman-4-ones and Tetrahydrothiopyran-4-ones Using a Rhodium-Catalyzed Alkyne Hydroacylation/Thio-Conjugate-Addition Sequence. Org Lett 2016; 18:5676-5679. [PMID: 27779887 DOI: 10.1021/acs.orglett.6b02909] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
β'-Thio-substituted-enones, assembled from the combination of β-tert-butylthio-substituted aldehydes and alkynes, using rhodium catalysis, are shown to smoothly undergo in situ intramolecular S-conjugate addition to deliver a range of S-heterocycles in a one-pot process. Aryl, alkenyl, and alkyl aldehydes can all be employed, to provide thiochroman-4-ones, hexahydro-4H-thiochromen-4-ones, and tetrahydrothiopyran-4-ones, respectively. A variety of in situ oxidations are also performed, allowing access to S,S-dioxide derivatives, as well as unsaturated variants.
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Affiliation(s)
- Anaïs Bouisseau
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory , Mansfield Road, Oxford, OX1 3TA, U.K
| | - John Glancy
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory , Mansfield Road, Oxford, OX1 3TA, U.K
| | - Michael C Willis
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory , Mansfield Road, Oxford, OX1 3TA, U.K
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28
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Bouisseau A, Gao M, Willis MC. Traceless Rhodium-Catalyzed Hydroacylation Using Alkyl Aldehydes: The Enantioselective Synthesis of β-Aryl Ketones. Chemistry 2016; 22:15624-15628. [PMID: 27666437 PMCID: PMC5396316 DOI: 10.1002/chem.201604035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Indexed: 11/06/2022]
Abstract
A one-pot three-step sequence involving Rh-catalyzed alkene hydroacylation, sulfide elimination and Rh-catalyzed aryl boronic acid conjugate addition gave products of traceless chelation-controlled hydroacylation employing alkyl aldehydes. The stereodefined β-aryl ketones were obtained in good yields with excellent control of enantioselectivity. Good variation of all three reaction components is possible.
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Affiliation(s)
- Anaïs Bouisseau
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Ming Gao
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Michael C Willis
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
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29
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Johnson KF, Schneider EA, Schumacher BP, Ellern A, Scanlon JD, Stanley LM. Rhodium-Catalyzed Enantioselective Intramolecular Hydroacylation of Trisubstituted Alkenes. Chemistry 2016; 22:15619-15623. [DOI: 10.1002/chem.201603880] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Indexed: 01/26/2023]
Affiliation(s)
| | | | - Brian P. Schumacher
- Department of Chemistry; Ripon College; Ripon WI 54971 USA
- Department of Chemistry; Iowa State University; Ames IA 50010 USA
| | - Arkady Ellern
- Department of Chemistry; Iowa State University; Ames IA 50010 USA
| | | | - Levi M. Stanley
- Department of Chemistry; Iowa State University; Ames IA 50010 USA
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30
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Theron R, Wu Y, Yunker LPE, Hesketh AV, Pernik I, Weller AS, McIndoe JS. Simultaneous Orthogonal Methods for the Real-Time Analysis of Catalytic Reactions. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01489] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robin Theron
- Department
of Chemistry, University of Victoria, P.O. Box 3065 Victoria, British Columbia V8W3 V6, Canada
| | - Yang Wu
- Department
of Chemistry, University of Victoria, P.O. Box 3065 Victoria, British Columbia V8W3 V6, Canada
| | - Lars P. E. Yunker
- Department
of Chemistry, University of Victoria, P.O. Box 3065 Victoria, British Columbia V8W3 V6, Canada
| | - Amelia V. Hesketh
- Department
of Chemistry, University of Victoria, P.O. Box 3065 Victoria, British Columbia V8W3 V6, Canada
| | - Indrek Pernik
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Andrew S. Weller
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - J. Scott McIndoe
- Department
of Chemistry, University of Victoria, P.O. Box 3065 Victoria, British Columbia V8W3 V6, Canada
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31
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Majhail MK, Ylioja PM, Willis MC. Direct Synthesis of Highly Substituted Pyrroles and Dihydropyrroles Using Linear Selective Hydroacylation Reactions. Chemistry 2016; 22:7879-84. [PMID: 27106284 PMCID: PMC5074311 DOI: 10.1002/chem.201600311] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Indexed: 11/11/2022]
Abstract
Rhodium(I) catalysts incorporating small bite-angle diphosphine ligands, such as (Cy2 P)2 NMe or bis(diphenylphosphino)methane (dppm), are effective at catalysing the union of aldehydes and propargylic amines to deliver the linear hydroacylation adducts in good yields and with high selectivities. In situ treatment of the hydroacylation adducts with p-TSA triggers a dehydrative cyclisation to provide the corresponding pyrroles. The use of allylic amines, in place of the propargylic substrates, delivers functionalised dihydropyrroles. The hydroacylation reactions can also be combined in a cascade process with a Rh(I) -catalysed Suzuki-type coupling employing aryl boronic acids, providing a three-component assembly of highly substituted pyrroles.
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Affiliation(s)
- Manjeet K Majhail
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Paul M Ylioja
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Michael C Willis
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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32
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McPherson KE, Bartolotti LJ, Morehead AT, Sargent AL. Utility of the Nudged Elastic Band Method in Identifying the Minimum Energy Path of an Elementary Organometallic Reaction Step. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kate E. McPherson
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Libero J. Bartolotti
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Andrew T. Morehead
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Andrew L. Sargent
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
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33
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Selvakumar S, Sakamoto R, Maruoka K. Diastereoselective Radical Hydroacylation of Alkylidenemalonates with Aliphatic Aldehydes Initiated by Photolysis of Hypervalent Iodine(III) Reagents. Chemistry 2016; 22:6552-5. [PMID: 27097595 DOI: 10.1002/chem.201600425] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 01/20/2023]
Abstract
Diastereoselective radical hydroacylation of chiral alkylidenemalonates with aliphatic aldehydes is realized by the combination of a hypervalent iodine(III) reagent and UV-light irradiation. The reaction is initiated by the photolysis of hypervalent iodine(III) reagents under mild, metal-free conditions, and is the first example of diastereoselective addition of acyl radicals to olefins to afford chiral ketones in a highly stereoselective fashion. The obtained optically active ketones are useful chiral synthons, as exemplified by the short formal synthesis of (-)-methyleneolactocin.
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Affiliation(s)
- Sermadurai Selvakumar
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan), Fax: (+81)75-753-4041
| | - Ryu Sakamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan), Fax: (+81)75-753-4041
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan), Fax: (+81)75-753-4041.
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34
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Xiao LJ, Fu XN, Zhou MJ, Xie JH, Wang LX, Xu XF, Zhou QL. Nickel-Catalyzed Hydroacylation of Styrenes with Simple Aldehydes: Reaction Development and Mechanistic Insights. J Am Chem Soc 2016; 138:2957-60. [DOI: 10.1021/jacs.6b00024] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | | | | | - Jian-Hua Xie
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | | | | | - Qi-Lin Zhou
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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35
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Hooper JF, Seo S, Truscott FR, Neuhaus JD, Willis MC. α-Amino Aldehydes as Readily Available Chiral Aldehydes for Rh-Catalyzed Alkyne Hydroacylation. J Am Chem Soc 2016; 138:1630-4. [DOI: 10.1021/jacs.5b11892] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joel F. Hooper
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
| | - Sangwon Seo
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
| | - Fiona R. Truscott
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
| | - James D. Neuhaus
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
| | - Michael C. Willis
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
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36
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Almenara N, Ibarlucea L, Mendicute-Fierro C, Seco JM, Rodríguez-Diéguez A, Garralda MA, Huertos MA. A pentacoordinated norbornenyl-acyl-rhodium(iii) complex as a likely intermediate in the catalytic hydroacylation of norbornadiene. Dalton Trans 2016; 45:18502-18509. [DOI: 10.1039/c6dt03778j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The isolated and characterized compounds hydrido-acyl-Rh(iii) and norbornenyl-acyl-Rh(iii) are active species in the hydroacylation of norbornadiene with quinoline-8-carbaldehyde.
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Affiliation(s)
- N. Almenara
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- San Sebastián
- Spain
| | - L. Ibarlucea
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- San Sebastián
- Spain
| | - C. Mendicute-Fierro
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- San Sebastián
- Spain
| | - J. M. Seco
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- San Sebastián
- Spain
| | | | - M. A. Garralda
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- San Sebastián
- Spain
| | - M. A. Huertos
- Facultad de Química de San Sebastián
- Universidad del País Vasco (UPV/EHU)
- San Sebastián
- Spain
- IKERBASQUE
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37
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Ghosh A, Johnson KF, Vickerman KL, Walker JA, Stanley LM. Recent advances in transition metal-catalysed hydroacylation of alkenes and alkynes. Org Chem Front 2016. [DOI: 10.1039/c6qo00023a] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This highlight presents advances in transition metal-catalysed alkene and alkyne hydroacylation over the past three years.
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Affiliation(s)
- Avipsa Ghosh
- Department of Chemistry
- Iowa State University
- Ames
- USA
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38
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Niu J, Willis MC. Heterocycle-derived β-S-enals as bifunctional linchpins for the catalytic synthesis of saturated heterocycles. Org Chem Front 2016. [DOI: 10.1039/c6qo00057f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We demonstrate how heterocycle-derived β-S-enals can be employed as bifunctional substrates in a cascade of two rhodium-catalysed C–C bond forming reactions – a hydroacylation followed by a Suzuki-type coupling – to deliver substituted heterocyclic products.
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Affiliation(s)
- Jingze Niu
- Department of Chemistry
- University of Oxford
- Chemical Research Laboratory
- Oxford
- UK
| | - Michael C. Willis
- Department of Chemistry
- University of Oxford
- Chemical Research Laboratory
- Oxford
- UK
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39
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Neuhaus JD, Willis MC. Homogeneous rhodium(i)-catalysis in de novo heterocycle syntheses. Org Biomol Chem 2016; 14:4986-5000. [DOI: 10.1039/c6ob00835f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rh(i)-catalysed reactions often employ mild reaction conditions and offer excellent functional group tolerance, making them ideal transformations for the preparation of complex molecules. This review surveys examples of these synthetically useful transformations as applied to the synthesis of various heterocycles.
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Affiliation(s)
- James D. Neuhaus
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
| | - Michael C. Willis
- Department of Chemistry
- Chemistry Research Laboratory
- University of Oxford
- Oxford
- UK
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40
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Todd DP, Thompson BB, Nett AJ, Montgomery J. Deoxygenative C-C Bond-Forming Processes via a Net Four-Electron Reductive Coupling. J Am Chem Soc 2015; 137:12788-91. [PMID: 26436636 DOI: 10.1021/jacs.5b08448] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The nickel-catalyzed coupling of enones or enals with alkynes in the presence of silane and titanium alkoxide reductants provides direct access to skipped diene products. The process involves a net four-electron reductive coupling and proceeds with deoxygenation of the starting enone or enal. A new class of well-defined nickel(0) precatalysts bearing an unhindered N-heterocyclic carbene ligand, which was developed in optimization of the process, is essential for the efficiency of the transformation. The strategy allows the high reactivity of α,β-unsaturated carbonyl substrates to be utilized in couplings with simultaneous extrusion of the oxygen atom, thus enabling a traceless strategy for alkene installation.
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Affiliation(s)
- David P Todd
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Benjamin B Thompson
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Alex J Nett
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - John Montgomery
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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