1
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Cheang DMJ, Crompton JL, Amer MM, Battiti F, Skjelstad BB, Christensen KE, Barton P, Duarte F, Donohoe TJ. Dynamic Kinetic Resolution Allows Control of Remote Stereochemistry in Asymmetric Hydrogen Borrowing Alkylation. Angew Chem Int Ed Engl 2025; 64:e202424959. [PMID: 39907443 DOI: 10.1002/anie.202424959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2024] [Revised: 02/04/2025] [Accepted: 02/05/2025] [Indexed: 02/06/2025]
Abstract
A catalytic asymmetric method for the synthesis of γ-substituted ketones via hydrogen borrowing alkylation of both racemic linear precursors and 1,5-diols is described. The base mediated racemization of an intermediate cyclohexenone to facilitates a dynamic kinetic resolution, affording highly enantioenriched cyclohexanes in excellent yields, which could be further functionalized by removal of the Ph* group. DFT modelling revealed the mode of enantioinduction to be a stepwise process comprising of a hydride transfer and a coordination change to a π-allylic enolate complex with the iridium catalyst.
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Affiliation(s)
- Daniella M J Cheang
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Jessica L Crompton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Mostafa M Amer
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Francisco Battiti
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Bastian Bjerkem Skjelstad
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Kirsten E Christensen
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Peter Barton
- Oncology R&D, AstraZeneca, Cambridge Biomedical Campus, 1 Francis Crick Avenue, Cambridge, CB2 0AA, UK
| | - Fernanda Duarte
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Timothy J Donohoe
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
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2
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Mondal A, Phukan HJ, Mohar K, Pal D, Sharma R, Purkayastha S, Guha AK, Srimani D. Designing a NNO-manganese complex overcoming steric constraints in (de)hydrogenative coupling. Chem Commun (Camb) 2025; 61:4796-4799. [PMID: 40034079 DOI: 10.1039/d5cc00048c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2025]
Abstract
Herein, we have developed a NNO-manganese complex featuring a relatively low-congestion metal-ligand cooperative environment, one enabling the alkylation of bulky α-branched ketones with bulky alcohols. We demonstrated that while the efficiency of the catalyst in the dehydrogenation or transfer hydrogenation step is essential, chelation assistance is equally crucial for suppressing retro-aldol reactions, thereby ensuring the success of the process.
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Affiliation(s)
- Avijit Mondal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
| | - Hirak Jyoti Phukan
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
| | - Kailash Mohar
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
| | - Debjyoti Pal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
| | - Rahul Sharma
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
| | | | - Ankur Kanti Guha
- Advanced Computational Chemistry Centre, Cotton University, Guwahati 781001, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India.
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3
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Crompton JL, Jenkins TC, Rowe SM, Donohoe TJ. Hydrogen-Borrowing-Based Methods for the Construction of Quaternary Stereocentres. Angew Chem Int Ed Engl 2025; 64:e202423179. [PMID: 39786331 DOI: 10.1002/anie.202423179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2024] [Revised: 01/09/2025] [Accepted: 01/09/2025] [Indexed: 01/12/2025]
Abstract
Compounds containing quaternary stereocentres are a valuable motif in biologically active compounds. Herein we present our strategy to utilise the hydrogen borrowing manifold to access α-quaternary ketones via a tandem acceptorless dehydrogenation-cyclisation cascade. This new application of the methodology results in the formation of five- and six-membered carbocycles with a high degree of diastereoselectivity. Interestingly, benzylic alcohol substrates behaved anomalously and eliminated sulfinate in situ to give a set of rearranged α-quaternary ketone products.
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Affiliation(s)
- Jessica L Crompton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Timothy C Jenkins
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Sam M Rowe
- GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK
| | - Timothy J Donohoe
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
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4
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Mahale SD, Yadav V, Gonnade RG, Mhaske SB. Regio- and Stereoselective Construction of 1,3,5-Triaroylcyclohexanes via KO tBu-Mediated Cyclotrimerization of Aryl Vinyl Ketones. J Org Chem 2024; 89:17207-17212. [PMID: 39535148 DOI: 10.1021/acs.joc.4c01695] [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
Herein, we disclose a simple one-pot method for an efficient regio- and stereoselective synthesis of 1,3,5-triaroylcyclohexanes from aryl vinyl ketones using potassium tert-butoxide. The developed protocol allows the construction of various symmetrically substituted cyclohexanes in good to excellent yields. The major product 2 also can be converted to the product 3 (all equatorial) conveniently by acid catalysis. This protocol features a good substrate scope and functional group compatibility.
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Affiliation(s)
- Sachin D Mahale
- Division of Organic Chemistry, CSIR-National Chemical Laboratory (CSIR-NCL), Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Vinita Yadav
- Division of Organic Chemistry, CSIR-National Chemical Laboratory (CSIR-NCL), Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajesh G Gonnade
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Santosh B Mhaske
- Division of Organic Chemistry, CSIR-National Chemical Laboratory (CSIR-NCL), Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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5
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Le HV, Nguyen VTB, Le HX, Nguyen TT, Nguyen KD, Ho PH, Nguyen TTH. Green Synthesis of Diphenyl-Substituted Alcohols Via Radical Coupling of Aromatic Alcohols Under Transition-Metal-Free Conditions. ChemistryOpen 2024; 13:e202400139. [PMID: 39171770 PMCID: PMC11625937 DOI: 10.1002/open.202400139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/16/2024] [Indexed: 08/23/2024] Open
Abstract
Alcohols are common alkylating agents and starting materials alternative to harmful alkyl halides. In this study, a simple, benign and efficient pathway was developed to synthesize 1,3-diphenylpropan-1-ols via the β-alkylation of 1-phenylethanol with benzyl alcohols. Unlike conventional borrowing hydrogen processes in which alcohols were activated by transition-metal catalyzed dehydrogenation, in this work, t-BuONa was suggested to be a dual-role reagent, namely, both base and radical initiator, for the radical coupling of aromatic alcohols. The cross-coupling reaction readily proceeded under transition metal-free conditions and an inert atmosphere, affording 1,3-diphenylpropan-1-ol with an excellent yield. A good functional group tolerance in benzyl alcohols was observed, leading to the production of various phenyl-substituted propan-1-ol derivatives in moderate-to-good yields. The mechanistic studies proposed that the reaction could involve the formation of reactive radical anions by base-mediated deprotonation and single electron transfer.
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Affiliation(s)
- Ha V. Le
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet740010District 10, Ho Chi Minh CityVietnam
- Vietnam National University Ho Chi Minh CityLinh Trung Ward720400Thu Duc City, Ho Chi Minh CityVietnam
| | - Vy T. B. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet740010District 10, Ho Chi Minh CityVietnam
- Vietnam National University Ho Chi Minh CityLinh Trung Ward720400Thu Duc City, Ho Chi Minh CityVietnam
| | - Huy X. Le
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet740010District 10, Ho Chi Minh CityVietnam
- Vietnam National University Ho Chi Minh CityLinh Trung Ward720400Thu Duc City, Ho Chi Minh CityVietnam
| | - Tung T. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet740010District 10, Ho Chi Minh CityVietnam
- Vietnam National University Ho Chi Minh CityLinh Trung Ward720400Thu Duc City, Ho Chi Minh CityVietnam
| | - Khoa D. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet740010District 10, Ho Chi Minh CityVietnam
- Vietnam National University Ho Chi Minh CityLinh Trung Ward720400Thu Duc City, Ho Chi Minh CityVietnam
| | - Phuoc H. Ho
- Chemical Engineering, Competence Centre for CatalysisChalmers University of TechnologyGothenburgSE-412 96Sweden
| | - Thuong T. H. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet740010District 10, Ho Chi Minh CityVietnam
- Vietnam National University Ho Chi Minh CityLinh Trung Ward720400Thu Duc City, Ho Chi Minh CityVietnam
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6
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François J, Jacolot M, Popowycz F. Borrowing hydrogen C-alkylation with secondary saturated heterocyclic alcohols. Org Biomol Chem 2024; 22:4502-4507. [PMID: 38747070 DOI: 10.1039/d4ob00543k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
The borrowing hydrogen methodology (BH) has emerged as a powerful tool for the rapid construction of C-C bonds, offering a greener alternative to traditional multi-step syntheses. This methodology involves the activation of inactivated alcohols followed by condensation or aldolization, ultimately leading to the regeneration of the saturated product. Herein, we report the C-alkylation of a hindered ketone with challenging secondary saturated heterocyclic alcohols. Our study encompasses the optimization of reaction conditions using either an iridium or a ruthenium catalyst and exploration of substrate scope. We demonstrate the efficient synthesis of substituted pyrrolidines and piperidines directly from a triol precursor, showcasing the versatility of this methodology. Moreover, we illustrate the post-functionalization of BH products, significantly broadening their chemical utility.
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Affiliation(s)
- Jordan François
- INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621, Villeurbanne Cedex, France.
| | - Maïwenn Jacolot
- INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621, Villeurbanne Cedex, France.
| | - Florence Popowycz
- INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621, Villeurbanne Cedex, France.
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7
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Mullick S, Ghosh A, Banerjee D. Recent advances in cross-coupling of alcohols via borrowing hydrogen catalysis. Chem Commun (Camb) 2024; 60:4002-4014. [PMID: 38451211 DOI: 10.1039/d4cc00003j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Application of the borrowing hydrogen strategy facilitates utilization of abundantly available alcohols for linear or branched long-chain alcohols. Selective synthesis of such alcohols is highly challenging and involves the utilization of transition metal catalysts towards the desired cross-coupled product. Herein, we have highlighted recent advances (from 2015 to 2023) towards the synthesis of higher alcohols. Major focus has been given to the development of ligands, including transition metal catalysts. Judicious catalyst design plays a key role in the alkylation process and is summarised in this review.
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Affiliation(s)
- Suteerna Mullick
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Adrija Ghosh
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Debasis Banerjee
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
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8
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Mondal A, Phukan HJ, Pal D, Kumar S, Roy M, Srimani D. Well-Defined Mn(II)-complex Catalyzed Switchable De(hydrogenative) Csp 3 -H Functionalization of Methyl Heteroarenes: A Sustainable Approach for Diversification of Heterocyclic Motifs. Chemistry 2024; 30:e202303315. [PMID: 37933814 DOI: 10.1002/chem.202303315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/08/2023]
Abstract
Catalytic activities of Mn(I) complexes derived from expensive MnBr(CO)5 salt have been explored in various dehydrogenative transformations. However, the reactivity and selectivity of inexpensive high spin Mn(II) complexes are uncommon. Herein, we have synthesized four new Mn(II) complexes and explored switchable alkenylation and alkylation of methyl heteroarenes employing a single Mn(II)catalyst. The developed protocol selectively furnishes a series of functionalized E-heteroarenes and C-alkylated heteroarenes with good to excellent yields. Various medicinally and synthetically useful compounds are successfully synthesized using our developed protocol. Various controls and kinetics experiments were executed to shed light on the mechaism,which reveals that α-C-H bond breaking of alcohol is the slowest step.
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Affiliation(s)
- Avijit Mondal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Hirak Jyoti Phukan
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Debjyoti Pal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Saurabh Kumar
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Mithu Roy
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
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9
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Yus M, Nájera C, Foubelo F, Sansano JM. Metal-Catalyzed Enantioconvergent Transformations. Chem Rev 2023; 123:11817-11893. [PMID: 37793021 PMCID: PMC10603790 DOI: 10.1021/acs.chemrev.3c00059] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Indexed: 10/06/2023]
Abstract
Enantioconvergent catalysis has expanded asymmetric synthesis to new methodologies able to convert racemic compounds into a single enantiomer. This review covers recent advances in transition-metal-catalyzed transformations, such as radical-based cross-coupling of racemic alkyl electrophiles with nucleophiles or racemic alkylmetals with electrophiles and reductive cross-coupling of two electrophiles mainly under Ni/bis(oxazoline) catalysis. C-H functionalization of racemic electrophiles or nucleophiles can be performed in an enantioconvergent manner. Hydroalkylation of alkenes, allenes, and acetylenes is an alternative to cross-coupling reactions. Hydrogen autotransfer has been applied to amination of racemic alcohols and C-C bond forming reactions (Guerbet reaction). Other metal-catalyzed reactions involve addition of racemic allylic systems to carbonyl compounds, propargylation of alcohols and phenols, amination of racemic 3-bromooxindoles, allenylation of carbonyl compounds with racemic allenolates or propargyl bromides, and hydroxylation of racemic 1,3-dicarbonyl compounds.
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Affiliation(s)
- Miguel Yus
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
| | - Carmen Nájera
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
| | - Francisco Foubelo
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
- Departamento
de Química Orgánica and Instituto de Síntesis
Orgánica (ISO), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
| | - José M. Sansano
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
- Departamento
de Química Orgánica and Instituto de Síntesis
Orgánica (ISO), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
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10
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Gómez-Suárez A, Neumann CN. Stereochemistry in All Its Shapes and Forms: The 56 th Bürgenstock Conference. Angew Chem Int Ed Engl 2023; 62:e202309468. [PMID: 37590448 DOI: 10.1002/anie.202309468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Indexed: 08/19/2023]
Abstract
Acknowledging the crucial role of stereochemistry in fields as diverse as total synthesis, synthetic methodology, spectroscopy, and the study of the origin of life, the 56th SCS Conference on Stereochemistry, better known as the BÃ1/4rgenstock Conference, brought together a diverse range of chemistry expertise in Brunnen, Switzerland.
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Affiliation(s)
- Adrián Gómez-Suárez
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119, Wuppertal, Germany
| | - Constanze N Neumann
- Department of Heterogeneous Catalysis, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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11
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Smith LB, Armstrong RJ, Hou J, Smith E, Sze M, Sterling AJ, Smith A, Duarte F, Donohoe TJ. Redox Reorganization: Aluminium Promoted 1,5-Hydride Shifts Allow the Controlled Synthesis of Multisubstituted Cyclohexenes. Angew Chem Int Ed Engl 2023; 62:e202307424. [PMID: 37358307 PMCID: PMC10953022 DOI: 10.1002/anie.202307424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 06/27/2023]
Abstract
An efficient synthesis of cyclohexenes has been achieved from easily accessible tetrahydropyrans via a tandem 1,5-hydride shift-aldol condensation. We discovered that readily available aluminium reagents, e.g. Al2 O3 or Al(Ot Bu)3 are essential for this process, promoting the 1,5-hydride shift with complete regio- and enantiospecificity (in stark contrast to results obtained under basic conditions). The mild conditions, coupled with multiple methods available to access the tetrahydropyran starting materials makes this a versatile method with exceptional functional group tolerance. A wide range of cyclohexenes (>40 examples) have been prepared, many in enantiopure form, showing our ability to selectively install a substituent at each position around the newly forged cyclohexene ring. Experimental and computational studies revealed that aluminium serves a dual role in facilitating the hydride shift, activating both the alkoxide nucleophile and the electrophilic carbonyl group.
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Affiliation(s)
- Lewis B. Smith
- Chemistry Research LaboratoryUniversity of OxfordOX1 3TAOxfordUK
| | - Roly J. Armstrong
- Chemistry Research LaboratoryUniversity of OxfordOX1 3TAOxfordUK
- School of Natural and Environmental SciencesNewcastle UniversityNE1 7RUNewcastle Upon TyneUK
| | - Jingyan Hou
- Chemistry Research LaboratoryUniversity of OxfordOX1 3TAOxfordUK
| | - Edward Smith
- Chemistry Research LaboratoryUniversity of OxfordOX1 3TAOxfordUK
| | - Ming Sze
- Chemistry Research LaboratoryUniversity of OxfordOX1 3TAOxfordUK
| | | | - Alex Smith
- Syngenta, Jealott's Hill International Research CentreRG42 6EYBracknellBerkshireUK
| | - Fernanda Duarte
- Chemistry Research LaboratoryUniversity of OxfordOX1 3TAOxfordUK
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12
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Crompton JL, Frost JR, Rowe SM, Christensen KE, Donohoe TJ. Synthesis of Cyclopropanes via Hydrogen-Borrowing Catalysis. Org Lett 2023. [PMID: 37428545 PMCID: PMC10367074 DOI: 10.1021/acs.orglett.3c01768] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
Cyclopropanes are highly useful motifs that are often incorporated into drug candidates to improve potency, metabolic stability, or pharmacokinetic properties. An expedient method for the α-cyclopropanation of ketones using hydrogen borrowing (HB) catalysis is described. The transformation occurs via HB alkylation of a hindered ketone with subsequent intramolecular displacement of a pendant leaving group affording the cyclopropanated product. The leaving group can be installed in either the ketone or alcohol component of the HB system, giving access to α-cyclopropyl ketones via two complementary approaches. Conversion to the corresponding carboxylic acids can be achieved in a simple two-step sequence to afford synthetically useful 1,1-substituted spirocyclopropyl acid building blocks.
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Affiliation(s)
- Jessica L Crompton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, U.K
| | - James R Frost
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Sam M Rowe
- GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Kirsten E Christensen
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Timothy J Donohoe
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, U.K
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13
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Abstract
Herein, we have demonstrated a simple nickel-catalyzed C-3-selective alkylation of 2-oxindoles using a wide variety of secondary alkyl alcohols. As a special highlight, functionalization of the cholesterol derivative was reported. Control experiments, initial mechanistic studies, and deuterium-labeling experiments were performed for the alkylation process.
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Affiliation(s)
- Atanu Bera
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Adrija Ghosh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Debasis Banerjee
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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14
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Nandi PG, Thombare P, Prathapa SJ, Kumar A. Pincer-Cobalt-Catalyzed Guerbet-Type β-Alkylation of Alcohols in Air under Microwave Conditions. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Prasad Thombare
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | | | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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15
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Bains AK, Biswas A, Kundu A, Adhikari D. Nickel‐Catalysis Enabling α‐Alkylation of Ketones by Secondary Alcohols. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Amreen K Bains
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) – Mohali SAS Nagar Punjab-140306 India
| | - Ayanangshu Biswas
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) – Mohali SAS Nagar Punjab-140306 India
| | - Abhishek Kundu
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) – Mohali SAS Nagar Punjab-140306 India
| | - Debashis Adhikari
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) – Mohali SAS Nagar Punjab-140306 India
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16
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Hall CJJ, Marriott IS, Christensen KE, Day AJ, Goundry WRF, Donohoe TJ. Extension of hydrogen borrowing alkylation reactions for the total synthesis of (-)-γ-lycorane. Chem Commun (Camb) 2022; 58:4966-4968. [PMID: 35348143 DOI: 10.1039/d2cc01248k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The total synthesis of (-)-γ-lycorane (10 steps) and synthesis of (±)-γ-lycorane (8 steps) was completed from cyclohexenone. A new two step hydrogen borrowing alkylation of an aziridinyl alcohol, coupled with a Ph* (Me5C6) deprotection/cyclisation procedure was developed for de novo formation of the fused 6,5 heterocyclic ring. This work is one of the first examples of hydrogen borrowing C-C bond formation being used as a key step in a total synthesis project.
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Affiliation(s)
- Christopher J J Hall
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Indi S Marriott
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Kirsten E Christensen
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - Aaron J Day
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
| | - William R F Goundry
- Early Chemical Development, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield, UK
| | - Timothy J Donohoe
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
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17
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Pawar G, Ghouse SM, Kar S, Chelli SM, Dannarm SR, Gour J, Sonti R, Nanduri S. SmI2-mediated C-alkylation of Ketones with Alcohols in Microwave conditions: A Novel Route to Alkylated Ketones. Chem Asian J 2022; 17:e202200041. [PMID: 35191612 DOI: 10.1002/asia.202200041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/15/2022] [Indexed: 11/08/2022]
Abstract
A novel protocol is developed towards the preparation of alkylated ketones from alcohols in presence of catalytic amount of SmI 2 and base with the elimination of water as a single by-product under microwave irradiation conditions. Furthermore, applicability of this methodology to the synthesis of Donepezil and late-stage functionalization in Pregnenolone is also reported. Successful application of this methodology in Friedländer quinolone synthesis using 2-aminobenzyl alcohol and various acetophenones expand the synthetic utility of this protocol.
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Affiliation(s)
- Gaurav Pawar
- NIPER Hyderabad: National Institute of Pharmaceutical Education and Research Hyderabad, Chemical Sciences, INDIA
| | - Shaik Mahammad Ghouse
- NIPER Hyderabad: National Institute of Pharmaceutical Education and Research Hyderabad, Chemical Sciences, INDIA
| | - Swayamsiddha Kar
- Sri Satya Sai Institute of Higher Learning: Sri Sathya Sai University, Department of chemistry, INDIA
| | - Sai Manohar Chelli
- Sri Satya Sai Institute of Higher Learning: Sri Sathya Sai University, Department of chemistry, INDIA
| | - Srinivas Reddy Dannarm
- NIPER Hyderabad: National Institute of Pharmaceutical Education and Research Hyderabad, Pharmaceutical analysis, INDIA
| | - Jitendra Gour
- NIPER Hyderabad: National Institute of Pharmaceutical Education and Research Hyderabad, Chemical Sciences, INDIA
| | - Rajesh Sonti
- NIPER Hyderabad: National Institute of Pharmaceutical Education and Research Hyderabad, Pharmaceutical analysis, INDIA
| | - Srinivas Nanduri
- National Institute of Pharmaceutical Education & Research, Process Chemistry, Balanagar, 500037, Hyderabad, INDIA
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18
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Paramonova P, Bakulina O, Nabiyev A, Dar'in D, Krasavin M. Castagnoli‐Cushman Reaction of 3‐Aryl Glutaric Acids: A Convenient, Diastereoselective Reaction for 6‐Oxo‐2,4‐diarylpiperidine‐3‐carboxylic Acid Scaffold. ChemistrySelect 2022. [DOI: 10.1002/slct.202104011] [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]
Affiliation(s)
- Polina Paramonova
- Institute of Chemistry Saint Petersburg State University Saint Petersburg 199034 Russia
| | - Olga Bakulina
- Institute of Chemistry Saint Petersburg State University Saint Petersburg 199034 Russia
| | - Alem Nabiyev
- Institute of Chemistry Saint Petersburg State University Saint Petersburg 199034 Russia
| | - Dmitry Dar'in
- Institute of Chemistry Saint Petersburg State University Saint Petersburg 199034 Russia
| | - Mikhail Krasavin
- Institute of Chemistry Saint Petersburg State University Saint Petersburg 199034 Russia
- Immanuel Kant Baltic Federal University Kaliningrad 236041 Russia
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19
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Narjinari H, Tanwar N, Kathuria L, Jasra RV, Kumar A. Guerbet-type β-alkylation of secondary alcohols catalyzed by chromium chloride and its corresponding NNN pincer complex. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00759b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
β-Alkylation of alcohols has been efficiently accomplished using readily available 3d metal Cr under microwave conditions in air. Well-defined molecular Cr is involved with a KIE of 7.33 and insertion of α-alkylated ketone into Cr–H bond as the RDS.
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Affiliation(s)
- Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Niharika Tanwar
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Lakshay Kathuria
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Raksh Vir Jasra
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Reliance Industries limited, R&D Centre, Vadodara Manufacturing Division, Vadodara, 391 346, Gujarat, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Jyoti and Bhupat School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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20
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Yu JX, Wu LJ, Wang ZQ, Xu ZF, Li JH. Palladium-catalyzed alkynylative [5 + 1] carboannulation of 1,3-diarylprop-2-yn-1-yl acetates with terminal alkynes enabled by C–H functionalization. Org Chem Front 2022. [DOI: 10.1039/d1qo01836a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using 1,3-diarylprop-2-yn-1-yl acetates as the five-carbon components enables alkynylative[5 + 1] carboannulation involving C–H functionalization toward 3-ethynyl-1-methylene-1,2-dihydronaphthalenes.
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Affiliation(s)
- Jiang-Xi Yu
- Key Laboratory of Functional Meta-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials (University of Hunan Province), Hengyang Normal University, Hengyang 421008, China
| | - Li-Jun Wu
- College of Sciences, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Zhi-Qiang Wang
- Key Laboratory of Functional Meta-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials (University of Hunan Province), Hengyang Normal University, Hengyang 421008, China
| | - Zhi-Feng Xu
- Key Laboratory of Functional Meta-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials (University of Hunan Province), Hengyang Normal University, Hengyang 421008, China
| | - Jin-Heng Li
- Key Laboratory of Functional Meta-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials (University of Hunan Province), Hengyang Normal University, Hengyang 421008, China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 475004, China
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21
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Nandi PG, Kumar P, Kumar A. Ligand-free Guerbet-type reactions in air catalyzed by in situ formed complexes of base metal salt cobaltous chloride. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02159a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Inexpensive, earth-abundant & environmentally benign CoCl2 efficiently catalyses the β-alkylation of alcohol in unprecedented yields (89%) & turnovers (8900). Mechanistic studies are indicative of in situ generated homogeneous molecular Co catalysts.
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Affiliation(s)
- Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Pradhuman Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- School of Health Science & Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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22
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Tomifuji R, Murano S, Kurahashi T, Matsubara S. FeBr3-catalyzed Fully Intermolecular [2+2+2] Cycloaddition of Alkenes. CHEM LETT 2021. [DOI: 10.1246/cl.210552] [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)
- Rei Tomifuji
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Shunpei Murano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Takuya Kurahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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23
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Bains AK, Kundu A, Maiti D, Adhikari D. Ligand-redox assisted nickel catalysis toward stereoselective synthesis of ( n+1)-membered cycloalkanes from 1, n-diols with methyl ketones. Chem Sci 2021; 12:14217-14223. [PMID: 34760207 PMCID: PMC8565367 DOI: 10.1039/d1sc04261k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/04/2021] [Indexed: 01/16/2023] Open
Abstract
A well-defined, bench-stable nickel catalyst is presented here, that can facilitate double alkylation of a methyl ketone to realize a wide variety of cycloalkanes. The performance of the catalyst depends on the ligand redox process comprising an azo-hydrazo couple. The source of the bis electrophile in this double alkylation is a 1,n-diol, so that (n+1)-membered cycloalkanes can be furnished in a stereoselective manner. The reaction follows a cascade of dehydrogenation/hydrogenation reactions and adopts a borrowing hydrogen (BH) method. A thorough mechanistic analysis including the interception of key radical intermediates and DFT calculations supports the ligand radical-mediated dehydrogenation and hydrogenation reactions, which is quite rare in BH chemistry. In particular, this radical-promoted hydrogenation is distinctly different from conventional hydrogenations involving a metal hydride and complementary to the ubiquitous two-electron driven dehydrogenation/hydrogenation reactions.
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Affiliation(s)
- Amreen K Bains
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali SAS Nagar Punjab-140306 India
| | - Abhishek Kundu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali SAS Nagar Punjab-140306 India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai Mumbai-400076 India
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali SAS Nagar Punjab-140306 India
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24
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Bera S, Kabadwal LM, Banerjee D. Recent advances in transition metal-catalyzed (1, n) annulation using (de)-hydrogenative coupling with alcohols. Chem Commun (Camb) 2021; 57:9807-9819. [PMID: 34486592 DOI: 10.1039/d1cc03404a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
(1,n) annulation reactions using (de)-hydrogenative coupling with alcohols or diols represent a straightforward technique for the synthesis of cyclic moieties. Utilization of such renewable resources for chemical transformations in a one-pot manner is the main focus, which avoids generation of stoichiometric waste. Application of such (1,n) annulation approaches drives the catalysis research in a more sustainable way and generates dihydrogen and water as by-products. This feature article highlights the recent (from 2015 to March 2021) progress in the synthesis of stereo-selective cycloalkanes and cycloalkenes, saturated and unsaturated N-heterocycles (cyclic amine, imide, lactam, tetrahydro β-carboline, quinazoline, quinazolinone, 1,3,5-triazines etc.) and other N-heterocycles with the formation of multiple bonds in a one pot operation. Mechanistic studies, new catalytic approaches, and synthetic applications including drug synthesis and post-drug derivatization, scope, and limitations are discussed.
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Affiliation(s)
- Sourajit Bera
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Lalit Mohan Kabadwal
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Debasis Banerjee
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
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25
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Chakraborty P, Sundararaju B, Manoury E, Poli R. New Borrowing Hydrogen Mechanism for Redox-Active Metals. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Institut Universitaire de France, 1, Rue Descartes, Paris Cedex 05 75231, France
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26
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27
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Babu R, Subaramanian M, Midya SP, Balaraman E. Nickel-Catalyzed Guerbet Type Reaction: C-Alkylation of Secondary Alcohols via Double (de)Hydrogenation. Org Lett 2021; 23:3320-3325. [PMID: 33881325 DOI: 10.1021/acs.orglett.1c00782] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Acceptorless double dehydrogenative cross-coupling of secondary and primary alcohols under nickel catalysis is reported. This Guerbet type reaction provides an atom- and a step-economical method for the C-alkylation of secondary alcohols under mild, benign conditions. A broad range of substrates including aromatic, cyclic, acyclic, and aliphatic alcohols was well tolerated. Interestingly, the C-alkylation of cholesterol derivatives and the double C-alkylation of cyclopentanol with various alcohols were also demonstrated.
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Affiliation(s)
- Reshma Babu
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Murugan Subaramanian
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Siba P Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
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28
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Sung K, Lee M, Cheong Y, Kim YK, Yu S, Jang H. Ir(NHC)‐Catalyzed Synthesis of β‐Alkylated Alcohols via Borrowing Hydrogen Strategy: Influence of Bimetallic Structure. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100219] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kihyuk Sung
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Mi‐hyun Lee
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Yeon‐Joo Cheong
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Yu Kwon Kim
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Sungju Yu
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Hye‐Young Jang
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
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29
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Reed-Berendt B, Latham DE, Dambatta MB, Morrill LC. Borrowing Hydrogen for Organic Synthesis. ACS CENTRAL SCIENCE 2021; 7:570-585. [PMID: 34056087 PMCID: PMC8155478 DOI: 10.1021/acscentsci.1c00125] [Citation(s) in RCA: 179] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Indexed: 05/03/2023]
Abstract
Borrowing hydrogen is a process that is used to diversify the synthetic utility of commodity alcohols. A catalyst first oxidizes an alcohol by removing hydrogen to form a reactive carbonyl compound. This intermediate can undergo a diverse range of subsequent transformations before the catalyst returns the "borrowed" hydrogen to liberate the product and regenerate the catalyst. In this way, alcohols may be used as alkylating agents whereby the sole byproduct of this one-pot reaction is water. In recent decades, significant advances have been made in this area, demonstrating many effective methods to access valuable products. This outlook highlights the diversity of metal and biocatalysts that are available for this approach, as well as the various transformations that can be performed, focusing on a selection of the most significant and recent advances. By succinctly describing and conveying the versatility of borrowing hydrogen chemistry, we anticipate its uptake will increase across a wider scientific audience, expanding opportunities for further development.
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30
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Frost JR, Cheong CB, Akhtar WM, Caputo DF, Christensen KE, Stevenson NG, Donohoe TJ. Hydrogen borrowing catalysis using 1° and 2° alcohols: Investigation and scope leading to α and β branched products. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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31
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Hall CJJ, Goundry WRF, Donohoe TJ. Hydrogen-Borrowing Alkylation of 1,2-Amino Alcohols in the Synthesis of Enantioenriched γ-Aminobutyric Acids. Angew Chem Int Ed Engl 2021; 60:6981-6985. [PMID: 33561302 PMCID: PMC8048514 DOI: 10.1002/anie.202100922] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Indexed: 12/22/2022]
Abstract
For the first time we have been able to employ enantiopure 1,2-amino alcohols derived from abundant amino acids in C-C bond-forming hydrogen-borrowing alkylation reactions. These reactions are facilitated by the use of the aryl ketone Ph*COMe. Racemisation of the amine stereocentre during alkylation can be prevented by the use of sub-stoichiometric base and protection of the nitrogen with a sterically hindered triphenylmethane (trityl) or benzyl group. The Ph* and trityl groups are readily cleaved in one pot to give γ-aminobutyric acid (GABA) products as their HCl salts without further purification. Both steps may be performed in sequence without isolation of the hydrogen-borrowing intermediate, removing the need for column chromatography.
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Affiliation(s)
- Christopher J. J. Hall
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - William R. F. Goundry
- Early Chemical DevelopmentPharmaceutical Sciences, R&DAstraZenecaMacclesfieldSK10 2NAUK
| | - Timothy J. Donohoe
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
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32
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Jiang L, Wang Z, Armstrong M, Suero MG. β-Diazocarbonyl Compounds: Synthesis and their Rh(II)-Catalyzed 1,3 C-H Insertions. Angew Chem Int Ed Engl 2021; 60:6177-6184. [PMID: 33275325 DOI: 10.1002/anie.202015077] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Indexed: 12/28/2022]
Abstract
Herein, we describe the first electrophilic diazomethylation of ketone silyl enol ethers with diazomethyl-substituted hypervalent iodine reagents that gives access to unusual β-diazocarbonyl compounds. The potential of this unexplored class of diazo compounds for the development of new reactions was demonstrated by the discovery of a rare Rh-catalyzed intramolecular 1,3 C-H carbene insertion that led to complex cyclopropanes with excellent stereocontrol.
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Affiliation(s)
- Liyin Jiang
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Zhaofeng Wang
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Melanie Armstrong
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Marcos G Suero
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
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33
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Alamillo-Ferrer C, Nielsen CDT, Salzano A, Companyó X, Di Sanza R, Spivey AC, Rzepa HS, Burés J. Understanding the Diastereopreference of Intermediates in Aminocatalysis: Application to the Chiral Resolution of Lactols. J Org Chem 2021; 86:4326-4335. [PMID: 33567827 DOI: 10.1021/acs.joc.0c02998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Downstream intermediates are crucial for the reactivity and selectivity of aminocatalytic reactions. We present an analysis of the stereopreference in aminocatalytic downstream intermediates, which reveals an inconspicuous mechanism of chiral recognition between the catalyst and the rest of the molecule. We delineate a stereoelectronic model to rationalize the mode of chiral transmission. We also exploit it for the resolution of chiral lactols relevant in organic synthesis as well as in the flavor and fragrance industry.
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Affiliation(s)
- Carla Alamillo-Ferrer
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Christian D-T Nielsen
- Imperial College London, White City Campus, Molecular Sciences Research Hub (MSRH), 81 Wood Lane, London, W12 0BZ, U.K
| | - Andrea Salzano
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Xavier Companyó
- Department of Inorganic and Organic Chemistry, Section of Organic Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Riccardo Di Sanza
- Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007, Tarragona, Spain
| | - Alan C Spivey
- Imperial College London, White City Campus, Molecular Sciences Research Hub (MSRH), 81 Wood Lane, London, W12 0BZ, U.K
| | - Henry S Rzepa
- Imperial College London, White City Campus, Molecular Sciences Research Hub (MSRH), 81 Wood Lane, London, W12 0BZ, U.K
| | - Jordi Burés
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
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34
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Hydrogen‐Borrowing Alkylation of 1,2‐Amino Alcohols in the Synthesis of Enantioenriched γ‐Aminobutyric Acids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100922] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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35
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Jiang L, Wang Z, Armstrong M, Suero MG. β‐Diazocarbonyl Compounds: Synthesis and their Rh(II)‐Catalyzed 1,3 C−H Insertions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Liyin Jiang
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Zhaofeng Wang
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Melanie Armstrong
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Marcos G. Suero
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
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36
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Dambatta MB, Santos J, Bolt RR, Morrill LC. Transition metal free α-C-alkylation of ketones using secondary alcohols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131571] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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37
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Kwok T, Hoff O, Armstrong RJ, Donohoe TJ. Control of Absolute Stereochemistry in Transition-Metal-Catalysed Hydrogen-Borrowing Reactions. Chemistry 2020; 26:12912-12926. [PMID: 32297370 PMCID: PMC7589454 DOI: 10.1002/chem.202001253] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/03/2020] [Indexed: 12/20/2022]
Abstract
Hydrogen-borrowing catalysis represents a powerful method for the alkylation of amine or enolate nucleophiles with non-activated alcohols. This approach relies upon a catalyst that can mediate a strategic series of redox events, enabling the formation of C-C and C-N bonds and producing water as the sole by-product. In the majority of cases these reactions have been employed to target achiral or racemic products. In contrast, the focus of this Minireview is upon hydrogen-borrowing-catalysed reactions in which the absolute stereochemical outcome of the process can be controlled. Asymmetric hydrogen-borrowing catalysis is rapidly emerging as a powerful approach for the synthesis of enantioenriched amine and carbonyl containing products and examples involving both C-N and C-C bond formation are presented. A variety of different approaches are discussed including use of chiral auxiliaries, asymmetric catalysis and enantiospecific processes.
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Affiliation(s)
- Timothy Kwok
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
| | - Oskar Hoff
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
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38
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Wübbolt S, Cheong CB, Frost JR, Christensen KE, Donohoe TJ. A Vinyl Cyclopropane Ring Expansion and Iridium-Catalyzed Hydrogen Borrowing Cascade. Angew Chem Int Ed Engl 2020; 59:11339-11344. [PMID: 32314851 PMCID: PMC7463175 DOI: 10.1002/anie.202003614] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/31/2020] [Indexed: 12/18/2022]
Abstract
A vinyl cyclopropane rearrangement embedded in an iridium-catalyzed hydrogen borrowing reaction enabled the formation of substituted stereo-defined cyclopentanes from Ph* methyl ketone and cyclopropyl alcohols. Mechanistic studies provide evidence for the ring-expansion reaction being the result of a cascade based on oxidation of the cyclopropyl alcohols, followed by aldol condensation with the pentamethyl phenyl-substituted ketone to form an enone containing the vinyl cyclopropane. Subsequent single electron transfer (SET) to this system initiates a rearrangement, and the catalytic cycle is completed by reduction of the new enone. This process allows for the efficient formation of diversely substituted cyclopentanes as well as the construction of complex bicyclic carbon skeletons containing up to four contiguous stereocentres, all with high diastereoselectivity.
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Affiliation(s)
- Simon Wübbolt
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
| | | | - James R. Frost
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
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39
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Chakraborty P, Garg N, Manoury E, Poli R, Sundararaju B. C-Alkylation of Various Carbonucleophiles with Secondary Alcohols under CoIII-Catalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01728] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, Uttar Pradesh, India
| | - Nidhi Garg
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, Uttar Pradesh, India
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, Uttar Pradesh, India
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40
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Nalikezhathu A, Cherepakhin V, Williams TJ. Ruthenium Catalyzed Tandem Pictet-Spengler Reaction. Org Lett 2020; 22:4979-4984. [PMID: 32558575 DOI: 10.1021/acs.orglett.0c01485] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a pyridyl-phosphine ruthenium(II) catalyzed tandem alcohol amination/Pictet-Spengler reaction sequence to synthesize tetrahydro-β-carbolines from an alcohol and tryptamine. Our conditions use a Lewis acid cocatalyst, In(OTf)3, that is compatible with typically base catalyzed amination and an acid catalyzed Pictet-Spengler cyclization. This method proceeds well with benzylic alcohols, heterocyclic carbinols, and aliphatic alcohols. We also show how combining this reaction with a subsequent cycloamination enables a direct synthesis of tetracyclic alkaloids like harmicine.
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Affiliation(s)
- Anju Nalikezhathu
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles California 90089-1661, United States
| | - Valeriy Cherepakhin
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles California 90089-1661, United States
| | - Travis J Williams
- Donald P. and Katherine B. Loker Hydrocarbon Institute and Department of Chemistry, University of Southern California, Los Angeles California 90089-1661, United States
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41
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Wübbolt S, Cheong CB, Frost JR, Christensen KE, Donohoe TJ. A Vinyl Cyclopropane Ring Expansion and Iridium‐Catalyzed Hydrogen Borrowing Cascade. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Simon Wübbolt
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | - Choon Boon Cheong
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | - James R. Frost
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
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42
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Bettoni L, Gaillard S, Renaud JL. Iron-Catalyzed α-Alkylation of Ketones with Secondary Alcohols: Access to β-Disubstituted Carbonyl Compounds. Org Lett 2020; 22:2064-2069. [PMID: 32091220 DOI: 10.1021/acs.orglett.0c00549] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An iron-catalyzed borrowing hydrogen strategy has been applied in the synthesis of β-branched carbonyl compounds. Various secondary benzylic and aliphatic alcohols have been used as alkylating reagents under mild reaction conditions. The ketones have been isolated in good to excellent yield. Deuterium labeling experiments provide evidence that the alcohol is the hydride source in this reaction and that no reversible step or hydrogen/deuterium scrambling takes place during the process.
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Affiliation(s)
- Léo Bettoni
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin,14000 Caen, France
| | - Sylvain Gaillard
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin,14000 Caen, France
| | - Jean-Luc Renaud
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin,14000 Caen, France
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43
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Smith LB, Armstrong RJ, Matheau-Raven D, Donohoe TJ. Chemo- and Regioselective Synthesis of Acyl-Cyclohexenes by a Tandem Acceptorless Dehydrogenation-[1,5]-Hydride Shift Cascade. J Am Chem Soc 2020; 142:2514-2523. [PMID: 31967814 PMCID: PMC7145340 DOI: 10.1021/jacs.9b12296] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
An
atom-economical methodology to access substituted acyl-cyclohexenes
from pentamethylacetophenone and 1,5-diols is described. This process is catalyzed by an
iridium(I) catalyst in conjunction with a bulky electron rich phosphine
ligand (CataCXium A) which favors acceptorless dehydrogenation over
conjugate reduction to the corresponding cyclohexane. The reaction
produces water and hydrogen gas as the sole byproducts and a wide
range of functionalized acyl-cyclohexene products can be synthesized
using this method in very high yields. A series of control experiments
were carried out, which revealed that the process is initiated by
acceptorless dehydrogenation of the diol followed by a redox-neutral
cascade process, which is independent of the iridium catalyst. Deuterium
labeling studies established that the key step of this cascade involves
a novel base-mediated [1,5]-hydride shift. The cyclohexenyl ketone
products could readily be cleaved under mildly acidic conditions to
access a range of valuable substituted cyclohexene derivatives.
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Affiliation(s)
- Lewis B Smith
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Roly J Armstrong
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Daniel Matheau-Raven
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Timothy J Donohoe
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford OX1 3TA , United Kingdom
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44
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Jana A, Das K, Kundu A, Thorve PR, Adhikari D, Maji B. A Phosphine-Free Manganese Catalyst Enables Stereoselective Synthesis of (1 + n)-Membered Cycloalkanes from Methyl Ketones and 1,n-Diols. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05567] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Akash Jana
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Kuhali Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Abhishek Kundu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
| | - Pradip Ramdas Thorve
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
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45
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Li X, Ouyang W, Nie J, Ji S, Chen Q, Huo Y. Recent Development on Cp*Ir(III)‐Catalyzed C−H Bond Functionalization. ChemCatChem 2020. [DOI: 10.1002/cctc.201902150] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xianwei Li
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Wensen Ouyang
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Jianhong Nie
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Shaomin Ji
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Qian Chen
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
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46
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Tang Y, Meador RIL, Malinchak CT, Harrison EE, McCaskey KA, Hempel MC, Funk TW. (Cyclopentadienone)iron-Catalyzed Transfer Dehydrogenation of Symmetrical and Unsymmetrical Diols to Lactones. J Org Chem 2020; 85:1823-1834. [PMID: 31880449 DOI: 10.1021/acs.joc.9b01884] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Air-stable iron carbonyl compounds bearing cyclopentadienone ligands with varying substitution were explored as catalysts in dehydrogenative diol lactonization reactions using acetone as both the solvent and hydrogen acceptor. Two catalysts with trimethylsilyl groups in the 2- and 5-positions, [2,5-(SiMe3)2-3,4-(CH2)4(η4-C4C═O)]Fe(CO)3 (1) and [2,5-(SiMe3)2-3,4-(CH2)3(η4-C4C═O)]Fe(CO)3 (2), were found to be the most active, with 2 being the most selective in the lactonization of diols containing both primary and secondary alcohols. Lactones containing five-, six-, and seven-membered rings were successfully synthesized, and no over-oxidations to carboxylic acids were detected. The lactonization of unsymmetrical diols containing two primary alcohols occurred with catalyst 1, but selectivity was low based on alcohol electronics and modest based on alcohol sterics. Evidence for a transfer dehydrogenation mechanism was found, and insight into the origin of selectivity in the lactonization of 1°/2° diols was obtained. Additionally, spectroscopic evidence for a trimethylamine-ligated iron species formed in solution during the reaction was discovered.
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Affiliation(s)
- Yidan Tang
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Rowan I L Meador
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Casina T Malinchak
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Emily E Harrison
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Kimberly A McCaskey
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Melanie C Hempel
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Timothy W Funk
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
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47
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Bettoni L, Gaillard S, Renaud JL. A phosphine-free iron complex-catalyzed synthesis of cycloalkanes via the borrowing hydrogen strategy. Chem Commun (Camb) 2020; 56:12909-12912. [PMID: 32996937 DOI: 10.1039/d0cc05840h] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Herein we report a diaminocyclopentadienone iron tricarbonyl complex catalyzed synthesis of substituted cyclopentane, cyclohexane and cycloheptane compounds using the borrowing hydrogen strategy in the presence of various substituted primary and secondary 1,n diols as alkylating reagents. Deuterium labeling experiments confirm that the diols were the hydride source in this cascade process.
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Affiliation(s)
- Léo Bettoni
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 Boulevard du Maréchal Juin, 14000 Caen, France.
| | - Sylvain Gaillard
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 Boulevard du Maréchal Juin, 14000 Caen, France.
| | - Jean-Luc Renaud
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 Boulevard du Maréchal Juin, 14000 Caen, France.
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48
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Das K, Yasmin E, Das B, Srivastava HK, Kumar A. Phosphine-free pincer-ruthenium catalyzed biofuel production: high rates, yields and turnovers of solventless alcohol alkylation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01679a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High TONs and TOFs are observed for the β-alkylation of alcohols using phosphine-free pincer-ruthenium catalysts at a very low base loading. Kinetic studies and DFT calculations were complementary and provide a clear understanding on the mechanism.
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Affiliation(s)
- Kanu Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Eileen Yasmin
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Babulal Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Hemant Kumar Srivastava
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research Guwahati
- Guwahati
- India
| | - Akshai Kumar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
- Centre for Nanotechnology
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49
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Cheang DMJ, Armstrong RJ, Akhtar WM, Donohoe TJ. Enantioconvergent alkylation of ketones with racemic secondary alcohols via hydrogen borrowing catalysis. Chem Commun (Camb) 2020; 56:3543-3546. [DOI: 10.1039/d0cc00767f] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An enantioconvergent hydrogen borrowing strategy enables the catalytic asymmetric alkylation of ketone enolates with unactivated, racemic secondary alcohols.
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50
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Chamberlain AER, Paterson KJ, Armstrong RJ, Twin HC, Donohoe TJ. A hydrogen borrowing annulation strategy for the stereocontrolled synthesis of saturated aza-heterocycles. Chem Commun (Camb) 2020; 56:3563-3566. [DOI: 10.1039/d0cc00903b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A hydrogen borrowing annulation strategy enables the stereocontrolled synthesis of C2, C3 and C4-substituted saturated aza-heterocycles.
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