1
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Asymmetric preparation of 2,4,
6‐trisubstituted
dihydropyridazinones. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12630] [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]
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2
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Feng GS, Zhao ZB, Shi L, Zhou YG. Synthesis of chiral piperazin-2-ones through palladium-catalyzed asymmetric hydrogenation of pyrazin-2-ols. Org Chem Front 2021. [DOI: 10.1039/d1qo01144h] [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
A palladium-catalyzed asymmetric hydrogenation of pyrazines containing a tautomeric hydroxyl group was developed, providing a facile access to chiral disubstituted piperazin-2-ones with excellent diastereoselectivities and enantioselectivities.
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Affiliation(s)
- Guang-Shou Feng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Zi-Biao Zhao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Lei Shi
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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3
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Kaplaneris N, Spyropoulos C, Kokotou MG, Kokotos CG. Enantioselective Organocatalytic Synthesis of 2-Oxopiperazines from Aldehydes: Identification of the Elusive Epoxy Lactone Intermediate. Org Lett 2016; 18:5800-5803. [PMID: 27792345 DOI: 10.1021/acs.orglett.6b02699] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An organocatalytic linchpin catalysis approach was envisaged to convert simple aldehydes into enantioenriched 2-oxopiperazines. A four-step reaction sequence (chlorination, oxidation, substitution, and cyclization) was developed and led to different substitution patterns in high yields and selectivities. The reaction mechanism was studied, and the previously elusive epoxy lactone intermediate was identified by HRMS.
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Affiliation(s)
- Nikolaos Kaplaneris
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens , Panepistimiopolis, Athens 15771, Greece
| | - Constantinos Spyropoulos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens , Panepistimiopolis, Athens 15771, Greece
| | - Maroula G Kokotou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens , Panepistimiopolis, Athens 15771, Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens , Panepistimiopolis, Athens 15771, Greece
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4
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Jain N, Bedekar AV. Roof shape chiral alcohol: auxiliary for asymmetric synthesis of α-halo acid derivatives. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Meninno S, Vidal-Albalat A, Lattanzi A. Asymmetric Epoxidation of Alkylidenemalononitriles: Key Step for One-Pot Approach to Enantioenriched 3-Substituted Piperazin-2-ones. Org Lett 2015; 17:4348-51. [DOI: 10.1021/acs.orglett.5b02186] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sara Meninno
- Dipartimento di Chimica e
Biologia, Università di Salerno, Via Giovanni Paolo II, 84084, Fisciano, Italy
| | - Andreu Vidal-Albalat
- Dipartimento di Chimica e
Biologia, Università di Salerno, Via Giovanni Paolo II, 84084, Fisciano, Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e
Biologia, Università di Salerno, Via Giovanni Paolo II, 84084, Fisciano, Italy
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6
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Perryman MS, Earl MWM, Greatorex S, Clarkson GJ, Fox DJ. Synthesis of 1- and 4-substituted piperazin-2-ones via Jocic-type reactions with N-substituted diamines. Org Biomol Chem 2015; 13:2360-5. [DOI: 10.1039/c4ob02311k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enantiomerically-enriched trichloromethyl-containing alcohols are transformed regioselectively into enantiomerically-enriched 1-substituted piperazinones by modified Jocic reactions.
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Affiliation(s)
| | | | - Sam Greatorex
- Department of Chemistry
- University of Warwick
- Coventry
- U.K
| | | | - David J. Fox
- Department of Chemistry
- University of Warwick
- Coventry
- U.K
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7
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Zaretsky S, Adachi S, Rotstein BH, Hickey JL, Scully CCG, St Denis JD, Courtemanche R, Yu JCY, Chung BKW, Yudin AK. Stereocontrolled disruption of the Ugi reaction toward the production of chiral piperazinones: substrate scope and process development. J Org Chem 2014; 79:9948-57. [PMID: 25254948 DOI: 10.1021/jo5018316] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The factors determining diastereoselectivity observed in the multicomponent conversion of amino acids, aziridine aldehyde dimers, and isocyanides into chiral piperazinones have been investigated. Amino acid-dependent selectivity for either trans- or cis-substituted piperazinone products has been achieved. An experimentally determined diastereoselectivity model for the three-component reaction driven by aziridine aldehyde dimers has predictive value for different substrate classes. Moreover, this model is useful in reconciling the previously reported observations in multicomponent reactions between isocyanides, α-amino acids, and monofunctional aldehydes.
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Affiliation(s)
- Serge Zaretsky
- Davenport Research Laboratories, Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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8
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Kim Y, Park KJ, Lee MS, Ryu H, Park YS. Dynamic Kinetic Resolution of L-Threonine-derived α-Bromo Esters for Asymmetric Synthesis of α-Amino Esters. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.1.265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Kim Y, Park KJ, Choi YS, Lee MS, Park YS. L-Lactate-mediated Dynamic Kinetic Resolution of α-Bromo Esters for Asymmetric Syntheses of α-Amino Acid Derivatives. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.8.2531] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Perryman MS, Harris ME, Foster JL, Joshi A, Clarkson GJ, Fox DJ. Trichloromethyl ketones: asymmetric transfer hydrogenation and subsequent Jocic-type reactions with amines. Chem Commun (Camb) 2013; 49:10022-4. [DOI: 10.1039/c3cc46070c] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Kim Y, Park KJ, Park YS. L-Tartaric Acid as a New Chiral Auxiliary for Asymmetric Synthesis of Piperazinones, Morpholinones, Dihydroquinoxalinones and Dihydrobenzoxazinones. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.11.3853] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Lorentz-Petersen LLR, Nordstrøm LU, Madsen R. Iridium-Catalyzed Condensation of Amines and Vicinal Diols to Substituted Piperazines. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201099] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Cohen DT, Eichman CC, Phillips EM, Zarefsky ER, Scheidt KA. Catalytic dynamic kinetic resolutions with N-heterocyclic carbenes: asymmetric synthesis of highly substituted β-lactones. Angew Chem Int Ed Engl 2012; 51:7309-13. [PMID: 22700327 PMCID: PMC3489928 DOI: 10.1002/anie.201203382] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Indexed: 11/11/2022]
Abstract
New DKR type: An N-heterocyclic carbene (NHC)-catalyzed dynamic kinetic resolution of racemic α-substituted β-keto esters has been developed. This method relies on the epimerization of an NHC-enol intermediate before subsequent aldol/acylation events. Highly substituted β-lactones are produced in good yield with good to excellent selectivities (see scheme).
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Affiliation(s)
- Daniel T. Cohen
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Chad C. Eichman
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Eric M. Phillips
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Emily R. Zarefsky
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
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14
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Cohen DT, Eichman CC, Phillips EM, Zarefsky ER, Scheidt KA. Catalytic Dynamic Kinetic Resolutions with N-Heterocyclic Carbenes: Asymmetric Synthesis of Highly Substituted β-Lactones. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203382] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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