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Eames J, Weerasooriya N. Recent Studies on the Regioselective C-Protonation of Enol Derivatives using Carbonyl-Containing Proton Donors. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823401103168154] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Enolate protonation can occur by two different pathways. With strong acids regioselective protonation generally occurs on the oxygen of the enolate to give an enol and then acid catalysed tautomerisation leads directly to the thermody-namically preferred carbonyl motif. However, with much weaker acids kinetic protonation on carbon can occur to give directly the carbonyl derivative. This review discuss recent developments into the use of chelating acids to promote this stereochemically important C-protonation and we comment on factors that appear to promote this selectivity.
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Affiliation(s)
- Jason Eames
- Department of Chemistry, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
| | - Neluka Weerasooriya
- Department of Chemistry, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
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Leitner C, Gaich T. Total synthesis of (±)-20S-hydroxy-1,2-dehydro-pseudoaspidospermidine via a C–H activation/transannular cyclization strategy. Chem Commun (Camb) 2017; 53:7451-7453. [DOI: 10.1039/c7cc02699d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A total synthesis to the pseudoaspidospermidine family via a C–H activation/transannular cyclization strategy has been accomplished.
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Affiliation(s)
| | - Tanja Gaich
- University of Konstanz
- Department of Chemistry
- Konstanz
- Germany
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Liu H, Zheng K, Lu X, Wang X, Hong R. Study on the total synthesis of velbanamine: Chemoselective dioxygenation of alkenes with PIFA via a stop-and-flow strategy. Beilstein J Org Chem 2013; 9:983-90. [PMID: 23766815 PMCID: PMC3678578 DOI: 10.3762/bjoc.9.113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 04/18/2013] [Indexed: 11/23/2022] Open
Abstract
A "stop-and-flow" strategy was developed for the chemoselective dioxygenation of alkenes with a PIFA-initiated cyclization. This method is conceived for the desymmetrization of seco-diene, and a series of substituted 5-hydroxymethyl-γ-lactones were constructed after hydrolysis. This strategy also differentiates terminally substituted alkenes and constitutes a potentially novel synthetic approach for the efficient synthesis toward velbanamine.
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Affiliation(s)
- Huili Liu
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhengjiang 321004, China
| | - Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xiang Lu
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xiaoxia Wang
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhengjiang 321004, China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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Tricotet T, Brückner R. Enantio- and Diastereomerically Pure Decalins by Deslongchamps-Type Annulation of Dienolates Containing a Chiral Lactone Substituent. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601047] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Begum M, Chavda S, Coumbarides GS, Dingan M, Eames J, Suggate MJ, Weerasooriya N. Probing the regioselectiveC-deuteriation of lithium enolates derived from 2-methyl-tetralone in the presence of substituted tertiary amines. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.1089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Sundberg RJ, Smith SQ. The IBOGA alkaloids and their role as precursors of anti-neoplastic bisindole Catharanthus alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2003; 59:281-376. [PMID: 12561419 DOI: 10.1016/s0099-9598(02)59009-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Affiliation(s)
- Richard J Sundberg
- Department of Chemistry, University of Virginia, Charlottesville, Va., USA
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A stereoselective synthesis of naturally occurring (+)-20 R -dihydrocleavamine by photo-[2+2]-cycloreversion. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01538-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Laval G, Audran G, Galano JM, Monti H. A short and efficient enantiospecific synthesis of (+)-(2R, 6S)-cis-gamma-irone via a highly diastereoselective protonation. J Org Chem 2000; 65:3551-4. [PMID: 10843647 DOI: 10.1021/jo991903h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- G Laval
- Laboratoire de Réactivité Organique Sélective associé au CNRS Faculté des Sciences de St-Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
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Gerlach U, Haubenreich T, Hünig S. Enantioselektive Protonierung von Lacton-Enolaten. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/cber.19941271021] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Stereoselektive Protonierung von Carbanionen, 1. Diastereoselektive Protonierung von C – H-aktivierten Cyclohexan-Derivaten. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931260522] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Davies SG, Garrido NM, Ichihara O, Walters LAS. Asymmetric syntheses of β-phenylalanine, α-methyl-β-phenylalanines and derivatives. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/c39930001153] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Radunz HE, Eiermann V, Schneider G, Riethmüller A. A convenient approach to hydroxyethylene dipeptide isosteres as building blocks for enzyme inhibitors. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)96101-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Calmes M, Daunis J, Ismaili H, Jacquier R, Koudou J, Nkusi G, Zouanate A. Supramolecular asymmetric induction : A new concept applied to the supported enantioselective synthesis of α-amino acids. Tetrahedron 1990. [DOI: 10.1016/s0040-4020(01)87926-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Takano S, Kudo J, Takahashi M, Ogasawara K. Stereoselective kinetic protonation of chiral γ-lactone enolates. Tetrahedron Lett 1986. [DOI: 10.1016/s0040-4039(00)84541-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Hirai H, Sawada K, Aratani M, Hashimoto M. Synthetic studies on carbapenem antibiotics from penicillins. IV. Stereoselective kinetic protonation of a chiral azetidinone enolate. Tetrahedron Lett 1985. [DOI: 10.1016/s0040-4039(00)98326-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Peterson PE, Jensen BL. The preparation of 1,3-bis(trimethylsilyl)allene and the observation of the enantiomers using olefin complexing chiral shift reagents. Tetrahedron Lett 1984. [DOI: 10.1016/s0040-4039(01)81666-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hatakeyama S, Numata H, Takano S. A novel stereoselective synthesis of a chiral key intermediate for the preparation of vitamin D3. Tetrahedron Lett 1984. [DOI: 10.1016/s0040-4039(01)91090-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Takano S, Morikawa K, Hatakeyama S. Enantioselective synthesis of (-)-sarracenin using D-glucose as chiral template. Tetrahedron Lett 1983. [DOI: 10.1016/s0040-4039(00)81419-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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