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Zhang Y, Guo H, Wu Q, Bi X, Shi E, Xiao J. Stereoselective synthesis of ( E)-α,β-unsaturated esters: triethylamine-catalyzed allylic rearrangement of enol phosphates. RSC Adv 2023; 13:13511-13515. [PMID: 37181505 PMCID: PMC10173029 DOI: 10.1039/d3ra02430j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 04/27/2023] [Indexed: 05/16/2023] Open
Abstract
α,β-Unsaturated esters are key structural motifs widely distributed in various biologically active molecules, and their Z/E-stereoselective synthesis has always been considered highly attractive in organic synthesis. Herein, we present a >99% (E)-stereoselective one-pot synthetic approach towards β-phosphoroxylated α,β-unsaturated esters via a mild trimethylamine-catalyzed 1,3-hydrogen migration of the corresponding unconjugated intermediates derived from the solvent-free Perkow reaction between low-cost 4-chloroacetoacetates and phosphites. Versatile β,β-disubstituted (E)-α,β-unsaturated esters were thus afforded with full (E)-stereoretentivity by cleavage of the phosphoenol linkage via Negishi cross-coupling. Moreover, a stereoretentive (E)-rich mixture of a α,β-unsaturated ester derived from 2-chloroacetoacetate was obtained and both isomers were easily afforded in one operation.
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Affiliation(s)
- Yulong Zhang
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Huichuang Guo
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Qian Wu
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Xiaojing Bi
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Enxue Shi
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Junhua Xiao
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
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2
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Quevedo-Acosta Y, Jurberg ID, Gamba-Sánchez D. Cyclization Strategies Using Imide Derivatives for the Synthesis of Polycyclic Nitrogen‐Containing Compounds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200432] [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)
| | - Igor D. Jurberg
- Universidade Estadual de Campinas Institute of Chemistry 13083 BRAZIL
| | - Diego Gamba-Sánchez
- Universidad de Los Andes Chemistry Department Cra 1 No. 18A-12 Q:305 111711 Bogota COLOMBIA
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3
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Guo H, Zhang Y, Li Z, Zhao P, Li N, Shi E. Synthesis of enol phosphates directly from ketones via a modified one-pot Perkow reaction. RSC Adv 2022; 12:14844-14848. [PMID: 35702246 PMCID: PMC9112406 DOI: 10.1039/d2ra02340g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/03/2022] [Indexed: 12/04/2022] Open
Abstract
A modified Perkow reaction, named Perkow-Shi reaction, was developed based on the one-pot α-tosyloxylation of ketones following by addition of P(iii)-reagents and 4 Å molecular sieves. Diversity of enol phosphates, as well as enol phosphonates, enol phosphinates, and enol phosphoramidates were synthesized in high yields directly from the ubiquitously available ketones instead of the unfavourable α-chloroketones under a mild and environmental friendly condition. A modified Perkow reaction was developed based on the one-pot α-tosyloxylation of ketones following by addition of P(iii)-reagents and 4 Å molecular sieves.![]()
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Affiliation(s)
- Huichuang Guo
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Yulong Zhang
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Zhenya Li
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Peichao Zhao
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Ning Li
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
| | - Enxue Shi
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 P. R. China
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4
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Grosheva D, Cramer N. Ketene Aminal Phosphates: Competent Substrates for Enantioselective Pd(0)-Catalyzed C–H Functionalizations. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02783] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daria Grosheva
- Laboratory of Asymmetric
Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSA, BCH 4305, CH-1015 Lausanne, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric
Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSA, BCH 4305, CH-1015 Lausanne, Switzerland
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5
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Struth FR, Hirschhäuser C. A Modular Approach to the Asymmetric Synthesis of Cytisine. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501435] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Sivanandan ST, Shaji A, Ibnusaud I, Seechurn CCCJ, Colacot TJ. Palladium-Catalyzed α-Arylation Reactions in Total Synthesis. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403301] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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7
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Sallio R, Lebrun S, Gigant N, Gillaizeau I, Deniau E. Asymmetric Synthesis of 2-Heteroaryl Cyclic Amines: Total Synthesis of (-)-Anabasine. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402202] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Rouden J, Lasne MC, Blanchet J, Baudoux J. (−)-Cytisine and Derivatives: Synthesis, Reactivity, and Applications. Chem Rev 2013; 114:712-78. [DOI: 10.1021/cr400307e] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jacques Rouden
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Marie-Claire Lasne
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Jérôme Blanchet
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Jérôme Baudoux
- Laboratoire de Chimie Moléculaire
et Thioorganique, ENSICAEN-Université de Caen, CNRS, Institut Normand de Chimie Moléculaire, Médicinale et Macromoléculaire (INC3M), 6 Boulevard du Maréchal Juin, 14050 Caen, France
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9
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Molecular design, synthesis and physical properties of novel Cytisine-derivatives – Experimental and theoretical study. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.08.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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10
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Alix A, Lalli C, Retailleau P, Masson G. Highly enantioselective electrophilic α-bromination of enecarbamates: chiral phosphoric acid and calcium phosphate salt catalysts. J Am Chem Soc 2012; 134:10389-92. [PMID: 22686436 DOI: 10.1021/ja304095z] [Citation(s) in RCA: 152] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metal-free chiral phosphoric acids and chiral calcium phosphates both catalyze highly enantio- and diastereoselective electrophilic α-bromination of enecarbamates to provide an atom-economical synthesis of enantioenriched vicinal haloamines. Either enantiomer can be formed in good yield with excellent diastereo- and enantioselectivity simply by switching the catalyst from a phosphoric acid to its calcium salt.
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Affiliation(s)
- Aurélien Alix
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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11
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Nun P, Egbert JD, Oliva-Madrid MJ, Nolan SP. Gold(I)-catalyzed stereoselective synthesis of alkenyl phosphates by hydrophosphoryloxylation. Chemistry 2011; 18:1064-7. [PMID: 22184037 DOI: 10.1002/chem.201103304] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Pierrick Nun
- EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY 16 9ST, UK
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12
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Bélanger É, Pouliot MF, Courtemanche MA, Paquin JF. Design, Synthesis, and Applications of Potential Substitutes of t-Bu-Phosphinooxazoline in Pd-Catalyzed Asymmetric Transformations and Their Use for the Improvement of the Enantioselectivity in the Pd-Catalyzed Allylation Reaction of Fluorinated Allyl Enol Carbonates. J Org Chem 2011; 77:317-31. [DOI: 10.1021/jo2019653] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Étienne Bélanger
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Marie-France Pouliot
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Marc-André Courtemanche
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Jean-François Paquin
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
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13
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Sellars JD, Steel PG. Transition metal-catalysed cross-coupling reactions of P-activated enols. Chem Soc Rev 2011; 40:5170-80. [PMID: 21731959 DOI: 10.1039/c1cs15100b] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal catalysed cross-coupling reactions are ubiquitous in organic chemistry providing an impressive technique for C-C bond formation. Whilst many electrophilic partners have been described for these reactions, aryl and vinyl phosphates, phosphonates and phosphonites can offer advantages in terms of preparation, stability and reactivity profile. This critical review summarises the advances made to date utilising P-activated enols in metal-catalysed cross-coupling reactions (97 references).
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Affiliation(s)
- Jonathan D Sellars
- Department of Chemistry, University of Durham, Science Laboratories, South Road, Durham, DH1 3LE, UK.
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15
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Honda T. Development of Samarium Diiodide-Promoted Reductive Carbon-Nitrogen Bond Cleavage Reaction of α-Amino Carbonyl Compounds: Application to the Synthesis of Biologically Active Alkaloids. HETEROCYCLES 2011. [DOI: 10.3987/rev-10-684] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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G. Occhiato E, Prandi C, Scarpi D. Carbonylative Palladium-Catalyzed Reactions of Lactam-, Lactone-, and Thiolactone-Derived Vinyl Triflates and Phosphates for the Synthesis of N-, O-, and S-Heterocycles. HETEROCYCLES 2010. [DOI: 10.3987/rev-09-sr(s)5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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18
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Bélanger É, Pouliot MF, Paquin JF. Use of 5,5-(Dimethyl)-i-Pr-PHOX as a Practical Equivalent to t-Bu-PHOX in Asymmetric Catalysis. Org Lett 2009; 11:2201-4. [DOI: 10.1021/ol9005618] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Étienne Bélanger
- Canada Research Chair in Organic and Medicinal Chemistry, Département de chimie, 1045 avenue de la Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Marie-France Pouliot
- Canada Research Chair in Organic and Medicinal Chemistry, Département de chimie, 1045 avenue de la Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Jean-François Paquin
- Canada Research Chair in Organic and Medicinal Chemistry, Département de chimie, 1045 avenue de la Médecine, Université Laval, Québec, QC, Canada G1V 0A6
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19
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Claveau E, Gillaizeau I, Kalinowska-Tluscik J, Bouyssou P, Coudert G. Nucleophilic Addition onto Methyl-4H-1,4-oxazine-3-carboxylate Moiety: Short Access to 1,4-Diazine Privileged Substructures. J Org Chem 2009; 74:2911-4. [DOI: 10.1021/jo900291f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elise Claveau
- ICOA, UMR CNRS 6005, Université d’Orléans, 45067 Orléans Cedex 2, France, and Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland
| | - Isabelle Gillaizeau
- ICOA, UMR CNRS 6005, Université d’Orléans, 45067 Orléans Cedex 2, France, and Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland
| | - Justyna Kalinowska-Tluscik
- ICOA, UMR CNRS 6005, Université d’Orléans, 45067 Orléans Cedex 2, France, and Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland
| | - Pascal Bouyssou
- ICOA, UMR CNRS 6005, Université d’Orléans, 45067 Orléans Cedex 2, France, and Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland
| | - Gérard Coudert
- ICOA, UMR CNRS 6005, Université d’Orléans, 45067 Orléans Cedex 2, France, and Faculty of Chemistry, Jagiellonian University, ul. R. Ingardena 3, 30-060 Krakow, Poland
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20
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Chapter 4 Case History: Chantix™/Champix™ (Varenicline Tartrate), a Nicotinic Acetylcholine Receptor Partial Agonist as a Smoking Cessation Aid. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2009. [DOI: 10.1016/s0065-7743(09)04404-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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21
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Fuwa H, Sasaki M. Synthesis of 2-Substituted Indoles and Indolines via Suzuki−Miyaura Coupling/5-endo-trig Cyclization Strategies. J Org Chem 2008; 74:212-21. [PMID: 19007181 DOI: 10.1021/jo801985a] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Haruhiko Fuwa
- Laboratory of Biostructural Chemistry, Graduate School of Life Sciences, Tohoku University, 1-1 Tsutsumidori-amamiya, Aoba-ku, Sendai 981-8555, Japan
| | - Makoto Sasaki
- Laboratory of Biostructural Chemistry, Graduate School of Life Sciences, Tohoku University, 1-1 Tsutsumidori-amamiya, Aoba-ku, Sendai 981-8555, Japan
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22
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Demers S, Stevenson H, Candler J, Bashore CG, Arnold EP, O’Neill BT, Coe JW. Pyridine analogs of (−)-cytisine and varenicline: cholinergic receptor probes. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.03.133] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Yohannes D, Procko K, Lebel LA, Fox CB, O’Neill BT. Deconstructing cytisine: The syntheses of (±)-cyfusine and (±)-cyclopropylcyfusine, fused ring analogs of cytisine. Bioorg Med Chem Lett 2008; 18:2316-9. [DOI: 10.1016/j.bmcl.2008.02.078] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Revised: 02/27/2008] [Accepted: 02/29/2008] [Indexed: 10/22/2022]
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24
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Protti S, Fagnoni M. Phosphate esters as “tunable” reagents in organic synthesis. Chem Commun (Camb) 2008:3611-21. [DOI: 10.1039/b801888j] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Kozikowski AP, Chellappan SK, Xiao Y, Bajjuri KM, Yuan H, Kellar KJ, Petukhov PA. Chemical Medicine: Novel 10-Substituted Cytisine Derivatives with Increased Selectivity for α4β2 Nicotinic Acetylcholine Receptors. ChemMedChem 2007; 2:1157-61. [PMID: 17530728 DOI: 10.1002/cmdc.200700073] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alan P Kozikowski
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, USA.
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26
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Hansen AL, Ebran JP, Ahlquist M, Norrby PO, Skrydstrup T. Heck coupling with nonactivated alkenyl tosylates and phosphates: examples of effective 1,2-migrations of the alkenyl palladium(II) intermediates. Angew Chem Int Ed Engl 2007; 45:3349-53. [PMID: 16607665 DOI: 10.1002/anie.200600442] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anders L Hansen
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry and the Interdisciplinary, Nanoscience Center, University of Aarhus, Langelandsgade 140, 8000 Aarhus, Denmark
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Claveau E, Gillaizeau I, Blu J, Bruel A, Coudert G. Easy access to new heterocyclic systems: 1,4-oxazine and substituted 1,4-oxazines. J Org Chem 2007; 72:4832-6. [PMID: 17506583 DOI: 10.1021/jo070528n] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the course of our investigations on the synthesis of new nitrogen heterocyclic derivatives, we were interested in the synthesis and study of new 1,4-oxazine rings. To this aim, the desired bisvinylphosphate was prepared from N-Boc morpholine-3,5-dione and was then engaged in palladium-catalyzed reactions (reduction, Suzuki, and Stille cross-coupling reactions). The 1,4-oxazine and its corresponding 3,5-disubstituted derivatives were obtained in fair to good yields and were then functionalized under anionic conditions.
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Affiliation(s)
- Elise Claveau
- ICOA, UMR 6005, Université d'Orléans, BP 6759, 45067 Orléans cedex 2, France
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Ebran JP, Hansen AL, Gøgsig TM, Skrydstrup T. Studies on the Heck reaction with alkenyl phosphates: can the 1,2-migration be controlled? Scope and limitations. J Am Chem Soc 2007; 129:6931-42. [PMID: 17474745 DOI: 10.1021/ja070321b] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A catalyst system was identified which promotes the Heck coupling of nonactivated vinyl phosphates with electron deficient alkenes providing a new entry to diene products from simple and readily accessible starting materials. In contrast to our earlier work exploiting P(t-Bu)3 as the ligand in the presence of PdCl2(COD), the application of Buchwald's dialkylbiarylphosphines, X-Phos, effectively promoted the vinylic substitution with a wide range of alkenyl phosphates in the presence of 10 equiv of lithium chloride. Importantly, these reaction conditions suppressed 1,2-migration of the alkenyl palladium(II) intermediate. Further studies are also reported with the catalytic system which encourages isomerization in order to determine the range of vinyl phosphates that may participate in these coupling reactions. The extent of the 1,2-migration was dependent on the C1-substituent where best results were noted for substrates possessing a C1-alkyl quaternary carbon. Hence, with certain members of this class of alkenyl phosphates either the migrated or nonmigrated Heck products may be preferentially synthesized by selection of the phosphine ligand. Finally, competition experiments between an unactivated aryl chloride and a vinyl phosphate with a palladium catalyst possessing either X-Phos or P(t-Bu)3 as ligand demonstrated the ability to carry out Heck coupling reactions selectively with the aryl halide. Oxidative addition of the metal catalyst into the aryl chloride bond rather than the C-O bond of the alkenyl phosphate is therefore preferred.
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Affiliation(s)
- Jean-Philippe Ebran
- The Center for Insoluble Protein Structures inSPIN, Department of Chemistry, the Interdisciplinary Nanoscience Center, University of Aarhus, Langelandsgade 140, 8000 Aarhus, Denmark
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Bartali L, Guarna A, Larini P, Occhiato EG. Carbonylative Suzuki–Miyaura Coupling Reaction of Lactam-, Lactone-, and Thiolactone-Derived Enol Triflates for the Synthesis of Unsymmetrical Dienones. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601089] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Stead D, O'Brien P. Total synthesis of the lupin alkaloid cytisine: comparison of synthetic strategies and routes. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Woo GH, Kim SH, Wipf P. π-Allyl palladium approach toward the diazabicyclo[3.2.1]octane core of the naphthyridinomycin alkaloids. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.06.114] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Chellappan SK, Xiao Y, Tueckmantel W, Kellar KJ, Kozikowski AP. Synthesis and pharmacological evaluation of novel 9- and 10-substituted cytisine derivatives. Nicotinic ligands of enhanced subtype selectivity. J Med Chem 2006; 49:2673-6. [PMID: 16640326 PMCID: PMC2504867 DOI: 10.1021/jm051196m] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the synthesis and pharmacological properties of several cytisine derivatives. Among them, two 10-substituted derivatives showed much higher selectivities for the alpha4beta2 nAChR subtype in binding assays than cytisine. The 9-vinyl derivative was found to have a very similar agonist activity profile to that of cytisine.
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Affiliation(s)
- Sheela K Chellappan
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Illinois 60612, USA
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Hansen AL, Ebran JP, Ahlquist M, Norrby PO, Skrydstrup T. Heck Coupling with Nonactivated Alkenyl Tosylates and Phosphates: Examples of Effective 1,2-Migrations of the Alkenyl Palladium(II) Intermediates. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600442] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Gray D, Gallagher T. A Flexible Strategy for the Synthesis of Tri- and Tetracyclic Lupin Alkaloids: Synthesis of (+)-Cytisine, (±)-Anagyrine, and (±)-Thermopsine. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200504015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Gray D, Gallagher T. A Flexible Strategy for the Synthesis of Tri- and Tetracyclic Lupin Alkaloids: Synthesis of (+)-Cytisine, (±)-Anagyrine, and (±)-Thermopsine. Angew Chem Int Ed Engl 2006; 45:2419-23. [PMID: 16521145 DOI: 10.1002/anie.200504015] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Diane Gray
- School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
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36
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Sasaki M, Fuwa H, Kaneko A, Sugimoto Y, Tomita T, Iwatsubo T. Concise and Short Synthesis of Functionalized 5,6-Dihydropyridin-2-ones by Means of Palladium(0)-Catalyzed Cross-Coupling of Ketene Aminal Phosphates. HETEROCYCLES 2006. [DOI: 10.3987/com-06-s(w)30] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Coe JW, Brooks PR, Wirtz MC, Bashore CG, Bianco KE, Vetelino MG, Arnold EP, Lebel LA, Fox CB, Tingley FD, Schulz DW, Davis TI, Sands SB, Mansbach RS, Rollema H, O'Neill BT. 3,5-Bicyclic aryl piperidines: A novel class of α4β2 neuronal nicotinic receptor partial agonists for smoking cessation. Bioorg Med Chem Lett 2005; 15:4889-97. [PMID: 16171993 DOI: 10.1016/j.bmcl.2005.08.035] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2005] [Revised: 08/05/2005] [Accepted: 08/09/2005] [Indexed: 11/28/2022]
Abstract
3,5-Bicyclic aryl piperidines are a new class of high-affinity alpha4beta2 nicotinic receptor agents. We have sought nicotinic receptor partial agonists of the alpha4beta2 nicotinic acetylcholine receptor for smoking cessation, and a number of compounds fulfill potency, selectivity, and efficacy requirements in vitro. In vivo, selected agents demonstrate potent partial agonist efficacy on the mesolimbic dopamine system, a key measure of therapeutic potential for smoking cessation.
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Affiliation(s)
- Jotham W Coe
- Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, CT 06340, USA.
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38
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Abstract
Ligand-gated ion channels, or ionotropic receptors, constitute a group of membrane-bound proteins that regulate the flux of ions across the cell membrane. In the brain, ligand-gated ion channels mediate fast neurotransmission. They are crucial for normal brain function and involved in many diseases in the brain. Historically, natural products have been used extensively in biomedical studies and ultimately as drugs or leads for drug design. In studies of ligand-gated ion channels, natural products have been essential for the understanding of their structure and function. In the following a short survey of natural products and their use in studies of ligand-gated ion channels is given.
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Affiliation(s)
- Kristian Strømgaard
- Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, DK-2100 Copenhagen, Denmark.
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39
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Stead D, O'Brien P, Sanderson AJ. Concise Synthesis of (±)-Cytisine via Lithiation of N-Boc-bispidine. Org Lett 2005; 7:4459-62. [PMID: 16178558 DOI: 10.1021/ol0516869] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] (+/-)-Cytisine has been synthesized in 19% overall yield via a six-step approach from commercially available materials. Key features of this new strategy are as follows: (i) initial construction of the bispidine core, (ii) lithiation-transmetalation-allylation of an N-Boc-bispidine, and (iii) a Pd/C-mediated dihydropyridone oxidation-N-debenzylation process.
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Affiliation(s)
- Darren Stead
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
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40
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Larsen US, Martiny L, Begtrup M. Synthesis of 4-substituted tetrahydropyridines by cross-coupling of enol phosphates. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.03.203] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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41
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Coe JW, Vetelino MG, Bashore CG, Wirtz MC, Brooks PR, Arnold EP, Lebel LA, Fox CB, Sands SB, Davis TI, Schulz DW, Rollema H, Tingley FD, O'Neill BT. In pursuit of α4β2 nicotinic receptor partial agonists for smoking cessation: Carbon analogs of (−)-cytisine. Bioorg Med Chem Lett 2005; 15:2974-9. [PMID: 15908213 DOI: 10.1016/j.bmcl.2005.04.036] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2005] [Revised: 04/22/2005] [Accepted: 04/22/2005] [Indexed: 12/01/2022]
Abstract
The preparation and biological activity of analogs of (-)-cytisine, an alpha4beta2 nicotinic receptor partial agonist, are discussed. All-carbon-containing phenyl ring replacements of the pyridone ring system, generated via Heck cyclization protocols, exhibited weaker affinity and lower efficacy partial agonist profiles relative to (-)-cytisine. In vivo, selected compounds exhibit lower efficacy partial agonist profiles than that of (-)-cytisine.
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Affiliation(s)
- Jotham W Coe
- Pfizer Global Research and Development, Groton Laboratories, Eastern Point Road, Groton, CT 06340, USA.
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Mousset D, Gillaizeau I, Hassan J, Lepifre F, Bouyssou P, Coudert G. Reactivity of bis-vinylphosphates obtained from imide derivatives. Synthesis of 2,6-disubstituted 1,4-dihydropyridines. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.03.136] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43
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Ferrali A, Guarna A, Lo Galbo F, Occhiato EG. A lactam-derived vinyl boronate as a stable and crystalline reagent for the synthesis of 2-substituted piperidines by Pd-catalyzed coupling reactions. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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44
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Easton LP, Dake GR. Nucleophilic additions of lactam-derived enol triflates to aldehydes mediated by nickel(II) and chromium(II) salts. CAN J CHEM 2004. [DOI: 10.1139/v03-164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Enol trifluoromethanesulfonates (triflates) derived from N-protected lactams undergo nickel(II)-chloride- and chromium(II)-chloride-promoted carbonyl additions to aldehydes. The yields of this process range from 42%84%.Key words: nickel(II) chloride, chromium(II) chloride, carbonyl addition, lactam-derived enol triflate.
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45
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Abstract
The synthesis of racemic cytisine has been completed using (i)N-selective alkylation of 6-bromopyridone with bromide and (ii) Pd(0) mediated intramolecular alpha-arylation of lactam as key steps to achieve rapid assembly of the tricyclic core skeleton of the lupin alkaloids.
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Affiliation(s)
- Candice Botuha
- School of Chemistry, University of Bristol, Bristol, UKBS8 1TS
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46
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Weintraub PM, Sabol JS, Kane JM, Borcherding DR. Recent advances in the synthesis of piperidones and piperidines. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00295-3] [Citation(s) in RCA: 320] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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Boido CC, Tasso B, Boido V, Sparatore F. Cytisine derivatives as ligands for neuronal nicotine receptors and with various pharmacological activities. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 2003; 58:265-77. [PMID: 12620422 DOI: 10.1016/s0014-827x(03)00017-x] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Neuronal nicotinic acetylcholine receptors (nAChRs) form a family of ACh-gated cation channels made up of different subtypes. They are widely distributed in peripheral and central nervous systems and are involved in complex cerebral processes as learning, memory, nociception, movement, etc. The possibility that subtype-selective ligands be used in the treatment of CNS disorders promoted the synthesis of a large number of structural analogues of nicotine and epibatidine, two very potent nAChR agonists. Pursuing our long standing research on the structural modification of quinolizidine alkaloids, we devoted our attention to cytisine, another very potent ligand for many nAChR subtypes. Thus a systematic structural modification of cytisine was undertaken in order to obtain compounds of potential therapeutic interest at peripheral as well as central level, with a particular concern for achieving nAChR subtype selective ligands. Up to the present more than 80 cytisine derivatives, mainly of N-substitution and a few by modifying the pyridone ring, have been prepared. The biological results, which concern so far about an half of the prepared compounds, indicate that the introduction of a nitro group in position 3 of the pyridone nucleus further enhances the high affinity of cytisine, while the introduction of substituents on the basic nitrogen, though reducing in different degrees the affinity, gives rise to compounds with a higher selectivity for central (alpha(4)beta(2)) versus gangliar (alpha(3)-containing) receptor subtype. On the other hand, the analgesic, antihypertensive and inotropic activities found in some N-substituted cytisines, represent an attractive starting point for the development of more active compounds.
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Affiliation(s)
- Caterina Canu Boido
- Dipartimento di Scienze Farmaceutiche, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy
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48
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Construction of functionalized/substituted bipyridines by means of Negishi cross-coupling reactions. Formal synthesis of (±)-cytisine. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01664-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Imming P, Klaperski P, Stubbs MT, Seitz G, Gündisch D. Syntheses and evaluation of halogenated cytisine derivatives and of bioisosteric thiocytisine as potent and selective nAChR ligands. Eur J Med Chem 2001; 36:375-88. [PMID: 11461763 DOI: 10.1016/s0223-5234(01)01222-3] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We have developed one-step syntheses of halogenated derivatives of (-)-cytisine featuring a halogen substituent at positions 3, 5 or 3 and 5 of the 2-pyridone fragment, and prepared the novel bioisosteric thiocytisine by oxygen-sulphur exchange. The affinities of these pyridone-modified analogs of (-)-cytisine for (alpha 4)(2)(beta 2)(3) and alpha 7* nAChRs in rat forebrain membranes were determined by competition with (+/-)-[(3)H]epibatidine and [(3)H]MLA, respectively. The 3-halocytisines 7 possess subnanomolar affinities for (alpha 4)(2)(beta 2)(3) nAChRs, higher than those found for (-)-cytisine as well as for the 5-halocytisines 8 and 3,5-dihalocytisines 6. In contrast to the parent alkaloid the 3-halogenated species display much a higher affinity for the alpha 7* nAChR subtype. The most potent molecule was 3-bromocytisine (7b) with preferential selectivity (200-fold) for the (alpha 4)(2)(beta 2)(3) subtype [K(i)=10 pM (alpha 4 beta 2) and 2.0 nM (alpha 7*)]. Replacement of the lactam with a thiolactam pharmacophore to thiocytisine (12) resulted in a subnanomolar affinity for the (alpha 4)(2)(beta 2)(3) nAChR subtype (K(i)=0.832 nM), but in a drastic decrease of affinity for the alpha 7* subtype; thiocytisine (12) has a K(i) value of 4000 nM (alpha 7*), giving a selectivity of 4800-fold for the neuronal (alpha 4)(2)(beta 2)(3)-nAChR and thus displaying the best affinity-selectivity profile in the series under consideration.
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Affiliation(s)
- P Imming
- Department of Pharmaceutical Chemistry, Philipps-University, Marbacher Weg 6, D-35032 Marburg, Germany
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