1
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Mazeh S, Garcia-Fernandez MD, Pelletier B, Moreau C, Delair P. Total synthesis of the natural (-)-205B alkaloid and its activity toward α7 nAChRs. Org Biomol Chem 2023; 21:817-822. [PMID: 36601968 PMCID: PMC9972826 DOI: 10.1039/d2ob01723g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A new approach to the synthesis of the (-)-205B alkaloid is described in this paper. This work is characterised by the development of an efficient chirality transfer through a silyl tethered intramolecular alkylation reaction, an unprecedented tandem highly selective iridium catalyzed partial reduction of lactam coupled with an acid promoted aza-Prins reaction, and an almost complete stereochemical control in Shenvi's radical hydrogen atom transfer on an exocyclic methylene. The second part of this work demonstrates the positive allosteric behavior of this natural alkaloid toward α7 nAChRs, in contrast to the reported inhibitory effect of the unnatural enantiomer.
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Affiliation(s)
- Sara Mazeh
- Départment de Pharmacochimie Moléculaire, Univ. Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5063, F-38041, Grenoble, France.
| | | | | | | | - Philippe Delair
- Départment de Pharmacochimie Moléculaire, Univ. Grenoble Alpes, ICMG FR-2607, CNRS, UMR-5063, F-38041, Grenoble, France.
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2
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Wang SQ, Qi WY, Yin XS, Shi BF. Formal total synthesis of (±)-7-deoxycylindrospermopsin and its 8- epi isomer. Org Chem Front 2021. [DOI: 10.1039/d1qo00381j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A concise formal synthesis of (±)-7-deoxycylindrospermopsin in 14 steps was reported.
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Affiliation(s)
- Si-Qing Wang
- Center of Chemistry for Frontier Technologies
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Wei-Yi Qi
- Center of Chemistry for Frontier Technologies
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Xue-Song Yin
- Center of Chemistry for Frontier Technologies
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Bing-Feng Shi
- Center of Chemistry for Frontier Technologies
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
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3
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Stojanović M, Bugarski S, Baranac-Stojanović M. Synthesis of 2,3-Dihydro-4-pyridones and 4-Pyridones by the Cyclization Reaction of Ester-Tethered Enaminones. J Org Chem 2020; 85:13495-13507. [PMID: 33092340 DOI: 10.1021/acs.joc.0c01537] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
2,3-Dihydro-4-pyridone skeleton is an important building block in organic synthesis because it features several reaction sites with nucleophilic or electrophilic properties. Herein, we disclose a method for its formation by intramolecular cyclization of ester-tethered enaminones, which can easily be synthesized from readily available materials, such as amines, activated alkynes, and activated alkenes. 2,3-Dihydro-4-pyridones have been isolated in 41-90% yields. We also demonstrate the transformation of these heterocycles into another important class of compounds, 4-pyridones, by utilizing 2,3,5,6-tetrachloro-p-benzoquinone (chloranil) as an oxidizing agent. The latter products were isolated in 65-94% yields.
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Affiliation(s)
- Milovan Stojanović
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy-Center for Chemistry, Njegoševa 12, P.O. Box 473, 11000 Belgrade, Serbia
| | - Slobodan Bugarski
- University of Belgrade-Faculty of Chemistry, Studentski trg 12-16, P.O. Box 158, 11000 Belgrade, Serbia
| | - Marija Baranac-Stojanović
- University of Belgrade-Faculty of Chemistry, Studentski trg 12-16, P.O. Box 158, 11000 Belgrade, Serbia
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4
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Bartolo ND, Read JA, Valentín EM, Woerpel KA. Reactions of Allylmagnesium Reagents with Carbonyl Compounds and Compounds with C═N Double Bonds: Their Diastereoselectivities Generally Cannot Be Analyzed Using the Felkin-Anh and Chelation-Control Models. Chem Rev 2020; 120:1513-1619. [PMID: 31904936 PMCID: PMC7018623 DOI: 10.1021/acs.chemrev.9b00414] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This review describes the additions of allylmagnesium reagents to carbonyl compounds and to imines, focusing on the differences in reactivity between allylmagnesium halides and other Grignard reagents. In many cases, allylmagnesium reagents either react with low stereoselectivity when other Grignard reagents react with high selectivity, or allylmagnesium reagents react with the opposite stereoselectivity. This review collects hundreds of examples, discusses the origins of stereoselectivities or the lack of stereoselectivity, and evaluates why selectivity may not occur and when it will likely occur.
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Affiliation(s)
- Nicole D. Bartolo
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
| | - Jacquelyne A. Read
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
- Department of Chemistry, University of Utah, 315 South 1400
East, Salt Lake City, UT 84112, USA
| | - Elizabeth M. Valentín
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
- Department of Chemistry, Susquehanna University, 514
University Avenue, Selinsgrove, PA 17870, USA
| | - K. A. Woerpel
- Department of Chemistry, New York University, 100
Washington Square East, New York, NY 10003, USA
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5
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Lahosa A, Yus M, Foubelo F. Enantiodivergent Approach to the Synthesis of Cis-2,6-Disubstituted Piperidin-4-ones. J Org Chem 2019; 84:7331-7341. [PMID: 31063684 DOI: 10.1021/acs.joc.9b01008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Enantiopure β-amino ketone derivatives were synthesized by decarboxylative Mannich reaction of chiral N- tert-butanesulfinyl imines with β-keto acids and were subsequently transformed into cis-2,6-disubstituted piperidin-4-ones through an organocatalyzed condensation with aldehydes. Both enantiomers were accessible from the same precursors by inverting the order in the reaction sequence of the aldehydes involved in the imine formation and the intramolecular Mannich condensation. The synthesis of the piperidine alkaloids (+)-241D, (-)-epimyrtine, and (-)-lasubine II demonstrated the utility of this methodology.
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Affiliation(s)
- Alejandro Lahosa
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Instituto de Síntesis Orgánica (ISO) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain
| | - Francisco Foubelo
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Instituto de Síntesis Orgánica (ISO) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA) , Universidad de Alicante , Apdo. 99 , 03080 Alicante , Spain
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6
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St Hilaire VR, Hopkins WE, Miller YS, Dandepally SR, Williams AL. Regioselective addition of Grignard reagents to N-acylpyrazinium salts: synthesis of substituted 1,2-dihydropyrazines and Δ 5-2-oxopiperazines. Beilstein J Org Chem 2019; 15:72-78. [PMID: 30680041 PMCID: PMC6334805 DOI: 10.3762/bjoc.15.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 12/10/2018] [Indexed: 11/23/2022] Open
Abstract
The regioselective addition of Grignard reagents to mono- and disubstituted N-acylpyrazinium salts affording substituted 1,2-dihydropyrazines in modest to excellent yields (45–100%) is described. Under acidic conditions, these 1,2-dihydropyrazines can be converted to substituted Δ5-2-oxopiperazines providing a simple and efficient approach towards their preparation.
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Affiliation(s)
- Valentine R St Hilaire
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina 27707, United States
| | - William E Hopkins
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina 27707, United States
| | - Yenteeo S Miller
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina 27707, United States
| | - Srinivasa R Dandepally
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina 27707, United States
| | - Alfred L Williams
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina 27707, United States.,Department of Pharmaceutical Sciences, North Carolina Central University, Durham, North Carolina 27707, United States
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7
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Affiliation(s)
- Shinji Yamada
- Department of Chemistry, Faculty of Science, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
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8
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Obydennov DL, El-Tantawy AI, Sosnovskikh VY. Synthesis of Multifunctionalized 2,3-Dihydro-4-pyridones and 4-Pyridones via the Reaction of Carbamoylated Enaminones with Aldehydes. J Org Chem 2018; 83:13776-13786. [PMID: 30336022 DOI: 10.1021/acs.joc.8b02075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The novel and effective diastereoselective synthesis of multifunctionalized dihydropyridones, including CF3-substituted derivatives, has been developed on the basis of the piperidine-promoted domino reaction of carbamoylated enaminones with aldehydes. The products have been prepared in 38-90% yields and can be easily isolated by crystallization. Tautomerism, epimerization, and atropisomerism of dihydropyridones have been studied. The use of the resulting dihydropyridones in the synthesis of 1,2,6-trisubstituted 4-pyridone-3-carboxamides has been demonstrated via oxidative aromatization initiated by iodine.
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Affiliation(s)
- Dmitrii L Obydennov
- Institute of Natural Sciences and Mathematics , Ural Federal University , 620000 Ekaterinburg , Russian Federation
| | - Asmaa I El-Tantawy
- Institute of Natural Sciences and Mathematics , Ural Federal University , 620000 Ekaterinburg , Russian Federation.,Department of Physics and Engineering Mathematics, Faculty of Electronic Engineering , Menoufia University , 32952 Menouf , Egypt
| | - Vyacheslav Y Sosnovskikh
- Institute of Natural Sciences and Mathematics , Ural Federal University , 620000 Ekaterinburg , Russian Federation
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9
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Flexible access to 2,3,5,6-tetrasubstituted dehydropiperidines by Ni- or Co-catalyzed site-selective cross-coupling using Vilsmeier-Haack-derived α-chloro-β-formyltetrahydropyridines. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Sowmiah S, Esperança JMSS, Rebelo LPN, Afonso CAM. Pyridinium salts: from synthesis to reactivity and applications. Org Chem Front 2018. [DOI: 10.1039/c7qo00836h] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review highlights the pyridinium salts in terms of their natural occurrence, synthesis, reactivity, biological properties, and diverse applications.
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Affiliation(s)
- Subbiah Sowmiah
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- Research Institute for Medicines (iMed.ULisboa)
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- LAQV-REQUIMTE
| | - Luís P. N. Rebelo
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- LAQV-REQUIMTE
| | - Carlos A. M. Afonso
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-009 Lisboa
- Portugal
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11
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Hao HD, Trauner D. Furans as Versatile Synthons: Total Syntheses of Caribenol A and Caribenol B. J Am Chem Soc 2017; 139:4117-4122. [DOI: 10.1021/jacs.7b00234] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hong-Dong Hao
- Department of Chemistry and Center for
Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 München, Germany
| | - Dirk Trauner
- Department of Chemistry and Center for
Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandtstrasse
5-13, 81377 München, Germany
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12
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Kandepedu N, Abrunhosa-Thomas I, Troin Y. Stereoselective strategies for the construction of polysubstituted piperidinic compounds and their applications in natural products’ synthesis. Org Chem Front 2017. [DOI: 10.1039/c7qo00262a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An abridged and far-reaching review communication on the construction of the polysubstituted piperidinic core using diverse methodologies for the benefit of organic chemists interested in the total synthesis of biologically active compounds.
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Affiliation(s)
- Nishanth Kandepedu
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Isabelle Abrunhosa-Thomas
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - Yves Troin
- Université Clermont Auvergne
- SIGMA Clermont
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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13
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2014. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Affiliation(s)
- Hui Li
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
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15
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Enamorado MF, Connelly CM, Deiters A, Comins DL. A concise synthesis of the Lycopodium alkaloid cermizine D. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Abstract
Described herein is a short total synthesis of alkaloid (-)-205B (1) by means of an anti-selective SN2' alkylation of an attractively functionalized cyclopropanol and diastereoselective cyclization of the resulting aminoallene adduct for bicyclic ring formation. The synthesis features a general route to cis- or trans-2,6-disubstituted piperidines by lithium aluminum hydride reduction of the imine intermediate by an appropriate choice of solvent and cis- or trans-2,5-disubstituted pyrrolidines by an exceptional level of chirality transfer from a pendant allene. Particularly noteworthy are the brevity and convergence made possible by a segment-coupling strategy.
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Affiliation(s)
- Nagavaram Narsimha Rao
- Department of Chemistry, Wayne State University , 5101 Cass Avenue, Detroit, Michigan 48202, United States
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17
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Kamath A, Fabritius CH, Philouze C, Delair P. A new approach to the 8b-azaacenaphthylene ring system. Org Biomol Chem 2015; 13:9834-43. [DOI: 10.1039/c5ob01013f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach to the 8b-azaacenaphthylene ring system is described featuring several stereoselective transformations.
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Affiliation(s)
- Anushree Kamath
- SERCO
- Département de Chimie Moléculaire
- Univ. Grenoble Alpes
- ICMG FR-2607
- CNRS
| | | | - Christian Philouze
- MUST
- Département de Chimie Moléculaire
- Univ. Grenoble Alpes
- ICMG FR-2607
- CNRS
| | - Philippe Delair
- SERCO
- Département de Chimie Moléculaire
- Univ. Grenoble Alpes
- ICMG FR-2607
- CNRS
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