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Rodríguez‐López J, Brovetto M, Martín VS, Martín T. Enantiodivergent Cyclization by Inversion of the Reactivity in Ambiphilic Molecules. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Julio Rodríguez‐López
- Instituto Universitario de Bio-Orgánica Antonio González Universidad de La Laguna Francisco Sánchez 2 38206 La Laguna Tenerife Spain
| | - Margarita Brovetto
- Instituto Universitario de Bio-Orgánica Antonio González Universidad de La Laguna Francisco Sánchez 2 38206 La Laguna Tenerife Spain
| | - Víctor S. Martín
- Instituto Universitario de Bio-Orgánica Antonio González Universidad de La Laguna Francisco Sánchez 2 38206 La Laguna Tenerife Spain
- Departamento de Química Orgánica Universidad de La Laguna Francisco Sánchez s/n. Facultad de Farmacia 38200 La Laguna Tenerife Spain
| | - Tomás Martín
- Instituto Universitario de Bio-Orgánica Antonio González Universidad de La Laguna Francisco Sánchez 2 38206 La Laguna Tenerife Spain
- Instituto de Productos Naturales y Agrobiología CSIC Francisco Sánchez 3 38206 La Laguna Tenerife Spain
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2
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Rodríguez-López J, Brovetto M, Martín VS, Martín T. Enantiodivergent Cyclization by Inversion of the Reactivity in Ambiphilic Molecules. Angew Chem Int Ed Engl 2020; 59:17077-17083. [PMID: 32573884 DOI: 10.1002/anie.202006650] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Indexed: 02/01/2023]
Abstract
Inverting the reactivity of the functional groups in ambiphilic molecules provides a new synthetic strategy to perform late-stage enantiodivergence. Both enantiomers of the final compound can be obtained from a common chiral precursor. As a proof of concept, the synthesis of substituted five- and six-membered oxacycles is described. The key step is the cyclization of an ambiphilic linear precursor bearing a propargylic alcohol and an epoxide linked through an alkyl chain. Through a slight modification of these linear precursors and employing different reaction conditions, these functional groups can inverse their chemical reactivity, producing one enantiomer or another of the final product. This enantiodivergent cyclization involves three stereogenic centers that can undergo fully controlled retention or inversion of their configuration depending on the cyclization pathway that is activated. The cyclization provides late-stage enantiodivergence, enabling the synthesis of either enantiomers of the oxacycles from a common chiral substrate with total transfer of the enantiomeric purity.
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Affiliation(s)
- Julio Rodríguez-López
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
| | - Margarita Brovetto
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
| | - Víctor S Martín
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain.,Departamento de Química Orgánica, Universidad de La Laguna, Francisco Sánchez s/n. Facultad de Farmacia, 38200, La Laguna, Tenerife, Spain
| | - Tomás Martín
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain.,Instituto de Productos Naturales y Agrobiología, CSIC, Francisco Sánchez 3, 38206, La Laguna, Tenerife, Spain
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3
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Kaczmarek R, Korczyński D, Green JR, Dembinski R. Extension of the 5-alkynyluridine side chain via C-C-bond formation in modified organometallic nucleosides using the Nicholas reaction. Beilstein J Org Chem 2020; 16:1-8. [PMID: 31976010 PMCID: PMC6964655 DOI: 10.3762/bjoc.16.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/14/2019] [Indexed: 01/15/2023] Open
Abstract
Dicobalt hexacarbonyl nucleoside complexes of propargyl ether or esters of 5-substituted uridines react with diverse C-nucleophiles. Synthetic outcomes confirmed that the Nicholas reaction can be carried out in a nucleoside presence, leading to a divergent synthesis of novel metallo-nucleosides enriched with alkene, arene, arylketo, and heterocyclic functions, in the deoxy and ribo series.
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Affiliation(s)
- Renata Kaczmarek
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Dariusz Korczyński
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - James R Green
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, N9B 3P4, Canada
| | - Roman Dembinski
- Department of Bioorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
- Department of Chemistry, Oakland University, 146 Library Drive, Rochester, Michigan 48309-4479, USA
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4
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Miranda S, Gómez AM, López JC. Diversity-Oriented Synthetic Endeavors of Newly Designed Ferrier and Ferrier-Nicholas Systems Derived from 1-C-Alkynyl-2-deoxy-2-C-Methylene Pyranosides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Silvia Miranda
- Bioorganic Chemistry Department; Instituto Quimica Organica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
| | - Ana M. Gómez
- Bioorganic Chemistry Department; Instituto Quimica Organica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
| | - J. Cristóbal López
- Bioorganic Chemistry Department; Instituto Quimica Organica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
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5
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Tsou PK, Lee YC, Lankau T, Isobe M, Yu CH. Substituent effects in the Nicholas epimerization of glycosides. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3780] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Pei-Kang Tsou
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
| | - Yen-Chun Lee
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
| | - Timm Lankau
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
| | - Minoru Isobe
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
| | - Chin-Hui Yu
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
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6
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Miranda S, Lobo F, Gomez AM, Lopez JC. Ferrier-Nicholas Cations from C-3-Alkynylglycals: Access to C-3-Branched Allylic Glycosides and Ring-Opening Derivatives. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Silvia Miranda
- Department of Bio-Organic Chemistry; Instituto de Química Orgánica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
| | - Fernando Lobo
- Department of Bio-Organic Chemistry; Instituto de Química Orgánica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
| | - Ana M. Gomez
- Department of Bio-Organic Chemistry; Instituto de Química Orgánica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
| | - J. Cristobal Lopez
- Department of Bio-Organic Chemistry; Instituto de Química Orgánica General (IQOG-CSIC); Juan de la Cierva 3 28006 Madrid Spain
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7
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Alkynyldicobalt Derivatives of Dibenzosuberenol and Dibenzocyclooctatrien‐5‐ol: Ring Conformations, Ease of Carbonyl Elimination and Relevance to Pauson–Khand Cyclization. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601538] [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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8
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Tatina MB, Hussain A, Dhas AK, Mukherjee D. Advances in C-alkynylation of sugars and its application in organic synthesis. RSC Adv 2016. [DOI: 10.1039/c6ra11672h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
C-Glycosidation plays a significant role in the synthesis of optically active scaffolds.
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Affiliation(s)
- Madhu Babu Tatina
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi, India
- Indian Institute of Integrative Medicine (CSIR-IIIM)
- , India
| | - Altaf Hussain
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi, India
- Indian Institute of Integrative Medicine (CSIR-IIIM)
- , India
| | | | - Debaraj Mukherjee
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi, India
- Indian Institute of Integrative Medicine (CSIR-IIIM)
- , India
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9
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Adachi M. Total Synthesis of Polygalolide A by Intramolecular C-Glycosylation. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masaatsu Adachi
- Graduate School of Bioagricultural Sciences, Nagoya University
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10
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Diastereoselective cobalt-assisted Ferrier-type rearrangement to construct chiral alkynyl cyclohexanones. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.09.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Tatina MB, Kusunuru AK, Yousuf SK, Mukherjee D. Zinc mediated activation of terminal alkynes: stereoselective synthesis of alkynyl glycosides. Org Biomol Chem 2014; 12:7900-3. [DOI: 10.1039/c4ob01405g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc mediated alkynylation reaction was studied for the preparation of C-glycosides from unactivated aromatic and aliphatic acetylenes. Different glycosyl donors such as glycals and anomeric acetates were tested towards in situ generated alkynyl zinc reagent using zinc dust and ethyl bromoacetate. The method provides a simple, mild and stereoselective access of alkynyl glycosides.
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Affiliation(s)
- Madhu Babu Tatina
- Academy of Scientific and Innovative Research
- CSIR-IIIM
- India
- Indian Institute of Integrative Medicine
- Jammu, India
| | - Anil Kumar Kusunuru
- Academy of Scientific and Innovative Research
- CSIR-IIIM
- India
- Indian Institute of Integrative Medicine
- Jammu, India
| | | | - Debaraj Mukherjee
- Academy of Scientific and Innovative Research
- CSIR-IIIM
- India
- Indian Institute of Integrative Medicine
- Jammu, India
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12
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Yamada H, Adachi M, Isobe M, Nishikawa T. Stereocontrolled total synthesis of polygalolide A. Chem Asian J 2013; 8:1428-35. [PMID: 23670825 DOI: 10.1002/asia.201300362] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Indexed: 11/05/2022]
Abstract
The total synthesis of polygalolide A, a secondary metabolite that was isolated from a Chinese medicinal plant, is reported. A key issue in this synthesis was construction of an oxabicyclo[3.2.1] skeleton, which was solved by the development of an intramolecular Ferrier-type C-glycosylation of a glucal with siloxyfuran as an internal nucleophile. The substrate was prepared from D-glucal by the introduction of trimethylsilylacetylene and siloxyfuran groups. Although C-glycosylation did not occur under the conditions found from model experiments, further examination revealed that the combination of trimethylsilyl trifluoromethanesulfonate (TMSOTf) and 2,4,6-collidine successfully afforded the desired product as a single diastereomer. The siloxy group at the C3 position played a crucial role in the stereocontrol of this reaction. The product was further transformed into a tetracyclic compound as follows: The vinyl ether and acetylenic moieties were reduced and the siloxy group was removed with a Barton-McCombie reaction. The construction of the six-membered ether and the γ-lactone provided the tetracyclic compound. Finally, a phenolic moiety was introduced by using a Mukaiyama aldol reaction to furnish polygalolide A.
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Affiliation(s)
- Hitomi Yamada
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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13
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Melikyan GG, Rivas B, Harutyunyan S, Carlson L, Sepanian R. Cobaltocene-Induced Low-Temperature Radical Coupling Reactions in a Cobalt–Alkyne Series. Organometallics 2012. [DOI: 10.1021/om2006497] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gagik G. Melikyan
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Bianca Rivas
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Stepan Harutyunyan
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Louis Carlson
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
| | - Ruth Sepanian
- Department of Chemistry
and Biochemistry, California State University Northridge, Northridge, California 91330-8262, United
States
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14
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Affiliation(s)
- Masaatsu Adachi
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan, and Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hitomi Yamada
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan, and Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Minoru Isobe
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan, and Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Toshio Nishikawa
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan, and Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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15
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Ayed C, Palmier S, Lubin-Germain N, Uziel J, Augé J. Indium-mediated alkynylation of sugars: synthesis of C-glycosyl compounds bearing a protected amino alcohol moiety. Carbohydr Res 2010; 345:2566-70. [DOI: 10.1016/j.carres.2010.07.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 07/19/2010] [Accepted: 07/21/2010] [Indexed: 10/19/2022]
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16
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Vieira AS, Fiorante PF, Hough TLS, Ferreira FP, Lüdtke DS, Stefani HA. Nucleophilic Addition of Potassium Alkynyltrifluoroborates to d-Glucal Mediated by BF3·OEt2: Highly Stereoselective Synthesis of α-C-glycosides. Org Lett 2008; 10:5215-8. [DOI: 10.1021/ol8022177] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adriano S. Vieira
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Pedro F. Fiorante
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Thomas L. S. Hough
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Fernando P. Ferreira
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Diogo S. Lüdtke
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
| | - Hélio A. Stefani
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 São Paulo, Brazil, and Departamento de Biofísica, Universidade Federal de São Paulo, SP, Brazil
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Olier C, Gastaldi S, Gil G, Bertrand MP. Protected propargylic acetals. Nicholas–Prins cyclization leading to functionalized 2-alkynyl-tetrahydropyrans. Intramolecular trapping by allenes. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Lubin-Germain N, Hallonet A, Huguenot F, Palmier S, Uziel J, Augé J. Ferrier-Type Alkynylation Reaction Mediated by Indium. Org Lett 2007; 9:3679-82. [PMID: 17672476 DOI: 10.1021/ol701480x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient Ferrier-type alkynylation reaction between glycals and iodoalkynes using Barbier conditions is described. These conditions require In0, InI, or InII and lead to alpha-2,3-unsaturated-C-glycosides with good stereoselectivity. When glycosyliodoalkynes are used, trehalose-derived compounds and alpha-(1-->6)-C-disaccharides are obtained.
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Affiliation(s)
- Nadège Lubin-Germain
- Laboratoire de Synthèse Organique Sélective et Chimie Organométallique, UMR 8123 CNRS-UCP-ESCOM, Université de Cergy-Pontoise, 5 mail Gay-Lussac, 95031 Cergy-Pontoise cedex, France.
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Risseeuw MDP, Grotenbreg GM, Witte MD, Tuin AW, Leeuwenburgh MA, Van der Marel GA, Overkleeft HS, Overhand M. The Synthesis ofcis- andtrans-Fused Bicyclic Sugar Amino Acids. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600228] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Saeeng R, Isobe M. Stereoselective C-Alkynylation, Allenylation, and Prop-2-ynylation Leading to Sugar Glycosides. CHEM LETT 2006. [DOI: 10.1246/cl.2006.552] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Saeeng R, Sirion U, Sahakitpichan P, Isobe M. Iodine catalyzes C-glycosidation of d-glucal with silylacetylene. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01540-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Ogawa A, Sakagami K, Shima A, Suzuki H, Komiya S, Katano Y, Mitsunobu O. Convenient method for the preparation of 1-phenylthio-3-alken-1-ynes and 4-hydroxy-1-phenylthio-1,2-alkadienes from a common precursor. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01380-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Christie SD, Davoile RJ, Jones RC. Exploration of Nicholas methodology using chiral heterobimetallic cobalt–molybdenum propargylium complexes. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01670-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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The Nicholas reaction: the use of dicobalt hexacarbonyl-stabilised propargylic cations in synthesis. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00315-0] [Citation(s) in RCA: 254] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Approach to a new model of induction of stereoselectivity in the Nicholas reaction via a chiral 1-alkoxy-propargylium cation. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(01)01188-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Deschamps NM, Kaldis JH, Lock PE, Britten JF, McGlinchey MJ. Alkynylcyclohexanol chairs and twist-boats: Co(2)(CO)(6) as a conformational switch. J Org Chem 2001; 66:8585-91. [PMID: 11735541 DOI: 10.1021/jo0108820] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Treatment of 1-[axial]-(trimethylsilylethynyl)cyclohexan-1-ol with dicobalt octacarbonyl results in a conformational ring flip such that the bulky dicobalt-alkyne cluster moiety now occupies the favored equatorial site. However, when a 4-tert-butyl substituent is present, the coordinated alkynyl group retains its original axial or equatorial position. Complexation of trans-[diaxial]-1,4-bis(triphenylsilylethynyl)cyclohexane-1,4-diol brings about a chair-to-chair conformational inversion such that both cluster fragments now occupy equatorial sites. In contrast, cis-1,4-bis(triphenylsilylethynyl)cyclohexane-1,4-diol reacts with Co(2)(CO)(8) to yield the twist-boat conformer in which the two axial hydroxy substituents exhibit intra-molecular hydrogen bonding. Likewise, the corresponding reaction of cis-1,4-bis(trimethylsilylethynyl)cyclohexane-1,4-diol with Co(2)(CO)(8) leads to a twist-boat, but in this case, the molecules are linked through inter-molecular hydrogen bonds. Eight of these cobalt clusters have been characterized by X-ray crystallography, and the potential use of twist-boats in synthesis is discussed.
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Affiliation(s)
- N M Deschamps
- Department of Chemistry, McMaster University, Hamilton, Ontario, Canada L8S 4M1
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27
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Huang G, Isobe M. Stereoselective synthesis of sugar allenes and their hydrosilylation catalyzed by biscobaltoctacarbonyl. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)01066-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Kira K, Isobe M. Synthesis of the BCDE rings of ciguatoxin 1B via an acetylene biscobalthexacarbonyl–vinylsilane strategy. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00286-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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30
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Acetylene cobalt complex and vinylsilane strategy in the synthesis of ciguatoxin (D)EF analog. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00988-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Hydrosilylation of acetylenes with catalytic biscobalthexacarbonyl complex and its application to heteroconjugate addition methodology. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01228-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Inoue M, Sasaki M, Tachibana K. A convergent synthesis of the trans-fused hexahydrooxonine ring system and reproduction of conformational behavior shown by ring F of ciguatoxin. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00620-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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A convenient route to cis- and trans-fused bicyclic ethers by ruthenium mediated ring-closing metathesis of diene and enyne carbohydrate derivatives. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00296-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hosokawa S, Isobe M. Mirror Image Synthesis of Left Ends of Ciguatoxin and Gambiertoxin 4b. J Org Chem 1999; 64:37-48. [PMID: 11674082 DOI: 10.1021/jo980088n] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three compounds related to the AB fragments of ciguatoxin and gambiertoxin 4b and two diastereomers (at the C-2 position) of the ABC fragment of ciguatoxin have been synthesized in enantiomeric form. The stereochemistry of the C-2 position was introduced selectively from the corresponding pentose derivative. Construction of the A ring with its side chain was completed by Nicholas type cyclization of an acetylene bis(cobalthexacarbonyl) complex followed by reductive decomplexation.
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Affiliation(s)
- Seijiro Hosokawa
- Laboratory of Organic Chemistry, School of Bioagricultural Sciences, Nagoya University Chikusa, Nagoya 464-8601, Japan
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Betancort JM, Rodríguez CM, Martín VS. Use of asymmetric propargyl dicobalt hexacarbonyl complexes in organic synthesis: Access to enantiomerically pure α-hydroxy acid derivatives. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)02170-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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37
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Yenjai C, Isobe M. One-step recyclization of sugar acetylenes to form medium ether rings via dicobalthexacarbonyl complexes. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00013-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Stereoselective Synthesis of α-C-(alkynyl)-glycosides via Ring-opening of α-1,2-Anhydrosugars. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01381-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Brook MA, Ramacher B, Dallaire C, Gupta HK, Ulbrich D, Ruffolo R. Steric control in the formation of Co2(CO)6-alkyne complexes from Group 14 tetraalkynes and their reactions with acid. Inorganica Chim Acta 1996. [DOI: 10.1016/s0020-1693(96)05209-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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El Amouri H, Gruselle M. New Bonding Modes, Fluxional Behavior, and Reactivity in Dinuclear Complexes Bridged by Four-Electron Donor Unsaturated Hydrocarbons. Chem Rev 1996; 96:1077-1104. [PMID: 11848781 DOI: 10.1021/cr9500040] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hani El Amouri
- Ecole Nationale Supérieure de Chimie de Paris URA 403 CNRS, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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Jiang Y, Isobe M. Pseudoenantiomeric heteroconjugate addition approach for synthesis of spiro segment of tautomycin. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00008-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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44
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Ring opening of alkynyl sugars by Nicholas reaction—application to enantioselective synthesis of oxepane subunits of marine trans-fused polyether Toxins. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)81207-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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