1
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Jiang B, Dai M. Concise Total Syntheses of the 6-7-5 Hamigeran Natural Products. J Am Chem Soc 2023; 145:18731-18736. [PMID: 37603855 PMCID: PMC10472436 DOI: 10.1021/jacs.3c06031] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Indexed: 08/23/2023]
Abstract
Herein, we report the total syntheses of four hamigeran natural products featuring a 6-7-5 tricyclic carbon skeleton. We utilized a palladium-catalyzed intramolecular cyclopropanol ring opening cross-coupling to build the central seven-membered ring and a series of oxidations including a challenging aromatic C-H oxidation to introduce the peripheral functionalities. This approach enabled us to achieve the first total syntheses of hamigeran C (14 steps), debromohamigeran I (12 steps), and hamigeran I (13 steps). Our synthesis also resulted in hamigeran G in 13 steps, which is significantly shorter than the previously reported one (24 steps, longest linear sequence).
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Affiliation(s)
- Baiyang Jiang
- Department
of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
| | - Mingji Dai
- Department
of Chemistry and Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Department of Pharmacology and Chemical Biology, Emory University, Atlanta, Georgia 30322, United States
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2
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Larcombe CN, Malins LR. Accessing Diverse Cross-Benzoin and α-Siloxy Ketone Products via Acyl Substitution Chemistry. J Org Chem 2022; 87:9408-9413. [PMID: 35758296 DOI: 10.1021/acs.joc.2c00801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An approach to diverse cross-benzoin and α-siloxy ketone products which leverages a simple yet underutilized C-C bond disconnection strategy is reported. Acyl substitution of readily accessible α-siloxy Weinreb amides with organolithium compounds enables access to a broad scope of aryl, heteroaryl, alkyl, alkenyl, and alkynyl derivatives. Enantiopure benzoins can be accessed via a chiral pool approach, and the utility of accessible cross-benzoins and α-siloxy ketones is highlighted in a suite of downstream synthetic applications.
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Affiliation(s)
- Chloe N Larcombe
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Lara R Malins
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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3
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Zhu Y, Huang HY, He YQ, Wang M, Wang XY, Song XR, Mao ZJ, Tian WF, Xiao Q. Visible-light enabled photochemical reduction of 1,2-dicarbonyl compounds by Hünig's base. Org Chem Front 2022. [DOI: 10.1039/d1qo01841h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light enabled, chemoselective photoreduction of 1,2-dicarbonyl compounds by using Hünig's base as reductant is reported.
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Affiliation(s)
- Yao Zhu
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Hai-Yang Huang
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Yong-Qin He
- School of Pharmaceutical Science, Nanchang University, Nanchang, 330006, P. R. China
| | - Mei Wang
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Xiao-Yu Wang
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Xian-Rong Song
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Zhi-Jie Mao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Wan-Fa Tian
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
| | - Qiang Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal University, Nanchang, 330013, P. R. China
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4
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Li S, Wang S, Li J, Qi Y, Wang C, Zong L, Tan CH. Monocationic Cinchoninium Catalyzed Asymmetric Oxohydroxylation of Enoates. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Shuangqing Li
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Shuangshuang Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Juan Li
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yue Qi
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chao Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Lili Zong
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
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5
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Tandem Olefin Metathesis/α-Ketohydroxylation Revisited. Catalysts 2021. [DOI: 10.3390/catal11060719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
EWG-activated and polar quaternary ammonium salt-tagged ruthenium metathesis catalysts have been applied in a two-step one-pot metathesis-oxidation process leading to functionalized α-hydroxyketones (acyloins). In this assisted tandem process, the metathesis catalyst is used first to promote ring-closing metathesis (RCM) and cross-metathesis (CM) steps, then upon the action of Oxone™ converts into an oxidation catalyst able to transform the newly formed olefinic product into acyloin under mild conditions.
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6
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Microbial Synthesis of ( S)- and ( R)-Benzoin in Enantioselective Desymmetrization and Deracemization Catalyzed by Aureobasidium pullulans Included in the Blossom Protect™ Agent. Molecules 2021; 26:molecules26061578. [PMID: 33809372 PMCID: PMC8001866 DOI: 10.3390/molecules26061578] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/08/2021] [Accepted: 03/10/2021] [Indexed: 11/27/2022] Open
Abstract
In this study, we examined the Aureobasidium pullulans strains DSM 14940 and DSM 14941 included in the Blossom Protect™ agent to be used in the bioreduction reaction of a symmetrical dicarbonyl compound. Both chiral 2-hydroxy-1,2-diphenylethanone antipodes were obtained with a high enantiomeric purity. Mild conditions (phosphate buffer [pH 7.0, 7.2], 30 °C) were successfully employed in the synthesis of (S)-benzoin using two different methodologies: benzyl desymmetrization and rac-benzoin deracemization. Bioreduction carried out with higher reagent concentrations, lower pH values and prolonged reaction time, and in the presence of additives, enabled enrichment of the reaction mixture with (R)-benzoin. The described procedure is a potentially useful tool in the synthesis of chiral building blocks with a defined configuration in a simple and economical process with a lower environmental impact, enabling one-pot biotransformation.
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7
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Toledano-Pinedo M, Martínez del Campo T, Tiemblo M, Fernández I, Almendros P. Organoseleno-Catalyzed Synthesis of α,β-Unsaturated α′-Alkoxy Ketones from Allenes Enabled by Se···O Interactions. Org Lett 2020; 22:3979-3984. [DOI: 10.1021/acs.orglett.0c01288] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Mireia Toledano-Pinedo
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Quı́mica Orgánica, Unidad Asociada al CSIC, Facultad de Quı́mica, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Teresa Martínez del Campo
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Quı́mica Orgánica, Unidad Asociada al CSIC, Facultad de Quı́mica, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Marta Tiemblo
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Quı́mica Orgánica, Unidad Asociada al CSIC, Facultad de Quı́mica, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Israel Fernández
- Departamento de Quı́mica Orgánica and Centro de Innovación en Quı́mica Avanzada (ORFEO−CINQA), Facultad de Quı́mica, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pedro Almendros
- Instituto de Quı́mica Orgánica General, IQOG, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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8
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Patil BN, Lade JJ, Parab AA, Sathe PA, Vadagaonkar KS, Chaskar AC. NBS-assisted an efficient conversion of styrenes to α-hydroxy ketones in water. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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9
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Di Carmine G, Bortolini O, Massi A, Müller M, Bernacchia G, Fantin G, Ragno D, Giovannini PP. Enzymatic Cross‐Benzoin‐Type Condensation of Aliphatic Aldehydes: Enantioselective Synthesis of 1‐Alkyl‐1‐hydroxypropan‐2‐ones and 1‐Alkyl‐1‐hydroxybutan‐2‐ones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Graziano Di Carmine
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Olga Bortolini
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Michael Müller
- Institute of Pharmaceutical SciencesAlbert-Ludwigs-Universität Freiburg Albertstrasse 25 79104 Freiburg Germany
| | - Giovanni Bernacchia
- Dipartimento di Scienze della Vita e BiotecnologieUniversità di Ferrara Via L. Borsari 46 44121 Ferrara Italy
| | - Giancarlo Fantin
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Daniele Ragno
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Pier Paolo Giovannini
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
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10
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Nowicka E, Hickey NW, Sankar M, Jenkins RL, Knight DW, Willock DJ, Hutchings GJ, Francisco M, Taylor SH. Mechanistic Insights into Selective Oxidation of Polyaromatic Compounds using RICO Chemistry. Chemistry 2018; 24:12359-12369. [PMID: 29790204 DOI: 10.1002/chem.201800423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Indexed: 11/07/2022]
Abstract
Ruthenium-ion-catalyzed oxidation (RICO) of polyaromatic hydrocarbons (PAHs) has been studied in detail using experimental and computational approaches to explore the reaction mechanism. DFT calculations show that regioselectivity in these reactions can be understood in terms of the preservation of aromaticity in the initial formation of a [3+2] metallocycle intermediate at the most-isolated double bond. We identify two competing pathways: C-C bond cleavage leading to a dialdehyde and C-H activation followed by H migration to the RuOx complex to give diketones. Experimentally, the oxidation of pyrene and phenanthrene has been carried out in monophasic and biphasic solvent systems. Our results show that diketones are the major product for both phenanthrene and pyrene substrates. These diketone products are shown to be stable under our reaction conditions so that higher oxidation products (acids and their derivatives) are assigned to the competing pathway through the dialdehyde. Experiments using 18 O-labelled water do show incorporation of oxygen from the solvents into products, but this may take place during the formation of the reactive RuO4 species rather than directly during PAH oxidation. When the oxidation of pyrene is carried out using D2 O, a kinetic isotope effect (KIE) is observed implying that water is involved in the rate-determining step leading to the diketone products.
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Affiliation(s)
- Ewa Nowicka
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, 10623, Berlin, Germany.,Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Niamh W Hickey
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Meenakshisundaram Sankar
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Robert L Jenkins
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - David W Knight
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - David J Willock
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Graham J Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Manuel Francisco
- ExxonMobil, Research & Engineering Company, 1545 Route 22 East, Annandale, New Jersey, 08801, USA
| | - Stuart H Taylor
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
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11
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Affiliation(s)
- Mina C. Nakhla
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - John L. Wood
- Department of Chemistry and
Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
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12
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Mecozzi F, Dong JJ, Saisaha P, Browne WR. Oxidation of Vicinal Diols to α-Hydroxy Ketones with H 2O 2 and a Simple Manganese Catalyst. European J Org Chem 2017; 2017:6919-6925. [PMID: 29398954 PMCID: PMC5767754 DOI: 10.1002/ejoc.201701314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Indexed: 11/07/2022]
Abstract
α-Hydroxy ketones are valuable synthons in organic chemistry. Here we show that oxidation of vic-diols to α-hydroxy ketones with H2O2 can be achieved with an in situ prepared catalyst based on manganese salts and pyridine-2-carboxylic acid. Furthermore the same catalyst is effective in alkene epoxidation, and it is shown that alkene oxidation with the MnII catalyst and H2O2 followed by Lewis acid ring opening of the epoxide and subsequent oxidation of the alkene to α-hydroxy ketones can be achieved under mild (ambient) conditions.
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Affiliation(s)
- Francesco Mecozzi
- Molecular Inorganic Chemistry Stratingh Institute for Chemistry Faculty of Mathematics and Natural Sciences Nijenborgh 49747 AG Groningen The Netherlands
| | - Jia Jia Dong
- Molecular Inorganic Chemistry Stratingh Institute for Chemistry Faculty of Mathematics and Natural Sciences Nijenborgh 49747 AG Groningen The Netherlands
| | - Pattama Saisaha
- Molecular Inorganic Chemistry Stratingh Institute for Chemistry Faculty of Mathematics and Natural Sciences Nijenborgh 49747 AG Groningen The Netherlands
| | - Wesley R Browne
- Molecular Inorganic Chemistry Stratingh Institute for Chemistry Faculty of Mathematics and Natural Sciences Nijenborgh 49747 AG Groningen The Netherlands
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13
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Bag R, De PB, Pradhan S, Punniyamurthy T. Recent Advances in Radical Dioxygenation of Olefins. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700512] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Raghunath Bag
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati India
| | - Pinaki Bhusan De
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati India
| | - Sourav Pradhan
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati India
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14
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Hong AY, Vanderwal CD. A Sequential Cycloaddition Strategy for the Synthesis of Alsmaphorazine B Traces a Path Through a Family of Alstonia Alkaloids. Tetrahedron 2017; 73:4160-4171. [PMID: 28943664 PMCID: PMC5603193 DOI: 10.1016/j.tet.2016.11.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Driven by a new biogenetic hypothesis, the first total synthesis of alsmaphorazine B and several related indole alkaloids has been achieved. Numerous early approaches proved unsuccessful owing to unproductive side reactivity; nevertheless, they provided important clues that guided the evolution of our strategy. Critical to our success was a major improvement in our Zincke aldehyde cycloaddition strategy, which permitted the efficient gram-scale synthesis of akuammicine. The sequential chemoselective oxidations of akuammicine leading up to the key oxidative rearrangement also yielded several biogenetically related indole alkaloids en route to alsmaphorazine B.
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Affiliation(s)
- Allen Y. Hong
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, USA
| | - Christopher D. Vanderwal
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, USA
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15
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Vila C, Quintero L, Blay G, Muñoz MC, Pedro JR. Organocatalytic Enantioselective Synthesis of α-Hydroxyketones through a Friedel–Crafts Reaction of Naphthols and Activated Phenols with Aryl- and Alkylglyoxal Hydrates. Org Lett 2016; 18:5652-5655. [DOI: 10.1021/acs.orglett.6b02893] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carlos Vila
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, Burjassot, E-46100 València, Spain
| | - Lucia Quintero
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, Burjassot, E-46100 València, Spain
| | - Gonzalo Blay
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, Burjassot, E-46100 València, Spain
| | - M. Carmen Muñoz
- Departament de Física Aplicada, Universitat Politècnica de València, C/Camí de Vera, s/n, E-46022 València, Spain
| | - José R. Pedro
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, Burjassot, E-46100 València, Spain
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16
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Giovannini PP, Lerin LA, Müller M, Bernacchia G, Bastiani MD, Catani M, Di Carmine G, Massi A. (S
)-Selectivity in Phenylacetyl Carbinol Synthesis Using the Wild-Type Enzyme Acetoin:Dichlorophenolindophenol Oxidoreductase from Bacillus licheniformis. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pier Paolo Giovannini
- Dipartimento di Scienze Chimiche e Farmaceutiche; Università di Ferrara; Via Fossato di Mortara 17 I-44121 Ferrara Italy
| | - Lindomar Alberto Lerin
- Dipartimento di Scienze Chimiche e Farmaceutiche; Università di Ferrara; Via Fossato di Mortara 17 I-44121 Ferrara Italy
| | - Michael Müller
- Institute of Pharmaceutical Sciences; Albert-Ludwigs-Universität Freiburg; Albertstrasse 25 79104 Freiburg Germany
| | - Giovanni Bernacchia
- Dipartimento di Scienze della Vita e Biotecnologie; Università di Ferrara; Via L. Borsari 46 I-44121 Ferrara Italy
| | - Morena De Bastiani
- Dipartimento di Scienze della Vita e Biotecnologie; Università di Ferrara; Via L. Borsari 46 I-44121 Ferrara Italy
| | - Martina Catani
- Dipartimento di Scienze Chimiche e Farmaceutiche; Università di Ferrara; Via Fossato di Mortara 17 I-44121 Ferrara Italy
| | - Graziano Di Carmine
- Dipartimento di Scienze Chimiche e Farmaceutiche; Università di Ferrara; Via Fossato di Mortara 17 I-44121 Ferrara Italy
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche e Farmaceutiche; Università di Ferrara; Via Fossato di Mortara 17 I-44121 Ferrara Italy
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17
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Acid-catalyzed C–O coupling of styrenes with N-hydroxyphthalimide: trapping alkenyl radicals by TEMPO. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.04.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Lv Y, Wang X, Cui H, Sun K, Pu W, Li G, Wu Y, He J, Ren X. Selectfluor-mediated highly selective radical dioxygenation of alkenes. RSC Adv 2016. [DOI: 10.1039/c6ra16266e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Selectfluor mediated highly selective radical dioxygenation of alkenes using hydroxylamines and O2 was achieved under mild conditions.
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Affiliation(s)
- Yunhe Lv
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Xin Wang
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Hao Cui
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Kai Sun
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Weiya Pu
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Gang Li
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Yingtao Wu
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Jialin He
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
| | - Xiaoran Ren
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang
- China
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19
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Xia XF, Zhu SL, Zhang D. Copper-catalyzed C–O coupling of styrenes with N-hydroxyphthalimide through dihydroxylamination reactions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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20
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Xia XF, Zhu SL, Gu Z, Wang H, Li W, Liu X, Liang YM. Catalyst-Controlled Dioxygenation of Olefins: An Approach to Peroxides, Alcohols, and Ketones. J Org Chem 2015; 80:5572-80. [DOI: 10.1021/acs.joc.5b00460] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiao-Feng Xia
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Su-Li Zhu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Zhen Gu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Haijun Wang
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wei Li
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Xiang Liu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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21
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Nowicka E, Sankar M, Jenkins RL, Knight DW, Willock DJ, Hutchings GJ, Francisco M, Taylor SH. Selective Oxidation of Alkyl-Substituted Polyaromatics Using Ruthenium-Ion-Catalyzed Oxidation. Chemistry 2015; 21:4285-93. [DOI: 10.1002/chem.201405831] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Indexed: 11/11/2022]
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22
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Pal M, Srivastava G, Sharma AN, Kaur S, Jolly RS. Biocatalyzed asymmetric reduction of benzils to either benzoins or hydrobenzoins: pH dependent switch. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00158g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different enzyme activities present in a whole-cell biocatalyst have been selectively harnessed to asymmetrically reduce bulky–bulky 1,2-diketones to either 2-hydroxyketones or 1,2-diols.
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Affiliation(s)
- Mohan Pal
- Department of Chemistry
- CSIR-Institute of Microbial Technology
- Chandigarh 160 036
- India
| | - Gautam Srivastava
- Department of Chemistry
- CSIR-Institute of Microbial Technology
- Chandigarh 160 036
- India
| | - Amar Nath Sharma
- Department of Chemistry
- CSIR-Institute of Microbial Technology
- Chandigarh 160 036
- India
| | - Suneet Kaur
- Department of Chemistry
- CSIR-Institute of Microbial Technology
- Chandigarh 160 036
- India
| | - Ravinder S. Jolly
- Department of Chemistry
- CSIR-Institute of Microbial Technology
- Chandigarh 160 036
- India
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23
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Agudo R, Roiban GD, Lonsdale R, Ilie A, Reetz MT. Biocatalytic route to chiral acyloins: P450-catalyzed regio- and enantioselective α-hydroxylation of ketones. J Org Chem 2014; 80:950-6. [PMID: 25495724 DOI: 10.1021/jo502397s] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
P450-BM3 and mutants of this monooxygenase generated by directed evolution are excellent catalysts for the oxidative α-hydroxylation of ketones with formation of chiral acyloins with high regioselectivity (up to 99%) and enantioselectivity (up to 99% ee). This constitutes a new route to a class of chiral compounds that are useful intermediates in the synthesis of many kinds of biologically active compounds.
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Affiliation(s)
- Rubén Agudo
- Department of Chemistry, Philipps-Universität Marburg , Hans-Meerwein Strasse, 35032 Marburg, Germany
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24
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Reddi RN, Prasad PK, Sudalai A. I2-Catalyzed Regioselective Oxo- and Hydroxy-acyloxylation of Alkenes and Enol Ethers: A Facile Access to α-Acyloxyketones, Esters, and Diol Derivatives. Org Lett 2014; 16:5674-7. [DOI: 10.1021/ol5027393] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Rambabu N. Reddi
- Chemical
Engineering and
Process Development Division, National Chemical Laboratory, Pashan Road, Pune, 411008, India
| | - Pragati K. Prasad
- Chemical
Engineering and
Process Development Division, National Chemical Laboratory, Pashan Road, Pune, 411008, India
| | - Arumugam Sudalai
- Chemical
Engineering and
Process Development Division, National Chemical Laboratory, Pashan Road, Pune, 411008, India
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25
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Igawa K, Kawasaki Y, Nishino K, Mitsuda N, Tomooka K. Asymmetric Ozone Oxidation of Silylalkenes Using aC2-Symmetrical Dialkoxysilyl Group as a Chiral Auxiliary. Chemistry 2014; 20:9255-8. [DOI: 10.1002/chem.201402996] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Indexed: 11/07/2022]
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26
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Piccialli V. Ruthenium tetroxide and perruthenate chemistry. Recent advances and related transformations mediated by other transition metal oxo-species. Molecules 2014; 19:6534-82. [PMID: 24853716 PMCID: PMC6270930 DOI: 10.3390/molecules19056534] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 05/14/2014] [Accepted: 05/16/2014] [Indexed: 11/16/2022] Open
Abstract
In the last years ruthenium tetroxide is increasingly being used in organic synthesis. Thanks to the fine tuning of the reaction conditions, including pH control of the medium and the use of a wider range of co-oxidants, this species has proven to be a reagent able to catalyse useful synthetic transformations which are either a valuable alternative to established methods or even, in some cases, the method of choice. Protocols for oxidation of hydrocarbons, oxidative cleavage of C-C double bonds, even stopping the process at the aldehyde stage, oxidative cleavage of terminal and internal alkynes, oxidation of alcohols to carboxylic acids, dihydroxylation of alkenes, oxidative degradation of phenyl and other heteroaromatic nuclei, oxidative cyclization of dienes, have now reached a good level of improvement and are more and more included into complex synthetic sequences. The perruthenate ion is a ruthenium (VII) oxo-species. Since its introduction in the mid-eighties, tetrapropylammonium perruthenate (TPAP) has reached a great popularity among organic chemists and it is mostly employed in catalytic amounts in conjunction with N-methylmorpholine N-oxide (NMO) for the mild oxidation of primary and secondary alcohols to carbonyl compounds. Its use in the oxidation of other functionalities is known and recently, its utility in new synthetic transformations has been demonstrated. New processes, synthetic applications, theoretical studies and unusual transformations, published in the last eight years (2006-2013), in the chemistry of these two oxo-species, will be covered in this review with the aim of offering a clear picture of their reactivity. When appropriate, related oxidative transformations mediated by other metal oxo-species will be presented to highlight similarities and differences. An historical overview of some aspects of the ruthenium tetroxide chemistry will be presented as well.
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Affiliation(s)
- Vincenzo Piccialli
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli "Federico II", Via Cintia 4, 80126, Napoli, Italy.
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27
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Tranchimand S, Faure B, Naubron JV, Alphand V, Archelas A, Iacazio G. Silica-Catalysed and Highly Stereoselective Convergent and Nonconvergent Rearrangements of Menthone Enol Acetate Epoxides: Easy Access to the Four α-Hydroxymenthone Stereoisomers. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200414] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Schmidt VA, Alexanian EJ. Metal-free, aerobic ketooxygenation of alkenes using hydroxamic acids. Chem Sci 2012. [DOI: 10.1039/c2sc01042a] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Zhao M, Kuang CX, Cheng XZ, Yang Q. Iron-catalyzed ketonization of 2-aryl-1,1-dibromoalkenes with KOAc: Synthesis of α-acetoxy aryl ketones via a Michael-like addition process. CHINESE CHEM LETT 2011. [DOI: 10.1016/j.cclet.2010.11.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Kuhl N, Glorius F. Direct and efficient N-heterocyclic carbene-catalyzed hydroxymethylation of aldehydes. Chem Commun (Camb) 2010; 47:573-5. [PMID: 21038072 DOI: 10.1039/c0cc02416c] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The N-heterocyclic carbene-catalyzed coupling of several aldehydes with paraformaldehyde is reported, directly providing the corresponding valuable hydroxymethyl ketones. Results of first mechanistic experiments for this remarkably selective transformation are also provided.
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Affiliation(s)
- Nadine Kuhl
- Organisch-Chemisches Institut der Westfälischen Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
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31
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Hoyos P, Sinisterra JV, Molinari F, Alcántara AR, Domínguez de María P. Biocatalytic strategies for the asymmetric synthesis of alpha-hydroxy ketones. Acc Chem Res 2010; 43:288-99. [PMID: 19908854 DOI: 10.1021/ar900196n] [Citation(s) in RCA: 170] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of efficient syntheses for enantiomerically enriched alpha-hydroxy ketones is an important research focus in the pharmaceutical industry. For example, alpha-hydroxy ketones are found in antidepressants, in selective inhibitors of amyloid-beta protein production (used in the treatment of Alzheimer's), in farnesyl transferase inhibitors (Kurasoin A and B), and in antitumor antibiotics (Olivomycin A and Chromomycin A3). Moreover, alpha-hydroxy ketones are of particular value as fine chemicals because of their utility as building blocks for the production of larger molecules. They can also be used in preparing many other important structures, such as amino alcohols, diols, and so forth. Several purely chemical synthetic approaches have been proposed to afford these compounds, together with some organocatalytic strategies (thiazolium-based carboligations, proline alpha-hydroxylations, and so forth). However, many of these chemical approaches are not straightforward, lack selectivity, or are economically unattractive because of the large number of chemical steps required (usually combined with low enantioselectivities). In this Account, we describe three different biocatalytic approaches that have been developed to efficiently produce alpha-hydroxy ketones: (i) The use of thiamine diphosphate-dependent lyases (ThDP-lyases) to catalyze the umpolung carboligation of aldehydes. Enantiopure alpha-hydroxy ketones are formed from inexpensive aldehydes with this method. Some lyases with a broad substrate spectrum have been successfully characterized. Furthermore, the use of biphasic media with recombinant whole cells overexpressing lyases leads to productivities of approximately 80-100 g/L with high enantiomeric excesses (up to >99%). (ii) The use of hydrolases to produce alpha-hydroxy ketones by means of (in situ) dynamic kinetic resolutions (DKRs). Lipases are able to successfully resolve racemates, and many outstanding examples have been reported. However, this approach leads to a maximum theoretical yield of 50%. As a means of overcoming this problem, these traditional lipase-catalyzed kinetic resolutions are combined with racemization of remnant substrate, which can be done in situ or in separate compartments. Examples showing high conversions (>90%) and enantiomeric excesses (>99%) are described. (iii) Whole-cell redox processes, catalyzed by several microorganisms, either by means of free enzymes (applying a cofactor regeneration system) or by whole cells. Through the use of redox machineries, different strategies can lead to high yields and enantiomeric excesses. Some enantiopure alpha-hydroxy ketones can be formed by reductions of diketones and by selective oxidations of vicinal diols. Likewise, some redox processes involving sugar chemistry (involving alpha-hydroxy ketones) have been developed on the industrial scale. Finally, the redox whole-cell concept allows racemizations (and deracemizations) as well. These three strategies provide a useful and environmentally friendly synthetic toolbox. Likewise, the field represents an illustrative example of how biocatalysis can assist practical synthetic processes, and how problems derived from the integration of natural tools in synthetic pathways can be efficiently tackled to afford high yields and enantioselectivities.
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Affiliation(s)
- Pilar Hoyos
- Grupo de Biotransformaciones, Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza de Ramón y Cajal, s/n. 28040 Madrid, Spain
| | - Josep-Vicent Sinisterra
- Grupo de Biotransformaciones, Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza de Ramón y Cajal, s/n. 28040 Madrid, Spain
- Unidad de Biotransformaciones Industriales, Parque Científico de Madrid, PTM, C/ Santiago Grisolía, 2, 28760 Tres Cantos, Madrid, Spain
| | - Francesco Molinari
- Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università degli Studi di Milano, 20133 Milano, Italy
| | - Andrés R. Alcántara
- Grupo de Biotransformaciones, Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense de Madrid, Plaza de Ramón y Cajal, s/n. 28040 Madrid, Spain
- Unidad de Biotransformaciones Industriales, Parque Científico de Madrid, PTM, C/ Santiago Grisolía, 2, 28760 Tres Cantos, Madrid, Spain
| | - Pablo Domínguez de María
- Institute of Technical and Macromolecular Chemistry (ITMC), RWTH Aachen University, Worringerweg 1, D-52074 Aachen, Germany
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32
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Alcaide B, Almendros P, Luna A. Grubbs' ruthenium-carbenes beyond the metathesis reaction: less conventional non-metathetic utility. Chem Rev 2009; 109:3817-58. [PMID: 19572654 DOI: 10.1021/cr9001512] [Citation(s) in RCA: 285] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benito Alcaide
- Departamento de Química Orgánica I, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain.
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33
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Cheng J, Fang Z, Li S, Zheng B, Jiang Y. An efficient synthesis of d-mannoheptulose via oxidation of an olefinated sugar with potassium permanganate in aqueous acetone. Carbohydr Res 2009; 344:2093-5. [DOI: 10.1016/j.carres.2009.06.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 06/08/2009] [Accepted: 06/22/2009] [Indexed: 11/26/2022]
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34
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Vaismaa MJP, Leskinen MV, Lajunen MK. Microwave-Assisted One-Carbon Chain Extension in the Preparation of Terminal α-Hydroxy Ketones. SYNTHETIC COMMUN 2009. [DOI: 10.1080/00397910802632589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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35
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Takikawa H, Takada A, Hikita K, Suzuki K. Formation of alpha-hydroxy-beta-diketones through hydroxylation of isoxazolium salts: stereoselective approach to angular cis-diols in polycyclic systems. Angew Chem Int Ed Engl 2008; 47:7446-9. [PMID: 18712721 DOI: 10.1002/anie.200801586] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hiroshi Takikawa
- Department of Chemistry, Tokyo Institute of Technology, SORST-JST Agency, 2-12-1 O-okayama, Meguro-ku, Tokyo, Japan
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36
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Takikawa H, Takada A, Hikita K, Suzuki K. Formation of α-Hydroxy-β-diketones through Hydroxylation of Isoxazolium Salts: Stereoselective Approach to Angularcis-Diols in Polycyclic Systems. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801586] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Niggemann M, Jelonek A, Biber N, Wuchrer M, Plietker B. A General, Iterative, and Modular Approach toward Carbohydrate Libraries Based on Ruthenium-Catalyzed Oxidative Cyclizations. J Org Chem 2008; 73:7028-36. [DOI: 10.1021/jo801528n] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Meike Niggemann
- Institüt für Organische Chemie, Fakultät Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Andreas Jelonek
- Institüt für Organische Chemie, Fakultät Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Nicole Biber
- Institüt für Organische Chemie, Fakultät Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Margarita Wuchrer
- Institüt für Organische Chemie, Fakultät Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Bernd Plietker
- Institüt für Organische Chemie, Fakultät Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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38
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39
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Leitão AJ, Salvador JA, Pinto RM, Sá e Melo ML. Hydrazine sulphate: a cheap and efficient catalyst for the regioselective ring-opening of epoxides. A metal-free procedure for the preparation of β-alkoxy alcohols. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.12.121] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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40
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41
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Kraft P, Bruneau A. Ring Reversal of a Spirocyclic Patchouli Odorant: Molecular Modeling, Synthesis, and Odor of 6-Hydroxy-1,1,6-trimethylspiro[4.5]decan-7-one. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600815] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Ferraz HMC, Longo LS. Bicyclic β-Hydroxytetrahydrofurans as Precursors of Medium Ring Keto-Lactones. J Org Chem 2007; 72:2945-50. [PMID: 17362043 DOI: 10.1021/jo0626109] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of a series of cis-fused bicyclic beta-hydroxytetrahydrofurans with ruthenium tetraoxide, generated in situ from ruthenium trichloride and sodium periodate, afforded 9- and 10-membered keto-lactones in moderate to good yields, in a clean and straightforward fashion. The starting beta-hydroxyethers were obtained from the corresponding 3-alkenols by two alternative procedures, depending on their pattern of substitution: (a) epoxidation by dimethyldioxirane, followed by base-catalyzed cyclization of the resulting epoxyalcohol, and (b) thallium trinitrate-mediated cyclization of the 3-alkenols, a method already described by our group.
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Affiliation(s)
- Helena M C Ferraz
- Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05513-970, São Paulo, SP, Brazil.
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43
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Göhler S, Stark CBW. Catalytic diastereo- and positionselective oxidative mono-cyclization of 1,5,9-trienes and polyenes. Org Biomol Chem 2007; 5:1605-14. [PMID: 17571191 DOI: 10.1039/b702877f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ruthenium tetroxide (1 mol%) has been used as a catalyst for the oxidative mono-cyclization of 1,5,9-trienes and polyenes. The poly-unsaturated substrates underwent mono-cyclization with a high degree of diastereo- and positionselectivity to produce mono-tetrahydrofuran diols with a varying degree of unsaturation. Up to four new stereogenic centers were created in this single step transformation. The remarkable positionselectivity appears to be a result of relative electronic properties of the double bonds within the polyolefinic substrates in conjunction with conformational constraints.
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Affiliation(s)
- Sabrina Göhler
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, 14195, Berlin, Germany
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44
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Roth S, Stark CBW. Efficient Oxidative Cyclization of 1,6-Dienes: A Highly Diastereoselective Entry to Substituted Tetrahydropyrans. Angew Chem Int Ed Engl 2006; 45:6218-21. [PMID: 16862628 DOI: 10.1002/anie.200504572] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Stefanie Roth
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
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45
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Roth S, Stark CBW. Effiziente oxidative Cyclisierung von 1,6-Dienen: ein hoch diastereoselektiver Zugang zu Tetrahydropyranen. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200504572] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Scholte AA, An MH, Snapper ML. Ruthenium-Catalyzed Tandem Olefin Metathesis−Oxidations. Org Lett 2006; 8:4759-62. [PMID: 17020296 DOI: 10.1021/ol061837n] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The utility of Grubbs' 2nd generation metathesis catalyst has been expanded by the development of two tandem olefin metathesis/oxidation protocols. These ruthenium-catalyzed processes provide cis-diols or alpha-hydroxy ketones from simple olefinic starting materials.
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Affiliation(s)
- Andrew A Scholte
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467-3860, USA
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47
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Muñiz K, Hövelmann CH, Villar A, Vicente R, Streuff J, Nieger M. 2-Amino ketones from osmium-catalysed oxidations of alkenes. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2006.02.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Bonini C, Chiummiento L, Funicello M, Lupattelli P, Pullez M. New Functionalised Hydroxymethyl Ketones from the Mild and Chemoselective KMnO4 Oxidation of Chiral Terminal Olefins. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500737] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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New oxidative pathways for the synthesis of α-hydroxy ketones—the α-hydroxylation and ketohydroxylation. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.08.057] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Villar A, Hövelmann CH, Nieger M, Muñiz K. First osmium-catalysed ketamination of alkenes. Chem Commun (Camb) 2005:3304-6. [PMID: 15983655 DOI: 10.1039/b505278p] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conditions for a first oxidative conversion of alkenes into 2-amino ketones are described, which yield racemic products within a direct oxidation pathway and 2-amino ketones with up to 99% enantiomeric excess from the corresponding enantiopure amino alcohols.
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Affiliation(s)
- Amparo Villar
- Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
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