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KITANOSONO T, KAWASE T, YAMASHITA Y, KOBAYASHI S. Highly enantioselective hydroxymethylation of unmodified α-substituted aryl ketones in water. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2023; 99:328-333. [PMID: 37673660 PMCID: PMC10749394 DOI: 10.2183/pjab.99.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/14/2023] [Indexed: 09/08/2023]
Abstract
Catalytic asymmetric direct-type aldol reactions of ketones with aldehydes are a perennial puzzle for organic chemists. Notwithstanding the emergence of a myriad of chiral catalysts to address the inherent reversibility of the aldol products, a general method to access acyclic α-chiral ketones from prochiral aryl ketones has remained an unmet synthetic challenge. The approach outlined herein is fundamentally different to that used in conventional catalysis, which typically commences with an α-proton abstraction by a Brønsted base. The use of a chiral 2,2'-bipyridine scandium complex enabled the hydroxymethylation of propiophenone to be run under base-free conditions, which avails effectual suppression of hydrolytic deactivation of the Lewis acid catalyst. Intriguingly, the use of water as a reaction medium had an overriding effect on the progress of the reaction. The sagacious selection of sodium dodecyl sulfate and lithium dodecyl sulfate as surfactants allowed a variety of propiophenone derivatives to react in a highly enantioselective manner.
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Affiliation(s)
- Taku KITANOSONO
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Tomoya KAWASE
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yasuhiro YAMASHITA
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Shū KOBAYASHI
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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2
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Sai M. Potassium Base-Promoted Diastereoselective Synthesis of 1,3-Diols from Allylic Alcohols and Aldehydes through a Tandem Allylic-Isomerization/Aldol-Tishchenko Reaction. Chem Asian J 2021; 16:4053-4056. [PMID: 34651444 DOI: 10.1002/asia.202101093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/14/2021] [Indexed: 01/07/2023]
Abstract
This study reports the first base-promoted aldol-Tishchenko reactions of allylic alcohols with aldehydes initiated by allylic isomerization. The reaction enables the diastereoselective synthesis of a variety of 1,3-diols with three contiguous stereogenic centers. Unlike commonly reported systems, our method allows the use of readily available allylic alcohols as nucleophiles instead of enolizable aldehydes and ketones.
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Affiliation(s)
- Masahiro Sai
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.,Research Foundation ITSUU Laboratory, C1232 Kanagawa Science Park R & D Building, 3-2-1 Sakado Takatsu-ku, Kawasaki, Kanagawa, 213-0012, Japan
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3
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Alabugin IV, Kuhn L, Medvedev MG, Krivoshchapov NV, Vil' VA, Yaremenko IA, Mehaffy P, Yarie M, Terent'ev AO, Zolfigol MA. Stereoelectronic power of oxygen in control of chemical reactivity: the anomeric effect is not alone. Chem Soc Rev 2021; 50:10253-10345. [PMID: 34263287 DOI: 10.1039/d1cs00386k] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Although carbon is the central element of organic chemistry, oxygen is the central element of stereoelectronic control in organic chemistry. Generally, a molecule with a C-O bond has both a strong donor (a lone pair) and a strong acceptor (e.g., a σ*C-O orbital), a combination that provides opportunities to influence chemical transformations at both ends of the electron demand spectrum. Oxygen is a stereoelectronic chameleon that adapts to the varying situations in radical, cationic, anionic, and metal-mediated transformations. Arguably, the most historically important stereoelectronic effect is the anomeric effect (AE), i.e., the axial preference of acceptor groups at the anomeric position of sugars. Although AE is generally attributed to hyperconjugative interactions of σ-acceptors with a lone pair at oxygen (negative hyperconjugation), recent literature reports suggested alternative explanations. In this context, it is timely to evaluate the fundamental connections between the AE and a broad variety of O-functional groups. Such connections illustrate the general role of hyperconjugation with oxygen lone pairs in reactivity. Lessons from the AE can be used as the conceptual framework for organizing disjointed observations into a logical body of knowledge. In contrast, neglect of hyperconjugation can be deeply misleading as it removes the stereoelectronic cornerstone on which, as we show in this review, the chemistry of organic oxygen functionalities is largely based. As negative hyperconjugation releases the "underutilized" stereoelectronic power of unshared electrons (the lone pairs) for the stabilization of a developing positive charge, the role of orbital interactions increases when the electronic demand is high and molecules distort from their equilibrium geometries. From this perspective, hyperconjugative anomeric interactions play a unique role in guiding reaction design. In this manuscript, we discuss the reactivity of organic O-functionalities, outline variations in the possible hyperconjugative patterns, and showcase the vast implications of AE for the structure and reactivity. On our journey through a variety of O-containing organic functional groups, from textbook to exotic, we will illustrate how this knowledge can predict chemical reactivity and unlock new useful synthetic transformations.
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Affiliation(s)
- Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow, 119991, Russian Federation
| | - Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Patricia Mehaffy
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Meysam Yarie
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65167, Iran
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Mohammad Ali Zolfigol
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65167, Iran
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4
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Ismiyarto, Kishi N, Adachi Y, Jiang R, Doi T, Zhou DY, Asano K, Obora Y, Suzuki T, Sasai H, Suzuki T. Catalytic enantioselective intramolecular Tishchenko reaction of meso-dialdehyde: synthesis of ( S)-cedarmycins. RSC Adv 2021; 11:11606-11609. [PMID: 35423664 PMCID: PMC8695919 DOI: 10.1039/d1ra00915j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/11/2021] [Indexed: 12/02/2022] Open
Abstract
The first successful example of a catalytic enantioselective intramolecular Tishchenko reaction of a meso-dialdehyde in the presence of a chiral iridium complex is described. Chiral lactones were obtained in good yields with up to 91% ee. The obtained enantioenriched lactones were utilized for the first synthesis of (S)-cedarmycins A and B.
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Affiliation(s)
- Ismiyarto
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Nobuki Kishi
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials, and Bioengineering, Kansai University Suita Osaka 564-8680 Japan
| | - Yuki Adachi
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Rui Jiang
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Takahiro Doi
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Da-Yang Zhou
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Kaori Asano
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Yasushi Obora
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials, and Bioengineering, Kansai University Suita Osaka 564-8680 Japan
| | - Takayoshi Suzuki
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
| | - Takeyuki Suzuki
- The Institute of Scientific and Industrial Research, Osaka University Mihogaoka, Ibaraki Osaka 567-0047 Japan
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5
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Oishi M, Yoshimura R, Nomura N. Dinuclear Pentacoordinated Organoyttrium Biphenolates as Initiators for the Synthesis of High-Molecular Weight Isotactic Poly(2-vinylpyridine). Inorg Chem 2019; 58:13755-13760. [DOI: 10.1021/acs.inorgchem.9b02385] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masataka Oishi
- School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Reiji Yoshimura
- Laboratory of Polymer Chemistry, Graduate School of Bioagricultural Sciences, E1-1(300), Nagoya University, Nagoya 464-8601, Japan
| | - Nobuyoshi Nomura
- Laboratory of Polymer Chemistry, Graduate School of Bioagricultural Sciences, E1-1(300), Nagoya University, Nagoya 464-8601, Japan
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6
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Asano T, Kotani S, Nakajima M. Stereoselective Synthesis of 2-Fluoro-1,3-Diols via Lithium Binaphtholate-Catalyzed Aldol-Tishchenko Reaction. Org Lett 2019; 21:4192-4196. [PMID: 31120256 DOI: 10.1021/acs.orglett.9b01371] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Lithium binaphtholate, readily prepared from ( R)-3,3'-I2-BINOL and lithium tert-butoxide, efficaciously catalyzed the enantioselective aldol-Tishchenko tandem reaction of α-fluoroketones with aldehydes, achieving the enantioselective synthesis of 2-fluoro-1,3-diols with three contiguous stereogenic centers. Kinetic studies revealed that the aldol reaction and the subsequent hemiacetal formation are in equilibrium under the reaction conditions and that the lithium binaphtholate catalyst selectively promotes hydride shift of one of the eight stereoisomers to produce 2-fluoro-1,3-diols containing a tetrasubstituted fluorinated carbon center.
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Affiliation(s)
- Toshifumi Asano
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi, Chuo-ku , Kumamoto 862-0973 , Japan
| | - Shunsuke Kotani
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi, Chuo-ku , Kumamoto 862-0973 , Japan
| | - Makoto Nakajima
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi, Chuo-ku , Kumamoto 862-0973 , Japan
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7
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Yamashita Y, Yasukawa T, Yoo WJ, Kitanosono T, Kobayashi S. Catalytic enantioselective aldol reactions. Chem Soc Rev 2018; 47:4388-4480. [DOI: 10.1039/c7cs00824d] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent developments in catalytic asymmetric aldol reactions have been summarized.
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Affiliation(s)
- Yasuhiro Yamashita
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Tomohiro Yasukawa
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Woo-Jin Yoo
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Taku Kitanosono
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Shū Kobayashi
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
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8
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Robinson JR, Qiao Y, Gu J, Carroll PJ, Walsh PJ, Schelter EJ. The role of dynamic ligand exchange in the oxidation chemistry of cerium(iii). Chem Sci 2016; 7:4537-4547. [PMID: 30155100 PMCID: PMC6016327 DOI: 10.1039/c5sc04897d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/22/2016] [Indexed: 01/09/2023] Open
Abstract
We report the exchange processes and reactivity of 1-Ce(het), which establish the effects of ligand redistribution and ligand reorganization in CeIII oxidation chemistry.
The CeIII/IV couple is useful for many applications in organic, inorganic, and materials chemistry. However, attaining a general method to access both oxidations states through reversible solution redox chemistry remains challenging. Herein we report the synthesis, characterization, and oxidation chemistry of the novel Ce/Li REMB heterochiral diastereomer, 1-Ce(het). The solution exchange processes of 1-RE(het) (RE = Ce and Yb) were investigated to estimate rates of ligand and cation exchange relevant in homochiral and heterochiral frameworks. A detailed mechanistic investigation following the solution dynamics of 1-Ce(het) revealed reactivity controlled both by ligand reorganization and redistribution processes. Ligand reorganization was responsible for the kinetics associated with the chemical oxidation reaction, whereas ligand redistribution and exchange dictated the isolated products.
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Affiliation(s)
- Jerome R Robinson
- P. Roy and Diana T. Vagelos Laboratories , Department of Chemistry , University of Pennsylvania , Philadelphia , PA 19104 , USA . ;
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories , Department of Chemistry , University of Pennsylvania , Philadelphia , PA 19104 , USA . ;
| | - Jun Gu
- P. Roy and Diana T. Vagelos Laboratories , Department of Chemistry , University of Pennsylvania , Philadelphia , PA 19104 , USA . ;
| | - Patrick J Carroll
- P. Roy and Diana T. Vagelos Laboratories , Department of Chemistry , University of Pennsylvania , Philadelphia , PA 19104 , USA . ;
| | - Patrick J Walsh
- P. Roy and Diana T. Vagelos Laboratories , Department of Chemistry , University of Pennsylvania , Philadelphia , PA 19104 , USA . ;
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories , Department of Chemistry , University of Pennsylvania , Philadelphia , PA 19104 , USA . ;
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9
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Levin JR, Cheisson T, Carroll PJ, Schelter EJ. Accessing relatively electron poor cerium(iv) hydrazido complexes by lithium cation promoted ligand reduction. Dalton Trans 2016; 45:15249-58. [DOI: 10.1039/c6dt03154d] [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]
Abstract
A series of substituted N,N′-diarylhydrazines (ArNHNHAr) were reacted with Ce(iii)[N(SiMe3)2]3 and LiN(SiMe3)2 to form complexes of general formula Li4(OEt2)4 [Ce(iv)(ArNNAr)4] where the spectroscopic and redox properties were affected by the ligand substitution.
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Affiliation(s)
- Jessica R. Levin
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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10
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Karmel ISR, Fridman N, Tamm M, Eisen MS. Mixed Imidazolin-2-iminato–Cp* Thorium(IV) Complexes: Synthesis and Reactivity Toward Oxygen-Containing Substrates. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00273] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Isabell S. R. Karmel
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion − Israel Institute of Technology, Technion City, Haifa, 32000 Israel
| | - Natalia Fridman
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion − Israel Institute of Technology, Technion City, Haifa, 32000 Israel
| | - Matthias Tamm
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Moris S. Eisen
- Schulich
Faculty of Chemistry, Institute of Catalysis Science and Technology, Technion − Israel Institute of Technology, Technion City, Haifa, 32000 Israel
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11
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Robinson JR, Gu J, Carroll PJ, Schelter EJ, Walsh PJ. Exchange Processes in Shibasaki’s Rare Earth Alkali Metal BINOLate Frameworks and Their Relevance in Multifunctional Asymmetric Catalysis. J Am Chem Soc 2015; 137:7135-44. [DOI: 10.1021/jacs.5b02201] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jerome R. Robinson
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jun Gu
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Walsh
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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12
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Bruno SM, Ananias D, Almeida Paz FA, Pillinger M, Valente AA, Carlos LD, Gonçalves IS. Crystal structure and temperature-dependent luminescence of a heterotetranuclear sodium–europium(iii) β-diketonate complex. Dalton Trans 2015; 44:488-92. [DOI: 10.1039/c4dt02301c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A rare example of a heterotetranuclear Na2Eu2 complex is reported that displays temperature-dependent sensitised emission and emission lifetime.
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Affiliation(s)
- Sofia M. Bruno
- Department of Chemistry
- CICECO
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Duarte Ananias
- Department of Chemistry
- CICECO
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | | | - Martyn Pillinger
- Department of Chemistry
- CICECO
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Anabela A. Valente
- Department of Chemistry
- CICECO
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Luís D. Carlos
- Department of Physics
- CICECO
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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13
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Harada S, Morikawa T, Nishida A. Chiral Holmium Complex-Catalyzed Diels–Alder Reaction of Silyloxyvinylindoles: Stereoselective Synthesis of Hydrocarbazoles. Org Lett 2013; 15:5314-7. [DOI: 10.1021/ol402559z] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shinji Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Takahiro Morikawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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14
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Sircoglou M, Yang J, Guillot R, Bezzenine‐Lafollée S, Gandon V. Heterobimetallic Rare Earth–Lithium Complexes with Fewer Than Three Binaphtholates. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marie Sircoglou
- ICMMO (UMR CNRS 8182), LabEx CHARMMMAT Université Paris‐Sud, 91400 Orsay, France, Fax: +33‐1‐69154747, http://www.polycata.u‐psud.fr
| | - Jing Yang
- ICMMO (UMR CNRS 8182), LabEx CHARMMMAT Université Paris‐Sud, 91400 Orsay, France, Fax: +33‐1‐69154747, http://www.polycata.u‐psud.fr
| | - Régis Guillot
- ICMMO (UMR CNRS 8182), LabEx CHARMMMAT Université Paris‐Sud, 91400 Orsay, France, Fax: +33‐1‐69154747, http://www.polycata.u‐psud.fr
| | - Sophie Bezzenine‐Lafollée
- ICMMO (UMR CNRS 8182), LabEx CHARMMMAT Université Paris‐Sud, 91400 Orsay, France, Fax: +33‐1‐69154747, http://www.polycata.u‐psud.fr
| | - Vincent Gandon
- ICMMO (UMR CNRS 8182), LabEx CHARMMMAT Université Paris‐Sud, 91400 Orsay, France, Fax: +33‐1‐69154747, http://www.polycata.u‐psud.fr
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15
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Rodríguez-Solla H, Concellón C, Tuya P, García-Granda S, Díaz MR. Samarium-Promoted Asymmetric Aldol-Tishchenko Reaction: Synthesis of Amino Acid-Derived 4-Amino-1,3-diols. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100952] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Ichibakase T, Kaneko T, Orito Y, Kotani S, Nakajima M. Construction of quaternary carbon centers by a base-catalyzed enantioselective aldol reaction and related reactions of trimethoxysilyl enol ethers. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.03.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Seifert A, Rohr K, Mahrwald R. Acid-catalyzed aldol-Meerwein–Ponndorf–Verley-etherification reactions—access to defined configured quaternary stereogenic centers. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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18
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Martin M, El Hellani A, Yang J, Collin J, Bezzenine-Lafollée S. Synthesis of Rare Earth Catalysts and Their Applications for Enantioselective Synthesis of Heterocyclic β-Amino Alcohols. J Org Chem 2011; 76:9801-8. [DOI: 10.1021/jo2019015] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Myriam Martin
- Equipe de Catalyse Moléculaire,
ICMMO, UMR 8182, Bâtiment 420, Université Paris-Sud, 91405 Orsay, France
| | - Ahmad El Hellani
- Equipe de Catalyse Moléculaire,
ICMMO, UMR 8182, Bâtiment 420, Université Paris-Sud, 91405 Orsay, France
| | - Jing Yang
- Equipe de Catalyse Moléculaire,
ICMMO, UMR 8182, Bâtiment 420, Université Paris-Sud, 91405 Orsay, France
| | - Jacqueline Collin
- Equipe de Catalyse Moléculaire,
ICMMO, UMR 8182, Bâtiment 420, Université Paris-Sud, 91405 Orsay, France
- CNRS, F-91405 Orsay, France
| | - Sophie Bezzenine-Lafollée
- Equipe de Catalyse Moléculaire,
ICMMO, UMR 8182, Bâtiment 420, Université Paris-Sud, 91405 Orsay, France
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19
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Bew SP, Sharma SV. Do Commercially Available Metal Salts Mediate Calixarene Formation via Hydrogen-Bonded Dimers? J Org Chem 2011; 76:7076-83. [DOI: 10.1021/jo200927v] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sean P. Bew
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, U.K
| | - Sunil V. Sharma
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, U.K
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Ichibakase T, Nakajima M. Direct enantioselective aldol-Tishchenko reaction catalyzed by chiral lithium diphenylbinaphtholate. Org Lett 2011; 13:1579-81. [PMID: 21355567 DOI: 10.1021/ol103156h] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chiral lithium diphenylbinaphtholate is an effective catalyst for the enantioselective aldol-Tishchenko reaction, affording 1,3-diol derivatives with three contiguous chiral centers and high stereoselectivities. Successive aldol-aldol-Tishchenko reactions gave a triol derivative with five consecutive chiral centers. The present reaction was applicable to highly enantioselective Evans-Tishchenko reduction.
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Affiliation(s)
- Tomonori Ichibakase
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
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Stodulski M, Mamińska A, Mlynarski J. Asymmetric aldol-Tishchenko reaction catalyzed by Yb-complexes with basic amino acid-derived ligands. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.02.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Berg N, Jones LF. A series of alternating Na+/M3+ (M = Mn, Fe) covalent and ionic chains. CrystEngComm 2011. [DOI: 10.1039/c1ce05406f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Itoh S, Kitamura M, Yamada Y, Aoki S. Chiral catalysts dually functionalized with amino acid and Zn2+ complex components for enantioselective direct aldol reactions inspired by natural aldolases: design, synthesis, complexation properties, catalytic activities, and mechanistic study. Chemistry 2009; 15:10570-84. [PMID: 19746465 DOI: 10.1002/chem.200900733] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Aldolases are enzymes that catalyze stereospecific aldol reactions in a reversible manner. Naturally occurring aldolases include class I aldolases, which catalyze aldol reactions via enamine intermediates, and class II aldolases, in which Zn(2+) enolates of substrates react with acceptor aldehydes. In this work, Zn(2+) complexes of L-prolyl-pendant[15]aneN(5) (ZnL(3)), L-prolyl-pendant[12]aneN(4) (ZnL(4)), and L-valyl-pendant[12]aneN(4) (ZnL(5)) were designed and synthesized for use as chiral catalysts for enantioselective aldol reactions. The complexation constants for L(3) to L(5) with Zn(2+) [logK(s)(ZnL)] were determined to be 14.1 (for ZnL(3)), 7.6 (for ZnL(4)), and 9.6 (for ZnL(5)), indicating that ZnL(3) is more stable than ZnL(4) and ZnL(5). The deprotonation constants of Zn(2+)-bound water [pK(a)(ZnL) values] for ZnL(3), ZnL(4), and ZnL(5) were calculated to be 9.2 (for ZnL(3)), 8.2 (for ZnL(4)), and 8.6 (for ZnL(5)), suggesting that the Zn(2+) ions in ZnL(3) is a less acidic Lewis acid than in ZnL(4) and ZnL(5). These values also indicated that the amino groups on the side chains weakly coordinate to Zn(2+). We carried out aldol reactions between acetone and 2-chlorobenzaldehyde and other aldehydes in the presence of catalytic amounts of the chiral Zn(2+) complexes in acetone/H(2)O at 25 and 37 degrees C. Whereas ZnL(3) yielded the aldol product in 43% yield and 1% ee (R), ZnL(4) and ZnL(5) afforded good chemical yields and high enantioselectivities of up to 89% ee (R). UV titrations of proline and ZnL(4) with acetylacetone (acac) in DMSO/H(2)O (1:2) indicate that ZnL(4) facilitates the formation of the ZnL(4)(acac)(-) complex (K(app)=2.1x10(2) M(-1)), whereas L-proline forms a Schiff base with acac with a very small equilibrium constant. These results suggest that the amino acid components and the Zn(2+) ions in ZnL(4) and ZnL(5) function in a cooperative manner to generate the Zn(2+)-enolate of acetone, thus permitting efficient enantioselective C-C bond formation with aldehydes.
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Affiliation(s)
- Susumu Itoh
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
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Rohr K, Herre R, Mahrwald R. Toward Asymmetric Aldol-Tishchenko Reactions with Enolizable Aldehydes: Access to Defined Configured Stereotriads, Tetrads, and Stereopentads. J Org Chem 2009; 74:3744-9. [DOI: 10.1021/jo9003635] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kerstin Rohr
- Institut für Chemie, Humboldt-Universität, Brook-Taylor Str. 2, 12489 Berlin, Germany
| | - Robert Herre
- Institut für Chemie, Humboldt-Universität, Brook-Taylor Str. 2, 12489 Berlin, Germany
| | - Rainer Mahrwald
- Institut für Chemie, Humboldt-Universität, Brook-Taylor Str. 2, 12489 Berlin, Germany
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Dubessy B, Harthong S, Aronica C, Bouchu D, Busi M, Dalcanale E, Dutasta JP. Self-Complementary Phosphonate Cavitands. J Org Chem 2009; 74:3923-6. [DOI: 10.1021/jo900236n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Béatrice Dubessy
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
| | - Steven Harthong
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
| | - Christophe Aronica
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
| | - Denis Bouchu
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
| | - Marco Busi
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
| | - Enrico Dalcanale
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
| | - Jean-Pierre Dutasta
- Laboratoire de Chimie, CNRS, École Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon 07, France, Centre de Spectrométrie de Masse, Université Claude Bernard Lyon 1, 43 Bvd du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France, and Dipartimento di Chimica Organica e Industriale and INSTM UdR Parma, Università di Parma, Viale G. Usberti 17/A, 43100 Parma, Italy
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Sun J, Yang M, Yuan F, Jia X, Yang X, Pan Y, Zhu C. Catalytic Asymmetric Ring-Opening Reaction ofmeso-Epoxides with Aryl Selenols and Thiols Catalyzed by a Heterobimetallic Gallium-Titanium-Salen Complex. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200800767] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Stodulski M, Jaźwiński J, Mlynarski J. Synthesis of Yb Complexes with Amino-Acid-Armed Ligands for Direct Asymmetric Tandem Aldol Reduction Reactions. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800726] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tiwari AK, Kumbhare RM, Agawane SB, Ali AZ, Kumar KV. Reduction in post-prandial hyperglycemic excursion through α-glucosidase inhibition by β-acetamido carbonyl compounds. Bioorg Med Chem Lett 2008; 18:4130-2. [DOI: 10.1016/j.bmcl.2008.05.088] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 04/22/2008] [Accepted: 05/22/2008] [Indexed: 10/22/2022]
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Zuyls A, Roesky PW, Deacon GB, Konstas K, Junk PC. Lanthanide Formamidinates as Improved Catalysts for the Tishchenko Reaction. European J Org Chem 2008. [DOI: 10.1002/ejoc.200700827] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Matsunaga S, Shibasaki M. Multimetallic Bifunctional Asymmetric Catalysis Based on Proximity Effect Control. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.60] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Aratake S, Itoh T, Okano T, Nagae N, Sumiya T, Shoji M, Hayashi Y. Highly Diastereo- and Enantioselective Direct Aldol Reactions of Aldehydes and Ketones Catalyzed by Siloxyproline in the Presence of Water. Chemistry 2007; 13:10246-56. [PMID: 17896333 DOI: 10.1002/chem.200700363] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Proline-based organocatalysts have been developed for a highly enantioselective, direct aldol reaction of aldehydes and ketones in the presence of water. While several surfactant-proline combined catalysts have proved effective, proline derivatives with a hydrophobic moiety such as trans-siloxy-L-proline and cis-siloxy-D-proline, both of which are easily prepared from the same commercially available 4-hydroxy-L-proline, have been found to be the most effective organocatalysts examined in this study, affording the aldol product with excellent diastereo- and enantioselectivities, these two catalysts generating opposite enantiomers. Water affects the selectivity, and poor results are obtained under neat reaction conditions or in dry organic solvents. More than three equivalents of water are required for the best diastereo- and enantioselectivities, while three equivalents is the recommended amount from a synthetic point of view. The reaction proceeds in the organic phase, and also proceeds in the presence of a large amount of water. The large-scale preparation of aldols with the minimal use of an organic solvent, including in the purification step, is described.
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Affiliation(s)
- Seiji Aratake
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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Kirsch SF, Liébert C. Neodymium(III)-Mediated Reformatsky-Type Reactions of α-Halo Ketones with Carbonyl Compounds. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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37
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Wooten AJ, Carroll PJ, Walsh PJ. Impact of Na- and K-C pi-interactions on the structure and binding of M3(sol)n(BINOLate)3Ln catalysts. Org Lett 2007; 9:3359-62. [PMID: 17658838 PMCID: PMC2597426 DOI: 10.1021/ol0713234] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Shibasaki's heterobimetallic complexes M3(THF)n(BINOLate)3Ln [M = Li, Na, K; Ln = lanthanide(III)] are among the most successful asymmetric Lewis acid catalysts. Why does M3(THF)n(BINOLate)3Ln readily bind substrates when M = Li but not when M = Na or K? Structural studies herein indicate Na- and K-C cation-pi interactions and alkali metal radius may be more important than even lanthanide radius. Also reported is a novel polymeric [K3(THF)2(BINOLate)3Yb]n structure that provides the first evidence of interactions between M3(THF)n(BINOLate)3Ln complexes.
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Wooten A, Salvi L, Carroll P, Walsh P. Characterization of Dimeric and Tetrameric μ-Hydroxide Ytterbium(III) Binaphtholate Complexes. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600600] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Shibasaki M, Kanai M. Catalytic enantioselective construction of tetrasubstituted carbons by self-assembled poly rare earth metal complexes. Org Biomol Chem 2007; 5:2027-39. [PMID: 17581645 DOI: 10.1039/b704542e] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rare earth metal-based enantioselective catalysts that can promote practical cyanation reactions of ketones and ketoimines were developed. These catalytic enantioselective tetrasubstituted carbon-forming reactions are useful platforms for the synthesis of biologically active compounds. ESI-MS and crystallographic studies of the asymmetric catalysts revealed that the active catalysts are polymetallic complexes produced through the assembly of modules. The higher-order structure of the polymetallic complexes has strong effects on catalyst activity and enantioselectivity. Controlling the higher-order structure of artificial polymetallic asymmetric catalysts is a new strategy for optimizing asymmetric catalysts. Recent progress in this approach is also described.
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Affiliation(s)
- Masakatsu Shibasaki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Mlynarski J, Rakiel B, Stodulski M, Suszczyńska A, Frelek J. Chiral Ytterbium Complex-Catalyzed Direct Asymmetric Aldol-Tishchenko Reaction: Synthesis ofanti-1,3-Diols. Chemistry 2006; 12:8158-67. [PMID: 16871507 DOI: 10.1002/chem.200600357] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The asymmetric aldol-Tishchenko reaction of aromatic aldehydes with aliphatic and aromatic ketones has been developed as an efficient strategy for the synthesis of anti-1,3-diols in good yield with high diastereocontrol and good levels of enantioselectivity. This domino-type reaction is catalyzed by a chiral ytterbium complex that promotes both the aldol reaction through enolization of the carbonyl compound and the Evans-Tishchenko reduction of the aldol intermediate. The stereochemistry of the resulting diols is also investigated and finally proved by using CD techniques.
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Affiliation(s)
- Jacek Mlynarski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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Affiliation(s)
- Jacek Mlynarski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01‐224 Warsaw, Poland, Fax: +48‐22‐632‐66‐81
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Zirconium–BINOLate-catalyzed, enantioselective aldol-Tishchenko reactions of aromatic ketone aldols. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.10.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Maki K, Motoki R, Fujii K, Kanai M, Kobayashi T, Tamura S, Shibasaki M. Catalyst-controlled asymmetric synthesis of fostriecin and 8-epi-fostriecin. J Am Chem Soc 2006; 127:17111-7. [PMID: 16316259 DOI: 10.1021/ja0562043] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Catalytic asymmetric synthesis of the natural antibiotic fostriecin (CI-920) and its analogue 8-epi-fostriecin and evaluation of their biological activity are described. We used four catalytic asymmetric reactions to construct all of the chiral centers of fostriecin and 8-epi-fostriecin; cyanosilylation of a ketone, Yamamoto allylation, direct aldol reaction, and Noyori reduction, two of which were developed by our group. Catalytic enantioselective cyanosilylation of ketone 13 produced the chiral tetrasubstituted carbon at C-8. Both enantiomers of the product cyanohydrin were obtained with high enantioselectivity by switching the center metal of the catalyst from titanium to gadolinium. Yamamoto allylation constructed the C-5 chiral carbon in the alpha,beta-unsaturated lactone moiety. A direct catalytic asymmetric aldol reaction of an alkynyl ketone using LLB catalyst constructed the chirality at C-9 with the introduction of a synthetically versatile alkyne moiety, which was later converted to cis-vinyl iodide, the substrate for the subsequent Stille coupling for the triene synthesis. Noyori reduction produced the secondary alcohol at C-11 from the acetylene ketone 6 with excellent selectivity. Importantly, all the stereocenters were constructed under catalyst control in this synthesis. This strategy should be useful for rapid synthesis of stereoisomers of fostriecin.
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Affiliation(s)
- Keisuke Maki
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Japan
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