1
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Ning C, Yu ZQ, Wei Y, Shi M. Palladium catalyzed stereoselective intramolecular [3 + 2] cycloaddition reactions of ( E) & ( Z)-ene-vinylidenecyclopropanes. Org Biomol Chem 2024; 22:4445-4449. [PMID: 38752342 DOI: 10.1039/d4ob00607k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
A palladium-catalyzed ring-opening cyclization of (E) & (Z)-ene-vinylidenecyclopropanes has been developed via an intramolecular [3 + 2] cycloaddition process in the presence of a sterically bulky biaryl phosphine ligand, stereoselectively affording fused cis- & trans-bicyclo[4.3.0] skeletal products in good yields with a broad substrate scope and good functional tolerance. A plausible reaction mechanism was proposed on the basis of previous work and the DFT calculations.
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Affiliation(s)
- Chao Ning
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zi-Qi Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Lu, Shanghai, 200032, China.
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Lu, Shanghai, 200032, China.
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2
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Li MM, Zhang T, Cheng L, Xiao WG, Ma JT, Xiao LJ, Zhou QL. Ketone α-alkylation at the more-hindered site. Nat Commun 2023; 14:3326. [PMID: 37286579 DOI: 10.1038/s41467-023-38741-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 05/10/2023] [Indexed: 06/09/2023] Open
Abstract
Control of the regioselectivity of α-alkylation of carbonyl compounds is a longstanding topic of research in organic chemistry. By using stoichiometric bulky strong bases and carefully adjusting the reaction conditions, selective alkylation of unsymmetrical ketones at less-hindered α-sites has been achieved. In contrast, selective alkylation of such ketones at more-hindered α-sites remains a persistent challenge. Here we report a nickel-catalysed alkylation of unsymmetrical ketones at the more-hindered α-sites with allylic alcohols. Our results indicate that the space-constrained nickel catalyst bearing a bulky biphenyl diphosphine ligand enables the preferential alkylation of the more-substituted enolate over the less-substituted enolate and reverses the conventional regioselectivity of ketone α-alkylation. The reactions proceed under neutral conditions in the absence of additives, and water is the only byproduct. The method has a broad substrate scope and permits late-stage modification of ketone-containing natural products and bioactive compounds.
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Affiliation(s)
- Ming-Ming Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Tianze Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Lei Cheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Wei-Guo Xiao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Jin-Tao Ma
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Li-Jun Xiao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China.
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China.
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3
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Balcerzak L, Surowiak AK, Adamowicz A, Kaleta M, Pieńkosz-Żagan A, Strub DJ. Evaluation of small combinatorial libraries of nitrogenous low-molecular-weight compounds for new fragrance development. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Synthesis of Cyclic Fragrances via Transformations of Alkenes, Alkynes and Enynes: Strategies and Recent Progress. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113576. [PMID: 35684511 PMCID: PMC9182196 DOI: 10.3390/molecules27113576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 12/04/2022]
Abstract
With increasing demand for customized commodities and the greater insight and understanding of olfaction, the synthesis of fragrances with diverse structures and odor characters has become a core task. Recent progress in organic synthesis and catalysis enables the rapid construction of carbocycles and heterocycles from readily available unsaturated molecular building blocks, with increased selectivity, atom economy, sustainability and product diversity. In this review, synthetic methods for creating cyclic fragrances, including both natural and synthetic ones, will be discussed, with a focus on the key transformations of alkenes, alkynes, dienes and enynes. Several strategies will be discussed, including cycloaddition, catalytic cyclization, ring-closing metathesis, intramolecular addition, and rearrangement reactions. Representative examples and the featured olfactory investigations will be highlighted, along with some perspectives on future developments in this area.
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5
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Wamser N, Wu H, Buono F, Brundage A, Ricci F, Lorenz JC, Wang J, Haddad N, Paolillo J, Leung JC, Lee H, Hossain A. Discovery and Process Development of a Scalable Biocatalytic Kinetic Resolution toward Synthesis of a Sterically Hindered Chiral Ketone. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicole Wamser
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Hao Wu
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Frederic Buono
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Anthony Brundage
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Francesco Ricci
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Jon C. Lorenz
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Jun Wang
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Nizar Haddad
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Joshua Paolillo
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Joyce C. Leung
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Heewon Lee
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Azad Hossain
- Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
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6
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Cheng Z, Gu Q, Xie Y, Zhang Y, Zeng X. BF 3·Et 2O-Mediated annulation of α-keto acids with aliphatic ketones for the synthesis of γ-hydroxy-butenolides and γ-alkylidene-butenolides. RSC Adv 2022; 12:24237-24241. [PMID: 36128547 PMCID: PMC9404108 DOI: 10.1039/d2ra04546j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/18/2022] [Indexed: 11/21/2022] Open
Abstract
Annulation reaction of α-keto acids with cyclic or acyclic aliphatic ketones is reported herein to divergently access γ-hydroxy-butenolides and γ-alkylidene-butenolides depending on the amount of BF3·Et2O. This protocol features good functional tolerance and ease of operation, to open a route to access butenolides via an annulation and dehydration process. An efficient approach to divergently access γ-hydroxy-butenolides and γ-alkylidene-butenolides via annulation reaction of α-keto acids with simple aliphatic ketones is reported herein.![]()
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Affiliation(s)
- Zhenfeng Cheng
- School of Pharmacy, Nantong University, Nantong 226001, P. R. China
| | - Qingyun Gu
- School of Pharmacy, Nantong University, Nantong 226001, P. R. China
| | - Yushan Xie
- School of Pharmacy, Nantong University, Nantong 226001, P. R. China
| | - Yanan Zhang
- School of Pharmacy, Nantong University, Nantong 226001, P. R. China
| | - Xiaobao Zeng
- School of Pharmacy, Nantong University, Nantong 226001, P. R. China
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7
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Liu X, Rong X, Liu S, Lan Y, Liu Q. Cobalt-Catalyzed Desymmetric Isomerization of Exocyclic Olefins. J Am Chem Soc 2021; 143:20633-20639. [PMID: 34870975 DOI: 10.1021/jacs.1c11343] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Chiral cyclic olefins, 1-methylcyclohexenes, are versatile building blocks for the synthesis of pharmaceuticals and natural products. Despite the prevalence of these structural motifs, the development of efficient synthetic methods remains an unmet challenge. Herein we report a novel desymmetric isomerization of exocyclic olefins using a series of newly designed chiral cobalt catalysts, which enables a straightforward construction of chiral 1-methylcyclohexenes with diversified functionalities. The synthetic utility of this methodology is highlighted by a concise and enantioselective synthesis of a natural product, β-bisabolene. The versatility of the reaction products is further demonstrated by multifarious derivatizations.
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Affiliation(s)
- Xufang Liu
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
| | - Xianle Rong
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
| | - Shihan Liu
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, People's Republic of China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, People's Republic of China
| | - Qiang Liu
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
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8
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Jin M, Tang C, Li Y, Yang S, Yang YT, Peng L, Li XN, Zhang W, Zuo Z, Gagosz F, Wang LL. Enantioselective access to tricyclic tetrahydropyran derivatives by a remote hydrogen bonding mediated intramolecular IEDHDA reaction. Nat Commun 2021; 12:7188. [PMID: 34893616 PMCID: PMC8664811 DOI: 10.1038/s41467-021-27521-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 11/25/2021] [Indexed: 11/22/2022] Open
Abstract
Inverse-electron-demand-hetero-Diels-Alder reactions of alkenes with α,β-unsaturated keto compounds allow rapid access to the tetrahydropyran ring found in numerous natural products and bioactive molecules. Despite its synthetic interest, catalytic asymmetric versions of this process remain underdeveloped, especially regarding the use of non-activated alkenes reacting with α,β-unsaturated ketone or aldehyde, for which no report can be found in the literature. Herein, we describe the catalytic inverse-electron-demand-hetero-Diels-Alder reactions between neutral alkenes and an α,β-unsaturated ketones or aldehydes to produce a variety of trans-fused [5,6,8] tricyclic structures containing a central, chiral tetrahydropyran ring. This complex transformation, which is achieved using a chiral phosphoric acid, allows for the formation of four stereogenic centers in a single step with high regio-, diastereo- and enantioselectivity (up to 99% ee). Such level of stereocontrol could be achieved by a key remote double hydrogen atom bonding interaction between the linear substrate and the catalyst. Although the hetero-Diels–Alder reaction is a staple of organic chemistry, catalytic asymmetric versions of the inverse-electron demand variant often require specially engineered substrates for the reaction to work. Here the authors cyclize non-activated alkenes with α,β-unsaturated ketones or aldehydes to form chiral fused heterocycles using a chiral phosphoric acid catalyst.
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Affiliation(s)
- Min Jin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650201, Kunming, PR China
| | - Congyun Tang
- School of Food and Chemical Engineering, Shaoyang University, 422000, Shaoyang, PR China
| | - Yingying Li
- School of Chemical Engineering, Sichuan University of Science & Engineering, 643000, Zigong, PR China
| | - Shuai Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650201, Kunming, PR China
| | - Ying-Tao Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650201, Kunming, PR China
| | - Lin Peng
- School of Food and Chemical Engineering, Shaoyang University, 422000, Shaoyang, PR China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650201, Kunming, PR China
| | - Wenjing Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 450001, Zhengzhou, Henan Province, PR China.
| | - Zhili Zuo
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650201, Kunming, PR China.
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5, Ottawa, Canada
| | - Liang-Liang Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 650201, Kunming, PR China.
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9
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Wang J, He F, Yang X. Asymmetric construction of acyclic quaternary stereocenters via direct enantioselective additions of α-alkynyl ketones to allenamides. Nat Commun 2021; 12:6700. [PMID: 34795297 PMCID: PMC8602376 DOI: 10.1038/s41467-021-27028-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 10/26/2021] [Indexed: 12/11/2022] Open
Abstract
Acyclic quaternary stereocenters are widely present in a series of biologically active natural products and pharmaceuticals. However, development of highly efficient asymmetric catalytic methods for the construction of these privileged motifs represents a longstanding challenge in organic synthesis. Herein, an efficient chiral phosphoric acid catalyzed direct asymmetric addition of α-alkynyl acyclic ketones with allenamides has been developed, furnishing the acyclic all-carbon quaternary stereocenters with excellent regioselectivities and high enantioselectivities. Extensive and detailed experimental mechanistic studies were performed to investigate the mechanism of this reaction. Despite a novel covalent allyl phosphate intermediate was found in these reactions, further studies indicated that a SN2-type mechanism with the ketone nucleophiles is not very possible. Instead, a more plausible mechanism involving the elimination of the allyl phosphate to give the α,β-unsaturated iminium intermediate, which underwent the asymmetric conjugate addition with the enol form of ketone nucleophiles under chiral anion catalysis, was proposed. In virtue of the fruitful functional groups bearing in the chiral products, the diverse derivatizations of the chiral products provided access to a wide array of chiral scaffolds with quaternary stereocenters.
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Affiliation(s)
- Jiawen Wang
- School of Physical Science and Technology, ShanghaiTech University, 201210, Shanghai, China
| | - Faqian He
- School of Physical Science and Technology, ShanghaiTech University, 201210, Shanghai, China
| | - Xiaoyu Yang
- School of Physical Science and Technology, ShanghaiTech University, 201210, Shanghai, China.
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10
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Lamhauge JN, Corti V, Liu Y, Jørgensen KA. Enantioselective α‐Etherification of Branched Aldehydes via an Oxidative Umpolung Strategy. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105721] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Johannes N. Lamhauge
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
| | - Vasco Corti
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
| | - Yidong Liu
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
| | - Karl Anker Jørgensen
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
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11
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Lamhauge JN, Corti V, Liu Y, Jørgensen KA. Enantioselective α-Etherification of Branched Aldehydes via an Oxidative Umpolung Strategy. Angew Chem Int Ed Engl 2021; 60:18728-18733. [PMID: 34087048 DOI: 10.1002/anie.202105721] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Indexed: 11/05/2022]
Abstract
Saturated carbonyl compounds are, via their enolate analogues, inherently nucleophilic at the α-position. In the presence of a benzoquinone oxidant, the polarity of the α-position of racemic α-branched aldehydes is inverted, allowing for an enantioselective etherification using readily available oxygen-based nucleophiles and an amino acid-derived primary amine catalyst. A survey of benzoquinone oxidants identified p-fluoranil and DDQ as suitable reaction partners. p-Fluoranil enables the preparation of α-aryloxylated aldehydes using phenol nucleophiles in up to 91 % ee, following either a one-step or a two-step, one-pot protocol. DDQ allows for a more general etherification protocol in combination with a broader range of alcohol nucleophiles with enantioselectivities up to 95 % ee. Control experiments and isolation of a key quinol intermediate supports a mechanism proceeding via an SN 2 dynamic-kinetic resolution. These studies provide the basis for an aminocatalytic umpolung concept that allows for the asymmetric construction of tertiary ethers in the α-position of aldehydes.
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Affiliation(s)
- Johannes N Lamhauge
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Vasco Corti
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Yidong Liu
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Karl Anker Jørgensen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
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12
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Singh VK, Chakraborty TK. Total Synthesis of Panaginsene. Chem Asian J 2021; 16:753-756. [PMID: 33638240 DOI: 10.1002/asia.202100144] [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: 02/09/2021] [Revised: 02/26/2021] [Indexed: 11/10/2022]
Abstract
The total synthesis of panaginsene has been accomplished in 11 linear steps starting from methyl 3,3-dimethyl-5-oxocyclopent-1-ene-1-carboxylate. The key steps are a Sharpless asymmetric epoxidation and Ti(III)-mediated reductive epoxide opening-radical cyclization to construct the chiral quaternary carbon stereocenter followed by a very challenging HWE olefination reaction on an 1,3-keto aldehyde and a late stage McMurry olefination using low valent titanium to construct the highly constrained angular tetrasubstituted olefin in a five-membered ring.
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Affiliation(s)
- Vipin Kumar Singh
- Department of Organic Chemistry, Indian Institute of Science, Bengaluru, 560012, India
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13
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Zhu Q, Luo Y, Guo Y, Zhang Y, Tao Y. Saegusa Oxidation of Enol Ethers at Extremely Low Pd-Catalyst Loadings under Ligand-free and Aqueous Conditions: Insight into the Pd(II)/Cu(II)-Catalyst System. J Org Chem 2021; 86:5463-5476. [PMID: 33765382 DOI: 10.1021/acs.joc.0c02987] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly efficient and practical Pd(II)/Cu(OAc)2-catalyst system of Saegusa oxidation, which converts enol ethers to the corresponding enals with a number of diverse substrates at extremely low catalyst loadings (500 mol ppm) under ligand-free and aqueous conditions, is described. Its synthetic utility was demonstrated by large-scale applications of the catalyst system to important nature molecules. This work allows Saegusa oxidation to become a highly practical approach to preparing enals and also suggests new insight into the Pd(II)/Cu(II)-catalyst system for dehydrogenation of carbonyl compounds and decreasing Pd-catalyst loadings.
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Affiliation(s)
- Quan Zhu
- Kunming Biohome Technology Co. Limited, Kunming 650501, PR China
| | - Yunsong Luo
- Kunming Biohome Technology Co. Limited, Kunming 650501, PR China
| | - Yongyan Guo
- Kunming Biohome Technology Co. Limited, Kunming 650501, PR China
| | - Yushun Zhang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Yunhai Tao
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China.,Kunming Biohome Technology Co. Limited, Kunming 650501, PR China
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14
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Li C, Ragab SS, Liu G, Tang W. Enantioselective formation of quaternary carbon stereocenters in natural product synthesis: a recent update. Nat Prod Rep 2021; 37:276-292. [PMID: 31515549 DOI: 10.1039/c9np00039a] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Covering: 2013-2018 Natural products bearing quaternary carbon stereocenters have attracted tremendous interest from the synthetic community due to their diverse biological activities and fascinating molecular architectures. However, the construction of these molecules in an enantioselective fashion remains a long-standing challenge because of the lack of efficient asymmetric catalytic methods for installing these motifs. The rapid progress in the development of new-generation efficient chiral catalysts has opened the door for several asymmetric reactions, such as Michael addition, dearomative cyclization, polyene cyclization, α-arylation, cycloaddition, allylation, for the construction of quaternary carbon stereocenters in a highly enantioselective fashion. These asymmetric catalytic methods have greatly facilitated the synthesis of complex natural products with improved output and overall efficiency. In this concise review, we highlight the progress in the last six years in complex natural product synthesis, in which at least one quaternary carbon stereocenter has been constructed via asymmetric catalytic technologies, with particular emphasis on the analysis of the stereochemical model of each enantioselective transformation.
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Affiliation(s)
- Chengxi Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.
| | - Sherif Shaban Ragab
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China. and Photochemistry Department, Chemical Industries Research Division, National Research Centre, Dokki, 12622, Giza, Egypt
| | - Guodu Liu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China. and Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.
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15
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Lyu Y, Ren S, Zhong F, Han X, He Y, Tang Z. Synthetic musk fragrances in sediments from a subtropical river-lake system in eastern China: occurrences, profiles, and ecological risks. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:14597-14606. [PMID: 33216301 DOI: 10.1007/s11356-020-11486-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/29/2020] [Indexed: 06/11/2023]
Abstract
Synthetic musk fragrances (SMFs) in aquatic environments have been of increasing concern because of their potential characteristic of persistent, bioaccumulated, and ecological harm. However, little is known about the distribution of SMFs in river-lake systems. In this study, the occurrence and risks of six SMFs measured in sediments from Lake Chaohu (eastern China) and the rivers flowing into it were investigated. The total sedimentary SMF concentrations ranged from 2.43 to 15.5 ng/g in Lake Chaohu (median = 5.17 ng/g), and 2.34-104 ng/g in the rivers (median = 10.6 ng/g). Overall, moderate levels of SMFs were found in comparison with previous results from other areas. Galaxolide and tonalide dominated in the rivers whereas cashmeran was dominant in Lake Chaohu. A source assessment indicated that the discharge from industries contributed importantly to the pollution of SMFs in the studied waters, in addition to the inputs from domestic sewage. Our estimates suggested that the current sedimentary SMF concentrations were likely to pose extremely low ecological risk to aquatic organisms. However, more studies are needed to focus on the spatial and temporal trends in distribution as well as the ecotoxicological implications of SMFs in the Lake Chaohu area because there is a general lack of relevant information.
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Affiliation(s)
- Yang Lyu
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Shan Ren
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Fuyong Zhong
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Xue Han
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Ying He
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Zhenwu Tang
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China.
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16
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Liu J, Zhou L, Zou Y, Wang Q, Goeke A. Oxovanadium-catalysed domino reactions of hydroxy enynes for the construction of Cashmeran-like odorants. Org Biomol Chem 2020; 18:7832-7836. [PMID: 32996524 DOI: 10.1039/d0ob01731k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An atom-economical oxovanadate-catalysed cycloisomerization of hydroxy enynes for the synthesis of bicyclo[4.3.0]non-1(9)-en-2-ones is disclosed, which can be rationalised through a cascade reaction of a dissociative Meyer-Schuster rearrangement to allenyl vanadates, followed by a thermal intramolecular Diels-Alder (IMDA) reaction and hydrolytic regeneration of the catalyst.
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Affiliation(s)
- Jie Liu
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, P. R. China.
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17
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Armanino N, Charpentier J, Flachsmann F, Goeke A, Liniger M, Kraft P. Heiße Luft oder cooler Duft? Die Trends der letzten 20 Jahre in der Riechstoffchemie. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nicolas Armanino
- Givaudan Schweiz AGFragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Schweiz
| | - Julie Charpentier
- Givaudan Schweiz AGFragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Schweiz
| | - Felix Flachsmann
- Givaudan Schweiz AGFragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Schweiz
| | - Andreas Goeke
- Givaudan Schweiz AGFragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Schweiz
| | - Marc Liniger
- Givaudan Schweiz AGFragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Schweiz
| | - Philip Kraft
- Givaudan Schweiz AGFragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Schweiz
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18
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Armanino N, Charpentier J, Flachsmann F, Goeke A, Liniger M, Kraft P. What's Hot, What's Not: The Trends of the Past 20 Years in the Chemistry of Odorants. Angew Chem Int Ed Engl 2020; 59:16310-16344. [DOI: 10.1002/anie.202005719] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 01/05/2023]
Affiliation(s)
- Nicolas Armanino
- Givaudan Schweiz AG Fragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Switzerland
| | - Julie Charpentier
- Givaudan Schweiz AG Fragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Switzerland
| | - Felix Flachsmann
- Givaudan Schweiz AG Fragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Switzerland
| | - Andreas Goeke
- Givaudan Schweiz AG Fragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Switzerland
| | - Marc Liniger
- Givaudan Schweiz AG Fragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Switzerland
| | - Philip Kraft
- Givaudan Schweiz AG Fragrances S&T, Ingredients Research Kemptpark 50 8310 Kemptthal Switzerland
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19
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Ye X, Pan Y, Chen Y, Yang X. Enantioselective Construction of Sulfur‐Containing Tetrasubstituted Stereocenters via Asymmetric Functionalizations of α‐Sulfanyl Cyclic Ketones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xueqian Ye
- School of Physical Science and TechnologyShanghaiTech University Shanghai 201210 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Yongkai Pan
- School of Physical Science and TechnologyShanghaiTech University Shanghai 201210 People's Republic of China
| | - Yunrong Chen
- School of Physical Science and TechnologyShanghaiTech University Shanghai 201210 People's Republic of China
| | - Xiaoyu Yang
- School of Physical Science and TechnologyShanghaiTech University Shanghai 201210 People's Republic of China
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20
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Kawasaki M, Kato D, Okada T, Morita Y, Tanaka Y, Toyooka N. Synthesis and olfactory evaluation of optically active β-alkyl substituted γ-lactones and whiskey lactone analogues. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Lvov AG, Yadykov AV, Lyssenko KA, Heinemann FW, Shirinian VZ, Khusniyarov MM. Reversible Shifting of a Chemical Equilibrium by Light: The Case of Keto-Enol Tautomerism of a β-Ketoester. Org Lett 2020; 22:604-609. [PMID: 31909627 DOI: 10.1021/acs.orglett.9b04376] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Manipulating the equilibrium between a ketone and an enol by light opens up ample opportunities in material chemistry and photopharmacology. By incorporating β-ketoester into the ethene bridge of a photoactive diarylethene, we achieved reversible light-induced tautomerization to give thermally stable enol. In a pristine state, the tautomeric equilibrium is almost completely shifted toward the ketone. Photocyclization of diarylethene results in a new equilibrium containing a significant fraction of the enol tautomer.
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Affiliation(s)
- Andrey G Lvov
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 47, Leninsky prosp , 119991 Moscow , Russian Federation.,Department of Chemistry and Pharmacy , Friedrich-Alexander University Erlangen-Nürnberg (FAU) , Egerlandstrasse 1 , 91058 Erlangen , Germany
| | - Anton V Yadykov
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 47, Leninsky prosp , 119991 Moscow , Russian Federation
| | - Konstantin A Lyssenko
- Department of Chemistry , Lomonosov Moscow State University , 119992 Moscow , Russian Federation
| | - Frank W Heinemann
- Department of Chemistry and Pharmacy , Friedrich-Alexander University Erlangen-Nürnberg (FAU) , Egerlandstrasse 1 , 91058 Erlangen , Germany
| | - Valerii Z Shirinian
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 47, Leninsky prosp , 119991 Moscow , Russian Federation
| | - Marat M Khusniyarov
- Department of Chemistry and Pharmacy , Friedrich-Alexander University Erlangen-Nürnberg (FAU) , Egerlandstrasse 1 , 91058 Erlangen , Germany
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22
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Wei L, Chen L, Le Bideau F, Retailleau P, Dumas F. Straightforward access to densely substituted chiral succinimides through enantioselective organocatalyzed Michael addition of α-alkyl-cyclic ketones to maleimides. Org Chem Front 2020. [DOI: 10.1039/c9qo01463b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple, cheap and unchanged organocatalytic system provides efficient access to densely substituted chiral succinimides bearing QCC–TCC vicinal stereocenters from unreactive α-alkyl cyclic ketones and maleimides.
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Affiliation(s)
- Lai Wei
- UMR CNRS 8076 BioCIS
- Conception et Synthèse de Molécules d'Intérêt Thérapeutique (CoSMIT)
- CNRS-Université Paris Sud
- Université Paris-Saclay
- Faculté de Pharmacie
| | - Li Chen
- UMR CNRS 8076 BioCIS
- Conception et Synthèse de Molécules d'Intérêt Thérapeutique (CoSMIT)
- CNRS-Université Paris Sud
- Université Paris-Saclay
- Faculté de Pharmacie
| | - Franck Le Bideau
- UMR CNRS 8076 BioCIS
- Conception et Synthèse de Molécules d'Intérêt Thérapeutique (CoSMIT)
- CNRS-Université Paris Sud
- Université Paris-Saclay
- Faculté de Pharmacie
| | - Pascal Retailleau
- UPR 2301
- Institut de Chimie des Substances Naturelles
- CNRS
- Gif sur Yvette F-91198
- France
| | - Françoise Dumas
- UMR CNRS 8076 BioCIS
- Conception et Synthèse de Molécules d'Intérêt Thérapeutique (CoSMIT)
- CNRS-Université Paris Sud
- Université Paris-Saclay
- Faculté de Pharmacie
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23
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Ye X, Pan Y, Yang X. Direct enantioselective Mannich reactions of α-azido cyclic ketones: asymmetric construction of chiral azides possessing an α-quaternary stereocenter. Chem Commun (Camb) 2019; 56:98-101. [PMID: 31790111 DOI: 10.1039/c9cc08000g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Direct enantioselective Mannich reactions of α-azido cyclic ketones with aldimines are realized through chiral phosphoric acid catalysis, which generate chiral azides possessing an α-quanternary stereocenter with complete regioselectivities and high diastereoselectivities and enantioselectivities.
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Affiliation(s)
- Xueqian Ye
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
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24
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Ma D, Miao CB, Sun J. Catalytic Enantioselective House-Meinwald Rearrangement: Efficient Construction of All-Carbon Quaternary Stereocenters. J Am Chem Soc 2019; 141:13783-13787. [PMID: 31429560 DOI: 10.1021/jacs.9b07514] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A catalytic asymmetric House-Meinwald rearrangement for the synthesis of both cyclic and acyclic ketones is disclosed. From readily accessible racemic tetrasubstituted epoxides, this approach provides efficient access to chiral ketones bearing α all-carbon quaternary stereocenters with high enantiocontrol. The observation of positive nonlinear effects and nontrivial kinetic feature provided important insights into the mechanism.
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Affiliation(s)
- Dengke Ma
- Department of Chemistry and Shenzhen Research Institute , the Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong SAR , China
| | - Chun-Bao Miao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering , Changzhou University , Changzhou , Jiangsu , China
| | - Jianwei Sun
- Department of Chemistry and Shenzhen Research Institute , the Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong SAR , China.,Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering , Changzhou University , Changzhou , Jiangsu , China
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25
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Wu H, Wang Q, Zhu J. Catalytic Enantioselective Pinacol and Meinwald Rearrangements for the Construction of Quaternary Stereocenters. J Am Chem Soc 2019; 141:11372-11377. [DOI: 10.1021/jacs.9b04551] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products, Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
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26
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Kimm M, Ošeka M, Kaabel S, Metsala A, Järving I, Kanger T. [2,3]-Wittig Rearrangement as a Formal Asymmetric Alkylation of α-Branched Ketones. Org Lett 2019; 21:4976-4980. [PMID: 31247768 DOI: 10.1021/acs.orglett.9b01495] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The enantioselective [2,3]-Wittig rearrangement of cinnamyloxycyclopentanone derivatives was performed in the presence of a Cinchona-based primary amine. The described method provides synthetically valuable α-hydroxy ketones with quaternary stereogenic centers in excellent enantiomeric purities. Relying on the X-ray crystal structure of the product and the DFT calculations, we propose that the rearrangement is promoted by an intramolecular hydrogen bond between the substrate and the catalyst.
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Affiliation(s)
- Mariliis Kimm
- Department of Chemistry and Biotechnology , Tallinn University of Technology , Akadeemia tee 15 , 12618 Tallinn , Estonia
| | - Maksim Ošeka
- Department of Chemistry and Biotechnology , Tallinn University of Technology , Akadeemia tee 15 , 12618 Tallinn , Estonia
| | - Sandra Kaabel
- Department of Chemistry and Biotechnology , Tallinn University of Technology , Akadeemia tee 15 , 12618 Tallinn , Estonia
| | - Andrus Metsala
- Department of Chemistry and Biotechnology , Tallinn University of Technology , Akadeemia tee 15 , 12618 Tallinn , Estonia
| | - Ivar Järving
- Department of Chemistry and Biotechnology , Tallinn University of Technology , Akadeemia tee 15 , 12618 Tallinn , Estonia
| | - Tõnis Kanger
- Department of Chemistry and Biotechnology , Tallinn University of Technology , Akadeemia tee 15 , 12618 Tallinn , Estonia
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27
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Urruzuno I, Mugica O, Zanella G, Vera S, Gómez‐Bengoa E, Oiarbide M, Palomo C. α‐Branched Ketone Dienolates: Base‐Catalysed Generation and Regio‐ and Enantioselective Addition Reactions. Chemistry 2019; 25:9701-9709. [DOI: 10.1002/chem.201901694] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Iñaki Urruzuno
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Odei Mugica
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Giovanna Zanella
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Enrique Gómez‐Bengoa
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHU Manuel Lardizabal 3 20018 San Sebastián Spain
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28
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Kawasaki M, Kuroyanagi S, Ito T, Morita H, Tanaka Y, Toyooka N. Synthesis and olfactory properties of Phantolide analogues in racemic and optically active forms. FLAVOUR FRAG J 2018. [DOI: 10.1002/ffj.3483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Masashi Kawasaki
- Department of Liberal Arts and SciencesFaculty of EngineeringToyama Prefectural University 5180 Kurokawa Imizu Toyama‐ken 939‐0398 Japan
| | - Saki Kuroyanagi
- Graduate School of Science and EngineeringUniversity of Toyama 3190 Gofuku Toyama 930‐8555 Japan
| | - Takuya Ito
- Division of Natural Products ChemistryInstitute of Natural MedicineUniversity of Toyama 2630 Sugitani Toyama 930‐0194 Japan
| | - Hiroyuki Morita
- Division of Natural Products ChemistryInstitute of Natural MedicineUniversity of Toyama 2630 Sugitani Toyama 930‐0194 Japan
| | - Yasuo Tanaka
- TAIYO CORPORATION 1‐6‐27 Higashiawaji, Yodogawa‐ku Osaka 533‐0023 Japan
| | - Naoki Toyooka
- Graduate School of Science and EngineeringUniversity of Toyama 3190 Gofuku Toyama 930‐8555 Japan
- Graduate School of Innovative Life ScienceUniversity of Toyama 3190 Gofuku Toyama 930‐8555 Japan
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29
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Shevchenko GA, Oppelaar B, List B. Enolkatalyse ermöglicht eine unerwartete α‐Oxidation zyklischer Ketone mit 1,4‐Benzochinonen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804445] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Grigory A. Shevchenko
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Barry Oppelaar
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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30
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An Unexpected α‐Oxidation of Cyclic Ketones with 1,4‐Benzoquinone by Enol Catalysis. Angew Chem Int Ed Engl 2018; 57:10756-10759. [DOI: 10.1002/anie.201804445] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Indexed: 12/24/2022]
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31
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Spanka M, Schneider C. Phosphoric Acid Catalyzed Aldehyde Addition to in Situ Generated o-Quinone Methides: An Enantio- and Diastereoselective Entry toward cis-3,4-Diaryl Dihydrocoumarins. Org Lett 2018; 20:4769-4772. [DOI: 10.1021/acs.orglett.8b01865] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Matthias Spanka
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Deutschland
| | - Christoph Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Deutschland
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32
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Hartrampf N, Winter N, Pupo G, Stoltz BM, Trauner D. Total Synthesis of the Norhasubanan Alkaloid Stephadiamine. J Am Chem Soc 2018; 140:8675-8680. [PMID: 29889502 DOI: 10.1021/jacs.8b01918] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(+)-Stephadiamine is an unusual alkaloid isolated from the vine Stephania japonica. It features a norhasubanan skeleton, and contains two adjacent α-tertiary amines, which renders it an attractive synthetic target. Here, we present the first total synthesis of stephadiamine, which hinges on an efficient cascade reaction to implement the aza[4.3.3]propellane core of the alkaloid. The α-aminolactone moiety in a highly hindered position was installed via Tollens reaction and Curtius rearrangement. Useful building blocks for the asymmetric synthesis of morphine and (nor)hasubanan alkaloids are introduced.
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Affiliation(s)
- Nina Hartrampf
- Department of Chemistry , University of Munich , Butenandtstraße 5-13 , Munich 81377 , Germany
| | - Nils Winter
- Department of Chemistry , University of Munich , Butenandtstraße 5-13 , Munich 81377 , Germany
| | - Gabriele Pupo
- Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Dirk Trauner
- Department of Chemistry , University of Munich , Butenandtstraße 5-13 , Munich 81377 , Germany.,Department of Chemistry , New York University , 100 Washington Square East, Room 712 , New York , New York 10003 , United States
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33
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Lee JTD, Zhao Y. Direct Enantioselective α-Allylation of Unfunctionalized Cyclic Ketones with Alkynes through Pd-Amine Cooperative Catalysis. Chemistry 2018; 24:9520-9524. [DOI: 10.1002/chem.201802273] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Jin Tu Danence Lee
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Yu Zhao
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
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34
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Mitra R, Niemeyer J. Dual Brønsted-acid Organocatalysis: Cooperative Asymmetric Catalysis with Combined Phosphoric and Carboxylic Acids. ChemCatChem 2018. [DOI: 10.1002/cctc.201701698] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Raja Mitra
- Institute of Organic Chemistry; Department of Chemistry; University of Duisburg-Essen; Universitätsstrasse 7 45141 Essen Germany
| | - Jochen Niemeyer
- Institute of Organic Chemistry; Department of Chemistry; University of Duisburg-Essen; Universitätsstrasse 7 45141 Essen Germany
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35
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Parmar D, Sugiono E, Raja S, Rueping M. Addition and Correction to Complete Field Guide to Asymmetric BINOL-Phosphate Derived Brønsted Acid and Metal Catalysis: History and Classification by Mode of Activation; Brønsted Acidity, Hydrogen Bonding, Ion Pairing, and Metal Phosphates. Chem Rev 2017; 117:10608-10620. [DOI: 10.1021/acs.chemrev.7b00197] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Cano R, Zakarian A, McGlacken GP. Direct Asymmetric Alkylation of Ketones: Still Unconquered. Angew Chem Int Ed Engl 2017; 56:9278-9290. [PMID: 28497890 DOI: 10.1002/anie.201703079] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 04/27/2017] [Indexed: 01/07/2023]
Abstract
The alkylation of ketones is taught at basic undergraduate level. In many cases this transformation leads to the formation of a new stereogenic center. However, the apparent simplicity of the transformation is belied by a number of problems. So much so, that a general method for the direct asymmetric alkylation of ketones remains an unmet target. Despite the advancement of organocatalysis and transition-metal catalysis, neither field has provided an adequate solution. Indeed, even use of an efficient and general stoichiometric chiral reagent has yet to be reported. Herein we describe the state-of-the-art in terms of direct alkylation reactions of some carbonyl groups. We outline the limited progress that has been made with ketones, and potential routes towards ultimately achieving a widely applicable methodology for the asymmetric alkylation of ketones.
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Affiliation(s)
- Rafael Cano
- Department of Chemistry, University College Cork, Cork, Ireland.,Analytical and Biological Chemistry Research Facility, University College Cork, Cork, Ireland
| | - Armen Zakarian
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Gerard P McGlacken
- Department of Chemistry, University College Cork, Cork, Ireland.,Analytical and Biological Chemistry Research Facility, University College Cork, Cork, Ireland
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37
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Cano R, Zakarian A, McGlacken GP. Direkte asymmetrische Alkylierung von Ketonen: noch immer ein unerreichtes Ziel. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703079] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Rafael Cano
- Department of Chemistry; University College Cork; Cork Irland
- Analytical and Biological Chemistry Research Facility; University College Cork; Cork Irland
| | - Armen Zakarian
- Department of Chemistry and Biochemistry; University of California; Santa Barbara CA 93106 USA
| | - Gerard P. McGlacken
- Department of Chemistry; University College Cork; Cork Irland
- Analytical and Biological Chemistry Research Facility; University College Cork; Cork Irland
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38
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Kawasaki M, Kuroyanagi S, Ito T, Morita H, Tanaka Y, Toyooka N. Synthesis and odor properties of Phantolide analogues. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Berkes B, Ozsváth K, Molnár L, Gáti T, Holczbauer T, Kardos G, Soós T. Expedient and Diastereodivergent Assembly of Terpenoid Decalin Subunits having Quaternary Stereocenters through Organocatalytic Robinson Annulation of Nazarov Reagent. Chemistry 2016; 22:18101-18106. [DOI: 10.1002/chem.201604541] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Barbara Berkes
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Kristóf Ozsváth
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Laura Molnár
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry; Záhony Street 7 1031 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - György Kardos
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
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40
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Pupo G, Properzi R, List B. Asymmetric Catalysis with CO2 : The Direct α-Allylation of Ketones. Angew Chem Int Ed Engl 2016; 55:6099-102. [PMID: 27071633 DOI: 10.1002/anie.201601545] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Indexed: 11/10/2022]
Abstract
Quaternary stereocenters are found in numerous bioactive molecules. The Tsuji-Trost reaction has proven to be a powerful C-C bond forming process, and, at least in principle, should be well suited to access quaternary stereocenters via the α-allylation of ketones. However, while indirect approaches are known, the direct, catalytic asymmetric α-allylation of branched ketones has been elusive until today. By combining "enol catalysis" with the use of CO2 as a formal catalyst for asymmetric catalysis, we have now developed a solution to this problem: we report a direct, highly enantioselective and highly atom-economic Tsuji-Trost allylation of branched ketones with allylic alcohol. Our reaction delivers products bearing quaternary stereocenters with high enantioselectivity and water as the sole by-product. We expect our methodology to be of utility in asymmetric catalysis and inspire the design of other highly atom-economic transformations.
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Affiliation(s)
- Gabriele Pupo
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Roberta Properzi
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany.
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41
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Pupo G, Properzi R, List B. Asymmetrische Katalyse mit CO
2
: Die direkte α‐Allylierung von Ketonen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601545] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gabriele Pupo
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Roberta Properzi
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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42
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Zhang LD, Zhong LR, Xi J, Yang XL, Yao ZJ. Enantioselective Total Synthesis of Lycoposerramine-Z Using Chiral Phosphoric Acid Catalyzed Intramolecular Michael Addition. J Org Chem 2016; 81:1899-904. [DOI: 10.1021/acs.joc.5b02723] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Lan-De Zhang
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing National
Laboratory of Microstructures, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Lin-Rui Zhong
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing National
Laboratory of Microstructures, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Jie Xi
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing National
Laboratory of Microstructures, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Xiao-Liang Yang
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing National
Laboratory of Microstructures, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Zhu-Jun Yao
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing National
Laboratory of Microstructures, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
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43
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Yang X, Toste FD. Asymmetric addition of α-branched cyclic ketones to allenamides catalyzed by a chiral phosphoric acid. Chem Sci 2016; 7:2653-2656. [PMID: 27990248 PMCID: PMC5155590 DOI: 10.1039/c5sc04202j] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Asymmetric addition of unactivated α-branched cyclic ketones to allenamides catalyzed by a chiral phosphoric acid catalyst, generates an all-carbon quaternary stereocenter with broad substrate scope and high enantioselectivity.
We describe the asymmetric addition of unactivated α-branched cyclic ketones to allenamides catalyzed by a chiral phosphoric acid, generating an all-carbon quaternary stereocenter with broad substrate scope and high enantioselectivity. The products are easily transformed into their corresponding 1,5- and 1,4-ketoaldehyde derivatives, which are both important building blocks in organic synthesis.
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Affiliation(s)
- Xiaoyu Yang
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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44
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Romanini S, Galletti E, Caruana L, Mazzanti A, Himo F, Santoro S, Fochi M, Bernardi L. Catalytic Asymmetric Reactions of 4-Substituted Indoles with Nitroethene: A Direct Entry to Ergot Alkaloid Structures. Chemistry 2015; 21:17578-82. [PMID: 26486074 PMCID: PMC4832839 DOI: 10.1002/chem.201502655] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Indexed: 12/30/2022]
Abstract
A domino Friedel-Crafts/nitro-Michael reaction between 4-substituted indoles and nitroethene is presented. The reaction is catalyzed by BINOL-derived phosphoric acid catalysts, and delivers the corresponding 3,4-ring-fused indoles with very good results in terms of yields and diastereo- and enantioselectivities. The tricyclic benzo[cd]indole products bear a nitro group at the right position to serve as precursors of ergot alkaloids, as demonstrated by the formal synthesis of 6,7-secoagroclavine from one of the adducts. DFT calculations suggest that the outcome of the reaction stems from the preferential evolution of a key nitronic acid intermediate through a nucleophilic addition pathway, rather than to the expected "quenching" through protonation.
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Affiliation(s)
- Simone Romanini
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Emilio Galletti
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Lorenzo Caruana
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Andrea Mazzanti
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm (Sweden)
| | - Stefano Santoro
- Department of Chemistry, Biology and Biotechnology, University of Perugia, V. Elce di Sotto 8, 06123 Perugia (Italy).
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy).
| | - Luca Bernardi
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy).
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45
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Burns AR, Madec AGE, Low DW, Roy ID, Lam HW. Enantioselective synthesis of bicyclo[3.n.1]alkanes by chiral phosphoric acid-catalyzed desymmetrizing Michael cyclizations. Chem Sci 2015; 6:3550-3555. [PMID: 29511516 PMCID: PMC5659222 DOI: 10.1039/c5sc00753d] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 04/12/2015] [Indexed: 12/16/2022] Open
Abstract
2,2-Disubstituted cyclic 1,3-diketones containing a tethered electron-deficient alkene undergo chiral phosphoric acid-catalyzed desymmetrizing Michael cyclizations to give bridged bicyclic products in high enantioselectivities. Both bicyclo[3.2.1]octanes and bicyclo[3.3.1]nonanes are accessible using this methodology.
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Affiliation(s)
- Alan R Burns
- EaStCHEM , School of Chemistry , University of Edinburgh , Joseph Black Building, The King's Buildings, David Brewster Road , Edinburgh , EH9 3FJ , UK
- School of Chemistry , University of Nottingham , University Park , Nottingham , NG7 2RD , UK .
| | - Amaël G E Madec
- School of Chemistry , University of Nottingham , University Park , Nottingham , NG7 2RD , UK .
| | - Darryl W Low
- EaStCHEM , School of Chemistry , University of Edinburgh , Joseph Black Building, The King's Buildings, David Brewster Road , Edinburgh , EH9 3FJ , UK
| | - Iain D Roy
- EaStCHEM , School of Chemistry , University of Edinburgh , Joseph Black Building, The King's Buildings, David Brewster Road , Edinburgh , EH9 3FJ , UK
| | - Hon Wai Lam
- EaStCHEM , School of Chemistry , University of Edinburgh , Joseph Black Building, The King's Buildings, David Brewster Road , Edinburgh , EH9 3FJ , UK
- School of Chemistry , University of Nottingham , University Park , Nottingham , NG7 2RD , UK .
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46
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Kenny R, Liu F. Trifunctional Organocatalysts: Catalytic Proficiency by Cooperative Activation. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500179] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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47
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Yang X, Toste FD. Direct asymmetric amination of α-branched cyclic ketones catalyzed by a chiral phosphoric acid. J Am Chem Soc 2015; 137:3205-8. [PMID: 25719604 DOI: 10.1021/jacs.5b00229] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Here we report the direct asymmetric amination of α-substituted cyclic ketones catalyzed by a chiral phosphoric acid, yielding products with a N-containing quaternary stereocenter in high yields and excellent enantioselectivities. Kinetic resolution of the starting ketone was also found to occur on some of the substrates under milder conditions, providing enantioenriched α-branched ketones, another important building block in organic synthesis. The utility of this methodology was demonstrated in the short synthesis of (S)-ketamine, the more active enantiomer of this versatile pharmaceutical.
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Affiliation(s)
- Xiaoyu Yang
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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48
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Liu S, Tong M, Yu Y, Xie H, Li H, Wang W. Construction of an all-carbon quaternary stereocenter by organocatalytic enantioselective α-functionalization of α-substituted β-ketocarbonyls with electron deficient vinylarenes. Chem Commun (Camb) 2015; 51:11221-4. [DOI: 10.1039/c5cc03562g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An all-carbon quaternary stereocenter is efficiently constructed by a chiral amine catalyzed enantioselective α-functionalization of α-substituted β-ketocarbonyls with electro-deficient vinylarenes.
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Affiliation(s)
- Shizhou Liu
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- and State Key Laboratory of Bioengineering Reactor
- East China University of Science and Technology
- Shanghai 200237
| | - Mengchao Tong
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- and State Key Laboratory of Bioengineering Reactor
- East China University of Science and Technology
- Shanghai 200237
| | - Yang Yu
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- and State Key Laboratory of Bioengineering Reactor
- East China University of Science and Technology
- Shanghai 200237
| | - Hexin Xie
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- and State Key Laboratory of Bioengineering Reactor
- East China University of Science and Technology
- Shanghai 200237
| | - Hao Li
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- and State Key Laboratory of Bioengineering Reactor
- East China University of Science and Technology
- Shanghai 200237
| | - Wei Wang
- Shanghai Key Laboratory of New Drug Design
- School of Pharmacy
- and State Key Laboratory of Bioengineering Reactor
- East China University of Science and Technology
- Shanghai 200237
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