1
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Yang DS, Chen XL, Wu CY, Tang BC, Xiao YC, Wu YD, Wu AX. Synthesis of β,β-Dithioketones by Merging C-C and C-S Bond Cleavage in [1 + 1 + 1 + 1 + 1 + 1] Annulation. Org Lett 2024; 26:4340-4345. [PMID: 38743916 DOI: 10.1021/acs.orglett.4c01364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
An unconventional [1 + 1 + 1 + 1 + 1 + 1] annulation process was developed for the construction of β,β-dithioketones by merging C-C and C-S bond cleavage. In this reaction, rongalite concurrently served as triple C1 units, dual sulfur(II) synthons, and a reductant for the first time. Mechanism investigation indicated that the reaction involved the self-mediated valence state change of rongalite. By performing this step-economical method, the challenging construction of C5-substituted 1,3-dithiane can be achieved under mild and simple conditions.
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Affiliation(s)
- Dong-Sheng Yang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
| | - Xiang-Long Chen
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
| | - Chun-Yan Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
| | - Bo-Cheng Tang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - Yong-Cheng Xiao
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
| | - Yan-Dong Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
| | - An-Xin Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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2
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Can Üsküp H, Yıldız T, Onar HÇ, Hasdemir B. Synthesis of Novel 1,4-Diketone Derivatives and Their Further Cyclization. ACS OMEGA 2023; 8:14047-14052. [PMID: 37091374 PMCID: PMC10116510 DOI: 10.1021/acsomega.3c00610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/29/2023] [Indexed: 05/03/2023]
Abstract
One of the important reactions to obtain a new carbon-carbon bond is the Stetter reaction, which is generally via a nucleophilic catalyst like cyanide or thiazolium-NHC catalysts. In particular, 1,4-diketones with very functional properties are obtained by the Stetter reaction with the intermolecular reaction of an aldehyde and an α,β-unsaturated ketone. In this study, we synthesized new derivatives (substituted arenoxy) of 1,4-diketone compounds (2a-2n) with useful features by a new version of the Stetter reaction method. In our work, arenoxy benzaldehyde derivatives with different structures as the Michael donor and methyl vinyl ketone as the Michael acceptor were used for the intermolecular Stetter reaction. The reaction was catalyzed by 3-benzyl-5-(2-hydroxyethyl)-4-methylthiazolium chloride (3b), using triethylamine for the basic medium and dimethyl sulfoxide as the solvent. As a result, some novel arenoxy-substituted 1,4-diketones were gained with good yields at room temperature within 24 h through an intermolecular Stetter reaction. In addition, new furan and pyrrole derivatives were prepared by performing the cyclization reaction with one of the obtained new diketone compounds.
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3
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Luo J, Deng Y, Deng T, Deng L. Catalytic Enantioconvergent Conjugate Addition of Organosilanes via a Strategy of Fluorodesilylation. J Am Chem Soc 2022; 144:23264-23270. [PMID: 36512757 DOI: 10.1021/jacs.2c10777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Fluorodesilylation is a widely used strategy to activate organosilanes as nucleophiles for the development of organic transformations. To date, highly enantioselective catalytic fluorodesilylations have been limited to the activation of silyl ethers, organosilanes bearing specific substituents such as trifluoromethyl and cyanide, allylsilanes, and acylsilanes. However, the catalytic enantioconvergent reaction of racemic organosilanes bearing variable substituents via fluorodesilylation has been rarely reported. We report an unprecedented enantioconvergent fluorodesilylation of racemic organosilanes bearing various substituents with a chiral ammonium fluoride. Notably, these results demonstrated that the fluorodesilylation could potentially be a general strategy for the development of catalytic asymmetric reactions of racemic organosilanes.
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Affiliation(s)
- Jisheng Luo
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang Province, China
| | - Yu Deng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang Province, China
| | - Tianran Deng
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110, United States
| | - Li Deng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, 600 Dunyu Road, Hangzhou 310030, Zhejiang Province, China
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4
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Wang L, Lin S, Santos E, Pralat J, Spotton K, Sharma A. Boron-Promoted Deprotonative Conjugate Addition: Geminal Diborons as Soft Pronucleophiles and Acyl Anion Equivalents. J Org Chem 2022; 87:9896-9906. [PMID: 35819798 PMCID: PMC9509689 DOI: 10.1021/acs.joc.2c00914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Conjugate addition of α-boron-stabilized carbanions is an underexplored reaction modality. Existing methods require deborylation of geminal di-/triboryl alkanes and/or the presence of additional activating groups. We report the 1,4-addition of α,α-diboryl carbanions generated via deprotonation of the corresponding geminal diborons. The methodology provided a general route to highly substituted and synthetically useful γ,γ-diboryl ketones. The development of geminal diborons as soft pronucleophiles also enabled their use as acyl anion equivalents via a one-pot tandem conjugate addition-oxidation sequence.
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Affiliation(s)
- Lucia Wang
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Shengjia Lin
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Emmanuel Santos
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Jenna Pralat
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Kaylyn Spotton
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Abhishek Sharma
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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5
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Pearl ES, Fellner DMJ, Söhnel T, Furkert DP, Brimble MA. A Highly Efficient
N
‐Mesityl Thiazolylidene for the Aliphatic Stetter Reaction: Stereoelectronic Quantification for Comparison of N‐Heterocyclic Carbene Organocatalysts. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Esperanza S. Pearl
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
| | - Daniel M. J. Fellner
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
| | - Daniel P. Furkert
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery 3 Symonds St Auckland 1010 New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery 3 Symonds St Auckland 1010 New Zealand
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6
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Shi H, Dixon DJ. Dithiane-directed Rh(iii)-catalyzed amidation of unactivated C(sp 3)-H bonds. Chem Sci 2019; 10:3733-3737. [PMID: 31015917 PMCID: PMC6457195 DOI: 10.1039/c8sc05225e] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 02/18/2019] [Indexed: 11/21/2022] Open
Abstract
An oxidant-free Rh(iii)-catalyzed direct amidation of alkyl dithianes via C(sp3)-H bond activation utilizing diverse and robust dioxazolone reagents is reported. The reaction hinges on use of a Cp*Rh(iii) complex in combination with an essential amino-carboxylate additive to generate usefully protected 1,3-aminoaldehyde derivatives. The scalability of the reaction was demonstrated as was a series of downstream product functionalizations, including dithiane deprotection, anion alkylation and reductive desulfurization, highlighting the general applicability of this transformation in the synthesis of novel scaffolds and building blocks.
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Affiliation(s)
- Heyao Shi
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford , OX1 3TA , UK .
| | - Darren J Dixon
- Chemistry Research Laboratory , 12 Mansfield Road , Oxford , OX1 3TA , UK .
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7
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Kagoshima H, Muraishi K, Tsuchida S, Shiraishi T, Takimoto R. Conjugate Addition of 2-Tributylstannyl-1,3-dithiane to α, β-Unsaturated Ketones by the Combined Use of Cu(OTf) 2 and Et 3SiOTf. CHEM LETT 2019. [DOI: 10.1246/cl.180957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Hirotaka Kagoshima
- Center for Instrumental Analysis, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - Kazuya Muraishi
- Center for Instrumental Analysis, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - Shusei Tsuchida
- Center for Instrumental Analysis, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - Tatsuki Shiraishi
- Center for Instrumental Analysis, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
| | - Ryuta Takimoto
- Center for Instrumental Analysis, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
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8
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Min D, Yuan X, Liu T, Liu J, Tang S. Fe-catalyzed dithiane radical induced C−S bond activation−addition to α, β-unsaturated ketones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Deng Min
- School of Pharmacy; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Xinyu Yuan
- School of Pharmacy; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Teng Liu
- School of Pharmacy; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Jian Liu
- School of Pharmacy; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Shouchu Tang
- School of Pharmacy; Lanzhou University; Lanzhou 730000 People's Republic of China
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
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9
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Liang Y, Lai J, Liu T, Tang S. Direct Regioselective [3 + 2]-Cyclization Reactions of Ambivalent Electrophilic/Nucleophilic β-Chlorovinyl Dithianes: Access to Cyclopentene Derivatives. Org Lett 2016; 18:5086-5089. [PMID: 27624691 DOI: 10.1021/acs.orglett.6b02536] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The highly regioselective and operationally straightforward [3 + 2] cyclizations of β-chlorovinyl dithianes with α,β-unsaturated carbonyl compounds have been developed. This protocol provides direct access to highly functionalized cyclopentenes with perfect chemo- and regioselectivities under extremely mild reaction conditions. In particular, the unprecedented cyclization allows for the selective preparation of hydroxylated cyclopentenes.
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Affiliation(s)
- Yongping Liang
- School of Pharmacy and ‡State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Junshan Lai
- School of Pharmacy and ‡State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Teng Liu
- School of Pharmacy and ‡State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Shouchu Tang
- School of Pharmacy and ‡State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
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10
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Rotsides CZ, Woerpel KA. Insertion Reactions of Silacyclopropanes: Evidence for a Radical-Based Mechanism. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christina Z. Rotsides
- Department
of Chemistry, New York University, New York, New York 10003, United States
| | - K. A. Woerpel
- Department
of Chemistry, New York University, New York, New York 10003, United States
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11
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Zhang QB, Jia WL, Ban YL, Zheng Y, Liu Q, Wu LZ. Autoxidation/Aldol Tandem Reaction of 2-Oxindoles with Ketones: A Green Approach for the Synthesis of 3-Hydroxy-2-Oxindoles. Chemistry 2016; 22:2595-8. [PMID: 26714924 DOI: 10.1002/chem.201504282] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Indexed: 01/27/2023]
Abstract
In the presence of tetrabutylammonium fluoride and molecular sieves (MS) 4 Å in DMF, an efficient autoxidation reaction of 2-oxindoles with ketones under air at room temperature has been developed. This approach may provide a green, practical, and metal-free protocol for a wide range of biologically important 3-hydroxy-3-(2-oxo-alkyl)-2-oxindoles.
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Affiliation(s)
- Qing-Bao Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Wen-Liang Jia
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yong-Liang Ban
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yong Zheng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Qiang Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, P. R. China
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12
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Kondoh A, Oishi M, Takeda T, Terada M. Enantioselective Addition of a 2‐Alkoxycarbonyl‐1,3‐dithiane to Imines Catalyzed by a Bis(guanidino)iminophosphorane Organosuperbase. Angew Chem Int Ed Engl 2015; 54:15836-9. [DOI: 10.1002/anie.201508178] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
| | - Masafumi Oishi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
| | - Tadahiro Takeda
- Process Technology Research Laboratories, Daiichi Sankyo Co., Ltd, Edogawa‐ku, Tokyo 134‐8630 (Japan)
| | - Masahiro Terada
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
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13
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Kondoh A, Oishi M, Takeda T, Terada M. Enantioselective Addition of a 2‐Alkoxycarbonyl‐1,3‐dithiane to Imines Catalyzed by a Bis(guanidino)iminophosphorane Organosuperbase. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508178] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
| | - Masafumi Oishi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
| | - Tadahiro Takeda
- Process Technology Research Laboratories, Daiichi Sankyo Co., Ltd, Edogawa‐ku, Tokyo 134‐8630 (Japan)
| | - Masahiro Terada
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan)
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14
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Kawaguchi SI, Minamida Y, Okuda T, Sato Y, Saeki T, Yoshimura A, Nomoto A, Ogawa A. Photoinduced Synthesis ofP-Perfluoroalkylated Phosphines from Triarylphosphines and Their Application in the Copper-Free Cross-Coupling of Acid Chlorides and Terminal Alkynes. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500294] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Zhong F, Pöthig A, Bach T. Synergistic Stereocontrol in the Enantioselective Ruthenium-Catalyzed Sulfoxidation of Spirodithiolane-Indolones. Chemistry 2015; 21:10310-3. [DOI: 10.1002/chem.201501780] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Indexed: 11/09/2022]
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16
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Unoh Y, Hirano K, Satoh T, Miura M. Rhodium(III)-Catalyzed Oxidative Alkenylation of 1,3-Dithiane-Protected Arenecarbaldehydes via Regioselective C–H Bond Cleavage. Org Lett 2015; 17:704-7. [DOI: 10.1021/ol503722r] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yuto Unoh
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Koji Hirano
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tetsuya Satoh
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- JST, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Masahiro Miura
- Department
of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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17
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Massolo E, Benaglia M, Genoni A, Annunziata R, Celentano G, Gaggero N. Stereoselective reaction of 2-carboxythioesters-1,3-dithiane with nitroalkenes: an organocatalytic strategy for the asymmetric addition of a glyoxylate anion equivalent. Org Biomol Chem 2015; 13:5591-6. [DOI: 10.1039/c5ob00492f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Under mild reaction conditions γ-nitro-β-aryl-α-keto esters with up to 92% ee were obtained, realizing a formal catalytic stereoselective conjugate addition of the glyoxylate anion synthon.
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Affiliation(s)
- Elisabetta Massolo
- Dipartimento di Chimica
- Universita’ degli Studi di Milano
- I-20133 Milano
- Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica
- Universita’ degli Studi di Milano
- I-20133 Milano
- Italy
| | - Andrea Genoni
- Dipartimento di Chimica
- Universita’ degli Studi di Milano
- I-20133 Milano
- Italy
| | - Rita Annunziata
- Dipartimento di Chimica
- Universita’ degli Studi di Milano
- I-20133 Milano
- Italy
| | - Giuseppe Celentano
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- Milano
- Italy
| | - Nicoletta Gaggero
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- Milano
- Italy
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18
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Yucel B, Walsh PJ. Reversed-Polarity Synthesis of Diaryl Ketones through Palladium-Catalyzed Direct Arylation of 2-Aryl-1,3-dithianes. Adv Synth Catal 2014; 356:3659-3667. [PMID: 26185491 PMCID: PMC4500739 DOI: 10.1002/adsc.201400695] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An umpolung approach to the synthesis of diaryl ketones has been developed based on in situ generation of acyl anion equivalents and their catalytic arylation. This method entails the base promoted palladium catalyzed direct C-H arylation of 2 The resulting 2,2-diaryl-1,3-dithianes with aryl bromides. Use of MN(SiMe3)2 (M=Li, Na) base results in reversible deprotonation of the weakly acidic dithiane. In the presence of a Pd(NiXantphos)-based catalyst and aryl bromide, cross-coupling of the metallated 2-aryl-1,3-dithiane takes place under mild conditions (2 h at rt) with yields as high as 96%. The resulting 2,2-diaryl-1,3-dithianes were converted into diaryl ketones by either molecular iodine, N-bromo succinimide (NBS) or Selectfluor in the presence of water. The dithiane arylation/hydrolysis can be performed in a one-pot procedure to yield a good to excellent yields. This method is suitable for rapid and large-scale synthesis of diaryl ketones. A one-pot preparation of anti-cholesterol drug fenofibrate (TriCor®) has been achieved on 10.0 mmol scale in 86% yield.
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Affiliation(s)
- Baris Yucel
- Istanbul Technical University, Science Faculty, Department of Chemistry, Maslak 34469, Istanbul, Turkey
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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