1
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Li Z, Fan L, Liu G. Recent advances in stereoselective construction of fluorinated quaternary carbon centers from fluorinated compounds. Org Biomol Chem 2024; 22:4592-4612. [PMID: 38771632 DOI: 10.1039/d4ob00457d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
There are many fluorinated quaternary carbon structural units in pharmaceuticals and bioactive compounds. Organic chemists are interested in the stereoselective synthesis of fluorinated quaternary carbon structural units. Constructing a fluorinated quaternary carbon stereocenter can be achieved directly and efficiently by the asymmetric catalytic reaction of fluorinated compounds as substrates. This approach aims to construct fluorinated quaternary carbon stereocenters while diversifying the types of fluorinated compounds. This review introduces a series of reactions for synthesizing fluorinated quaternary carbon chiral centers through asymmetric organic catalysis and transition metal catalysis, including alkylation, arylation, Mannich, Michael addition, and allylation reactions. This work will contribute to the development of the synthesis of fluorinated quaternary carbon chiral center-containing compounds in the future.
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Affiliation(s)
- Zongwei Li
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, College of Chemistry and Chemical Engineering, Inner Mongolia University, 24 Zhaojun Road, Hohhot 010030, China.
| | - Lin Fan
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, College of Chemistry and Chemical Engineering, Inner Mongolia University, 24 Zhaojun Road, Hohhot 010030, China.
| | - Guodu Liu
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, College of Chemistry and Chemical Engineering, Inner Mongolia University, 24 Zhaojun Road, Hohhot 010030, China.
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2
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Usman FO, Gogoi AR, Mixdorf JC, Gutierrez O, Nguyen HM. Rhodium-Catalyzed Asymmetric Synthesis of 1,2-Disubstituted Allylic Fluorides. Angew Chem Int Ed Engl 2023; 62:e202314843. [PMID: 37856668 PMCID: PMC11069351 DOI: 10.1002/anie.202314843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 10/21/2023]
Abstract
Although there are many methods for the asymmetric synthesis of monosubstituted allylic fluorides, construction of enantioenriched 1,2-disubstituted allylic fluorides has not been reported. To address this gap, we report an enantioselective synthesis of 1,2-disubstituted allylic fluorides using chiral diene-ligated rhodium catalyst, Et3 N ⋅ 3HF as a source of fluoride, and Morita Baylis Hillman (MBH) trichloroacetimidates. Kinetic studies show that one enantiomer of racemic MBH substrate reacts faster than the other. Computational studies reveal that both syn and anti π-allyl complexes are formed upon ionization of allylic substrate, and the syn complexes are slightly energetically favorable. This is in contrast to our previous observation for formation of monosubstituted π-allyl intermediates, in which the syn π-allyl conformation is strongly preferred. In addition, the presence of an electron-withdrawing group at C2 position of racemic MBH substrate renders 1,2-disubstituted π-allyl intermediate formation endergonic and reversible. To compare, formation of monosubstituted π-allyl intermediates was exergonic and irreversible. DFT calculations and kinetic studies support a dynamic kinetic asymmetric transformation process wherein the rate of isomerization of the 1,2-disubstituted π-allylrhodium complexes is faster than that of fluoride addition onto the more reactive intermediate. The 1,2-disubstituted allylic fluorides were obtained in good yields, enantioselectivity, and branched selectivity.
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Affiliation(s)
- Fuad O Usman
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA
| | - Achyut R Gogoi
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Jason C Mixdorf
- Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA
| | - Osvaldo Gutierrez
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Hien M Nguyen
- Department of Chemistry, Wayne State University, Detroit, MI 48202, USA
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3
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Pan B, Shi Y, Tian Y, Zhou Y, Zhou J, Yu J. Synthesis of Multifunctional
α
,
α
‐Difluoroketones through Allylic Alkylation of Difluoroenoxysilanes with MBH Carbonates. Chem Asian J 2020; 15:4028-4032. [DOI: 10.1002/asia.202001145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 10/19/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Bo‐Wen Pan
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - Yang Shi
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - You‐Ping Tian
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - Ying Zhou
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
| | - Jian Zhou
- College of Pharmacy Guizhou University of Traditional Chinese Medicine Guiyang 550025 P. R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai 200062 P. R. China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, CAS Shanghai 200032 P.R. China
| | - Jin‐Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai 200062 P. R. China
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4
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Halder P, Pol MD, Ahire MM, Mhaske SB. Construction of unique SCF 3-containing building blocks via allylic alkylation of Morita-Baylis-Hillman adducts. Org Biomol Chem 2020; 18:2085-2093. [PMID: 32115601 DOI: 10.1039/d0ob00104j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lewis base-catalyzed allylic alkylation of Morita-Baylis-Hillman adducts with α-SCF3 ketones has been demonstrated. The developed strategy provides efficient access to a series of highly functionalized scaffolds featuring trifluoromethanesufinyl motif on a stereogenic carbon.
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Affiliation(s)
- Priyanka Halder
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Pune - 411008, India.
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5
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Liu X, Jin S, Zhang W, Liu Q, Zheng C, You S. Sequence‐Dependent Stereodivergent Allylic Alkylation/Fluorination of Acyclic Ketones. Angew Chem Int Ed Engl 2020; 59:2039-2043. [DOI: 10.1002/anie.201912882] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Xi‐Jia Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shicheng Jin
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Wen‐Yun Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Qiang‐Qiang Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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6
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Liu X, Jin S, Zhang W, Liu Q, Zheng C, You S. Sequence‐Dependent Stereodivergent Allylic Alkylation/Fluorination of Acyclic Ketones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912882] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Xi‐Jia Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shicheng Jin
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Wen‐Yun Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Qiang‐Qiang Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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7
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He ZT, Jiang X, Hartwig JF. Stereodivergent Construction of Tertiary Fluorides in Vicinal Stereogenic Pairs by Allylic Substitution with Iridium and Copper Catalysts. J Am Chem Soc 2019; 141:13066-13073. [DOI: 10.1021/jacs.9b04440] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zhi-Tao He
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Xingyu Jiang
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John F. Hartwig
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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8
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Zhu Y, Mao Y, Mei H, Pan Y, Han J, Soloshonok VA, Hayashi T. Palladium-Catalyzed Asymmetric Allylic Alkylations of Colby Pro-Enolates with MBH Carbonates: Enantioselective Access to Quaternary C-F Oxindoles. Chemistry 2018; 24:8994-8998. [PMID: 29683211 DOI: 10.1002/chem.201801670] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Indexed: 12/21/2022]
Abstract
Owing to the innovative applications of fluorinated compounds in many areas of technology and medicine, methods for the preparation of C-F quaternary fluorine containing compounds are in extremely high demand. Here, we report the discovery of a general procedure for an SN 2 reaction catalyzed by Pd/Ding-SKP-type ligands, and that occurs between Colby pro-enolates with MBH carbonates to afford the corresponding products featuring two consecutive stereogenic carbons, including a C-F quaternary stereogenic center. The reactions readily occur at ambient temperatures with high chemical yields and in excellent chemo-, diastereo- and enantioselective manners. This practically attractive stereochemical outcome, coupled with the operational simplicity and structural generality, bodes well for the synthetic application of this process in the preparation of a novel class of biologically relevant fluorine-containing compounds.
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Affiliation(s)
- Yi Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210093, China
| | - Yu Mao
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210093, China
| | - Haibo Mei
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210093, China
| | - Yi Pan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210093, China
| | - Jianlin Han
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Nanjing University, Nanjing, 210093, China
| | - Vadim A Soloshonok
- Department of Organic Chemistry I, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel Lardizábal 3, 20018, San Sebastián, Spain.,IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013, Bilbao, Spain
| | - Tamio Hayashi
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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9
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Zhu Y, Han J, Wang J, Shibata N, Sodeoka M, Soloshonok VA, Coelho JAS, Toste FD. Modern Approaches for Asymmetric Construction of Carbon-Fluorine Quaternary Stereogenic Centers: Synthetic Challenges and Pharmaceutical Needs. Chem Rev 2018; 118:3887-3964. [PMID: 29608052 DOI: 10.1021/acs.chemrev.7b00778] [Citation(s) in RCA: 414] [Impact Index Per Article: 69.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
New methods for preparation of tailor-made fluorine-containing compounds are in extremely high demand in nearly every sector of chemical industry. The asymmetric construction of quaternary C-F stereogenic centers is the most synthetically challenging and, consequently, the least developed area of research. As a reflection of this apparent methodological deficit, pharmaceutical drugs featuring C-F stereogenic centers constitute less than 1% of all fluorine-containing medicines currently on the market or in clinical development. Here we provide a comprehensive review of current research activity in this area, including such general directions as asymmetric electrophilic fluorination via organocatalytic and transition-metal catalyzed reactions, asymmetric elaboration of fluorine-containing substrates via alkylations, Mannich, Michael, and aldol additions, cross-coupling reactions, and biocatalytic approaches.
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Affiliation(s)
- Yi Zhu
- School of Chemistry and Chemical Engineering, State Key laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials , Nanjing University , 210093 Nanjing , China
| | - Jianlin Han
- School of Chemistry and Chemical Engineering, State Key laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials , Nanjing University , 210093 Nanjing , China
| | - Jiandong Wang
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials , Nagoya Institute of Technology , Gokiso, Showa-ku , Nagoya 466-8555 , Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials , Nagoya Institute of Technology , Gokiso, Showa-ku , Nagoya 466-8555 , Japan
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory , RIKEN, and RIKEN Center for Sustainable Resourse Science , 2-1 Hirosawa , Wako 351-0198 , Japan
| | - Vadim A Soloshonok
- Department of Organic Chemistry I, Faculty of Chemistry , University of the Basque Country UPV/EHU , 20018 San Sebastian , Spain.,IKERBASQUE, Basque Foundation for Science , 48011 Bilbao , Spain
| | - Jaime A S Coelho
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - F Dean Toste
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
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10
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Govender T, Arvidsson PI, Maguire GEM, Kruger HG, Naicker T. Enantioselective Organocatalyzed Transformations of β-Ketoesters. Chem Rev 2016; 116:9375-437. [PMID: 27463615 DOI: 10.1021/acs.chemrev.6b00156] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The β-ketoester structural motif continues to intrigue chemists with its electrophilic and nucleophilic sites. Proven to be a valuable tool within organic synthesis, natural product, and medicinal chemistry, reports on chiral β-ketoester molecular skeletons display a steady increase. With the reignition of organocatalysis in the past decade, asymmetric methods available for the synthesis of this structural unit has significantly expanded, making it one of the most exploited substrates for organocatalytic transformations. This review provides comprehensive information on the plethora of organocatalysts used in stereoselective organocatalyzed construction of β-ketoester-containing compounds.
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Affiliation(s)
- Thavendran Govender
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Per I Arvidsson
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa.,P. I. Arvidsson, Science for Life Laboratory, Drug Discovery and Development Platform and Division of Translational Medicine and Chemical Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet SE-171 77 Stockholm, Sweden
| | - Glenn E M Maguire
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
| | - Tricia Naicker
- Catalysis and Peptide Research Unit, University of KwaZulu Natal , Durban, 4001, South Africa
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11
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Catalytic asymmetric conjugate addition of α-fluoro β-ketophosphonates to nitroalkenes in the presence of nickel complexes. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.04.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Recent advances in asymmetric fluorination and fluoroalkylation reactions via organocatalysis. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Liu Q, Qiao B, Chin KF, Tan CH, Jiang Z. Asymmetric Michael Addition of 5 H-Oxazol-4-ones to Vinyl Sulfones: Stereoselective Synthesis of Monofluorinated Analogs of 2-Tertiary Hydroxyl-3-Methyl-Substituted Carboxylic Acidl Derivatives. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400649] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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14
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Chen W, Jing Z, Chin KF, Qiao B, Zhao Y, Yan L, Tan CH, Jiang Z. Catalytic Asymmetric Conjugate Addition of Mercaptans to β-Substituted-β-Trifluoromethyl Oxazolidinone Enoates: Access to Chiral Trifluoromethylated Tertiary Thioethers and Thiols. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301027] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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15
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Qiao B, Liu Q, Liu H, Yan L, Jiang Z. Asymmetric decarboxylative 1,4-addition of malonic acid half thioesters to vinyl sulfones: highly enantioselective synthesis of 3-monofluoromethyl-3-arylpropanoic esters. Chem Asian J 2014; 9:1252-6. [PMID: 24591040 DOI: 10.1002/asia.201400049] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Indexed: 11/09/2022]
Abstract
An asymmetric decarboxylative 1,4-addition of malonic acid half thioesters (MAHTs) to 2-aryl-substituted vinyl sulfones has been developed, yielding adducts with excellent enantioselectivity (up to 97 % ee). In view of tuning pKa values, a quinine-based benzyl-substituted thiourea was designed and demonstrated as the most efficient catalyst. The enantioselective synthesis of 3-monofluorinated analogues of 3-methyl indanone and (+)-turmerone has been accomplished from decarboxylative 1,4-addition adducts with satisfactory results.
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Affiliation(s)
- Baokun Qiao
- Institute of Chemical Biology, Henan University, Kaifeng, Henan, 475004 (P. R. China), Fax: (+86) 378-2864-665
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16
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Qiao B, Liu X, Duan S, Yan L, Jiang Z. Highly Enantioselective Organocatalytic α-Sulfenylation of Azlactones. Org Lett 2014; 16:672-5. [PMID: 24432722 DOI: 10.1021/ol403303k] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Baokun Qiao
- Institute of Chemical Biology and ‡Key Laboratory of Natural Medicine
and Immuno-Engineering
of Henan Province, Henan University, Kaifeng, Henan, China, 475004
| | - Xinfei Liu
- Institute of Chemical Biology and ‡Key Laboratory of Natural Medicine
and Immuno-Engineering
of Henan Province, Henan University, Kaifeng, Henan, China, 475004
| | - Shaobo Duan
- Institute of Chemical Biology and ‡Key Laboratory of Natural Medicine
and Immuno-Engineering
of Henan Province, Henan University, Kaifeng, Henan, China, 475004
| | - Lin Yan
- Institute of Chemical Biology and ‡Key Laboratory of Natural Medicine
and Immuno-Engineering
of Henan Province, Henan University, Kaifeng, Henan, China, 475004
| | - Zhiyong Jiang
- Institute of Chemical Biology and ‡Key Laboratory of Natural Medicine
and Immuno-Engineering
of Henan Province, Henan University, Kaifeng, Henan, China, 475004
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Jing Z, Liu J, Chin KF, Chen W, Tan CH, Jiang Z. Chiral Bicyclic Guanidine-Catalysed Conjugate Addition of α-Fluoro-β-Ketoesters to Cyclic Enones. Aust J Chem 2014. [DOI: 10.1071/ch14187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
By utilising a chiral bicyclic guanidine as catalyst and triethylamine as additive, the first asymmetric Michael addition of α-fluoro-β-ketoesters to various cyclic enones has been successfully developed, affording a variety of Michael adducts with potential synthetic utilities with satisfactory stereoselectivity (up to 94 % ee and 4.3 : 1 dr).
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