1
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Junk L, Kazmaier U. The Allylic Alkylation of Ketone Enolates. ChemistryOpen 2020; 9:929-952. [PMID: 32953384 PMCID: PMC7482671 DOI: 10.1002/open.202000175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/03/2020] [Indexed: 01/14/2023] Open
Abstract
The palladium-catalyzed allylic alkylation of non-stabilized ketone enolates was thought for a long time to be not as efficient as the analogous reactions of stabilized enolates, e. g. of malonates and β-ketoesters. The field has experienced a rapid development during the last two decades, with a range of new, highly efficient protocols evolved. In this review, the early developments as well as current methods and applications of palladium-catalyzed ketone enolate allylations will be discussed.
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Affiliation(s)
- Lukas Junk
- Organic Chemistry ISaarland UniversityCampus C4.266123SaarbrückenGermany
| | - Uli Kazmaier
- Organic Chemistry ISaarland UniversityCampus C4.266123SaarbrückenGermany
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2
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Tom MJ, Evans PA. Regioselective and Stereospecific Rhodium-Catalyzed Allylic Cyanomethylation with an Acetonitrile Equivalent: Construction of Acyclic β-Quaternary Stereogenic Nitriles. J Am Chem Soc 2020; 142:11957-11961. [PMID: 32486634 DOI: 10.1021/jacs.0c02316] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A highly regioselective and stereospecific rhodium-catalyzed cyanomethylation of tertiary allylic carbonates for the construction of acyclic β-quaternary stereogenic nitriles is described. This protocol represents the first example of a metal-catalyzed allylic substitution reaction using a triorganosilyl-stabilized acetonitrile anion, which permits access to several carbonyl derivatives that are challenging to prepare using conventional pronucleophiles. The synthetic utility of the stereospecific cyanomethylation is further exemplified through the construction of an intermediate utilized in the total synthesis of both (-)-epilaurene and (-)-α-cuparenone.
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Affiliation(s)
- Mai-Jan Tom
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston ON K7L 3N6, Canada
| | - P Andrew Evans
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston ON K7L 3N6, Canada.,Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, Hunan, P. R. of China
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3
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Pareek M, Sunoj RB. Energetics of Dynamic Kinetic Asymmetric Transformation in Suzuki–Miyaura Coupling. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Monika Pareek
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raghavan B. Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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4
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Tang SB, Tu HF, Zhang X, You SL. Rhodium-Catalyzed Asymmetric Allylic Dearomatization of β-Naphthols: Enantioselective Control of Prochiral Nucleophiles. Org Lett 2019; 21:6130-6134. [DOI: 10.1021/acs.orglett.9b02285] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sheng-Biao Tang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy
of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Hang-Fei Tu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy
of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy
of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy
of Sciences, 345 Lingling Lu, Shanghai 200032, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China
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5
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Bailey WD, Gagnon NL, Elwell CE, Cramblitt AC, Bouchey CJ, Tolman WB. Revisiting the Synthesis and Nucleophilic Reactivity of an Anionic Copper Superoxide Complex. Inorg Chem 2019; 58:4706-4711. [PMID: 30901201 DOI: 10.1021/acs.inorgchem.9b00090] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The addition of 1 equiv of KO2 and Kryptofix222 (Krypt) in CH3CN to a solution of LCu(CH3CN) [L = N, N'-bis(2,6-diisopropylphenyl)-2,6-pyridinecarboxamide] in tetrahydrofuran at -80 °C yielded [K(Krypt)][LCuO2], the enhanced stability of which enabled reexamination of its reactivity with 2-phenylpropionaldehyde (2-PPA). Mechanistic and product analysis studies revealed that [K(Krypt)][LCuO2] reacts with wet 2-PPA to form [LCuOH]-, which then deprotonates 2-PPA to yield the copper(II) enolate complex [LCu(OC═C(Me)Ph)]-. Acetophenone was observed upon workup of this complex or mixtures of KO2 and 2-PPA alone, in support of an alternative mechanism(s) to the one proposed previously involving an initial nucleophilic attack at the carbonyl group of 2-PPA.
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Affiliation(s)
- Wilson D Bailey
- Department of Chemistry , Washington University-St. Louis , One Brookings Drive, Campus Box 1134 , St. Louis , Missouri 63130-4899 , United States
| | - Nicole L Gagnon
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Courtney E Elwell
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Anna C Cramblitt
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Caitlin J Bouchey
- Department of Chemistry , Washington University-St. Louis , One Brookings Drive, Campus Box 1134 , St. Louis , Missouri 63130-4899 , United States.,Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - William B Tolman
- Department of Chemistry , Washington University-St. Louis , One Brookings Drive, Campus Box 1134 , St. Louis , Missouri 63130-4899 , United States.,Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
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6
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Turnbull BWH, Evans PA. Asymmetric Rhodium-Catalyzed Allylic Substitution Reactions: Discovery, Development and Applications to Target-Directed Synthesis. J Org Chem 2018; 83:11463-11479. [DOI: 10.1021/acs.joc.8b00583] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ben W. H. Turnbull
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston K7L 3N6, Canada
| | - P. Andrew Evans
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston K7L 3N6, Canada
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7
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Tang SB, Zhang X, Tu HF, You SL. Regio- and Enantioselective Rhodium-Catalyzed Allylic Alkylation of Racemic Allylic Alcohols with 1,3-Diketones. J Am Chem Soc 2018; 140:7737-7742. [PMID: 29799203 DOI: 10.1021/jacs.8b05126] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Highly regio- and enantioselective rhodium-catalyzed allylic alkylation of 1,3-diketones with racemic secondary allylic alcohols is reported. In the presence of a Rh-catalyst derived from the Carreira (P, olefin)-ligand and TFA as an additive, chiral branched α-allylated 1,3-diketones could be obtained in good to excellent yields, with excellent regio- and enantioselectivity ( b/ l > 19/1, 86-98% ee). The direct utilization of allyl alcohols as electrophiles represents an improvement from the viewpoint of an atom economy. Both aryl- and aliphatic-substituted allyl alcohols are suitable substrates with excellent reaction outcomes. This reaction features mild conditions, broad substrate scope, and readily available substrates.
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Affiliation(s)
- Sheng-Biao Tang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Xiao Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Hang-Fei Tu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Lu , Shanghai 200032 , China.,Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
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8
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Mizota I, Ueda C, Tesong Y, Tsujimoto Y, Shimizu M. Umpolung Reaction of α-Imino Thioesters and the Subsequent C-C Bond Formation with the Unexpected Alkylthio Rearrangement. Org Lett 2018; 20:2291-2296. [PMID: 29600708 DOI: 10.1021/acs.orglett.8b00639] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An umpolung reaction of the α-imino thioester was examined, and we found that α-imino thioesters were more effective substrates for the umpolung N-alkylation than conventional α-imino esters and they gave N-alkylated amino thioesters in high yields under mild reaction conditions in a short time. A new type of C-C bond formation followed by an unexpected rearrangement of the alkylthio group took place with the unsaturated ketones to afford the β-alkylthio-α-amino thioesters in high yields with good diastereoselectivity.
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Affiliation(s)
- Isao Mizota
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Mie 514-8507 , Japan
| | - Chihiro Ueda
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Mie 514-8507 , Japan
| | - Yun Tesong
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Mie 514-8507 , Japan
| | - Yusuke Tsujimoto
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Mie 514-8507 , Japan
| | - Makoto Shimizu
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Mie 514-8507 , Japan
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9
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Grisin A, Oliver S, Ganton MD, Bacsa J, Evans PA. Diastereoselective construction of anti-4,5-disubstituted-1,3-dioxolanes via a bismuth-mediated two-component hemiacetal oxa-conjugate addition of γ-hydroxy-α,β-unsaturated ketones with paraformaldehyde. Chem Commun (Camb) 2016; 51:15681-4. [PMID: 26365112 DOI: 10.1039/c5cc01949d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The bismuth-mediated two-component hemiacetal oxa-conjugate addition of γ-hydroxy-α,β-unsaturated ketones with paraformaldehyde affords anti-4,5-disubstituted-1,3-dioxolanes in an efficient and stereoselective manner. The reaction provides a practical, inexpensive and atom-economical approach to these types of heterocycles, which represent useful intermediates for target-directed synthesis and precursors to syn-1,2-diols.
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Affiliation(s)
- Aleksandr Grisin
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada.
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10
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Huang HC, Chao CL, Liaw CC, Hwang SY, Kuo YH, Chang TC, Chao CH, Chen CJ, Kuo YH. Hypoglycemic Constituents Isolated from Trapa natans L. Pericarps. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:3794-803. [PMID: 27115849 DOI: 10.1021/acs.jafc.6b01208] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Trapa natans L., called water chestnut or water caltrop, is a floating aquarium plant. Its fruits are widely used as food. Two new tannins, 1 and 2, one new neolignan, 14, one new norlignan, 17, and 20 known compounds, 3-13, 15, 16, and 18-24 were isolated from T. natans pericarps in this study. The 1, 2, 14, and 17 structures were elucidated using a chemical method and extensive spectral evidence. A series of hydrolyzable tannins, 1-8, a lignin, 13, a flavonoid, 16, a norlignan, 17, and phenolic compounds, 18, 20, 21, and 24 resulted in the enhanced glucose uptake activity in C2C12 myotubes. Compounds 4 and 5 significantly increased GLUT4 protein expression in C2C12 myotubes. In addition, 4 and 5 improved the phosphorylation of AMPK, AKT(S473), and AKT(T308). The involvement of AMPK and PI3K in the mechanism of action of compounds 4 and 5 was confirmed by use of AMPK and PI3K inhibitors, which completely suppressed the 4- and 5-mediated activities of glucose uptake in C2C12 myotubes. We also demonstrated that 4 and 5 could increase GLUT4 protein levels in plasma membranes.
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Affiliation(s)
- Hui-Chi Huang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University , Taichung 404, Taiwan
- Tsuzuki Institute for Traditional Medicine, China Medical University , Taichung 404, Taiwan
| | - Chien-Liang Chao
- Graduate Institute of Life Sciences, National Defense Medical Center , Taipei 114, Taiwan
| | - Chia-Ching Liaw
- Research and Development Department, Starsci Biotech Co., Ltd. , Taipei 112, Taiwan
| | - Syh-Yuan Hwang
- Endemic Species Research Institute , Council of Agriculture, Nantou 552, Taiwan
| | - Yao-Haur Kuo
- Division of Chinese Material Medica Development, National Research Institute of Chinese Medicine, Ministry of Health and Welfare , Taipei 112, Taiwan
- Graduate Institute of Integrated Medicine, China Medical University , Taichung 404, Taiwan
| | - Tsu-Chung Chang
- Graduate Institute of Life Sciences, National Defense Medical Center , Taipei 114, Taiwan
- Department of Biochemistry, National Defense Medical Center , Taipei 114, Taiwan
| | - Chih-Hua Chao
- School of Pharmacy, China Medical University , Taichung 404, Taiwan
- Chinese Medicine Research and Development Center, China Medical University Hospital , Taichung 404, Taiwan
| | - Chao-Jung Chen
- Graduate Institute of Integrated Medicine, China Medical University , Taichung 404, Taiwan
- Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital , Taichung 404, Taiwan
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University , Taichung 404, Taiwan
- Tsuzuki Institute for Traditional Medicine, China Medical University , Taichung 404, Taiwan
- Department of Biotechnology, Asia University , Taichuang 413, Taiwan
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11
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Müller JM, Stark CBW. Diastereodivergent Reverse Prenylation of Indole and Tryptophan Derivatives: Total Synthesis of Amauromine, Novoamauromine, and epi-Amauromine. Angew Chem Int Ed Engl 2016; 55:4798-802. [PMID: 26969898 DOI: 10.1002/anie.201509468] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Indexed: 11/06/2022]
Abstract
A regio- and stereoselective reverse prenylation of indole and tryptophan derivatives is presented. All four possible stereoisomers are accessible through this iridium-catalyzed reaction. The stereoselectivity is controlled by a chiral phosphoramidite ligand in combination with an achiral borane additive and can be switched by changing the nature of the borane. One enantiomer of the ligand is thus sufficient to prepare all possible isomers. The synthetic potential of this method was demonstrated by a short total synthesis of amauromine and its two natural diastereomers.
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Affiliation(s)
- Jonas M Müller
- Fachbereich Chemie, Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King Platz 6, 20146, Hamburg, Germany
| | - Christian B W Stark
- Fachbereich Chemie, Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King Platz 6, 20146, Hamburg, Germany.
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12
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Müller JM, Stark CBW. Diastereodivergente inverse Prenylierung von Indol‐ und Tryptophan‐Derivaten: Totalsynthese von Amauromin, Novoamauromin und
epi
‐Amauromin. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509468] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jonas M. Müller
- Fachbereich Chemie Institut für Organische Chemie Universität Hamburg Martin-Luther-King Platz 6 20146 Hamburg Deutschland
| | - Christian B. W. Stark
- Fachbereich Chemie Institut für Organische Chemie Universität Hamburg Martin-Luther-King Platz 6 20146 Hamburg Deutschland
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13
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Li C, Grugel CP, Breit B. Rhodium-catalyzed chemo- and regioselective decarboxylative addition of β-ketoacids to alkynes. Chem Commun (Camb) 2016; 52:5840-3. [DOI: 10.1039/c6cc02272c] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A highly efficient rhodium-catalyzed chemo- and regioselective addition of β-ketoacids to alkynes is reported.
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Affiliation(s)
- Changkun Li
- Institut für Organische Chemie
- Albert-Ludwigs-Universität Freiburg
- 79104 Freiburg im Breisgau
- Germany
| | - Christian P. Grugel
- Institut für Organische Chemie
- Albert-Ludwigs-Universität Freiburg
- 79104 Freiburg im Breisgau
- Germany
| | - Bernhard Breit
- Institut für Organische Chemie
- Albert-Ludwigs-Universität Freiburg
- 79104 Freiburg im Breisgau
- Germany
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14
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Kazmaier U. Non-stabilized enolates – versatile nucleophiles in transition metal-catalysed allylic alkylations. Org Chem Front 2016. [DOI: 10.1039/c6qo00192k] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review covers new developments in the transition metal-catalyzed allylic alkylations of non-stabilized enolates, preferentially generated from ketone, esters or amides.
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Affiliation(s)
- Uli Kazmaier
- Institute of Organic Chemistry
- Saarland University
- 66041 Saarbrücken
- Germany
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15
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Tao JL, Yang B, Wang ZX. Pincer-Nickel-Catalyzed Allyl-Aryl Coupling between Allyl Methyl Ethers and Arylzinc Chlorides. J Org Chem 2015; 80:12627-34. [PMID: 26556232 DOI: 10.1021/acs.joc.5b02151] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The P,N,N-pincer nickel complex [Ni(Cl){N(2-Ph2PC6H4)(2'-Me2NC6H4)}]-catalyzed allyl-aryl coupling was studied. The reaction of allyl methyl ethers, including (1-methoxyallyl)arenes and (3-methoxyprop-1-en-1-yl)arenes, with arylzinc chlorides afforded linear (E)-alkenes in high yields, whereas the reaction of (E)-1-methoxytridec-2-ene with p-Me2NC6H4ZnCl generated a mixture of linear and branched alkenes.
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Affiliation(s)
- Jian-Long Tao
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
| | - Bo Yang
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China
| | - Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.,Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, People's Republic of China
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16
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Rhodium-catalysed asymmetric allylic arylation of racemic halides with arylboronic acids. Nat Chem 2015; 7:935-9. [DOI: 10.1038/nchem.2360] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 08/28/2015] [Indexed: 11/08/2022]
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17
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Das A, Wang D, Belhomme MC, Szabó KJ. Copper-Catalyzed Cross-Coupling of Allylboronic Acids with α-Diazoketones. Org Lett 2015; 17:4754-7. [DOI: 10.1021/acs.orglett.5b02285] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arindam Das
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Dong Wang
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Marie-Charlotte Belhomme
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
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18
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Li C, Breit B. Rhodium-catalyzed chemo- and regioselective decarboxylative addition of β-ketoacids to allenes: efficient construction of tertiary and quaternary carbon centers. J Am Chem Soc 2014; 136:862-5. [PMID: 24397382 DOI: 10.1021/ja411397g] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A rhodium-catalyzed chemo- and regioselective intermolecular decarboxylative addition of β-ketoacids to terminal allenes is reported. Using a Rh(I)/DPPF system, tertiary and quaternary carbon centers were formed with exclusively branched selectivity under mild conditions. Preliminary mechanism studies support that the carbon-carbon bond formation precedes the decarboxylation and the reaction occurs in an outer-sphere mechanism.
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Affiliation(s)
- Changkun Li
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg , Albertstrasse 21, 79104 Freiburg im Breisgau, Germany
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19
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Atallah T, Blankespoor RL, Homan P, Hulderman C, Samas BM, Van Allsburg K, Vrieze DC. Substituent effects on the amination of racemic allyl carbonates using commercially available chiral rhodium catalysts. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.08.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Kwon J, Kondaji G, Song S, Kim C, Lee K, Kim WK, Choi Y. Synthesis of Naturally Occurring Norlignan (±)-Nyasol. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.4.1247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Krishnan D, Wu M, Chiang M, Li Y, Leung PH, Pullarkat SA. N-Heterocyclic Carbene C,S Palladium(II) π-Allyl Complexes: Synthesis, Characterization, and Catalytic Application In Allylic Amination Reactions. Organometallics 2013. [DOI: 10.1021/om400110t] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Deepa Krishnan
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Meiyi Wu
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Minyi Chiang
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yongxin Li
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Pak-Hing Leung
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Sumod A. Pullarkat
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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22
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Nagy EE, Hyatt IFD, Gettys KE, Yeazell ST, Frempong SK, Croatt MP. Sequential Pd(0)-, Rh(I)-, and Ru(II)-Catalyzed Reactions in a Nine-Step Synthesis of Clinprost. Org Lett 2013; 15:586-9. [DOI: 10.1021/ol303402e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Emma E. Nagy
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - I. F. Dempsey Hyatt
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Kristen E. Gettys
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Shawn T. Yeazell
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Stephen K. Frempong
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Mitchell P. Croatt
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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23
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Evans PA, Oliver S, Chae J. Rhodium-Catalyzed Allylic Substitution with an Acyl Anion Equivalent: Stereospecific Construction of Acyclic Quaternary Carbon Stereogenic Centers. J Am Chem Soc 2012; 134:19314-7. [DOI: 10.1021/ja306602g] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. Andrew Evans
- Department of Chemistry, The University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Samuel Oliver
- Department of Chemistry, The University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Jungha Chae
- Department of Chemistry, The University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
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24
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Liu Z, Feng X, Du H. Rhodium-Catalyzed Asymmetric Formal Cycloadditions of Racemic Butadiene Monoxide with Imines. Org Lett 2012; 14:3154-7. [DOI: 10.1021/ol301248d] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhaoqun Liu
- Beijing National Laboratory of Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiangqing Feng
- Beijing National Laboratory of Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Haifeng Du
- Beijing National Laboratory of Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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25
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Ramachary DB, Sakthidevi R, Shruthi KS. Asymmetric supramolecular catalysis: a bio-inspired tool for the high asymmetric induction in the enamine-based Michael reactions. Chemistry 2012; 18:8008-12. [PMID: 22649025 DOI: 10.1002/chem.201200962] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Indexed: 01/23/2023]
Abstract
King size: Utilization of large-size supramolecular rings in the pre-transition state (pre-TS) of enamine-based Michael reactions for high asymmetric induction is described. Enantiomerically pure, druglike hexahydroxanthenes with three contiguous stereocenters were synthesized through supramolecular catalysis by D-proline and quinine-NH-thiourea followed by reductive etherification from simple precursors under mild conditions (see scheme).
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26
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Riveiros R, Tato R, Pérez Sestelo J, Sarandeses LA. Rhodium-Catalyzed Allylic Substitution Reactions with Indium(III) Organometallics. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200104] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Brazeau JF, Zhang S, Colomer I, Corkey BK, Toste FD. Enantioselective cyclizations of silyloxyenynes catalyzed by cationic metal phosphine complexes. J Am Chem Soc 2012; 134:2742-9. [PMID: 22296571 PMCID: PMC3279184 DOI: 10.1021/ja210388g] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The discovery of complementary methods for enantioselective transition metal-catalyzed cyclization with silyloxyenynes has been accomplished using chiral phosphine ligands. Under palladium catalysis, 1,6-silyloxyenynes bearing a terminal alkyne led to the desired five-membered ring with high enantioselectivities (up to 91% ee). As for reactions under cationic gold catalysis, 1,6- and 1,5-silyloxyenynes bearing an internal alkyne furnished the chiral cyclopentane derivatives with excellent enantiomeric excess (up to 94% ee). Modification of the substrate by incorporating an α,β-unsaturation led to the discovery of a tandem cyclization. Remarkably, using silyloxy-1,3-dien-7-ynes under gold catalysis conditions provided the bicyclic derivatives with excellent diastereo- and enantioselectivities (up to >20:1 dr and 99% ee).
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28
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Chen K, Li H, Li Y, Zhang XS, Lei ZQ, Shi ZJ. Direct oxidative arylation via rhodium-catalyzed C–C bond cleavage of secondary alcohols with arylsilanes. Chem Sci 2012. [DOI: 10.1039/c2sc00923d] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Evans PA, Clizbe EA, Lawler MJ, Oliver S. Enantioselective rhodium-catalyzed allylic alkylation of acyclic α-alkoxy substituted ketones using a chiral monodentate phosphite ligand. Chem Sci 2012. [DOI: 10.1039/c2sc20141k] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Onishi Y, Nishimoto Y, Yasuda M, Baba A. InI3/Me3SiI-catalyzed Direct Alkylation of Enol Acetates Using Alkyl Acetates or Alkyl Ethers. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1223] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Štambaský J, Kapras V, Štefko M, Kysilka O, Hocek M, Malkov AV, Kočovský P. A Modular Approach to Aryl-C-ribonucleosides via the Allylic Substitution and Ring-Closing Metathesis Sequence. A Stereocontrolled Synthesis of All Four α-/β- and d-/l-C-Nucleoside Stereoisomers. J Org Chem 2011; 76:7781-803. [DOI: 10.1021/jo201110z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jan Štambaský
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Vojtěch Kapras
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Martin Štefko
- Institute of Organic Chemistry and Biochemistry, Gilead Sciences & IOCB Research Center, Academy of Sciences of the Czech Republic, CZ-16610, Prague 6, Czech Republic
| | - Ondřej Kysilka
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Michal Hocek
- Institute of Organic Chemistry and Biochemistry, Gilead Sciences & IOCB Research Center, Academy of Sciences of the Czech Republic, CZ-16610, Prague 6, Czech Republic
| | - Andrei V. Malkov
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
| | - Pavel Kočovský
- Department of Chemistry, WestChem, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K
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32
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Young AJ, White MC. Allylic CH Alkylation of Unactivated α-Olefins: Serial Ligand Catalysis Resumed. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101654] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Allylic CH Alkylation of Unactivated α-Olefins: Serial Ligand Catalysis Resumed. Angew Chem Int Ed Engl 2011; 50:6824-7. [DOI: 10.1002/anie.201101654] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Indexed: 11/07/2022]
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34
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Li D, Ohmiya H, Sawamura M. Copper-Catalyzed γ-Selective and Stereospecific Allylic Alkylation of Ketene Silyl Acetals. J Am Chem Soc 2011; 133:5672-5. [DOI: 10.1021/ja111645q] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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35
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Begouin JM, Klein JEMN, Weickmann D, Plietker B. Allylic Substitutions Catalyzed by Miscellaneous Metals. TOP ORGANOMETAL CHEM 2011. [DOI: 10.1007/3418_2011_15] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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36
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Mastracchio A, Warkentin AA, Walji AM, MacMillan DWC. Direct and enantioselective {alpha}-allylation of ketones via singly occupied molecular orbital (SOMO) catalysis. Proc Natl Acad Sci U S A 2010; 107:20648-51. [PMID: 20921367 PMCID: PMC2996445 DOI: 10.1073/pnas.1002845107] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The first enantioselective organocatalytic α-allylation of cyclic ketones has been accomplished via singly occupied molecular orbital catalysis. Geometrically constrained radical cations, forged from the one-electron oxidation of transiently generated enamines, readily undergo allylic alkylation with a variety of commercially available allyl silanes. A reasonable latitude in both the ketone and allyl silane components is readily accommodated in this new transformation. Moreover, three new oxidatively stable imidazolidinone catalysts have been developed that allow cyclic ketones to successfully participate in this transformation. The new catalyst platform has also been exploited in the first catalytic enantioselective α-enolation and α-carbooxidation of ketones.
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Affiliation(s)
| | | | - Abbas M. Walji
- Merck Center for Catalysis at Princeton University, Princeton, NJ 08544
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37
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Menard F, Perez D, Sustac Roman D, Chapman TM, Lautens M. Ligand-controlled selectivity in the desymmetrization of meso cyclopenten-1,4-diols via rhodium(I)-catalyzed addition of arylboronic acids. J Org Chem 2010; 75:4056-68. [PMID: 20469847 DOI: 10.1021/jo100391e] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly enantioselective desymmetrization of meso cyclopent-2-ene-1,4-diethyl dicarbonates has been developed using a Rh-catalyzed asymmetric allylic substitution. Depending on the type of ligand used, each of two regioisomeric products can be obtained in good yield and excellent enantioselectivity. Under rhodium(I) catalysis, bisphosphine P-Phos ligands form trans-1,2-arylcyclopentenols as the major product, whereas Segphos ligands lead predominantly to trans-1,4-arylcyclopentenols.
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Affiliation(s)
- Frederic Menard
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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38
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Ejiri S, Odo S, Takahashi H, Nishimura Y, Gotoh K, Nishihara Y, Takagi K. Negishi alkyl-aryl cross-coupling catalyzed by Rh: efficiency of novel tripodal 3-diphenylphosphino-2-(diphenylphosphino)methyl-2-methylpropyl acetate ligand. Org Lett 2010; 12:1692-5. [PMID: 20225837 DOI: 10.1021/ol100210u] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
3-Diphenylphosphino-2-(diphenylphoshino)methyl-2-methylpropyl acetate acted as an efficient ligand for a Rh catalyst, achieving cross-coupling between arylzinc compounds bearing electron-withdrawing groups and alkyl electrophiles. The beneficial effect of the tripodal ligand and such aryl nucleophiles was discussed with regard to the specificity of the Rh catalysis.
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Affiliation(s)
- Syogo Ejiri
- Department of Chemistry, Faculty of Science, Okayama University, Tsushima-Naka, Okayama 700-8530, Japan
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39
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Xu LW, Gao G, Gu FL, Sheng H, Li L, Lai GQ, Jiang JX. Dual Amine- and Brønsted Acid-Catalyzed α-Allylic Alkylation of Aldehydes. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000071] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Wang J, Xie X, Ma F, Peng Z, Zhang L, Zhang Z. Rhodium-catalyzed synthesis of γ-butyrolactams and pyrrolidines via cycloisomerization of N-tethered 1,6-enynes. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.03.097] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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41
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Ohmiya H, Makida Y, Li D, Tanabe M, Sawamura M. Palladium-catalyzed gamma-selective and stereospecific allyl-aryl coupling between acyclic allylic esters and arylboronic acids. J Am Chem Soc 2010; 132:879-89. [PMID: 20030361 DOI: 10.1021/ja9092264] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions between acyclic (E)-allylic acetates and arylboronic acids in the presence of a palladium catalyst prepared from Pd(OAc)(2), phenanthroline (or bipyridine), and AgSbF(6) (1:1.2:1) proceeded with excellent gamma-selectivity to afford allyl-aryl coupling products with E-configuration. The reactions of alpha-chiral allylic acetates took place with excellent alpha-to-gamma chirality transfer with syn stereochemistry to give allylated arenes with a stereogenic center at the benzylic position. The reaction tolerated a broad range of functional groups in both the allylic acetates and the arylboronic acids. Furthermore, gamma-arylation of cinnamyl alcohol derivatives afforded gem-diarylalkane derivatives containing an unconjugated alkenic substituent. The synthetic utility of this method was demonstrated by its utilization in an efficient synthesis of (+)-sertraline, an antidepressant agent. The observed gamma-regioselectivity and E-1,3-syn stereochemistry were rationalized based on a Pd(II) mechanism involving transmetalation between a cationic mono(acyloxo)palladium(II) complex and arylboronic acid, and directed carbopalladation followed by syn-beta-acyloxy elimination. The results of stoichiometric reactions of palladium complexes related to possible intermediates were fully consistent with the proposed mechanism.
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Affiliation(s)
- Hirohisa Ohmiya
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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42
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Jacq J, Bessières B, Einhorn C, Einhorn J. Regiospecific synthesis of functionalised 1,3-diarylisobenzofurans via palladium- and rhodium-catalysed reaction of boronic acids with o-acylbenzaldehydes under thermal or microwave activation. Org Biomol Chem 2010; 8:4927-33. [DOI: 10.1039/c0ob00110d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Vrieze DC, Hoge GS, Hoerter PZ, Van Haitsma JT, Samas BM. A highly enantioselective allylic amination reaction using a commercially available chiral rhodium catalyst: resolution of racemic allylic carbonates. Org Lett 2009; 11:3140-2. [PMID: 19527001 DOI: 10.1021/ol901031b] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel method for the kinetic resolution of unsymmetrical acyclic allylic carbonates and the concurrent synthesis of enantioenriched secondary amines using a commercially available chiral catalyst is disclosed.
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Affiliation(s)
- Derek C Vrieze
- Pfizer Global Research and Development, 2800 Plymouth Road, Ann Arbor, Michigan 48105, USA.
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44
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Chianese AR, Bremer PT, Wong C, Reynes RJ. Rigid, Sterically Diverse N-Heterocyclic Carbene-Pyridine Chelates: Synthesis, Mild Palladation, and Palladium-Catalyzed Allylic Substitution. Organometallics 2009. [DOI: 10.1021/om900554c] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anthony R. Chianese
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Paul T. Bremer
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Christina Wong
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
| | - Rae Julienne Reynes
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346
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45
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Takahashi H, Inagaki S, Yoshii N, Gao F, Nishihara Y, Takagi K. Rh-catalyzed Negishi alkyl-aryl cross-coupling leading to alpha- or beta-phosphoryl-substituted alkylarenes. J Org Chem 2009; 74:2794-7. [PMID: 19267488 DOI: 10.1021/jo900142b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The catalytic cross-coupling between ArZnX and ICH(2)(CH(2))(n)P(O)(OEt)(2) (n = 0-3) has been investigated to determine the utility of the Rh catalyst during the alkyl-aryl cross-coupling and to develop a new synthetic method for phosphoryl-substituted alkylarenes. Rh-dppf exhibits an excellent catalytic activity for the reaction with the alkylphosphonate of n = 1, whereas for the reaction with those of n = 2 or 3, beta-hydride elimination mainly takes place. As for the reaction with an alkylphosphonate of n = 0, a polarity inversion of the coupling components is necessary in order to provide the coupling products; the phosphoryl analogue of the Reformatsky reagent and ArI give the cross-coupling products in good yields through the catalysis by Rh-dppf.
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Affiliation(s)
- Hideki Takahashi
- Department of Chemistry, Faculty of Science, Okayama University, Tsushima, Okayama 700-8530, Japan
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46
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Linder D, Buron F, Constant S, Lacour J. Enantioselective CpRu-Catalyzed Carroll Rearrangement - Ligand and Metal Source Importance. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800854] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Bouziane A, Carboni B, Bruneau C, Carreaux F, Renaud JL. Pentamethylcyclopentadienyl ruthenium: an efficient catalyst for the redox isomerization of functionalized allylic alcohols into carbonyl compounds. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.095] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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48
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Kadnikova EN, Thakor VA. Enantioselective hydrolysis of 1-arylallyl acetates catalyzed by Candida antarctica lipase. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.04.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Clive DLJ, Stoffman EJL. Synthesis of (-)-conocarpan by two routes based on radical cyclization and establishment of its absolute configuration. Org Biomol Chem 2008; 6:1831-42. [PMID: 18452020 DOI: 10.1039/b801858h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two independent routes for the total synthesis of the bioactive neolignan (-)-conocarpan are described. The first (98% ee) is based on formal radical cyclization onto a benzene ring, and involves a 5-exo-trigonal closure onto a double bond restrained within a 6-membered ring. The second route (88% ee), which is shorter, is based on 5-exo-trigonal cyclization of an aryl radical onto a pendant terminal double bond. The two routes differ in their degree of stereoselectivity. The absolute configuration originally assigned to (+)-conocarpan had previously been called into question on the basis of empirical chiroptical rules; the present chemical work confirms the need for revision, and the assigned absolute configurations of several compounds correlated with (+)-conocarpan must also be changed.
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Affiliation(s)
- Derrick L J Clive
- Chemistry Department, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
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50
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Li F, Yang XW. Biotransformation of myrislignan by rat liver microsomes in vitro. PHYTOCHEMISTRY 2008; 69:765-771. [PMID: 17964618 DOI: 10.1016/j.phytochem.2007.09.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2007] [Revised: 06/24/2007] [Accepted: 09/14/2007] [Indexed: 05/25/2023]
Abstract
Myrislignan (1), erythro-(1R,2S)-2-(4-allyl-2,6-dimethoxyphenoxyl)-1-(4-hydroxy-3-methoxyphenyl) propan-1-ol, is a major acyclic neolignan in seeds of Myristica fragrans. Studies have suggested that myrislignan may deter feeding activity, but little is known about its metabolism. We investigated the biotransformation of myrislignan by rat liver microsomes in vitro. Seven metabolites were produced by liver microsomes from rats pre-treated with sodium phenobarbital. These were identified, using spectroscopic methods, as myrislignanometins A-G (2-8), respectively.
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Affiliation(s)
- Fei Li
- The State Key Laboratory of Natural and Biomimetic Drugs and Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University, Beijing 100083, PR China
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