1
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Braire J, Macé A, Zaier R, Cordier M, Vidal J, Lalli C, Martel A, Carreaux F. Catalytic Enantioselective Allylboration and Related Reactions of Isatins Promoted by Chiral BINOLs: Scope and Mechanistic Studies. J Org Chem 2023; 88:1469-1492. [PMID: 36690446 DOI: 10.1021/acs.joc.2c02476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An improvement in the catalytic enantioselective allylboration of isatins with 2-allyl-1,3,2-dioxaborolane in the presence of chiral BINOL derivatives is reported, offering an efficient one-step access to enantioenriched N-unprotected 3-allyl-3-hydroxy-2-oxindoles. This catalytic process is also effective for the crotylboration reaction with enantiomeric ratios (er) up to 97:3, as well as for the asymmetric synthesis of homopropargylic alcohols via an allenyl addition to indoline-2,3-diones. Origins of the high enantioselectivity in chiral BINOL-catalyzed allylboration of isatins were examined by DFT calculations. A hypothetical scenario suggested a crucial internal hydrogen bonding between the amide group (C═O···H-O) and the ethylene hydroxyl of the transient chiral mixed boronate ester, generating a rigid and stabilized system that favors the addition of the allylboron species to the Re face of the ketone function. The key role of the alcohol additive (t-BuOH or t-AmOH) in the enantioselective allylboration reaction of isatins has also been shown on the basis of a kinetics study and computational calculations by favoring the transesterification of the 2-allyl-1,3,2-dioxaborolane with BINOL via proton transfer processes.
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Affiliation(s)
- Julien Braire
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Aurélie Macé
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Rania Zaier
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, Avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - Marie Cordier
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Joëlle Vidal
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Claudia Lalli
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Arnaud Martel
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS-Université du Maine, Avenue Olivier Messiaen, 72085 Cedex Le Mans, France
| | - François Carreaux
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
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2
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Stafford NP, Cheng MJ, Dinh DN, Verboom KL, Krische MJ. Chiral α-Stereogenic Oxetanols and Azetidinols via Alcohol-Mediated Reductive Coupling of Allylic Acetates: Enantiotopic π-Facial Selection in Symmetric Ketone Addition. ACS Catal 2022; 12:6172-6179. [PMID: 37063244 PMCID: PMC10104534 DOI: 10.1021/acscatal.2c01647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iridium-tol-BINAP-catalyzed reductive coupling of allylic acetates with oxetanones and azetidinones mediated by 2-propanol provides chiral α-stereogenic oxetanols and azetidinols. As illustrated in 50 examples, complex, nitrogen-rich substituents that incorporate the top 10 N-heterocycles found in FDA-approved drugs are tolerated. In addition to 2-propanol-mediated reductive couplings, oxetanols and azetidinols may serve dually as reductant and ketone proelectrophiles in redox-neutral C-C couplings via hydrogen auto-transfer, as demonstrated by the conversion of dihydro-1a and dihydro-1b to adducts 3a and 4a, respectively. The present method delivers hitherto inaccessible chiral oxetanols and azetidinols, which are important bioisosteres.
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Affiliation(s)
- Nicholas P. Stafford
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Melinda J. Cheng
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Duong Nguyen Dinh
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Katherine L. Verboom
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
| | - Michael J. Krische
- Department of Chemistry, University of Texas at Austin, 105 E 24th Street, Austin, Texas 78712, United States
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3
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Tang X, Su Z, Lin Q, Lin L, Dong S, Feng X. Asymmetric catalytic α‐selective allylation of ketones with allyltrifluoroborates using dual‐functional chiral
In
III
/
N
,
N
′‐dioxide complex. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoxue Tang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry Sichuan University Chengdu 610064 P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry Sichuan University Chengdu 610064 P. R. China
| | - Qianchi Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry Sichuan University Chengdu 610064 P. R. China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry Sichuan University Chengdu 610064 P. R. China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry Sichuan University Chengdu 610064 P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry Sichuan University Chengdu 610064 P. R. China
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4
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Li K, Sun X, Zhao S, Li T, Zha Z, Wang Z. Zn-Catalyzed enantioselective allylation and allenylation of isatins by virtue of a proline-derived chiral ligand. Chem Commun (Camb) 2022; 58:2156-2159. [PMID: 35060568 DOI: 10.1039/d1cc06563g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An asymmetric allylation and allenylation of isatins with facile organoboron reagents was developed under the catalysis of a Lewis acid. A series of optically pure 3-allyl-3-hydroxyoxindoles and 3-allenyl-3-hydroxyoxindoles can be obtained in excellent yields (up to 99% yield) and high enantioselectivities (up to 97% ee). The possible transition state was supported by DFT calculation and the corresponding mechanism was proposed. A gram scale experiment and further functionalization of these chiral 3-hydroxyoxindoles are established.
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Affiliation(s)
- Kuiliang Li
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Xiang Sun
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Shuangshuang Zhao
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Tong Li
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
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5
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Liu XS, Li Y, Li X. Bi(OAc) 3/Chiral Phosphoric Acid-Catalyzed Enantioselective 1,2- and Formal 1,4-Allylation Reaction of β,γ-Unsaturated α-Ketoesters. Org Lett 2021; 23:9128-9133. [PMID: 34779206 DOI: 10.1021/acs.orglett.1c03453] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A highly efficient asymmetric 1,2-allylation reaction of β,γ-unsaturated α-ketoesters was realized by using a Bi(OAc)3/chiral phosphoric acid catalyst system under mild conditions. Meanwhile, using this combined strategy of enantioselective 1,2-allylation and subsequent anionic oxy-Cope rearrangement, the asymmetric formal 1,4-allylation reaction was achieved by a one-pot process. These reactions offer rapid access to an array of homoallylic tertiary alcohols and γ-allyl-α-ketoesters with good yields and excellent enantioselectivities. Density functional theory calculations were conducted to interpret the high enantioselectivity.
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Affiliation(s)
- Xiang-Shuai Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yao Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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6
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Access to enantioenriched compounds bearing challenging tetrasubstituted stereocenters via kinetic resolution of auxiliary adjacent alcohols. Nat Commun 2021; 12:3735. [PMID: 34145256 PMCID: PMC8213810 DOI: 10.1038/s41467-021-23990-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/21/2021] [Indexed: 11/28/2022] Open
Abstract
Contemporary asymmetric catalysis faces huge challenges when prochiral substrates bear electronically and sterically unbiased substituents and when substrates show low reactivities. One of the inherent limitations of chiral catalysts and ligands is their incapability in recognizing prochiral substrates bearing similar groups. This has rendered many enantiopure substances bearing several similar substituents inaccessible. Here we report the rationale, scope, and applications of the strategy of kinetic resolution of auxiliary adjacent alcohols (KRA*) that can be used to solve the above troubles. Using this method, a large variety of optically enriched tertiary alcohols, epoxides, esters, ketones, hydroxy ketones, epoxy ketones, β-ketoesters, and tetrasubstituted methane analogs with two, three, and four spatially and electronically similar groups can be readily obtained (totally 96 examples). At the current stage, the strategy serves as the optimal solution that can complement the inability caused by direct asymmetric catalysis in getting chiral molecules with challenging fully substituted stereocenters. A large number of enantiopure substances, such as those with tetrasubstituted carbon centres bearing several similar substituents, are inaccessible due to the incapability of chiral catalysts/ligands to recognize those substrates. Here, the authors develop kinetic resolution of auxiliary adjacent alcohols (KRA*) strategy to access various optically enriched compounds with two, three or four spatially and electronically similar groups.
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7
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Wang L, Zhu H, Peng T, Yang D. Conjugated ynones in catalytic enantioselective reactions. Org Biomol Chem 2021; 19:2110-2145. [PMID: 33625439 DOI: 10.1039/d0ob02521f] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Conjugated ynones are easily accessible feedstock and the existence of an alkyne bond endows ynones with different attractive reactivities, thus making them unique substrates for catalytic asymmetric reactions. Their compatibility under organocatalytic, metal-catalyzed as well as cooperative catalytic conditions has resulted in numerous enantioselective transformations. Importantly, conjugated ynones can act as nucleophiles or electrophiles, and serve as easily accessed synthons for different cyclization pathways. This review summarizes the recent literature examples of the catalytic reactions of conjugated ynones and related compounds such as alkyne conjugated α-ketoesters, and classifies these reaction types alongside mechanistic insights whenever possible. We aim to trigger more intensive research in the future to render the asymmetric transformation of ynones as a common and reliable tool for asymmetric synthesis.
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Affiliation(s)
- Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Haiyong Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Tianyu Peng
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China.
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8
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Hu P, Peters BK, Malapit CA, Vantourout JC, Wang P, Li J, Mele L, Echeverria PG, Minteer SD, Baran PS. Electroreductive Olefin-Ketone Coupling. J Am Chem Soc 2020; 142:20979-20986. [PMID: 33259715 DOI: 10.1021/jacs.0c11214] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A user-friendly approach is presented to sidestep the venerable Grignard addition to unactivated ketones to access tertiary alcohols by reversing the polarity of the disconnection. In this work a ketone instead acts as a nucleophile when adding to simple unactivated olefins to accomplish the same overall transformation. The scope of this coupling is broad as enabled using an electrochemical approach, and the reaction is scalable, chemoselective, and requires no precaution to exclude air or water. Multiple applications demonstrate the simplifying nature of the reaction on multistep synthesis, and mechanistic studies point to an intuitive mechanism reminiscent of other chemical reductants such as SmI2 (which cannot accomplish the same reaction).
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Affiliation(s)
- Pengfei Hu
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Byron K Peters
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Christian A Malapit
- Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City 84112, Utah, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Julien C Vantourout
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Pan Wang
- Center for Excellence of Process Science, Asymchem Laboratories (Tianjin) Co., Ltd. TEDA, Tianjin 300457, P. R. China
| | - Jinjun Li
- Center for Excellence of Process Science, Asymchem Laboratories (Tianjin) Co., Ltd. TEDA, Tianjin 300457, P. R. China
| | - Lucas Mele
- Minakem Recherche, 145 Chemin des Lilas, Beuvry-la-Forêt 59310, France
| | | | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City 84112, Utah, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
| | - Phil S Baran
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla 92037, California, United States.,NSF Center for Synthetic Organic Electrochemistry, University of Utah, 315 South 1400 East, Salt Lake City 84112, Utah, United States
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9
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Kavanagh SE, Gilheany DG. Harnessing the Power of the Asymmetric Grignard Synthesis of Tertiary Alcohols: Ligand Development and Improved Scope Exemplified by One-Step Gossonorol Synthesis. Org Lett 2020; 22:8198-8203. [PMID: 33074677 DOI: 10.1021/acs.orglett.0c02629] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of N-substituted cyclohexyldiaminophenolic ligands for the asymmetric Grignard synthesis of tertiary alcohols is reported. The 2,5-dimethylpyrrole-decorated ligand led to improved enantioselectivities and broadened the scope of the methodology. As an exemplar, we report an unprecedented highly selective one-step synthesis of gossonorol in 93% ee, also constituting the shortest formal syntheses of natural products boivinianin B and yingzhaosu C.
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Affiliation(s)
- Saranna E Kavanagh
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Declan G Gilheany
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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10
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Yuan J, Jain P, Antilla JC. Bi(cyclopentyl)diol-Derived Boronates in Highly Enantioselective Chiral Phosphoric Acid-Catalyzed Allylation, Propargylation, and Crotylation of Aldehydes. J Org Chem 2020; 85:12988-13003. [PMID: 32960066 DOI: 10.1021/acs.joc.0c01646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study, we disclose the catalytic addition of bi(cyclopentyl)diol-derived boronates to aldehydes promoted by chiral phosphoric acids, allowing for the formation of enantioenriched homoallylic, propargylic, and crotylic alcohols (up to >99% enantiomeric excess (ee), diastereomeric ratio (dr) >20:1). These boronate substrates provided superior enantioselectivities, allowing for the reactions to proceed with low catalyst loading (0.5-5 mol %) and reduced reaction time (15 min at room temperature for aldehyde allylboration). A wide substrate scope was exhibited, and the novel boronates provided high enantiocontrol. Reactions with substituted allylboronates and aldehydes yielded vicinal stereogenic alcohols bearing β-tertiary or quaternary carbon centers. High enantio- and diastereoselectivities were found due to the closed six-membered chair-like transition state, with backbone modifications of the boronate and its interactions with the chiral phosphoric acid being the most likely contributing factor.
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Affiliation(s)
- Jinping Yuan
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Pankaj Jain
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts 02139, United States
| | - Jon C Antilla
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China.,School of Sciences, Zhejiang Sci-Tech University, Hangzhou City, Zhejiang Province 310018, China
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11
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Chen J, Chen M. Enantioselective Syntheses of ( Z)-6'-Boryl- anti-1,2-oxaborinan-3-enes via a Dienylboronate Protoboration and Asymmetric Allylation Reaction Sequence. Org Lett 2020; 22:7321-7326. [PMID: 32903009 DOI: 10.1021/acs.orglett.0c02657] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The enantioselective synthesis of 6'-boryl-anti-1,2-oxaborinan-3-enes is reported. A Cu-catalyzed highly stereoselective 1,4-protoboration of 1,1-bisboryl-1,3-butadiene is developed to generate (E)-α,δ-bisboryl-crotylboronate. The chiral phosphoric-acid-catalyzed asymmetric allylboration of aldehydes with the boron reagent produces 6'-boryl-anti-1,2-oxaborinan-3-enes with excellent Z-selectivities and enantioselectivities. The product contains a vinyl and alkyl boronate unit that can directly participate in a variety of subsequent transformations.
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Affiliation(s)
- Jichao Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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12
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Braire J, Dorcet V, Vidal J, Lalli C, Carreaux F. BINOL derivatives-catalysed enantioselective allylboration of isatins: application to the synthesis of (R)-chimonamidine. Org Biomol Chem 2020; 18:6042-6046. [PMID: 32729604 DOI: 10.1039/d0ob01386b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The asymmetric synthesis of the 3-allyl-3-hydroxyoxindole skeleton was accomplished in yields up to 99% via a metal-free and enantioselective allylation of isatins (90-96% ee) using BINOL derivatives as catalysts and an optimized allylboronate. This methodology was applied at a gram-scale to the synthesis of the natural product (R)-chimonamidine.
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Affiliation(s)
- Julien Braire
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France.
| | - Vincent Dorcet
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France.
| | - Joëlle Vidal
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France.
| | - Claudia Lalli
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France.
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13
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Novikov MA, Bobrova AY, Mezentsev IA, Medvedev MG, Tomilov YV. (2-Fluoroallyl)boration of Ketones with (2-Fluoroallyl)boronates. J Org Chem 2020; 85:6295-6308. [DOI: 10.1021/acs.joc.9b03445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maxim A. Novikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Angelina Yu. Bobrova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
- Higher Chemical College of the Russian Academy of Sciences, D. I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya pl., 125047 Moscow, Russian Federation
| | - Igor A. Mezentsev
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
- Higher Chemical College of the Russian Academy of Sciences, D. I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya pl., 125047 Moscow, Russian Federation
| | - Michael G. Medvedev
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Yury V. Tomilov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
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14
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Fager DC, Morrison RJ, Hoveyda AH. Regio- and Enantioselective Synthesis of Trifluoromethyl-Substituted Homoallylic α-Tertiary NH 2 -Amines by Reactions Facilitated by a Threonine-Based Boron-Containing Catalyst. Angew Chem Int Ed Engl 2020; 59:11448-11455. [PMID: 32219997 DOI: 10.1002/anie.202001184] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/25/2020] [Indexed: 12/20/2022]
Abstract
A method for catalytic regio- and enantioselective synthesis of trifluoromethyl-substituted and aryl-, heteroaryl-, alkenyl-, and alkynyl-substituted homoallylic α-tertiary NH2 -amines is introduced. Easy-to-synthesize and robust N-silyl ketimines are converted to NH-ketimines in situ, which then react with a Z-allyl boronate. Transformations are promoted by a readily accessible l-threonine-derived aminophenol-based boryl catalyst, affording the desired products in up to 91 % yield, >98:2 α:γ selectivity, >98:2 Z:E selectivity, and >99:1 enantiomeric ratio. A commercially available aminophenol may be used, and allyl boronates, which may contain an alkyl-, a chloro-, or a bromo-substituted Z-alkene, can either be purchased or prepared by catalytic stereoretentive cross-metathesis. What is more, Z-trisubstituted allyl boronates may be used. Various chemo-, regio-, and diastereoselective transformations of the α-tertiary homoallylic NH2 -amine products highlight the utility of the approach; this includes diastereo- and regioselective epoxide formation/trichloroacetic acid cleavage to generate differentiated diol derivatives.
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Affiliation(s)
- Diana C Fager
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Ryan J Morrison
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
- Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000, Strasbourg, France
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15
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Fager DC, Morrison RJ, Hoveyda AH. Regio‐ and Enantioselective Synthesis of Trifluoromethyl‐Substituted Homoallylic α‐Tertiary NH
2
‐Amines by Reactions Facilitated by a Threonine‐Based Boron‐Containing Catalyst. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Diana C. Fager
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Ryan J. Morrison
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Amir H. Hoveyda
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
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16
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Gao S, Duan M, Houk KN, Chen M. Chiral Phosphoric Acid Dual‐Function Catalysis: Asymmetric Allylation with α‐Vinyl Allylboron Reagents. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000039] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
| | - Meng Duan
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
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17
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Gao S, Duan M, Houk KN, Chen M. Chiral Phosphoric Acid Dual‐Function Catalysis: Asymmetric Allylation with α‐Vinyl Allylboron Reagents. Angew Chem Int Ed Engl 2020; 59:10540-10548. [DOI: 10.1002/anie.202000039] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Indexed: 01/09/2023]
Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
| | - Meng Duan
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
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18
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Sengoku T, Maegawa R, Imamura H, Wada M, Yoda H. Zinc Hydroxide‐Catalyzed Asymmetric Allylation of Acetophenones with Amido‐Functionalized Allylboronate in Water. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tetsuya Sengoku
- Department of Applied Chemistry, Faculty of EngineeringShizuoka University 3-5-1 Johoku, Naka-ku Hamamatsu 432-8561 Japan
| | - Ryunosuke Maegawa
- Department of Applied Chemistry, Faculty of EngineeringShizuoka University 3-5-1 Johoku, Naka-ku Hamamatsu 432-8561 Japan
| | - Hiroki Imamura
- Department of Applied Chemistry, Faculty of EngineeringShizuoka University 3-5-1 Johoku, Naka-ku Hamamatsu 432-8561 Japan
| | - Mitsuo Wada
- Department of Applied Chemistry, Faculty of EngineeringShizuoka University 3-5-1 Johoku, Naka-ku Hamamatsu 432-8561 Japan
| | - Hidemi Yoda
- Department of Applied Chemistry, Faculty of EngineeringShizuoka University 3-5-1 Johoku, Naka-ku Hamamatsu 432-8561 Japan
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19
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Liu J, Tong X, Chen M. Allylboration of Ketones and Imines with a Highly Reactive Bifunctional Allyl Pinacolatoboronate Reagent. J Org Chem 2020; 85:5193-5202. [DOI: 10.1021/acs.joc.9b03222] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jiaming Liu
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Xinbo Tong
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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20
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Drikermann D, Mößel RS, Al-Jammal WK, Vilotijevic I. Synthesis of Allylboranes via Cu(I)-Catalyzed B-H Insertion of Vinyldiazoacetates into Phosphine-Borane Adducts. Org Lett 2020; 22:1091-1095. [PMID: 31967841 DOI: 10.1021/acs.orglett.9b04619] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cu(I) catalysts enable C-B bond formation via direct insertion of vinyldiazoacetates into B-H bonds of borane-phosphine Lewis adducts to form phosphine-protected allylboranes under mild conditions. The resulting allylborane-phosphine Lewis adducts can be used in the diastereoselective allylation of aldehydes directly without the need for removal of the phosphine. The allylation reaction proceeds with high diastereoselectivity and yields 5,6-disubstituted dihydropyranones after treatment with an appropriate acid.
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Affiliation(s)
- Denis Drikermann
- Friedrich-Schiller-University Jena , Institute of Organic and Macromolecular Chemistry , Humboldtstraße 10 , 07743 Jena , Germany
| | - Robert S Mößel
- Friedrich-Schiller-University Jena , Institute of Organic and Macromolecular Chemistry , Humboldtstraße 10 , 07743 Jena , Germany
| | - Walid K Al-Jammal
- Friedrich-Schiller-University Jena , Institute of Organic and Macromolecular Chemistry , Humboldtstraße 10 , 07743 Jena , Germany
| | - Ivan Vilotijevic
- Friedrich-Schiller-University Jena , Institute of Organic and Macromolecular Chemistry , Humboldtstraße 10 , 07743 Jena , Germany
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21
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Wang J, Zhang Q, Li Y, Liu X, Li X, Cheng JP. Bi(OAc)3/chiral phosphoric acid catalyzed enantioselective allylation of isatins. Chem Commun (Camb) 2020; 56:261-264. [DOI: 10.1039/c9cc07944k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Herein, we disclosed an efficient protocol for the construction of chiral 3-allyl-3-hydroxyoxindoles via the enantioselective allylation reaction of isatins and allylboronates catalyzed by a simple binary acid Bi(OAc)3/CPA system under mild conditions.
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Affiliation(s)
- Jie Wang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Qingxia Zhang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Xiangshuai Liu
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
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22
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Morrison RJ, van der Mei FW, Romiti F, Hoveyda AH. A Catalytic Approach for Enantioselective Synthesis of Homoallylic Alcohols Bearing a Z-Alkenyl Chloride or Trifluoromethyl Group. A Concise and Protecting Group-Free Synthesis of Mycothiazole. J Am Chem Soc 2019; 142:436-447. [PMID: 31873000 DOI: 10.1021/jacs.9b11178] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A protecting group-free strategy is presented for diastereo- and enantioselective routes that can be used to prepare a wide variety of Z-homoallylic alcohols with significantly higher efficiency than is otherwise feasible. The approach entails the merger of several catalytic processes and is expected to facilitate the preparation of bioactive organic molecules. More specifically, Z-chloro-substituted allylic pinacolatoboronate is first obtained through stereoretentive cross-metathesis between Z-crotyl-B(pin) (pin = pinacolato) and Z-dichloroethene, both of which are commercially available. The organoboron compound may be used in the central transformation of the entire approach, an α- and enantioselective addition to an aldehyde, catalyzed by a proton-activated, chiral aminophenol-boryl catalyst. Catalytic cross-coupling can then furnish the desired Z-homoallylic alcohol in high enantiomeric purity. The olefin metathesis step can be carried out with substrates and a Mo-based complex that can be purchased. The aminophenol compound that is needed for the second catalytic step can be prepared in multigram quantities from inexpensive starting materials. A significant assortment of homoallylic alcohols bearing a Z-F3C-substituted alkene can also be prepared with similar high efficiency and regio-, diastereo-, and enantioselectivity. What is more, trisubstituted Z-alkenyl chloride moiety can be accessed with similar efficiency albeit with somewhat lower α-selectivity and enantioselectivity. The general utility of the approach is underscored by a succinct, protecting group-free, and enantioselective total synthesis of mycothiazole, a naturally occurring anticancer agent through a sequence that contains a longest linear sequence of nine steps (12 steps total), seven of which are catalytic, generating mycothiazole in 14.5% overall yield.
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Affiliation(s)
- Ryan J Morrison
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Farid W van der Mei
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Filippo Romiti
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States.,Supramolecular Science and Engineering Institute , University of Strasbourg, CNRS , Strasbourg 67000 , France
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States.,Supramolecular Science and Engineering Institute , University of Strasbourg, CNRS , Strasbourg 67000 , France
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23
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Brito GA, Jung WO, Yoo M, Krische MJ. Enantioselective Iridium-Catalyzed Allylation of Acetylenic Ketones via 2-Propanol-Mediated Reductive Coupling of Allyl Acetate: C14-C23 of Pladienolide D. Angew Chem Int Ed Engl 2019; 58:18803-18807. [PMID: 31490591 PMCID: PMC6917958 DOI: 10.1002/anie.201908939] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/26/2019] [Indexed: 11/10/2022]
Abstract
Highly enantioselective catalytic reductive coupling of allyl acetate with acetylenic ketones occurs in a chemoselective manner in the presence of aliphatic or aromatic ketones. This method was used to construct C14-C23 of pladienolide D in half the steps previously required.
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Affiliation(s)
- Gilmar A. Brito
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167 (USA)
| | - Woo-Ok Jung
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167 (USA)
| | - Minjin Yoo
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167 (USA)
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167 (USA)
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24
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Brito GA, Jung W, Yoo M, Krische MJ. Enantioselective Iridium‐Catalyzed Allylation of Acetylenic Ketones via 2‐Propanol‐Mediated Reductive Coupling of Allyl Acetate: C14‐C23 of Pladienolide D. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Gilmar A. Brito
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Woo‐Ok Jung
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Minjin Yoo
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Michael J. Krische
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
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25
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Klake RK, Gargaro SL, Gentry SL, Elele SO, Sieber JD. Development of a Strategy for Linear-Selective Cu-Catalyzed Reductive Coupling of Ketones and Allenes for the Synthesis of Chiral γ-Hydroxyaldehyde Equivalents. Org Lett 2019; 21:7992-7998. [PMID: 31532684 PMCID: PMC6781103 DOI: 10.1021/acs.orglett.9b02973] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
We report the development of a stereoselective
method for the allylation
of ketones utilizing N-substituted allyl equivalents
generated from a chiral allenamide. By choice of the appropriate ligand
for the Cu-catalyst, high linear selectivity can be obtained with
good diastereocontrol. This methodology allows access to chiral γ-hydroxyaldehyde
equivalents that were applied in the synthesis of chiral γ-lactones
and 2,5-disubstitued tetrahydrofurans.
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Affiliation(s)
- Raphael K Klake
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Samantha L Gargaro
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Skyler L Gentry
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Sharon O Elele
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
| | - Joshua D Sieber
- Department of Chemistry , Virginia Commonwealth University , 1001 West Main Street , Richmond , Virginia 23284-3028 , United States
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26
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Xie S, Li D, Huang H, Zhang F, Chen Y. Intermolecular Radical Addition to Ketoacids Enabled by Boron Activation. J Am Chem Soc 2019; 141:16237-16242. [DOI: 10.1021/jacs.9b09099] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shasha Xie
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Defang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
| | - Hanchu Huang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Fuyuan Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
| | - Yiyun Chen
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
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27
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Fager DC, Lee K, Hoveyda AH. Catalytic Enantioselective Addition of an Allyl Group to Ketones Containing a Tri-, a Di-, or a Monohalomethyl Moiety. Stereochemical Control Based on Distinctive Electronic and Steric Attributes of C-Cl, C-Br, and C-F Bonds. J Am Chem Soc 2019; 141:16125-16138. [PMID: 31553181 DOI: 10.1021/jacs.9b08443] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We disclose the results of an investigation designed to generate insight regarding the differences in the electronic and steric attributes of C-F, C-Cl, and C-Br bonds. Mechanistic insight has been gleaned by analysis of variations in enantioselectivity, regarding the ability of electrostatic contact between a halomethyl moiety and a catalyst's ammonium group as opposed to factors lowering steric repulsion and/or dipole minimization. In the process, catalytic and enantioselective methods have been developed for transforming a wide range of trihalomethyl (halogen = Cl or Br), dihalomethyl, or monohalomethyl (halogen = F, Cl, or Br) ketones to the corresponding tertiary homoallylic alcohols. By exploiting electrostatic attraction between a halomethyl moiety and the catalyst's ammonium moiety and steric factors, high enantioselectivity was attained in many instances. Reactions can be performed with 0.5-5.0 mol % of an in situ generated boryl-ammonium catalyst, affording products in 42-99% yield and up to >99:1 enantiomeric ratio. Not only are there no existing protocols for accessing the great majority of the resulting products enantioselectively but also in some cases there are hardly any instances of a catalytic enantioselective addition of a carbon-based nucleophile (e.g., one enzyme-catalyzed aldol addition involving trichloromethyl ketones, and none with dichloromethyl, tribromomethyl, or dibromomethyl ketones). The approach is scalable and offers an expeditious route to the enantioselective synthesis of versatile and otherwise difficult to access aldehydes that bear an α-halo-substituted quaternary carbon stereogenic center as well as an assortment of 2,2-disubstituted epoxides that contain an easily modifiable alkene. Tertiary homoallylic alcohols containing a triazole and a halomethyl moiety, structural units relevant to drug development, may also be accessed efficiently with exceptional enantioselectivity.
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Affiliation(s)
- Diana C Fager
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - KyungA Lee
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States.,Supramolecular Science and Engineering Institute , University of Strasbourg, CNRS , 67000 Strasbourg , France
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28
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Feng JJ, Xu Y, Oestreich M. Ligand-controlled diastereodivergent, enantio- and regioselective copper-catalyzed hydroxyalkylboration of 1,3-dienes with ketones. Chem Sci 2019; 10:9679-9683. [PMID: 32015801 PMCID: PMC6977547 DOI: 10.1039/c9sc03531a] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 08/17/2019] [Indexed: 12/20/2022] Open
Abstract
A ligand-controlled diastereodivergent copper-catalyzed borylative coupling between 1,3-dienes and ketones enables the enantioselective synthesis of densely functionalized tertiary homoallylic alcohols.
A copper-catalyzed three-component coupling of 1,3-dienes, bis(pinacolato)diboron, and ketones allows for the chemo-, regio-, diastereo- and enantioselective assembly of densely functionalized tertiary homoallylic alcohols. The relative configuration of the vicinal stereocenters is controlled by the chiral ligand employed. Subsequent transformations illustrate the versatility of these valuable chiral building blocks.
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Affiliation(s)
- Jian-Jun Feng
- Institut für Chemie , Technische Universität Berlin , Strasse des 17. Juni 115 , 10623 Berlin , Germany .
| | - Yan Xu
- Institut für Chemie , Technische Universität Berlin , Strasse des 17. Juni 115 , 10623 Berlin , Germany .
| | - Martin Oestreich
- Institut für Chemie , Technische Universität Berlin , Strasse des 17. Juni 115 , 10623 Berlin , Germany .
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29
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Li C, Liu RY, Jesikiewicz LT, Yang Y, Liu P, Buchwald SL. CuH-Catalyzed Enantioselective Ketone Allylation with 1,3-Dienes: Scope, Mechanism, and Applications. J Am Chem Soc 2019; 141:5062-5070. [PMID: 30817137 DOI: 10.1021/jacs.9b01784] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Chiral tertiary alcohols are important building blocks for the synthesis of pharmaceutical agents and biologically active natural products. The addition of carbon nucleophiles to ketones is the most common approach to tertiary alcohol synthesis but traditionally relies on stoichiometric organometallic reagents that are difficult to prepare, sensitive, and uneconomical. We describe a mild and efficient method for the copper-catalyzed allylation of ketones using widely available 1,3-dienes as allylmetal surrogates. Homoallylic alcohols bearing a wide range of functional groups are obtained in high yield and with good regio-, diastereo-, and enantioselectivity. Mechanistic investigations using density functional theory (DFT) implicate the in situ formation of a rapidly equilibrating mixture of isomeric copper(I) allyl complexes, from which Curtin-Hammett kinetics determine the major isomer of the product. A stereochemical model is provided to explain the high diastereo- and enantioselectivity of this process. Finally, this method was applied to the preparation of an important drug, ( R)-procyclidine, and a key intermediate in the synthesis of several pharmaceuticals.
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Affiliation(s)
- Chengxi Li
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Richard Y Liu
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Luke T Jesikiewicz
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Yang Yang
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Peng Liu
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Stephen L Buchwald
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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30
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Liu RY, Zhou Y, Yang Y, Buchwald SL. Enantioselective Allylation Using Allene, a Petroleum Cracking Byproduct. J Am Chem Soc 2019; 141:2251-2256. [PMID: 30685967 DOI: 10.1021/jacs.8b13907] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Allene (C3H4) gas is produced and separated on million-metric-ton scale per year during petroleum refining but is rarely employed in organic synthesis. Meanwhile, the addition of an allyl group (C3H5) to ketones is among the most common and prototypical reactions in synthetic chemistry. Herein, we report that the combination of allene gas with inexpensive and environmentally benign hydrosilanes, such as PMHS, can serve as a replacement for stoichiometric quantities of allylmetal reagents, which are required in most enantioselective ketone allylation reactions. This process is catalyzed by copper salts and commercially available ligands, operates without specialized equipment or pressurization, and tolerates a broad range of functional groups. Furthermore, the exceptional chemoselectivity of this catalyst system enables industrially relevant C3 hydrocarbon mixtures of allene with methylacetylene and propylene to be applied directly.
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Affiliation(s)
- Richard Y Liu
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Yujing Zhou
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Yang Yang
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Stephen L Buchwald
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
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31
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Gan XC, Yin L. Asymmetric Borylative Propargylation of Ketones Catalyzed by a Copper(I) Complex. Org Lett 2019; 21:931-936. [DOI: 10.1021/acs.orglett.8b03912] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xu-Cheng Gan
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Liang Yin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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32
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Niwa Y, Miyake M, Hayakawa I, Sakakura A. Catalytic enantioselective Hosomi–Sakurai reaction of α-ketoesters promoted by chiral copper(ii) complexes. Chem Commun (Camb) 2019; 55:3923-3926. [DOI: 10.1039/c9cc01159e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The first catalytic enantioselective Hosomi−Sakurai reaction of α-ketoesters.
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Affiliation(s)
- Yutaro Niwa
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
| | - Mayu Miyake
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
| | - Ichiro Hayakawa
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
| | - Akira Sakakura
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
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33
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Chai GL, Zhu B, Chang J. Synthesis and Application of Substituted 1,16-Dihydroxytetraphenylenes in Catalytic Asymmetric Allylboration of Ketones. J Org Chem 2018; 84:120-127. [DOI: 10.1021/acs.joc.8b02475] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guo-Li Chai
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Bo Zhu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Junbiao Chang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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34
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Liu YL, Lin XT. Recent Advances in Catalytic Asymmetric Synthesis of Tertiary Alcohols via
Nucleophilic Addition to Ketones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801023] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yun-Lin Liu
- School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 People's Republic of China
| | - Xiao-Tong Lin
- School of Chemistry and Chemical Engineering; Guangzhou University; Guangzhou 510006 People's Republic of China
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35
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Morrison RJ, Hoveyda AH. γ-, Diastereo-, and Enantioselective Addition of MEMO-Substituted Allylboron Compounds to Aldimines Catalyzed by Organoboron-Ammonium Complexes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805811] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Ryan J. Morrison
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Amir H. Hoveyda
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
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36
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Morrison RJ, Hoveyda AH. γ-, Diastereo-, and Enantioselective Addition of MEMO-Substituted Allylboron Compounds to Aldimines Catalyzed by Organoboron-Ammonium Complexes. Angew Chem Int Ed Engl 2018; 57:11654-11661. [PMID: 29969173 DOI: 10.1002/anie.201805811] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/02/2018] [Indexed: 01/21/2023]
Abstract
The first catalytic, broadly applicable, efficient, γ-, diastereo-, and enantioselective method for addition of O-substituted allyl-B(pin) compounds to phosphinoylimines (MEM=methoxyethoxymethyl, pin=pinacolato) is presented. The identity of the most effective catalyst and the optimal protecting group for the organoboron reagent were determined by consideration of the steric and electronic requirements at different stages of the catalytic cycle, namely, the generation of the chiral allylboronate, the subsequent 1,3-borotropic shift, and the addition step. Aryl-, heteroaryl-, alkenyl- and alkyl-substituted vicinal phosphinoylamido MEM-ethers were thus accessed in 57-92 % yield, 89:11 to >98:2 γ:α selectivity, 76:24-97:3 diastereomeric ratio, and 90:10-99:1 enantiomeric ratio. The method is scalable, and the phosphinoyl and MEM groups may be removed selectively or simultaneously. Utility is highlighted by enantioselective synthesis of an NK-1 receptor antagonist.
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Affiliation(s)
- Ryan J Morrison
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
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37
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Chang CA, Uang TY, Jian JH, Zhou MY, Chen ML, Kuo TS, Wu PY, Wu HL. Efficient and Enantioselective Rhodium(I)-Catalyzed Arylation of α-Ketoesters: Synthesis of (S
)-Flutriafol. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800575] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Chiung-An Chang
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
| | - Tsung-Ying Uang
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
| | - Jia-Hong Jian
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
| | - Meng-Yi Zhou
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
| | - Ming-Liang Chen
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
| | - Ting-Shen Kuo
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
| | - Ping-Yu Wu
- Oleader Technologies, Co., Ltd.; 1F., No. 8, Aly. 29, Ln. 335, Chenggong Rd., Hukou Township 30345 Hsinchu Taiwan
| | - Hsyueh-Liang Wu
- Department of Chemistry; National Taiwan Normal University; No. 88, Section 4, Tingzhou Road Taipei 11677 Taiwan
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38
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Selective Transformation of β-Disubstituted Enones and Ynones in the Presence of β-Monosubstituted Enones. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Tsai EY, Liu RY, Yang Y, Buchwald SL. A Regio- and Enantioselective CuH-Catalyzed Ketone Allylation with Terminal Allenes. J Am Chem Soc 2018; 140:2007-2011. [PMID: 29376366 PMCID: PMC5821421 DOI: 10.1021/jacs.7b12271] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report a method for the highly enantioselective CuH-catalyzed allylation of ketones that employs terminal allenes as allylmetal surrogates. Ketones and allenes bearing diverse and sensitive functional groups are efficiently coupled with high stereoselectivity and exclusive branched regioselectivity. In stoichiometric experiments, each elementary step of the proposed hydrocupration-addition-metathesis mechanism can be followed by NMR spectroscopy.
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Affiliation(s)
- Erica Y. Tsai
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Richard Y. Liu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yang Yang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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40
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Huang G, Diner C, Szabó KJ, Himo F. Mechanism and Stereoselectivity of the BINOL-Catalyzed Allylboration of Skatoles. Org Lett 2017; 19:5904-5907. [PMID: 29039676 DOI: 10.1021/acs.orglett.7b02901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Density functional theory calculations have been performed to investigate the binaphthol-catalyzed allylboration of skatoles. The high stereoselectivity observed for the reaction is reproduced well by the calculations and was found to be mainly a result of steric repulsions in the corresponding Zimmerman-Traxler transition states. The role of the additive MeOH in enhancing the stereoselectivity was also investigated and is suggested to promote the formation of less reactive allylboronic ester intermediates, thereby suppressing the formation of allylboroxine species, which undergo the facile racemic background reaction.
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Affiliation(s)
- Genping Huang
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University , Tianjin 300072, P. R. China
| | - Colin Diner
- Department of Organic Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden
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41
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Faggyas RJ, Calder EDD, Wilson C, Sutherland A. One-Pot Asymmetric Synthesis of Alkylidene 1-Alkylindan-1-ols Using Brønsted Acid and Palladium Catalysis. J Org Chem 2017; 82:11585-11593. [PMID: 28985675 DOI: 10.1021/acs.joc.7b02287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A one-pot catalytic enantioselective allylboration/Mizoroki-Heck reaction of 2-bromoaryl ketones has been developed for the asymmetric synthesis of 3-methyleneindanes bearing a tertiary alcohol center. Brønsted acid-catalyzed allylboration with a chiral BINOL derivative was followed by a palladium-catalyzed Mizoroki-Heck cyclization, resulting in selective formation of the exo-alkene. This novel protocol provides a concise and scalable approach to 1-alkyl-3-methyleneindan-1-ols in high enantiomeric ratios (up to 96:4 er). The potential of these compounds as chiral building blocks was demonstrated with efficient transformation to optically active diol and amino alcohol scaffolds.
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Affiliation(s)
- Réka J Faggyas
- WestCHEM, School of Chemistry, University of Glasgow , The Joseph Black Building, Glasgow G12 8QQ, United Kingdom
| | - Ewen D D Calder
- WestCHEM, School of Chemistry, University of Glasgow , The Joseph Black Building, Glasgow G12 8QQ, United Kingdom
| | - Claire Wilson
- WestCHEM, School of Chemistry, University of Glasgow , The Joseph Black Building, Glasgow G12 8QQ, United Kingdom
| | - Andrew Sutherland
- WestCHEM, School of Chemistry, University of Glasgow , The Joseph Black Building, Glasgow G12 8QQ, United Kingdom
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42
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Park J, Choi S, Lee Y, Cho SH. Chemo- and Stereoselective Crotylation of Aldehydes and Cyclic Aldimines with Allylic gem-Diboronate Ester. Org Lett 2017; 19:4054-4057. [DOI: 10.1021/acs.orglett.7b01821] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jinyoung Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seoyoung Choi
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Yeosan Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seung Hwan Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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43
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van der Mei FW, Qin C, Morrison RJ, Hoveyda AH. Practical, Broadly Applicable, α-Selective, Z-Selective, Diastereoselective, and Enantioselective Addition of Allylboron Compounds to Mono-, Di-, Tri-, and Polyfluoroalkyl Ketones. J Am Chem Soc 2017. [PMID: 28648084 DOI: 10.1021/jacs.7b05011] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A practical method for enantioselective synthesis of fluoroalkyl-substituted Z-homoallylic tertiary alcohols has been developed. Reactions may be performed with ketones containing a polylfluoro-, trifluoro-, difluoro-, and monofluoroalkyl group along with an aryl, a heteroaryl, an alkenyl, an alkynyl, or an alkyl substituent. Readily accessible unsaturated organoboron compounds serve as reagents. Transformations were performed with 0.5-2.5 mol % of a boron-based catalyst, generated in situ from a readily accessible valine-derived aminophenol and a Z- or an E-γ-substituted boronic acid pinacol ester. With a Z organoboron reagent, additions to trifluoromethyl and polyfluoroalkyl ketones proceeded in 80-98% yield, 97:3 to >98:2 α:γ selectivity, >95:5 Z:E selectivity, and 81:19 to >99:1 enantiomeric ratio. In notable contrast to reactions with unsubstituted allylboronic acid pinacol ester, additions to ketones with a mono- or a difluoromethyl group were highly enantioselective as well. Transformations were similarly efficient and α- and Z-selective when an E-allylboronate compound was used, but enantioselectivities were lower. In certain cases, the opposite enantiomer was favored (up to 4:96 er). With a racemic allylboronate reagent that contains an allylic stereogenic center, additions were exceptionally α-selective, affording products expected from γ-addition of a crotylboron compound, in up to 97% yield, 88:12 diastereomeric ratio, and 94:6 enantiomeric ratio. Utility is highlighted by gram-scale preparation of representative products through transformations that were performed without exclusion of air or moisture and through applications in stereoselective olefin metathesis where Z-alkene substrates are required. Mechanistic investigations aided by computational (DFT) studies and offer insight into different selectivity profiles.
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Affiliation(s)
- Farid W van der Mei
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Changming Qin
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Ryan J Morrison
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
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44
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Mszar NW, Mikus MS, Torker S, Haeffner F, Hoveyda AH. Electronically Activated Organoboron Catalysts for Enantioselective Propargyl Addition to Trifluoromethyl Ketones. Angew Chem Int Ed Engl 2017; 56:8736-8741. [PMID: 28560721 DOI: 10.1002/anie.201703844] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/15/2017] [Indexed: 11/11/2022]
Abstract
A broadly applicable, practical, scalable, efficient and highly α- and enantioselective method for addition of a silyl-protected propargyl moiety to trifluoromethyl ketones has been developed. Reactions, promoted by 2.0 mol % of a catalyst that is derived in situ from a readily accessible aminophenol compound at ambient temperature, were complete after only 15 minutes at room temperature. The desired tertiary alcohols were isolated in up to 97 % yield and 98.5:1.5 enantiomeric ratio. Alkyl-, alkenyl-, alkynyl-, aryl- or heteroaryl-substituted trifluoromethyl ketones can be used. Utility is highlighted by application to a transformation that is relevant to enantioselective synthesis of BI 653048, a compound active against rheumatoid arthritis.
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Affiliation(s)
- Nicholas W Mszar
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Malte S Mikus
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Amir H Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
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45
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Mszar NW, Mikus MS, Torker S, Haeffner F, Hoveyda AH. Electronically Activated Organoboron Catalysts for Enantioselective Propargyl Addition to Trifluoromethyl Ketones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703844] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Nicholas W. Mszar
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Malte S. Mikus
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Sebastian Torker
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Fredrik Haeffner
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
| | - Amir H. Hoveyda
- Department of Chemistry; Merkert Chemistry Center; Boston College; Chestnut Hill MA 02467 USA
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46
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Brauns M, Mantel M, Schmauck J, Guder M, Breugst M, Pietruszka J. Highly Enantioselective Allylation of Ketones: An Efficient Approach to All Stereoisomers of Tertiary Homoallylic Alcohols. Chemistry 2017; 23:12136-12140. [PMID: 28423201 DOI: 10.1002/chem.201701740] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Indexed: 12/15/2022]
Abstract
An optimized protecting group for allylboronates allowed the use of ketones in order to synthesize all isomers of quaternary homoallylic alcohols with high enantioselectivities. All symmetric isomers of the allylboronate were prepared in high yields and diastereoselectivities using Sn 2' reactions. The improved reactivity of the novel protecting group was verified by following the reaction kinetics with 1 H NMR spectroscopy. Mechanistic studies using DFT calculations were conducted to investigate the new findings. Thus, the stereochemical outcome and enhanced reactivity can be rationalized.
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Affiliation(s)
- Marcus Brauns
- Institut für Bioorganische Chemie der Heinrich Heine Universität im, Forschungszentrum Jülich, Stetternicher Forst, Geb. 15.8, 52426, Jülich, Germany
| | - Marvin Mantel
- Institut für Bioorganische Chemie der Heinrich Heine Universität im, Forschungszentrum Jülich, Stetternicher Forst, Geb. 15.8, 52426, Jülich, Germany
| | - Julie Schmauck
- Department für Chemie, Universität zu Köln, Greinstraße 4, 50939, Köln, Germany
| | - Marian Guder
- Institut für Bio- und Geowissenschaften (IBG-1: Biotechnologie), Forschungszentrum Jülich, 52428, Jülich, Germany
| | - Martin Breugst
- Department für Chemie, Universität zu Köln, Greinstraße 4, 50939, Köln, Germany
| | - Jörg Pietruszka
- Institut für Bioorganische Chemie der Heinrich Heine Universität im, Forschungszentrum Jülich, Stetternicher Forst, Geb. 15.8, 52426, Jülich, Germany.,Institut für Bio- und Geowissenschaften (IBG-1: Biotechnologie), Forschungszentrum Jülich, 52428, Jülich, Germany
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47
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Tan Q, Wang X, Xiong Y, Zhao Z, Li L, Tang P, Zhang M. Chiral Amino Alcohol Accelerated and Stereocontrolled Allylboration of Iminoisatins: Highly Efficient Construction of Adjacent Quaternary Stereogenic Centers. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700581] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Qiuyuan Tan
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Xinqiao Wang
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Yang Xiong
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Zimeng Zhao
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Lu Li
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Pei Tang
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Min Zhang
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
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48
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Tan Q, Wang X, Xiong Y, Zhao Z, Li L, Tang P, Zhang M. Chiral Amino Alcohol Accelerated and Stereocontrolled Allylboration of Iminoisatins: Highly Efficient Construction of Adjacent Quaternary Stereogenic Centers. Angew Chem Int Ed Engl 2017; 56:4829-4833. [DOI: 10.1002/anie.201700581] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Indexed: 01/26/2023]
Affiliation(s)
- Qiuyuan Tan
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Xinqiao Wang
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Yang Xiong
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Zimeng Zhao
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Lu Li
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Pei Tang
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Min Zhang
- Innovative Drug Research Centre; School of Pharmaceutical Sciences; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
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49
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Bieszczad B, Gilheany DG. Asymmetric Grignard Synthesis of Tertiary Alcohols through Rational Ligand Design. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201610462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bartosz Bieszczad
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; Belfield Dublin 4 Ireland
| | - Declan G. Gilheany
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; Belfield Dublin 4 Ireland
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50
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Bieszczad B, Gilheany DG. Asymmetric Grignard Synthesis of Tertiary Alcohols through Rational Ligand Design. Angew Chem Int Ed Engl 2017; 56:4272-4276. [DOI: 10.1002/anie.201610462] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 02/12/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Bartosz Bieszczad
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; Belfield Dublin 4 Ireland
| | - Declan G. Gilheany
- Centre for Synthesis and Chemical Biology; School of Chemistry; University College Dublin; Belfield Dublin 4 Ireland
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