201
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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: 63] [Impact Index Per Article: 9.0] [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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202
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Hoang GL, Takacs JM. Enantioselective γ-borylation of unsaturated amides and stereoretentive Suzuki-Miyaura cross-coupling. Chem Sci 2017; 8:4511-4516. [PMID: 28758006 PMCID: PMC5514528 DOI: 10.1039/c7sc01093a] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 04/19/2017] [Indexed: 01/06/2023] Open
Abstract
The rhodium-catalyzed, directed catalytic asymmetric hydroboration of γ,δ-unsaturated amides affords a direct route to chiral acyclic secondary γ-borylated carbonyl derivatives in high enantiomeric purity. In contrast to a similar β-borylated amide derivative, the γ-borylated amide undergoes Suzuki-Miyaura cross-coupling with stereoretention. The utility of the boronic ester products is further illustrated by other stereospecific C-B bond transformations leading to γ-amino acid derivatives, 1,4-amino alcohols, and 5-substituted-γ-lactone and γ-lactam ring systems.
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Affiliation(s)
- Gia L Hoang
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , NE 68588-0304 , USA .
| | - James M Takacs
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , NE 68588-0304 , USA .
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203
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Liu YL, Kehr G, Daniliuc CG, Erker G. Metal-Free Arene and Heteroarene Borylation Catalyzed by Strongly Electrophilic Bis-boranes. Chemistry 2017; 23:12141-12144. [DOI: 10.1002/chem.201701771] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Yun-Lin Liu
- Organisch-Chemisches Institut; Universität Münster; Corrensstr. 40 48149 Münster Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut; Universität Münster; Corrensstr. 40 48149 Münster Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut; Universität Münster; Corrensstr. 40 48149 Münster Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut; Universität Münster; Corrensstr. 40 48149 Münster Germany
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204
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Miura T, Nakahashi J, Murakami M. Enantioselective Synthesis of (E
)-δ-Boryl-Substituted anti
-Homoallylic Alcohols Using Palladium and a Chiral Phosphoric Acid. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702611] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry; Kyoto University; Katsura Kyoto 615-8510 Japan
| | - Junki Nakahashi
- Department of Synthetic Chemistry and Biological Chemistry; Kyoto University; Katsura Kyoto 615-8510 Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry; Kyoto University; Katsura Kyoto 615-8510 Japan
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205
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Miura T, Nakahashi J, Murakami M. Enantioselective Synthesis of (E)-δ-Boryl-Substituted anti-Homoallylic Alcohols Using Palladium and a Chiral Phosphoric Acid. Angew Chem Int Ed Engl 2017; 56:6989-6993. [PMID: 28488388 DOI: 10.1002/anie.201702611] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Indexed: 12/12/2022]
Abstract
(E)-δ-Boryl-substituted anti-homoallylic alcohols are synthesized in a highly diastereo- and enantioselective manner from 1,1-di(boryl)alk-3-enes and aldehydes. Mechanistically, the reaction consists of 1) palladium-catalyzed double-bond transposition of the 1,1-di(boryl)alk-3-enes to 1,1-di(boryl)alk-2-enes, 2) chiral phosphoric acid catalyzed allylation of aldehydes, and 3) palladium-catalyzed geometrical isomerization from the Z to E isomer. As a result, the configurations of two chiral centers and one double bond are all controlled with high selectivity in a single reaction vessel.
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Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Junki Nakahashi
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
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206
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Allais C, Roush WR. Enantio- and Diastereoselective Synthesis of 1,5-syn-(Z)-Amino Alcohols via Imine Double Allylboration: Synthesis of trans-1,2,3,6-Tetrahydropyridines and Total Synthesis of Andrachcine. Org Lett 2017; 19:2646-2649. [DOI: 10.1021/acs.orglett.7b00995] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Christophe Allais
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, United States
| | - William R. Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, United States
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207
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Edelstein EK, Namirembe S, Morken JP. Enantioselective Conjunctive Cross-Coupling of Bis(alkenyl)borates: A General Synthesis of Chiral Allylboron Reagents. J Am Chem Soc 2017; 139:5027-5030. [PMID: 28335597 DOI: 10.1021/jacs.7b01774] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium-catalyzed conjunctive cross-coupling is used for the synthesis of enantioenriched allylboron reagents. This reaction employs nonsymmetric bis(alkenyl)borates as substrates and appears to occur by a mechanism that involves selective activation of the less substituted alkene followed by migration of the more substituted alkene during the course of a Pd-induced metalate rearrangement.
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Affiliation(s)
- Emma K Edelstein
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - Sheila Namirembe
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
| | - James P Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College , Chestnut Hill, Massachusetts 02467, United States
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208
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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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209
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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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210
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Wang D, Szabó KJ. Copper-Catalyzed, Stereoselective Cross-Coupling of Cyclic Allyl Boronic Acids with α-Diazoketones. Org Lett 2017; 19:1622-1625. [DOI: 10.1021/acs.orglett.7b00433] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Dong Wang
- 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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211
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Mao L, Szabó KJ, Marder TB. Synthesis of Benzyl-, Allyl-, and Allenyl-boronates via Copper-Catalyzed Borylation of Alcohols. Org Lett 2017; 19:1204-1207. [DOI: 10.1021/acs.orglett.7b00256] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lujia Mao
- Institut für Anorganische Chemie, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Kálmán J. Szabó
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Todd B. Marder
- Institut für Anorganische Chemie, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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212
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Zhou Y, Wang H, Liu Y, Zhao Y, Zhang C, Qu J. Iron-catalyzed boration of allylic esters: an efficient approach to allylic boronates. Org Chem Front 2017. [DOI: 10.1039/c7qo00228a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first general iron-catalyzed boration of allylic esters has been developed.
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Affiliation(s)
- Yuhan Zhou
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P.R. China
| | - Huan Wang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P.R. China
| | - Yang Liu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P.R. China
| | - Yilong Zhao
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P.R. China
| | - Chunxia Zhang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P.R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P.R. China
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213
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Xuan Q, Wei Y, Chen J, Song Q. An expedient E-stereoselective synthesis of multi-substituted functionalized allylic boronates from Morita–Baylis–Hillman alcohols. Org Chem Front 2017. [DOI: 10.1039/c7qo00253j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Various functionalized tri-substituted allylic boronates were synthesized through borylation of Morita–Baylis–Hillman alcohols under the catalysis of Cu(OTf)2 at ambient temperature.
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Affiliation(s)
- Qingqing Xuan
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- China
| | - Yahui Wei
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- China
| | | | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering at Huaqiao University
- Xiamen
- China
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