1
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Gong Z, Smith A, Farah AO, Dickerson SD, González-Montiel GA, Laddusaw JM, Cheong PHY, Wiskur SL. Investigating Substituent Interactions with Cationic Catalysts. J Org Chem 2023. [PMID: 37993265 DOI: 10.1021/acs.joc.3c01721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Rates of isothiourea catalyzed silylation and acylation reactions were measured for substrates with various electronic substituents at the aryl group. Through these measurements, the intermolecular interactions between cationic catalyst intermediates and different aryl groups were explored. These studies were performed to understand how changes in the catalyst structure affected electrostatic intermolecular interactions. Three different catalysts (N-methylimidazole and two isothioureas) were employed that varied in their ability to delocalize their cationic nature. The results show that more delocalization on the catalyst reduces the sensitivity to the electronics on the aryl group. Surprisingly, the isothiourea with a fused benzene ring provided additional points of interaction with groups that contained lone-pairs, significantly affecting the overall rate. This work helps explore the interactions that dominate in these types of catalytic systems, to aid in future organocatalysis development. Density functional theory (DFT) studies further confirmed isothiourea/aryl ring interaction with the alcohol substrate in the acylation process, which confirmed these hypotheses. Electron rich or lone-pair bearing functional groups stabilize the cationic catalyst core, thereby stabilizing the transition states and accelerating the reaction. It was also discovered that in one case, the formation of a stable substrate dimer was responsible for its lower reactivity.
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Affiliation(s)
- Ziyuan Gong
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, GSRC 109, Columbia, South Carolina 29206, United States
| | - Alberto Smith
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, GSRC 109, Columbia, South Carolina 29206, United States
| | - Abdikani Omar Farah
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Shelby D Dickerson
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, GSRC 109, Columbia, South Carolina 29206, United States
| | - Gisela A González-Montiel
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Jacqueline M Laddusaw
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Sheryl L Wiskur
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, GSRC 109, Columbia, South Carolina 29206, United States
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2
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Yamada KI, Yamauchi A, Fujiwara T, Hashimoto K, Wang Y, Kuwano S, Inokuma T. Kinetic Resolution of α‐Hydroxyamide via N‐Heterocyclic Carbene‐Catalyzed Acylation. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ken-ichi Yamada
- Tokushima University Graduate School of Pharmaceutical Sciences Shomachi 770-8505 Tokushima JAPAN
| | - Akiho Yamauchi
- University of Tokushima: Tokushima Daigaku Graduate School of Pharmaceutical Sciences JAPAN
| | - Tatsuya Fujiwara
- University of Tokushima: Tokushima Daigaku Graduate School of Pharmaceutical Sciences JAPAN
| | - Keiji Hashimoto
- University of Tokushima: Tokushima Daigaku Graduate School of Pharmaceutical Sciences JAPAN
| | - Yinli Wang
- University of Tokushima: Tokushima Daigaku Graduate School of Pharmaceutical Sciences JAPAN
| | - Satoru Kuwano
- Kyoto University: Kyoto Daigaku Graduate School of Pharmaceutical Sciences JAPAN
| | - Tsubasa Inokuma
- University of Tokushima: Tokushima Daigaku Graduate School of Pharmaceutical Sciences JAPAN
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3
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Smirnov M, Kucherenko A, Gridnev I, Korlyukov AA, Zlotin S. γ‐Pyronecarbaldehyde‐Based Practical Asymmetric Catalytic Synthesis of Chiral 2,4‐Dihydroxycarboxylic Acids and α‐Hydroxy‐γ‐lactones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Maxim Smirnov
- Zelinsky Institute of Organic Chemistry RAS RUSSIAN FEDERATION
| | | | - Ilya Gridnev
- Zelinsky Institute of Organic Chemistry RAS RUSSIAN FEDERATION
| | | | - Sergei Zlotin
- N.D.Zelinsky Institute of Organic Chemistry RUSSIAN FEDERATION
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4
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Miyazaki K, Nakata K. Two-Step Kinetic Resolution of Racemic Secondary Benzylic Alcohols Using the Combination of Enantioselective Silylation and Acylation: One-Pot Procedure Catalyzed by Chiral Guanidine. J Org Chem 2022; 87:10509-10515. [DOI: 10.1021/acs.joc.2c01129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kanako Miyazaki
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu Matsue, Shimane 690-8504, Japan
| | - Kenya Nakata
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu Matsue, Shimane 690-8504, Japan
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5
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Wang Y, Yamauchi A, Hashimoto K, Fujiwara T, Inokuma T, Mitani Y, Ute K, Kuwano S, Yamaoka Y, Takasu K, Yamada KI. Enhanced Molecular Recognition through Substrate–Additive Complex Formation in N-Heterocyclic-Carbene-Catalyzed Kinetic Resolution of α-Hydroxythioamides. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yinli Wang
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Akiho Yamauchi
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan
| | - Keiji Hashimoto
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan
| | - Tatsuya Fujiwara
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan
| | - Tsubasa Inokuma
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan
- Research Cluster on “Innovative Chemical Sensing”, Tokushima University,
Shomachi, Tokushima 770-8505, Japan
| | - Yuta Mitani
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan
| | - Koichi Ute
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan
| | - Satoru Kuwano
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yousuke Yamaoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kiyosei Takasu
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ken-ichi Yamada
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan
- Research Cluster on “Innovative Chemical Sensing”, Tokushima University,
Shomachi, Tokushima 770-8505, Japan
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6
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Redden BK, Clark RW, Gong Z, Rahman MM, Peryshkov DV, Wiskur SL. Mechanistic investigations of alcohol silylation with isothiourea catalysts. Org Biomol Chem 2021; 19:10181-10188. [PMID: 34787145 DOI: 10.1039/d1ob01732b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of the asymmetric silylation of alcohols with isothiourea catalysts was studied by employing reaction progress kinetic analysis. These reactions were developed by the Wiskur group, and use triphenyl silyl chloride and chiral isothiourea catalysts to silylate the alcohols. While the order of most reaction components was as expected (catalyst, amine base, alcohol), the silyl chloride was determined to be a higher order. This suggested a multistep mechanism between the catalyst and silyl chloride, with the second equivalent of silyl chloride assisting in the formation of the reactive intermediate leading to the rate-determining step. Through the addition of additives and investigating changes in the silyl chloride, an understanding of the catalyst equilibrium emerged for this reaction and provided pathways for further reaction development.
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Affiliation(s)
- Brandon K Redden
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA.
| | - Robert W Clark
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA.
| | - Ziyuan Gong
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA.
| | - Md Mamdudur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA.
| | - Dmitry V Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA.
| | - Sheryl L Wiskur
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA.
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7
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Suzuki T, Iwakura M, Nakata K. Highly Efficient Silylative Kinetic Resolution of Racemic
trans
‐2‐Alkyl‐1‐indanols Catalyzed by Chiral Guanidine. ChemistrySelect 2021. [DOI: 10.1002/slct.202103341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takeshi Suzuki
- Department of Chemistry Graduate School of Natural Science and Technology Shimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
| | - Manaya Iwakura
- Department of Chemistry Graduate School of Natural Science and Technology Shimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
| | - Kenya Nakata
- Department of Chemistry Graduate School of Natural Science and Technology Shimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
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8
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Milic M, Targos K, Tellez Chavez M, Thompson MAM, Jennings JJ, Franz AK. NMR Quantification of Hydrogen-Bond-Accepting Ability for Organic Molecules. J Org Chem 2021; 86:6031-6043. [PMID: 33880918 DOI: 10.1021/acs.joc.0c02876] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The hydrogen-bond-accepting abilities for more than 100 organic molecules are quantified using 19F and 31P NMR spectroscopy with pentafluorobenzoic acid (PFBA) and phenylphosphinic acid (PPA) as commercially available, inexpensive probes. Analysis of pyridines and anilines with a variety of electronic modifications demonstrates that changes in NMR shifts can predict the secondary effects that contribute to H-bond-accepting ability, establishing the ability of PFBA and PPA binding to predict electronic trends. The H-bond-accepting abilities of various metal-chelating ligands and organocatalysts are also quantified. The measured Δδ(31P) and Δδp(19F) values correlate strongly with Hammett parameters, pKa of the protonated HBA, and proton-transfer basicity (pKBH+).
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Affiliation(s)
- Mira Milic
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Karina Targos
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Magda Tellez Chavez
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Madison A M Thompson
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Julia J Jennings
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Annaliese K Franz
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
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9
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Papadopulu Z, Oestreich M. Kinetic Resolution of Neopentylic Secondary Alcohols by Cu-H-Catalyzed Enantioselective Silylation with Hydrosilanes. Org Lett 2021; 23:438-441. [PMID: 33356324 DOI: 10.1021/acs.orglett.0c03943] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A nonenzymatic kinetic resolution of sterically congested alcohols having a quaternary carbon atom in the β-position is reported. The catalyst system CuCl/NaOtBu/(R,R)-Ph-BPE together with a 3,5-xylyl-substituted tertiary hydrosilane enable enantioselective silylation of the hydroxy group. Several alcohols are obtained with good to excellent selectivity factors, and there are no other known straightforward methods to access these motifs.
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Affiliation(s)
- Zaneta Papadopulu
- 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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10
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Seliger J, Oestreich M. Dynamic Kinetic Resolution of Alcohols by Enantioselective Silylation Enabled by Two Orthogonal Transition-Metal Catalysts. Angew Chem Int Ed Engl 2021; 60:247-251. [PMID: 33107692 PMCID: PMC7821270 DOI: 10.1002/anie.202010484] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/28/2020] [Indexed: 12/04/2022]
Abstract
A nonenzymatic dynamic kinetic resolution of acyclic and cyclic benzylic alcohols is reported. The approach merges rapid transition-metal-catalyzed alcohol racemization and enantioselective Cu-H-catalyzed dehydrogenative Si-O coupling of alcohols and hydrosilanes. The catalytic processes are orthogonal, and the racemization catalyst does not promote any background reactions such as the racemization of the silyl ether and its unselective formation. Often-used ruthenium half-sandwich complexes are not suitable but a bifunctional ruthenium pincer complex perfectly fulfills this purpose. By this, enantioselective silylation of racemic alcohol mixtures is achieved in high yields and with good levels of enantioselection.
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Affiliation(s)
- Jan Seliger
- Institut für ChemieTechnische Universität BerlinStrasse des 17. Juni 11510623BerlinGermany
| | - Martin Oestreich
- Institut für ChemieTechnische Universität BerlinStrasse des 17. Juni 11510623BerlinGermany
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11
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Seliger J, Oestreich M. Dynamische kinetische Racematspaltung von Alkoholen mittels enantioselektiver Silylierung ermöglicht durch zwei orthogonale Übergangsmetallkatalysatoren. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jan Seliger
- Institut für Chemie Technische Universität Berlin Straße des 17. Juni 115 10623 Berlin Deutschland
| | - Martin Oestreich
- Institut für Chemie Technische Universität Berlin Straße des 17. Juni 115 10623 Berlin Deutschland
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12
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Procházková E, Filo J, Cigáň M, Baszczyňski O. Sterically-Controlled Self-Immolation in Phosphoramidate Linkers Triggered by Light. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901882] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Eliška Procházková
- Institute of Organic Chemistry and Biochemistry; The Czech Academy of Sciences, Flemingovo nám. 542/2; 116 10 Prague Czech Republic
| | - Juraj Filo
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University, Ilkovičova 6; Bratislava 842 15 Slovakia
| | - Marek Cigáň
- Institute of Chemistry, Faculty of Natural Sciences; Comenius University, Ilkovičova 6; Bratislava 842 15 Slovakia
| | - Ondřej Baszczyňski
- Department of Organic Chemistry, Faculty of Science; Charles University, Hlavova 2030/8; 128 43 Prague Czech Republic
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13
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Bourgeois F, Medlock JA, Bonrath W, Sparr C. Catalyst Repurposing Sequential Catalysis by Harnessing Regenerated Prolinamide Organocatalysts as Transfer Hydrogenation Ligands. Org Lett 2020; 22:110-115. [PMID: 31833781 DOI: 10.1021/acs.orglett.9b04033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A catalyst repurposing strategy based on a sequential aldol addition and transfer hydrogenation giving access to enantiomerically enriched α-hydroxy-γ-butyrolactones is described. The combination of a stereoselective, organocatalytic step, followed by an efficient catalytic aldehyde reduction induces an ensuing lactonization to provide enantioenriched butyrolactones from readily available starting materials. By capitalizing from the capacity of prolineamides to act as both an organocatalyst and a transfer hydrogenation ligand, catalyst repurposing allowed the development of an operationally simple, economic, and efficient sequential catalysis approach.
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Affiliation(s)
- Frederic Bourgeois
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | | | - Werner Bonrath
- DSM Nutritional Products Ltd. , P.O. Box 2676, 4002 Basel , Switzerland
| | - Christof Sparr
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
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14
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Wang C, Li SJ, Zhang M, Wei D, Ding L. Origin of stereoselectivity in an isothiourea catalyzed Michael addition reaction of aryl ester with vinyl disulfone. NEW J CHEM 2020. [DOI: 10.1039/d0nj03540h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The origin of stereoselectivity in an isothiourea-catalyzed addition reaction of aryl ester with vinyl disulfone was explored for the first time.
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Affiliation(s)
- Congcong Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province
- Key Laboratory of Technology of Drug Preparation (Zhengzhou University)
- Ministry of Education of China
- Key Laboratory of Henan Province for Drug Quality and Evaluation, School of Pharmaceutical Sciences
- Zhengzhou University
| | - Shi-Jun Li
- College of Chemistry, and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Min Zhang
- College of Chemistry, and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Donghui Wei
- College of Chemistry, and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Lina Ding
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province
- Key Laboratory of Technology of Drug Preparation (Zhengzhou University)
- Ministry of Education of China
- Key Laboratory of Henan Province for Drug Quality and Evaluation, School of Pharmaceutical Sciences
- Zhengzhou University
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15
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Zhang T, Dickerson SD, Zhu T, Tang C, Wiskur SL. Polymer compositions on kinetic resolution of secondary alcohols using polymer-supported silyl chlorides. Polym Chem 2020. [DOI: 10.1039/d0py00747a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Modulating the polarity of the polymer backbone affects the selectivity of asymmetric silylation.
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Affiliation(s)
- Tian Zhang
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Shelby D. Dickerson
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Tianyu Zhu
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Chuanbing Tang
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Sheryl L. Wiskur
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
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16
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Yoshimatsu S, Nakata K. Silylative Kinetic Resolution of Racemic 2,2‐Dialkyl 5‐ and 6‐Membered Cyclic Benzylic Alcohol Derivatives Catalyzed by Chiral Guanidine, (
R
)‐
N
‐Methylbenzoguanidine. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900761] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuhei Yoshimatsu
- Department of Chemistry, Graduate School of Natural Science and TechnologyShimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
| | - Kenya Nakata
- Department of Chemistry, Graduate School of Natural Science and TechnologyShimane University 1060 Nishikawatsu Matsue Shimane 690-8504 Japan
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17
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Zhang T, Redden BK, Wiskur SL. Investigation of Electrostatic Interactions towards Controlling Silylation-Based Kinetic Resolutions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Tian Zhang
- Department of Chemistry and Biochemistry; University of South Carolina; 631 Sumter St. 29208 Columbia SC USA
| | - Brandon K. Redden
- Department of Chemistry and Biochemistry; University of South Carolina; 631 Sumter St. 29208 Columbia SC USA
| | - Sheryl L. Wiskur
- Department of Chemistry and Biochemistry; University of South Carolina; 631 Sumter St. 29208 Columbia SC USA
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18
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Seliger J, Oestreich M. Making the Silylation of Alcohols Chiral: Asymmetric Protection of Hydroxy Groups. Chemistry 2019; 25:9358-9365. [PMID: 30919539 DOI: 10.1002/chem.201900792] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Indexed: 11/11/2022]
Abstract
The non-enzymatic kinetic resolution of racemic mixtures of alcohols by silylation had been unknown before the turn of the century. This stands in stark contrast to established acylation techniques. The same applies to the related desymmetrization of diols. This might come as a surprise, given the significance of silyl ethers as protecting groups in multistep synthesis of complex molecules. The situation changed after a seminal report by Ishikawa nearly twenty years ago. Since then, enantioselective silylation of alcohols has matured and grown into an independent research field with organocatalytic and transition-metal-catalyzed approaches providing powerful solutions. This Minireview summarizes these recent advances with particular emphasis on the stereoselective dehydrogenative coupling of alcohols and hydrosilanes.
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Affiliation(s)
- Jan Seliger
- 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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19
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Dong X, Kita Y, Oestreich M. Kinetische Racematspaltung α‐hydroxysubstituierter Oximether durch enantioselektive Cu‐H‐katalysierte Si‐O‐Kupplung. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802947] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Xichang Dong
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 115 10623 Berlin Deutschland
| | - Yuji Kita
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 115 10623 Berlin Deutschland
| | - Martin Oestreich
- Institut für ChemieTechnische Universität Berlin Straße des 17. Juni 115 10623 Berlin Deutschland
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20
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Dong X, Kita Y, Oestreich M. Kinetic Resolution of α‐Hydroxy‐Substituted Oxime Ethers by Enantioselective Cu−H‐Catalyzed Si−O Coupling. Angew Chem Int Ed Engl 2018; 57:10728-10731. [DOI: 10.1002/anie.201802947] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Xichang Dong
- Institut für ChemieTechnische Universität Berlin Strasse des 17. Juni 115 10623 Berlin Germany
| | - Yuji Kita
- Institut für ChemieTechnische Universität Berlin Strasse des 17. Juni 115 10623 Berlin Germany
| | - Martin Oestreich
- Institut für ChemieTechnische Universität Berlin Strasse des 17. Juni 115 10623 Berlin Germany
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21
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Shi Q, Zhang W, Wang Y, Qu L, Wei D. Insights into the isothiourea-catalyzed asymmetric [4 + 2] annulation of phenylacetic acid with alkylidene pyrazolone. Org Biomol Chem 2018. [DOI: 10.1039/c7ob03142d] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A computational study on the isothiourea-catalyzed asymmetric [4 + 2] annulation of phenylacetic acid with alkylidene pyrazolone was performed using the DFT method.
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Affiliation(s)
- Qianqian Shi
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Wei Zhang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Lingbo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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22
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Yoshimatsu S, Yamada A, Nakata K. Silylative Kinetic Resolution of Racemic 1-Indanol Derivatives Catalyzed by Chiral Guanidine. J Org Chem 2017; 83:452-458. [DOI: 10.1021/acs.joc.7b02493] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shuhei Yoshimatsu
- Department of Material Science,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu Matsue, Shimane 690-8504, Japan
| | - Akira Yamada
- Department of Material Science,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu Matsue, Shimane 690-8504, Japan
| | - Kenya Nakata
- Department of Material Science,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu Matsue, Shimane 690-8504, Japan
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23
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Broad-spectrum kinetic resolution of alcohols enabled by Cu-H-catalysed dehydrogenative coupling with hydrosilanes. Nat Commun 2017; 8:15547. [PMID: 28569754 PMCID: PMC5461486 DOI: 10.1038/ncomms15547] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 04/07/2017] [Indexed: 11/08/2022] Open
Abstract
The enantioselective silylation of racemic alcohols, where one enantiomer reacts faster than the other, is an alternative approach to established enzymatic and non-enzymatic acylation techniques. The existing art is either limited to structurally biased alcohols or requires elaborate catalysts. Simple substrates, such as benzylic and allylic alcohols, with no coordinating functionality in the proximity of the hydroxy group have been challenging in these kinetic resolutions. We report here the identification of a broadly applicable chiral catalyst for the enantioselective dehydrogenative coupling of alcohols and hydrosilanes with both the chiral ligand and the hydrosilane being commercially available. The efficiency of kinetic resolutions is characterized by the selectivity factor, that is, the ratio of the reaction rates of the fast-reacting over the slow-reacting enantiomer. The selectivity factors achieved with the new method are good for acyclic benzylic alcohols (≤170) and high for synthetically usefully cyclic benzylic (≤40.1) and allylic alcohols (≤159). Kinetic resolution of alcohols by silylation is an attractive method to produce enantiopure compounds, but known systems often display limited substrate scope. Here the authors report a copper catalysed enantioselective dehydrogenative silylation of alcohols that have high selectivity across a broad range of substrates.
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24
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Wang S, Izquierdo J, Rodríguez-Escrich C, Pericàs MA. Asymmetric [4 + 2] Annulation Reactions Catalyzed by a Robust, Immobilized Isothiourea. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00360] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shoulei Wang
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Javier Izquierdo
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Carles Rodríguez-Escrich
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona, 08080 Barcelona, Spain
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25
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Wang L, Zhang T, Redden BK, Sheppard CI, Clark RW, Smith MD, Wiskur SL. Understanding Internal Chirality Induction of Triarylsilyl Ethers Formed from Enantiopure Alcohols. J Org Chem 2016; 81:8187-93. [PMID: 27501133 DOI: 10.1021/acs.joc.6b01137] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chirality transmission from point chirality to helical chirality was explored using triarylsilyl ethers. Circular dichroism (CD) spectroscopy was employed to show that the alcohol stereocenter of silylated, enantiopure secondary alcohols can transmit chirality to the aryl groups on the silicon resulting in a higher population of one helical conformation over another. Cotton effects characteristic of the aryl groups organized into one preferred conformation were observed for all of the compounds examined, which included both triphenyl- and trinaphthylsilyl groups. Alcohols with an R configuration typically induced a PMP helical twist, while an S configuration induced a MPM helical twist. Molecular modeling combined with solid-state structures also gave evidence signifying that point chirality adjacent to triphenylsilyl groups could bias the conformation of the phenyl groups. This work helps in our understanding of the origin of selectivity in our silylation-based kinetic resolutions and a role the phenyl groups play in that selectivity.
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Affiliation(s)
- Li Wang
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Tian Zhang
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Brandon K Redden
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Cody I Sheppard
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Robert W Clark
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Mark D Smith
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
| | - Sheryl L Wiskur
- University of South Carolina , 631 Sumter Street, Columbia, South Carolina 29208, United States
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26
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Merad J, Pons JM, Chuzel O, Bressy C. Enantioselective Catalysis by Chiral Isothioureas. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600399] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jérémy Merad
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
| | - Jean-Marc Pons
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
| | - Olivier Chuzel
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
| | - Cyril Bressy
- Aix Marseille Université, Centrale Marseille; CNRS, iSm2 UMR 7313; 13397 Marseille France
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27
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Clark RW, Akhani RK, Wiskur SL. Polymers and Kinetic Resolutions: The Insolubility of It All. ChemCatChem 2016. [DOI: 10.1002/cctc.201500887] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Robert W. Clark
- Department of Chemistry and Biochemistry; University of South Carolina; 631 Sumter St. Columbia SC 29208 USA
| | - Ravish K. Akhani
- Department of Chemistry and Biochemistry; University of South Carolina; 631 Sumter St. Columbia SC 29208 USA
| | - Sheryl L. Wiskur
- Department of Chemistry and Biochemistry; University of South Carolina; 631 Sumter St. Columbia SC 29208 USA
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28
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Li BS, Wang Y, Jin Z, Chi YR. Cycloaddition of cyclobutenone and azomethine imine enabled by chiral isothiourea organic catalysts. Chem Sci 2015; 6:6008-6012. [PMID: 29449914 PMCID: PMC5669243 DOI: 10.1039/c5sc01972a] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 07/18/2015] [Indexed: 11/21/2022] Open
Abstract
The addition of an organic catalyst to the ketone moiety of a γ-mono-chloride substituted cyclobutenone destroys its stable, conjugated and nearly planar structure. The C-C bond in the resulting less stable anionic oxy-substituted non-planar intermediate is then activated. The breaking of one C-C single bond leads to a catalyst-bound intermediate that undergoes α-carbon selective reactions with azomethine imines to afford nitrogen-containing heterocyclic compounds with excellent diastereo- and enantio-selectivities. Our organocatalytic approach provides a new reaction pattern for C-C bond activation of cyclobutenones that is unavailable with transition metal catalysis. In addition, the present study with isothioureas as the organocatalysts expands the potential in using organocatalysts for C-C bond breaking and selective reactions.
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Affiliation(s)
- Bao-Sheng Li
- Division of Chemistry & Biological Chemistry , School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore , 637371 , Singapore .
| | - Yuhuang Wang
- Division of Chemistry & Biological Chemistry , School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore , 637371 , Singapore .
| | - Zhichao Jin
- Division of Chemistry & Biological Chemistry , School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore , 637371 , Singapore .
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry , School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore , 637371 , Singapore .
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering , Ministry of Education , Guizhou University , Guiyang , 550025 , China
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29
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Xu LW, Chen Y, Lu Y. Catalytic Silylations of Alcohols: Turning Simple Protecting-Group Strategies into Powerful Enantioselective Synthetic Methods. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201504127] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Xu LW, Chen Y, Lu Y. Katalytische Silylierung von Alkoholen: von einfachen Schutzgruppenstrategien zu leistungsfähigen enantioselektiven Synthesemethoden. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Wang L, Akhani RK, Wiskur SL. Diastereoselective and Enantioselective Silylation of 2-Arylcyclohexanols. Org Lett 2015; 17:2408-11. [DOI: 10.1021/acs.orglett.5b00919] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li Wang
- The University of South Carolina, 631 Sumter
Street, Columbia, South Carolina 29208, United States
| | - Ravish K. Akhani
- The University of South Carolina, 631 Sumter
Street, Columbia, South Carolina 29208, United States
| | - Sheryl L. Wiskur
- The University of South Carolina, 631 Sumter
Street, Columbia, South Carolina 29208, United States
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32
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Akhani RK, Clark RW, Yuan L, Wang L, Tang C, Wiskur SL. Polystyrene-Supported Triphenylsilyl Chloride for the Silylation-Based Kinetic Resolution of Secondary Alcohols. ChemCatChem 2015. [DOI: 10.1002/cctc.201500173] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Akhani RK, Moore MI, Pribyl JG, Wiskur SL. Linear Free-Energy Relationship and Rate Study on a Silylation-Based Kinetic Resolution: Mechanistic Insights. J Org Chem 2014; 79:2384-96. [DOI: 10.1021/jo402569h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Ravish K. Akhani
- University of South Carolina, Columbia, South Carolina 29208, United States
| | - Maggie I. Moore
- University of South Carolina, Columbia, South Carolina 29208, United States
| | - Julia G. Pribyl
- University of South Carolina, Columbia, South Carolina 29208, United States
| | - Sheryl L. Wiskur
- University of South Carolina, Columbia, South Carolina 29208, United States
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