1
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Yoshida Y, Sawamura M, Shimizu Y. Boron-Catalyzed Michael Reaction of Donor-Acceptor Carboxylic Acid Pairs Enabling Direct Synthesis of 1,5-Dicarboxylic Acids. Org Lett 2024. [PMID: 38898380 DOI: 10.1021/acs.orglett.4c01542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
A boron-catalyzed Michael reaction using pairs of carboxylic acids was developed. The reaction occurs through dual activation of the two substrates by a boron catalyst, which facilitates boron enolate formation from the donor carboxylic acid with simultaneous activation of the α,β-unsaturated carboxylic acid as the acceptor. α-Aryl and α-alkenyl carboxylic acids were applicable as donors. The versatility and utility of this reaction were demonstrated by the direct use of pharmaceuticals as donor carboxylic acids.
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Affiliation(s)
- Yukiho Yoshida
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaya Sawamura
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yohei Shimizu
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
- List Sustainable Digital Transformation Catalyst Collaboration Research Platform, Institute for Chemical Reaction Design and Discovery (ICReDD List-PF), Hokkaido University, Kita 21 Nishi 10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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2
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Yuan D, Goodfellow AS, Kasten K, Duan Z, Kang T, Cordes DB, McKay AP, Bühl M, Boyce GR, Smith AD. Understanding divergent substrate stereoselectivity in the isothiourea-catalysed conjugate addition of cyclic α-substituted β-ketoesters to α,β-unsaturated aryl esters. Chem Sci 2023; 14:14146-14156. [PMID: 38098722 PMCID: PMC10717594 DOI: 10.1039/d3sc05470e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 11/20/2023] [Indexed: 12/17/2023] Open
Abstract
The development of enantioselective synthetic methods capable of generating vicinal stereogenic centres, where one is tetrasubstituted (such as either an all-carbon quaternary centre or where one or more substituents are heteroatoms), is a recognised synthetic challenge. Herein, the enantioselective conjugate addition of a range of carbo- and heterocyclic α-substituted β-ketoesters to α,β-unsaturated aryl esters using the isothiourea HyperBTM as a Lewis base catalyst is demonstrated. Notably, divergent diastereoselectivity is observed through the use of either cyclopentanone-derived or indanone-derived substituted β-ketoesters with both generating the desired stereodefined products with high selectivity (>95 : 5 dr, up to 99 : 1 er). The scope and limitations of these processes are demonstrated, alongside application on gram scale. The origin of the divergent substrate selectivity has been probed through the use of DFT-analysis, with preferential orientation driven by dual stabilising CH⋯O interactions. The importance of solvation with strongly polar transition-states is highlighted and the SMD solvation model is demonstrated to capture solvation effects reliably.
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Affiliation(s)
- Ding Yuan
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
- School of Biological and Chemical Engineering, Panzhihua University Panzhihua 617000 China
| | - Alister S Goodfellow
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Kevin Kasten
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Zhuan Duan
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Tengfei Kang
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Aidan P McKay
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Michael Bühl
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Gregory R Boyce
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
- Department of Chemistry and Physics, Florida Gulf Coast University Fort Myers Florida 33965 USA
- Department of Chemistry and Biochemistry, East Stroudsburg University East Stroudsburg Pennsylvania 18301 USA
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
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3
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Hou YJ, Zhao L, Chai GL, Zhong K, Chang J. Highly Enantioselective Chiral Diol-Catalyzed Conjugate Addition of Boronic Acids to α,β-Unsaturated Trifluoromethyl Ketones. J Org Chem 2023. [PMID: 38006355 DOI: 10.1021/acs.joc.3c02281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2023]
Abstract
The (R)-3,3'-(3,5-(CF3)2-C6H3)2-BINOL-catalyzed enantioselective conjugate addition of organic boronic acids to α,β-unsaturated 1,1,1-trifluoromethyl ketones affords corresponding addition products bearing a stereogenic center at the β-position in moderate to high yields and excellent enantioselectivities (up to 99% ee), without any 1,2-addition product formation. Moreover, this catalytic protocol features mild reaction conditions, a broad substrate scope, suitability for alkenylboronic acids and (hetero)arylboronic acids, and easy scale-up.
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Affiliation(s)
- Ya-Jing Hou
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Lu Zhao
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guo-Li Chai
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Kangbao Zhong
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Junbiao Chang
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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4
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Wang Y, Young CM, Cordes DB, Slawin AMZ, Smith AD. Probing Regio- and Enantioselectivity in the Formal [2 + 2] Cycloaddition of C(1)-Alkyl Ammonium Enolates with β- and α,β-Substituted Trifluoromethylenones. J Org Chem 2023. [PMID: 37184337 DOI: 10.1021/acs.joc.2c02688] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The isothiourea-catalyzed regio- and enantioselective formal [2 + 2] cycloaddition of C(1)-alkyl and C(1)-unsubstituted ammonium enolates with β- and α,β-substituted trifluoromethylenones has been developed. In all cases, preferential [2 + 2]-cycloaddition over the alternative [4 + 2]-cycloaddition is observed, giving β-lactones with excellent diastereo- and enantioselectivity (34 examples, up to >95:5 dr, >99:1 er). The regioselectivity of the process was dictated by the nature of the substituents on both reaction components. Solely [2 + 2] cycloaddition products are observed when using α,β-substituted trifluoromethylenones or α-trialkylsilyl acetic acid derivatives; both [2 + 2] and [4 + 2] cycloaddition products are observed when using β-substituted trifluoromethylenones and α-alkyl-α-trialkylsilyl acetic acids as reactants, with the [2 + 2] cycloaddition as the major reaction product. The beneficial role of the α-silyl substituent within the acid component in this protocol has been demonstrated by control experiments.
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Affiliation(s)
- Yihong Wang
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Claire M Young
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
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5
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Wang H, Zhou Y, Xie Y, Liu Y, Li Y, Zhang H, Long J. Synthesis of functionalized 3-aryl-3 H-benzofuranone derivatives from aryl acetate via [3 + 2] annulation of 1,4-dihydroxy-2-naphthoic acid ester. Org Biomol Chem 2023; 21:1821-1826. [PMID: 36751732 DOI: 10.1039/d2ob02319a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A novel [3 + 2] cascade reaction of aryl acetate with 1,4-dihydroxy-2-naphthoic acid ester by cooperative catalysis of isothiourea and vanadium is developed. The key step of the reaction is that the C1-ammonium enolates generated from aryl acetate will cycloadduct to 1,4-naphthoquinone intermediates. 3-Aryl-3H-benzofuranone derivatives can be prepared in medium to good yields under mild conditions.
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Affiliation(s)
- Huan Wang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China.
| | - Yuxiang Zhou
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China.
| | - Ying Xie
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China.
| | - Yi Liu
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China.
| | - Yulong Li
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China.
| | - Hao Zhang
- College of Vanadium and Titanium, Panzhihua University, 10 Airport Lu, Panzhihua, Sichuan, 617000, China
| | - Jilang Long
- College of Chemistry and Chemical Engineering, China West Normal University, 1 Shida Lu, Nanchong, Sichuan, 637002, China
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6
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Wang X, Ji Z, Liu J, Wang B, Jin H, Zhang L. Advances in Organocatalytic Asymmetric Reactions Involving Thioesters. ACTA CHIMICA SINICA 2023. [DOI: 10.6023/a22100422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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7
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Wang Y, Young CM, Liu H, Hartley WC, Wienhold M, Cordes DB, Slawin AMZ, Smith AD. A Desilylative Approach to Alkyl Substituted C(1)‐Ammonium Enolates: Application in Enantioselective [2+2] Cycloadditions. Angew Chem Int Ed Engl 2022; 61:e202208800. [PMID: 35833471 PMCID: PMC9543305 DOI: 10.1002/anie.202208800] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Indexed: 11/22/2022]
Abstract
The catalytic generation of C(1)‐ammonium enolates from the corresponding α‐silyl‐α‐alkyl substituted carboxylic acids using the isothiourea HyperBTM is reported. This desilylative approach grants access to α‐unsubstituted and α‐alkyl substituted C(1)‐ammonium enolates, which are typically difficult to access through traditional methods reliant upon deprotonation. The scope and limitations of this process is established in enantioselective [2+2]‐cycloaddition processes with perfluoroalkylketones (31 examples, up to 96 % yield and >99 : 1 er), as well as selective [2+2]‐cycloaddition with trifluoromethyl enones (4 examples, up to 75 % yield and >99 : 1 er). Preliminary mechanistic studies indicate this process proceeds through an initial kinetic resolution of an in situ prepared (±)‐α‐silyl‐α‐alkyl substituted anhydride, while the reaction process exhibits overall pseudo zero‐order kinetics.
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Affiliation(s)
- Yihong Wang
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Claire M. Young
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Honglei Liu
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Will C. Hartley
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - Max Wienhold
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | - David. B. Cordes
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
| | | | - Andrew D. Smith
- EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
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8
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Nakashima K, Hanamura S, Imamura A, Matsushima Y, Hirashima SI, Miura T. Asymmetric Friedel–Crafts alkylation of indoles with α,β‐unsaturated trifluoromethyl ketones using a squaramide organocatalyst. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kosuke Nakashima
- Tokyo University of Pharmacy and Life Sciences: Tokyo Yakka Daigaku Medicinal Chemistry 1432-1 Horinouchi 192-0392 Hachioji JAPAN
| | - Sumire Hanamura
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Aoi Imamura
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Yasuyuki Matsushima
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Shin-ichi Hirashima
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Tsuyoshi Miura
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
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9
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Abdelhamid Y, Kasten K, Dunne J, Hartley WC, Young CM, Cordes DB, Slawin AMZ, Ng S, Smith AD. Isothiourea-Catalyzed [2 + 2] Cycloaddition of C(1)-Ammonium Enolates and N-Alkyl Isatins. Org Lett 2022; 24:5444-5449. [PMID: 35848722 PMCID: PMC9490795 DOI: 10.1021/acs.orglett.2c02170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Enantioselective [2 + 2] cycloaddition of C(1)-ammonium
enolates
generated catalytically using the isothiourea HyperBTM with N-alkyl isatins gives spirocyclic β-lactones. In situ ring opening with an amine nucleophile generates
isolable highly enantioenriched products in up to 92:8 dr and in >99:1
er.
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Affiliation(s)
- Yusra Abdelhamid
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Kevin Kasten
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Joanne Dunne
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Will C Hartley
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Claire M Young
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, U.K., KY16 9ST
| | - Sean Ng
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
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10
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Smith AD, Wang Y, Young CM, Liu H, Hartley WC, Wienhold M, Cordes DB, Slawin AMZ. A Desilylative Approach to Alkyl Substituted C(1)‐Ammonium Enolates: Application in Enantioselective [2+2] Cycloadditions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew David Smith
- University of St Andrews School of Chemistry North Haugh FIFE, KY10 3TH St. Andrews UNITED KINGDOM
| | - Yihong Wang
- University of St Andrews School of Chemistry UNITED KINGDOM
| | | | - Honglei Liu
- University of St Andrews School of Chemistry UNITED KINGDOM
| | | | - Max Wienhold
- University of St Andrews School of Chemistry UNITED KINGDOM
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11
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Wang J, Chen Y, Yao C, Zhang K. Catalyst‐free Synthesis of Benzothiazolopyrimidines
via
Visible‐Light‐Induced Wolff Rearrangement/[4+2] Cycloaddition Process. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiao‐Mei Wang
- School of Materials and Chemical Engineering Xuzhou University of Technology Xuzhou 221018 P. R China
| | - Yang‐Xu Chen
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science Jiangsu Normal University Xuzhou Jiangsu 221116 P. R. China
| | - Chang‐Sheng Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science Jiangsu Normal University Xuzhou Jiangsu 221116 P. R. China
| | - Kai Zhang
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science Jiangsu Normal University Xuzhou Jiangsu 221116 P. R. China
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12
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Kurihara T, Kojima M, Yoshino T, Matsunaga S. Achiral Cp*Rh(III)/Chiral Lewis Base Cooperative Catalysis for Enantioselective Cyclization via C–H Activation. J Am Chem Soc 2022; 144:7058-7065. [DOI: 10.1021/jacs.2c01223] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Takumaru Kurihara
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Masahiro Kojima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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13
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Ji DS, Liang H, Yang KX, Feng ZT, Luo YC, Xu GQ, Gu Y, Xu PF. Solvent directed chemically divergent synthesis of β-lactams and α-amino acid derivatives with chiral isothiourea. Chem Sci 2022; 13:1801-1807. [PMID: 35282623 PMCID: PMC8826511 DOI: 10.1039/d1sc06127e] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/18/2022] [Indexed: 01/01/2023] Open
Abstract
A protocol for the chemically divergent synthesis of β-lactams and α-amino acid derivatives with isothiourea (ITU) catalysis by switching solvents was developed. The stereospecific Mannich reaction occurring between imine and C(1)-ammonium enolate generated zwitterionic intermediates, which underwent intramolecular lactamization and afforded β-lactam derivatives when DCM and CH3CN were used as solvents. However, when EtOH was used as the solvent, the intermediates underwent an intermolecular esterification reaction, and α-amino acid derivatives were produced. Detailed mechanistic experiments were conducted to prove that these two kinds of products came from the same intermediates. Furthermore, chemically diversified transformations of β-lactam and α-amino acid derivatives were achieved. A protocol for the solvent directed chemically divergent synthesis of β-lactam and α-amino acid derivatives with chiral isothiourea was reported.![]()
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Affiliation(s)
- Dong-Sheng Ji
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Hui Liang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Kai-Xuan Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Zhi-Tao Feng
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California, 95616, USA
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yucheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
- State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China
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14
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Yuan S, Zheng WH. Enantioselective Construction of Tertiary α-Alkyl Fluoride via BTM-Catalyzed Fluorination of α-Alkynyl-Substituted Acetic Acids. J Org Chem 2021; 87:713-720. [PMID: 34927437 DOI: 10.1021/acs.joc.1c02710] [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
The isothiourea-catalyzed enantioselective construction of tertiary α-fluoro stereogenic centers has been demonstrated by using branched alkynyl-substituted acetic acids as starting materials, providing a broad range of optically active tertiary α-alkyl fluorides in high enantioselectivity (up to 97% ee). Furthermore, this methodology was proven to be scaled up to a Gram scale without loss of enantioselectivity.
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Affiliation(s)
- Shiru Yuan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Wen-Hua Zheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, China
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15
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Arokianathar JN, Hartley WC, McLaughlin C, Greenhalgh MD, Stead D, Ng S, Slawin AMZ, Smith AD. Isothiourea-Catalyzed Enantioselective α-Alkylation of Esters via 1,6-Conjugate Addition to para-Quinone Methides. Molecules 2021; 26:6333. [PMID: 34770741 PMCID: PMC8588318 DOI: 10.3390/molecules26216333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 01/21/2023] Open
Abstract
The isothiourea-catalyzed enantioselective 1,6-conjugate addition of para-nitrophenyl esters to 2,6-disubstituted para-quinone methides is reported. para-Nitrophenoxide, generated in situ from initial N-acylation of the isothiourea by the para-nitrophenyl ester, is proposed to facilitate catalyst turnover in this transformation. A range of para-nitrophenyl ester products can be isolated, or derivatized in situ by addition of benzylamine to give amides at up to 99% yield. Although low diastereocontrol is observed, the diastereoisomeric ester products are separable and formed with high enantiocontrol (up to 94:6 er).
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Affiliation(s)
- Jude N. Arokianathar
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (J.N.A.); (W.C.H.); (C.M.); (M.D.G.); (A.M.Z.S.)
| | - Will C. Hartley
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (J.N.A.); (W.C.H.); (C.M.); (M.D.G.); (A.M.Z.S.)
| | - Calum McLaughlin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (J.N.A.); (W.C.H.); (C.M.); (M.D.G.); (A.M.Z.S.)
| | - Mark D. Greenhalgh
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (J.N.A.); (W.C.H.); (C.M.); (M.D.G.); (A.M.Z.S.)
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
| | - Darren Stead
- AstraZeneca, Oncology R&D, Research & Early Development, Darwin Building, 310, Cambridge Science Park, Milton Road, Cambridge CB4 0WG, UK;
| | - Sean Ng
- Syngenta, Jealott’s Hill International Research Centre, Bracknell RG42 6EY, UK;
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (J.N.A.); (W.C.H.); (C.M.); (M.D.G.); (A.M.Z.S.)
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK; (J.N.A.); (W.C.H.); (C.M.); (M.D.G.); (A.M.Z.S.)
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16
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McLaughlin C, Bitai J, Barber LJ, Slawin AMZ, Smith AD. Catalytic enantioselective synthesis of 1,4-dihydropyridines via the addition of C(1)-ammonium enolates to pyridinium salts. Chem Sci 2021; 12:12001-12011. [PMID: 34667566 PMCID: PMC8457386 DOI: 10.1039/d1sc03860e] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/05/2021] [Indexed: 12/30/2022] Open
Abstract
The regio- and stereoselective addition of C(1)-ammonium enolates - generated in situ from aryl esters and the isothiourea catalyst (R)-BTM - to pyridinium salts bearing an electron withdrawing substituent in the 3-position allows the synthesis of a range of enantioenriched 1,4-dihydropyridines. This represents the first organocatalytic approach to pyridine dearomatisation using pronucleophiles at the carboxylic acid oxidation level. Optimisation studies revealed a significant solvent dependency upon product enantioselectivity, with only toluene providing significant asymmetric induction. Using DABCO as a base also proved beneficial for product enantioselectivity, while investigations into the nature of the counterion showed that co-ordinating bromide or chloride substrates led to higher product er than the corresponding tetrafluoroborate or hexafluorophosphate. The scope and limitations of this process are developed, with enantioselective addition to 3-cyano- or 3-sulfonylpyridinium salts giving the corresponding 1,4-dihydropyridines (15 examples, up to 95 : 5 dr and 98 : 2 er).
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Affiliation(s)
- Calum McLaughlin
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Jacqueline Bitai
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Lydia J Barber
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews St Andrews Fife KY16 9ST UK
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17
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Yuan S, Liao C, Zheng WH. [2.2]Paracyclophane-Based Isothiourea-Catalyzed Highly Enantioselective α-Fluorination of Carboxylic Acids. Org Lett 2021; 23:4142-4146. [PMID: 33988375 DOI: 10.1021/acs.orglett.1c01046] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Planar chiral [2.2]paracyclophane-based isothiourea catalysts have been prepared over a few simple steps in high yields. In the presence of these catalysts, highly efficient catalytic enantioselective fluorination of carboxylic acids has been accomplished, providing a broad range of optically active α-fluoroesters in high yield and excellent enantioselectivity.
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Affiliation(s)
- Shiru Yuan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, Jiangsu, China
| | - Chen Liao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, Jiangsu, China
| | - Wen-Hua Zheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, Jiangsu, China
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18
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Li Y, Li Z, Zhang Z. Mechanism and regio- and stereoselectivity in an NHC-catalyzed Mannich/lactamization domino reaction. Phys Chem Chem Phys 2021; 23:6204-6212. [PMID: 33687420 DOI: 10.1039/d1cp00369k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Density functional theory (DFT) calculations (M06-2X) have been employed to disclose the mechanisms and regio- and stereo-selectivities of the N-heterocyclic carbene (NHC)-catalyzed reaction of 2-benzothiazolimines and α-chloroaldehydes. The preferred mechanism is initiated by the nucleophilic attack of NHC on α-chloroaldehyde (first step), followed by 1,2-proton transfer which was assisted by the Brønsted acid DABCO·H+ to generate the Breslow intermediate (second step). The cleavage of the C-Cl bond (third step) and deprotonation (fourth step) form the enolate intermediate. This further reacts with 2-benzothiazolimine which leads to the formation of a new C-C bond (fifth step). Subsequent cyclization takes place via the formation of a new C-N bond (sixth step). Catalyst regeneration completes the whole catalytic cycle and affords the final product (seventh step). The DFT results indicate that the fifth step determines the stereochemistry of the reaction and leads to benzothiazolopyrimidinone with the SS configuration, which agrees well with experimental observations. Intramolecular cyclization is found to be the regioselectivity-determining step, for which the [4+2] annulation pathway is more preferred than that via [2+2] annulation, which again agrees well with experimental observations. Based on the mechanism proposed, the origins of regio- and stereoselectivities have also been investigated by performing distortion/interaction, natural bond orbital (NBO) and non-covalent interaction (NCI) analyses. The mechanistic insights gained in this work should be helpful in the rational design of potential catalysts for analogous reactions.
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Affiliation(s)
- Yan Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| | - Zhilin Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
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19
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Vetter AC, Gilheany DG, Nikitin K. Wittig Olefination Using Phosphonium Ion-Pair Reagents Incorporating an Endogenous Base. Org Lett 2021; 23:1457-1462. [PMID: 33529039 DOI: 10.1021/acs.orglett.1c00133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Despite common perception, the use of strong bases in Wittig chemistry is utterly unnecessary: we report a series of novel ion-pair phosphonium carboxylate reagents which are essentially "storable ylides". These reagents are straightforwardly prepared in excellent yields, and their fluxional nature permits clean olefination of a broad range of aldehydes and even hemiacetals.
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Affiliation(s)
- Anna C Vetter
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Declan G Gilheany
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Kirill Nikitin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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20
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McLaughlin C, Smith AD. Generation and Reactivity of C(1)-Ammonium Enolates by Using Isothiourea Catalysis. Chemistry 2021; 27:1533-1555. [PMID: 32557875 PMCID: PMC7894297 DOI: 10.1002/chem.202002059] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Indexed: 12/17/2022]
Abstract
C(1)-Ammonium enolates are powerful, catalytically generated synthetic intermediates applied in the enantioselective α-functionalisation of carboxylic acid derivatives. This minireview describes the recent developments in the generation and application of C(1)-ammonium enolates from various precursors (carboxylic acids, anhydrides, acyl imidazoles, aryl esters, α-diazoketones, alkyl halides) using isothiourea Lewis base organocatalysts. Their synthetic utility in intra- and intermolecular enantioselective C-C and C-X bond forming processes on reaction with various electrophiles will be showcased utilising two distinct catalyst turnover approaches.
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Affiliation(s)
- Calum McLaughlin
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughFifeKY16 9STScotland
| | - Andrew D. Smith
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughFifeKY16 9STScotland
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21
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Chen XP, Hou KQ, Zhou F, Chan ASC, Xiong XF. Organocatalytic Asymmetric Synthesis of Benzothiazolopyrimidines via [4 + 2] Cyclization of 2-Benzothiazolimines and Aldehydes. J Org Chem 2021; 86:1667-1675. [DOI: 10.1021/acs.joc.0c02499] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xue-Ping Chen
- Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Ke-Qiang Hou
- Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Feng Zhou
- Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Albert S. C. Chan
- Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Xiao-Feng Xiong
- Guangdong Provincial Key Laboratory of Chiral Molecules and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
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22
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Di H, Liu Y, Ma Y, Yang X, Jin H, Zhang L. Recent Advances in Organocatalytic Asymmetric Synthesis of 3,4-Dihydropyran-2-ones and 3,4-Dihydropyridin-2-ones. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Yuan YC, Abd El Sater M, Mellah M, Jaber N, David ORP, Schulz E. Enantiopure isothiourea@carbon-based support: stacking interactions for recycling a lewis base in asymmetric catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo00646k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An enantiopure isothiourea (hyperBTM) was functionalized by a pyrene moiety via click chemistry; immobilized on reduced Graphene Oxide, this recyclable chiral organocatalyst promotes formal [3+2] cycloaddition of ammonium enolates with oxaziridines.
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Affiliation(s)
- Yu-Chao Yuan
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
- Institut Lavoisier, UMR 8180, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris Saclay, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Mariam Abd El Sater
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
- Laboratoire de Chimie Médicinale et des Produits Naturels, Université Libanaise, Faculté des Sciences (I) and PRASE-EDST, Hadath, Beyrouth, Lebanon
| | - Mohamed Mellah
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
| | - Nada Jaber
- Laboratoire de Chimie Médicinale et des Produits Naturels, Université Libanaise, Faculté des Sciences (I) and PRASE-EDST, Hadath, Beyrouth, Lebanon
| | - Olivier R. P. David
- Institut Lavoisier, UMR 8180, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris Saclay, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Emmanuelle Schulz
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
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24
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Origin of diastereoselectivity and catalytic efficiency on Isothiourea-mediated cyclization of carboxylic acid with alkenyl ketone. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.113004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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25
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Zhang S, Bacheley L, Young CM, Stark DG, O'Riordan T, Slawin AMZ, Smith AD. Isothiourea‐Catalyzed Functionalization of Pyrrolyl‐ and Indolylacetic Acid: Enantioselective Synthesis of Dihydropyridinones and One‐pot Synthesis of Pyridinones. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shuyue Zhang
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Lucas Bacheley
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Claire M. Young
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Daniel G. Stark
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Timothy O'Riordan
- Syngenta Jealott's Hill International Research Centre Bracknell Berkshire RG42 6EY UK
| | - Alexandra M. Z. Slawin
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
| | - Andrew D. Smith
- EastCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland Scotland KY16 9ST UK
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26
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Biswas A, Mondal H, Maji MS. Synthesis of Heterocycles by isothiourea organocatalysis. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4119] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anup Biswas
- Department of Chemistry Hooghly Women's College Hooghly India
| | - Haripriyo Mondal
- Department of Chemistry Indian Institute of Technology Kharagpur India
| | - Modhu S. Maji
- Department of Chemistry Indian Institute of Technology Kharagpur India
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27
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Zhang S, Hartley WC, Greenhalgh MD, Ng S, Slawin AMZ, Smith AD. Isothiourea‐Catalyzed Synthesis of Pyrrole‐ and Indole‐Functionalized Tetrasubstituted Pyridines. ChemCatChem 2020. [DOI: 10.1002/cctc.202000882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Will C. Hartley
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Mark D. Greenhalgh
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Sean Ng
- Syngenta Jealott's Hill International Research Centre Bracknell Berkshire, RG42 6EY UK
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry University of St Andrews North Haugh St Andrews Fife, KY16 9ST UK
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28
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Affiliation(s)
- Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - Jonas J. Koenig
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
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29
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Zhang S, Greenhalgh MD, Slawin AMZ, Smith AD. Tandem sequential catalytic enantioselective synthesis of highly-functionalised tetrahydroindolizine derivatives. Chem Sci 2020; 11:3885-3892. [PMID: 34122857 PMCID: PMC8152628 DOI: 10.1039/d0sc00432d] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
An isothiourea-catalysed enantioselective synthesis of novel tetrahydroindolizine derivatives is reported through a one-pot tandem sequential process. The application of 2-(pyrrol-1-yl)acetic acid in combination with either a trifluoromethyl enone or an α-keto-β,γ-unsaturated ester in an enantioselective Michael addition–lactonisation process, followed by in situ ring-opening and cyclisation, led to a range of 24 tetrahydroindolizine derivatives containing three stereocentres in up to >95 : 5 dr and >99 : 1 er. The isothiourea-catalysed enantioselective synthesis of tetrahydroindolizine derivatives containing three stereocentres is reported through a one-pot tandem sequential process.![]()
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Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Mark D Greenhalgh
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews North Haugh St Andrews KY16 9ST UK
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30
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Young CM, Elmi A, Pascoe DJ, Morris RK, McLaughlin C, Woods AM, Frost AB, Houpliere A, Ling KB, Smith TK, Slawin AMZ, Willoughby PH, Cockroft SL, Smith AD. The Importance of 1,5‐Oxygen⋅⋅⋅Chalcogen Interactions in Enantioselective Isochalcogenourea Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914421] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Claire M. Young
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Alex Elmi
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Dominic J. Pascoe
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Rylie K. Morris
- Chemistry DepartmentRipon College 300 W. Seward St. Ripon WI 54971 USA
| | - Calum McLaughlin
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Andrew M. Woods
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Aileen B. Frost
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Alix Houpliere
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Kenneth B. Ling
- SyngentaJealott's Hill International Research Centre Bracknell Berkshire RG42 6EY UK
| | - Terry K. Smith
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | | | | | - Scott L. Cockroft
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Andrew D. Smith
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
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31
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Young CM, Elmi A, Pascoe DJ, Morris RK, McLaughlin C, Woods AM, Frost AB, Houpliere A, Ling KB, Smith TK, Slawin AMZ, Willoughby PH, Cockroft SL, Smith AD. The Importance of 1,5‐Oxygen⋅⋅⋅Chalcogen Interactions in Enantioselective Isochalcogenourea Catalysis. Angew Chem Int Ed Engl 2020; 59:3705-3710. [DOI: 10.1002/anie.201914421] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/12/2019] [Indexed: 01/17/2023]
Affiliation(s)
- Claire M. Young
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Alex Elmi
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Dominic J. Pascoe
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Rylie K. Morris
- Chemistry DepartmentRipon College 300 W. Seward St. Ripon WI 54971 USA
| | - Calum McLaughlin
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Andrew M. Woods
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Aileen B. Frost
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Alix Houpliere
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | - Kenneth B. Ling
- SyngentaJealott's Hill International Research Centre Bracknell Berkshire RG42 6EY UK
| | - Terry K. Smith
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
| | | | | | - Scott L. Cockroft
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Andrew D. Smith
- EaStCHEM School of ChemistryUniversity of St Andrews North Haugh St Andrews KY16 9ST UK
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32
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Shi L, Liu Y, Wang C, Yuan X, Liu X, Wu L, Pan Z, Yu Q, Xu C, Yang G. Synthesis of 1-(β-coumarinyl)-1-(β-indolyl)trifluoroethanols through regioselective Friedel–Crafts alkylation of indoles with β-(trifluoroacetyl)coumarins catalyzed by Sc(OTf)3. RSC Adv 2020; 10:13929-13935. [PMID: 35498470 PMCID: PMC9051918 DOI: 10.1039/d0ra01237h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 03/20/2020] [Indexed: 11/22/2022] Open
Abstract
A highly efficient Friedel–Crafts alkylation of indole derivatives with β-(trifluoroacetyl)coumarins using Sc(OTf)3 as a catalyst has been developed, which gives regioselective 1,2-adducts to afford 1-(β-coumarinyl)-1-(β-indolyl)trifluoroethanols. A series of tertiary trifluoroethanols containing different indole and coumarin groups were synthesized in moderate to excellent yields (up to 95%) in the presence of 5 mol% catalyst in a short time (only 2 minutes at least). A mechanism of the reaction, in which the trace amount of water plays the role of proton transfer in catalyzing circulation was proposed and confirmed. A Friedel–Crafts alkylation of indoles with β-(trifluoroacetyl)coumarins catalyzed by Sc(OTf)3 to afford 1-(β-coumarinyl)-1-(β-indolyl)trifluoroethanols in a short time and high yield was developed.![]()
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Affiliation(s)
- Lijun Shi
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Ying Liu
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Caixia Wang
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Xinxin Yuan
- College of Resource and Environment
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Xiaobiao Liu
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Lulu Wu
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Zhenliang Pan
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Qicheng Yu
- College of Animal Science and Veterinary Medicine
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Cuilian Xu
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
| | - Guoyu Yang
- School of Science
- Henan Agricultural University
- Zhengzhou 450002
- P. R. China
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33
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McLaughlin C, Slawin AMZ, Smith AD. Base‐free Enantioselective C(1)‐Ammonium Enolate Catalysis Exploiting Aryloxides: A Synthetic and Mechanistic Study. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908627] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Calum McLaughlin
- EaStCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland KY16 9ST UK
| | - Alexandra M. Z. Slawin
- EaStCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM School of Chemistry University of St Andrews North Haugh Fife Scotland KY16 9ST UK
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34
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McLaughlin C, Slawin AMZ, Smith AD. Base-free Enantioselective C(1)-Ammonium Enolate Catalysis Exploiting Aryloxides: A Synthetic and Mechanistic Study. Angew Chem Int Ed Engl 2019; 58:15111-15119. [PMID: 31436380 DOI: 10.1002/anie.201908627] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Indexed: 12/21/2022]
Abstract
An isothiourea-catalyzed enantioselective Michael addition of aryl ester pronucleophiles to vinyl bis-sulfones via C(1)-ammonium enolate intermediates has been developed. This operationally simple method allows the base-free functionalization of aryl esters to form α-functionalized products containing two contiguous tertiary stereogenic centres in excellent yield and stereoselectivity (all ≥99:1 er). Key to the success of this methodology is the multifunctional role of the aryloxide, which operates as a leaving group, Brønsted base, Brønsted acid and Lewis base within the catalytic cycle. Comprehensive mechanistic studies, including variable time normalization analysis (VTNA) and isotopologue competition experiments, have been carried out. These studies have identified (i) orders of all reactants; (ii) a turnover-limiting Michael addition step, (iii) product inhibition, (iv) the catalyst resting state and (v) catalyst deactivation through protonation.
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Affiliation(s)
- Calum McLaughlin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, UK
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, UK
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35
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Li L, Ding D, Song J, Han Z, Gong L. Catalytic Generation of C1 Ammonium Enolates from Halides and CO for Asymmetric Cascade Reactions. Angew Chem Int Ed Engl 2019; 58:7647-7651. [DOI: 10.1002/anie.201901501] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/10/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Lu‐Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Du Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Zhi‐Yong Han
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
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36
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Li L, Ding D, Song J, Han Z, Gong L. Catalytic Generation of C1 Ammonium Enolates from Halides and CO for Asymmetric Cascade Reactions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901501] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lu‐Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Du Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Zhi‐Yong Han
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
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37
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Jarrige L, Glavač D, Levitre G, Retailleau P, Bernadat G, Neuville L, Masson G. Chiral phosphoric acid-catalyzed enantioselective construction of structurally diverse benzothiazolopyrimidines. Chem Sci 2019; 10:3765-3769. [PMID: 31015920 PMCID: PMC6461124 DOI: 10.1039/c8sc05581e] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 02/06/2019] [Indexed: 11/24/2022] Open
Abstract
A highly efficient catalytic enantioselective [4+2] cycloaddition was developed between 2-benzothiazolimines and enecarbamates. A wide range of benzothiazolopyrimidines bearing three contiguous stereogenic centers was obtained in high to excellent yields and with excellent diastereo- and enantioselectivities (d.r. > 98 : 2 and up to >99% ee). Furthermore, this chiral phosphoric acid-catalyzed strategy was scalable and enabled access to a new class of optically pure Lewis base isothiourea derivatives.
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Affiliation(s)
- Lucie Jarrige
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Danijel Glavač
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
- Ruđer Bošković Institute , Division of Organic Chemistry and Biochemistry , Bijenička cesta 54 , 10000 Zagreb , Croatia
| | - Guillaume Levitre
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Guillaume Bernadat
- Laboratoire Chimie Thérapeutique , Faculté de Pharmacie Biocis 8076 , LabEx LERMIT , 5, rue J. B. Clément, 92296 Châtenay Malabry , France
| | - Luc Neuville
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301 , Université Paris-Sud , Université Paris-Saclay , 1, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex , France .
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38
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Young CM, Taylor JE, Smith AD. Evaluating aryl esters as bench-stable C(1)-ammonium enolate precursors in catalytic, enantioselective Michael addition–lactonisations. Org Biomol Chem 2019; 17:4747-4752. [DOI: 10.1039/c9ob00703b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An evaluation of a range of aryl, alkyl and vinyl esters as prospective C(1)-ammonium enolate precursors in enantioselective Michael addition–lactonisation processes with (E)-trifluoromethylenones using isothiourea catalysis is reported.
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Affiliation(s)
- Claire M. Young
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - James E. Taylor
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
| | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- North Haugh
- UK
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39
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Crotti S, Belletti G, Di Iorio N, Marotta E, Mazzanti A, Righi P, Bencivenni G. Asymmetric vinylogous aldol addition of alkylidene oxindoles on trifluoromethyl-α,β-unsaturated ketones. RSC Adv 2018; 8:33451-33458. [PMID: 35548158 PMCID: PMC9086480 DOI: 10.1039/c8ra06615a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 09/18/2018] [Indexed: 12/21/2022] Open
Abstract
A novel vinylogous aldol addition of alkylidene oxindole with 1-trifluoromethyl-3-alkylidene-propan-2-ones is presented. The reaction, catalyzed by a bifunctional tertiary amine, provides an efficient application of the vinylogous reactivity of oxindoles for the preparation of enantioenriched trifluoromethylated allylic alcohols.
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Affiliation(s)
- Simone Crotti
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
| | - Giada Belletti
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
| | - Nicola Di Iorio
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
| | - Emanuela Marotta
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
| | - Andrea Mazzanti
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
| | - Paolo Righi
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
| | - Giorgio Bencivenni
- Department of Industrial Chemistry "Toso Montanari", Alma Mater Studiorum-University of Bologna Viale del Risorgimento 4 40136-Bologna Italy
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40
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Rodríguez‐Escrich C, Pericàs MA. Catalytic Enantioselective Flow Processes with Solid‐Supported Chiral Catalysts. CHEM REC 2018; 19:1872-1890. [DOI: 10.1002/tcr.201800097] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/02/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Carles Rodríguez‐Escrich
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology (BIST) Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology (BIST) Avinguda Països Catalans 16 43007 Tarragona Spain
- Departament de Química OrgànicaUniversitat de Barcelona 08080 Barcelona Spain
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41
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Zhang S, Taylor JE, Slawin AMZ, Smith AD. Isothiourea-Catalyzed Enantioselective Functionalization of 2-Pyrrolyl Acetic Acid: Two-Step Synthesis of Stereodefined Dihydroindolizinones. Org Lett 2018; 20:5482-5485. [DOI: 10.1021/acs.orglett.8b02423] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuyue Zhang
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| | - James E. Taylor
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, KY16 9ST, U.K
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42
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Parkin JD, Chisholm R, Frost AB, Bailey RG, Smith AD, Hähner G. Direct Organocatalytic Enantioselective Functionalization of SiO
x
Surfaces. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- John D. Parkin
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews KY16 9ST UK
| | - Ross Chisholm
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews KY16 9ST UK
| | - Aileen B. Frost
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews KY16 9ST UK
| | - Richard G. Bailey
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews KY16 9ST UK
| | - Andrew D. Smith
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews KY16 9ST UK
| | - Georg Hähner
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews KY16 9ST UK
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43
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Parkin JD, Chisholm R, Frost AB, Bailey RG, Smith AD, Hähner G. Direct Organocatalytic Enantioselective Functionalization of SiO x Surfaces. Angew Chem Int Ed Engl 2018; 57:9377-9381. [PMID: 29870577 DOI: 10.1002/anie.201804814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/29/2018] [Indexed: 01/17/2023]
Abstract
Traditional methods to prepare chiral surfaces involve either the adsorption of a chiral molecule onto an achiral surface, or adsorption of a species that forms a chiral template creating lattices with long range order. To date only limited alternative strategies to prepare chiral surfaces have been studied. In this manuscript a "bottom-up" approach is developed that allows the preparation of chiral surfaces by direct enantioselective organocatalytic reactions on a functionalized silicon oxide supported self-assembled monolayer (SAM). The efficient catalytic generation of enantiomerically enriched organic surfaces is achieved using a commercially available homogeneous isothiourea catalyst that promotes an enantioselective Michael-lactonization process upon a silicon-oxide supported SAM functionalized with a reactive trifluoroenone group. Chiral atomic force microscopy (χ-AFM) is used to probe the enantiomeric enrichment of the organic films by measurement of the force distributions arising from interaction of d- or l-cysteine-modified AFM tips and the organic films.
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Affiliation(s)
- John D Parkin
- EaStCHEMSchool of Chemistry, University of St. Andrews, North Haugh, St. Andrews, KY16 9ST, UK
| | - Ross Chisholm
- EaStCHEMSchool of Chemistry, University of St. Andrews, North Haugh, St. Andrews, KY16 9ST, UK
| | - Aileen B Frost
- EaStCHEMSchool of Chemistry, University of St. Andrews, North Haugh, St. Andrews, KY16 9ST, UK
| | - Richard G Bailey
- EaStCHEMSchool of Chemistry, University of St. Andrews, North Haugh, St. Andrews, KY16 9ST, UK
| | - Andrew D Smith
- EaStCHEMSchool of Chemistry, University of St. Andrews, North Haugh, St. Andrews, KY16 9ST, UK
| | - Georg Hähner
- EaStCHEMSchool of Chemistry, University of St. Andrews, North Haugh, St. Andrews, KY16 9ST, UK
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44
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Jin H, Lee J, Shi H, Lee JY, Yoo EJ, Song CE, Ryu DH. Bioinspired Synthesis of Chiral 3,4-Dihydropyranones via S-to-O Acyl-Transfer Reactions. Org Lett 2018; 20:1584-1588. [DOI: 10.1021/acs.orglett.8b00331] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hui Jin
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
| | - Juyeol Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
| | - Hu Shi
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Jin Yong Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
| | - Eun Jeong Yoo
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Korea
| | - Choong Eui Song
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
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45
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Olaizola I, Campano TE, Iriarte I, Vera S, Mielgo A, García JM, Odriozola JM, Oiarbide M, Palomo C. α-Hydroxy Ketones as Masked Ester Donors in Brønsted Base Catalyzed Conjugate Additions to Nitroalkenes. Chemistry 2018; 24:3893-3901. [DOI: 10.1002/chem.201705968] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Iurre Olaizola
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Teresa E. Campano
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Igor Iriarte
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Silvia Vera
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Jesús M. García
- Departamento de Química Aplicada; Institute for Advanced Materials (INAMAT); Universidad Pública de Navarra; 31006 Pamplona Spain
| | - José M. Odriozola
- Departamento de Química Aplicada; Institute for Advanced Materials (INAMAT); Universidad Pública de Navarra; 31006 Pamplona Spain
| | - Mikel Oiarbide
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I; Universidad del País Vasco UPV/EHU; Manuel Lardizabal 3 20018 San Sebastián Spain
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46
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Hu Y, Pan D, Cong L, Yao Y, Yu C, Li T, Yao C. NHC-Catalyzed Efficient Syntheses of Isoquinolinones or Isochromanones through Formal [4+2] Cycloaddition of o
-Quinodimethanes with Acylhydrazones or Ketones. ChemistrySelect 2018. [DOI: 10.1002/slct.201702925] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Yong Hu
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Di Pan
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Lin Cong
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Yibiao Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Chenxia Yu
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Tuanjie Li
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
| | - Changsheng Yao
- Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials; School of Chemistry and Materials Science; Jiangsu Normal university, Xuzhou; Jiangsu 221116, P.R. China
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47
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Van KN, Romo D. Multicomponent, Enantioselective Michael-Michael-Aldol-β-Lactonizations Delivering Complex β-Lactones. J Org Chem 2018; 83:632-643. [PMID: 29219311 DOI: 10.1021/acs.joc.7b02543] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Optically active, tertiary amine Lewis bases react with unsaturated acid chlorides to deliver chiral, α,β-unsaturated acylammonium salts. These intermediates participate in a catalytic, enantioselective, three-component process delivering bi- and tricyclic β-lactones through a Michael-Michael-aldol-β-lactonization. In a single operation, the described multicomponent, organocascade process forms complex bi- and tricyclic β-lactones by generating four new bonds, two rings, and up to four contiguous stereocenters. In the racemic series, yields of 22-75% were achieved using 4-pyrrolidinopyridine as Lewis base. In the enantioselective series employing isothiourea catalysts, a kinetic resolution of the initially formed racemic Michael adduct appears operative, providing yields of 46% to quantitative (based on 50% max) with up to 94:6 er. Some evidence for a dynamic kinetic asymmetric transformation for tricyclic-β-lactone 1d was obtained following optimization (yields up to 61%, 94:6 er) through a presumed reversible Michael.
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Affiliation(s)
- Khoi N Van
- Department of Chemistry, Texas A&M University , College Station, Texas 77842, United States
| | - Daniel Romo
- Department of Chemistry & Biochemistry, Baylor University , Waco, Texas 76798, United States
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48
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Neyyappadath RM, Chisholm R, Greenhalgh MD, Rodríguez-Escrich C, Pericàs MA, Hähner G, Smith AD. Acylative Kinetic Resolution of Alcohols Using a Recyclable Polymer-Supported Isothiourea Catalyst in Batch and Flow. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04001] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Ross Chisholm
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Mark D. Greenhalgh
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - 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
- Department
de Química Inorgànica i Orgànica, Universitat de Barcelona, 08080 Barcelona, Spain
| | - Georg Hähner
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Andrew D. Smith
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
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49
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Zhang ZJ, Song J. An isothiourea-catalyzed asymmetric formal [4 + 2] cycloaddition of in situ generated azoalkenes with C1 ammonium enolates. Org Chem Front 2018. [DOI: 10.1039/c8qo00657a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An efficient isothiourea-catalyzed stereoselective formal [4 + 2] cycloaddition of α-chloro cyclic hydrazones with carboxylic acids has been developed.
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Affiliation(s)
- Zi-Jing Zhang
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Jin Song
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
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50
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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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