1
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Kitagaki S, Nakayoshi T, Masunaka S, Uchida A, Inano M, Yoshida E, Washino Y, Aoyama H, Yoshida K. Highly regio- and stereoselective (3 + 2) annulation reaction of allenoates with 3-methyleneindolin-2-ones catalyzed by a planar chiral [2.2]paracyclophane-based bifunctional phosphine-phenol catalyst. Org Biomol Chem 2024. [PMID: 39005149 DOI: 10.1039/d4ob00831f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
A planar chiral [2.2]paracyclophane-based phosphine-phenol catalyst catalyzed the (3 + 2) annulation reaction of ethyl 2,3-butadienoate with 3-methyleneindolin-2-ones to produce 2,5-disubstituted cyclopentene-fused C3-spirooxindoles in high yields with high regio-, diastereo-, and enantioselectivities. This catalyst was suitable for reactions of not only benzylideneindolinones but also alkylideneindolinones, the chiral phosphine-catalyzed reactions of which have not yet been reported. Density functional theory calculations suggested that the formation of hydrogen bonds between the phenolic OH group of the catalyst and the allenoate carbonyl group, rather than between the OH group and the carbonyl group of indolinone, contributed to the formation of an efficient reaction space at the enantiodetermining step.
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Affiliation(s)
- Shinji Kitagaki
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Tomoki Nakayoshi
- Laboratory of Biophysical Chemistry, Faculty of Pharmacy, Meijo University, Nagoya, Aichi 468-8503, Japan
- Graduate School of Information Sciences, Hiroshima City University, Hiroshima-shi, Hiroshima 731-3194, Japan
| | - Sota Masunaka
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Akane Uchida
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Mai Inano
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Emika Yoshida
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Yusuke Washino
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Hiroshi Aoyama
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Keisuke Yoshida
- Laboratory of Medicinal Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
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2
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Zhao Y, Luo Y, Liu J, Zheng C, Zhao G. Multiple Hydrogen-Bonding Catalysts Enhance the Asymmetric Cyanation of Ketimines and Aldimines. Chemistry 2023; 29:e202302061. [PMID: 37463871 DOI: 10.1002/chem.202302061] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/20/2023]
Abstract
A highly enantioselective cyanation of imines (up to >99 % ee) has been developed using well-designed C2 -symmetric hydrogen bonding catalysts. The catalytic strategy was characterized with low catalyst loading (0.1-1 mol %), easily accessible catalysts with diverse functional groups, and catalytic base additives. A wide range of imines, including the challenging N-Boc and N-Cbz protected ketimines and aldimines, as well as fluoroalkylated ketimines, were investigated under mild conditions to afford the products with good to excellent yields (up to 99 % yield) and high enantioselectivity (up to >99 % ee). Control experiments revealed that the multiple hydrogen bonding catalysts enhanced the reactivity and enantioselectivity of the Strecker reaction initiated by the base.
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Affiliation(s)
- Yunhui Zhao
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, P. R. China
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecular, Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, P. R. China
| | - Yueyang Luo
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, P. R. China
| | - Jun Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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Wojaczyńska E, Steppeler F, Iwan D, Scherrmann MC, Marra A. Synthesis and Applications of Carbohydrate-Based Organocatalysts. Molecules 2021; 26:7291. [PMID: 34885873 PMCID: PMC8659088 DOI: 10.3390/molecules26237291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 12/22/2022] Open
Abstract
Organocatalysis is a very useful tool for the asymmetric synthesis of biologically or pharmacologically active compounds because it avoids the use of noxious metals, which are difficult to eliminate from the target products. Moreover, in many cases, the organocatalysed reactions can be performed in benign solvents and do not require anhydrous conditions. It is well-known that most of the above-mentioned reactions are promoted by a simple aminoacid, l-proline, or, to a lesser extent, by the more complex cinchona alkaloids. However, during the past three decades, other enantiopure natural compounds, the carbohydrates, have been employed as organocatalysts. In the present exhaustive review, the detailed preparation of all the sugar-based organocatalysts as well as their catalytic properties are described.
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Affiliation(s)
- Elżbieta Wojaczyńska
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Franz Steppeler
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Dominika Iwan
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Marie-Christine Scherrmann
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
| | - Alberto Marra
- Institut des Biomolécules Max Mousseron (IBMM-UMR 5247), Université de Montpellier, Pôle Chimie Balard Recherche, 1919 Route de Mende, 34293 Montpellier, France
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Felder S, Wu S, Brom J, Micouin L, Benedetti E. Enantiopure planar chiral [2.2]paracyclophanes: Synthesis and applications in asymmetric organocatalysis. Chirality 2021; 33:506-527. [PMID: 34302702 DOI: 10.1002/chir.23335] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/14/2021] [Indexed: 12/20/2022]
Abstract
This short review focuses on enantiopure planar chiral [2.2]paracyclophanes (pCps), a fascinating class of molecules that possess an unusual three-dimensional core and intriguing physicochemical properties. In the first part of the review, different synthetic strategies for preparing optically active pCps are described. Although classical resolution methods based on the synthesis and separation of diastereoisomeric products still dominate the field, recent advances involving the kinetic resolution of racemic compounds and the desymmetrization of meso derivatives open up new possibilities to access enantiopure key intermediates on synthetically useful scales. Due to their advantageous properties including high configurational and chemical stability, [2.2]paracyclophanes are increasingly employed in various research fields, ranging from stereoselective synthesis to material sciences. The applications of [2.2]paracyclophanes in asymmetric organocatalysis are described in the second part of the review. While historically enantiopure pCps have been mainly employed by organic chemists as chiral ligands in transition-metal catalysis, these compounds can also be used as efficient catalysts in metal-free reactions and may inspire the development of new transformations in the near future.
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Affiliation(s)
- Simon Felder
- Laboratoire de Chimie et Biochimie Pharmacolgiques et Toxicologiques - UMR8601 CNRS, Université de Paris, Paris, France
| | - Shiqi Wu
- Laboratoire de Chimie et Biochimie Pharmacolgiques et Toxicologiques - UMR8601 CNRS, Université de Paris, Paris, France
| | - Jules Brom
- Laboratoire de Chimie et Biochimie Pharmacolgiques et Toxicologiques - UMR8601 CNRS, Université de Paris, Paris, France
| | - Laurent Micouin
- Laboratoire de Chimie et Biochimie Pharmacolgiques et Toxicologiques - UMR8601 CNRS, Université de Paris, Paris, France
| | - Erica Benedetti
- Laboratoire de Chimie et Biochimie Pharmacolgiques et Toxicologiques - UMR8601 CNRS, Université de Paris, Paris, France
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Kitagaki S, Shimo E, Takeda S, Fukai R, Kojima N, Yoshioka S, Takenaga N, Yoshida K. Planar Chiral [2.2]Paracyclophane-Based Bis(thiourea)-Catalyzed Highly Diastereo- and Enantioselective Michael Addition Reaction of Nitroethane to Nitrostyrenes. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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6
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Kitagaki S, Tsuji M, Teramoto H, Takenaga N, Yoshida K. Planar Chiral Phosphino[2.2]paracyclophanol-Catalyzed Highly Regio- and Stereoselective [3+2] Annulation Reaction of Morita–Baylis–Hillman Carbonates with Dicyanomethylideneoxindoles. HETEROCYCLES 2020. [DOI: 10.3987/com-19-s(f)3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Yu QW, Wu LP, Kang TC, Xie J, Sha F, Wu XY. Enantioselective Cyanosilylation of α,α-Dialkoxy Ketones by Using Phosphine-Thiourea Dual-Reagent Catalysis. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qi-Wen Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Lu-Ping Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Tian-Chen Kang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Jin Xie
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Feng Sha
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
| | - Xin-Yan Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; 200237 Shanghai P. R. China
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Affiliation(s)
- Nobuhito Kurono
- Department of Chemistry, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431-3192, Japan
| | - Takeshi Ohkuma
- Division of Applied Chemistry and Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
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11
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He HX, Du DM. Organocatalytic Enantioselective Strecker Reaction of Imines Containing a Thiazole Moiety by Using a Cinchona-Based Squaramide Catalyst. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402764] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Sadhukhan A, Sahu D, Ganguly B, Khan NUH, Kureshy RI, Abdi SHR, Suresh E, Bajaj HC. Oxazoline-Based Organocatalyst for Enantioselective Strecker Reactions: A Protocol for the Synthesis of Levamisole. Chemistry 2013; 19:14224-32. [DOI: 10.1002/chem.201302007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 06/27/2013] [Indexed: 12/22/2022]
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13
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Xu S, Mikulas TC, Zakharov LN, Dixon DA, Liu SY. Boron-substituted 1,3-dihydro-1,3-azaborines: synthesis, structure, and evaluation of aromaticity. Angew Chem Int Ed Engl 2013; 52:7527-31. [PMID: 23749749 DOI: 10.1002/anie.201302660] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Indexed: 11/07/2022]
Abstract
Getting the family together: A general synthetic strategy based on nucleophilic substitution provided B-substituted 1,3-dihydro-1,3-azaborines (see scheme), BN isosteres of arenes with potential for application in biomedicine and materials science. Experimental structural analysis and calculations suggest that the aromaticity of the 1,3-dihydro-1,3-azaborine heterocycle is intermediate between that of benzene and that of 1,2-dihydro-1,2-azaborine.
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Affiliation(s)
- Senmiao Xu
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403-1253, USA
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Xu S, Mikulas TC, Zakharov LN, Dixon DA, Liu SY. Boron-Substituted 1,3-Dihydro-1,3-azaborines: Synthesis, Structure, and Evaluation of Aromaticity. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302660] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Saravanan S, Khan NUH, Bera PK, Kureshy RI, Abdi SHR, Kumari P, Bajaj HC. Catalysis of Enantioselective Strecker Reaction in the Synthesis ofD-Homophenylalanine Using Recyclable, Chiral, Macrocyclic MnIII-Salen Complexes. ChemCatChem 2013. [DOI: 10.1002/cctc.201200700] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Xie H, Song A, Song X, Zhang X, Wang W. Organocatalytic enantioselective Strecker reaction of cyclic trifluoromethyl-ketoimines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.119] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Duan W, Ma Y, He F, Zhao L, Chen J, Song C. Synthesis of novel planar chiral Ag and Rh N-heterocyclic carbene complexes derived from [2.2]paracyclophane and their application in ultrasound assisted asymmetric addition reactions of organoboronic acids to aldehydes. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.01.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Kitagaki S, Ohta Y, Takahashi R, Komizu M, Mukai C. Planar chiral [2.2]paracyclophane-based phosphine-Brønsted acid catalysts bearing exceptionally high reactivity for aza-Morita–Baylis–Hillman reaction. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Li NK, Liu ZM, Huang XF, Zhang JX, Chen X, Wang Y, Wang XW. Enantioselective Strecker-type reaction between azomethine imines and trimethylsilyl cyanide catalyzed by a cinchona alkaloid-derived thiourea bearing multiple hydrogen-bonding donors. RSC Adv 2013. [DOI: 10.1039/c3ra41640b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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20
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Su Z, Li W, Wang J, Hu C, Feng X. A Theoretical Investigation on the Strecker Reaction Catalyzed by a TiIV-Complex Catalyst Generated from a Cinchona Alkaloid, Achiral Substituted 2,2′-Biphenol, and Tetraisopropyl Titanate. Chemistry 2012; 19:1637-46. [DOI: 10.1002/chem.201202237] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Revised: 09/28/2012] [Indexed: 11/09/2022]
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21
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Duan W, Ma Y, Qu B, Zhao L, Chen J, Song C. Synthesis of new alkoxy/sulfonate-substituted carbene precursors derived from [2.2]paracyclophane and their application in the asymmetric arylation of aldehydes. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Enders D, Ludwig M, Raabe G. Synthesis and application of the first planar chiral strong brønsted acid organocatalysts. Chirality 2012; 24:215-22. [DOI: 10.1002/chir.21985] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Accepted: 11/02/2011] [Indexed: 11/10/2022]
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23
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Uemura M, Kurono N, Ohkuma T. Enantioselective hydrocyanation of N-protected aldimines. Org Lett 2012; 14:882-5. [PMID: 22260419 DOI: 10.1021/ol203408w] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective hydrocyanation of N-benzyloxycarbonyl aldimines catalyzed by a Ru[(S)-phgly](2)[(S)-binap]/C(6)H(5)OLi system or a bimetallic complex [Li{Ru[(S)-phgly](2)[(S)-binap]}]Cl affords the amino nitriles in 92-99% ee. The reaction is carried out in tert-C(4)H(9)OCH(3) with a substrate-to-catalyst molar ratio in the range of 500-5000 at -20 to 0 °C. Primary, secondary, and tertiary alkyl imines as well as the aryl and heteroaryl substrates are smoothly cyanated to produce the desired products in high yield.
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Affiliation(s)
- Masato Uemura
- Division of Chemical Process Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
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24
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Affiliation(s)
- Jun Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, PR China
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Synthesis of planar chiral pseudo–ortho-substituted aryl[2.2]paracyclophanes by stepwise successive palladium-catalyzed coupling reactions. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.05.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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De Rycke N, Marrot J, Couty F, David ORP. DMAP-[2.2]paracyclophane: Observation of an Unusual C-C Insertion. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001623] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Puglisi A, Benaglia M, Raimondi L, Lay L, Poletti L. Novel carbohydrate-based bifunctional organocatalysts for nucleophilic addition to nitroolefins and imines. Org Biomol Chem 2011; 9:3295-302. [DOI: 10.1039/c0ob01240h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Enders D, Gottfried K, Raabe G. Organocatalytic Enantioselective Strecker Synthesis of α-Quaternary α-Trifluoromethyl Amino Acids. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000666] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Sergeeva EV, Shuklov IA, Antonov DY, Vorontsova NV, Vorontsov EV, Starikova ZA, Il’in MM, Rozenberg VI. Resolution approaches to enantiomers of 4-formyl[2.2]paracyclophane. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.05.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Zuend SJ, Jacobsen EN. Mechanism of amido-thiourea catalyzed enantioselective imine hydrocyanation: transition state stabilization via multiple non-covalent interactions. J Am Chem Soc 2010; 131:15358-74. [PMID: 19778044 DOI: 10.1021/ja9058958] [Citation(s) in RCA: 201] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An experimental and computational investigation of amido-thiourea promoted imine hydrocyanation has revealed a new and unexpected mechanism of catalysis. Rather than direct activation of the imine by the thiourea, as had been proposed previously in related systems, the data are consistent with a mechanism involving catalyst-promoted proton transfer from hydrogen isocyanide to imine to generate diastereomeric iminium/cyanide ion pairs that are bound to catalyst through multiple noncovalent interactions; these ion pairs collapse to form the enantiomeric alpha-aminonitrile products. This mechanistic proposal is supported by the observation of a statistically significant correlation between experimental and calculated enantioselectivities induced by eight different catalysts (P << 0.01). The computed models reveal a basis for enantioselectivity that involves multiple stabilizing and destabilizing interactions between substrate and catalyst, including thiourea-cyanide and amide-iminium interactions.
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Affiliation(s)
- Stephan J Zuend
- Harvard University, Department of Chemistry & Chemical Biology, Cambridge, Massachusetts 02138, USA
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31
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Zhang GW, Zheng DH, Nie J, Wang T, Ma JA. Brønsted acid-catalyzed efficient Strecker reaction of ketones, amines and trimethylsilyl cyanide. Org Biomol Chem 2010; 8:1399-405. [DOI: 10.1039/b924272d] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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33
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Itoh T, Toyoshima E, Miyazaki M, Kanemitsu T. Asymmetric Acyl-Strecker Reaction Promoted by Novel Thiourea Organocatalyst. HETEROCYCLES 2010. [DOI: 10.3987/com-10-12055] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Liu YL, Zhou F, Cao JJ, Ji CB, Ding M, Zhou J. A facile method for the synthesis of oxindole based quaternary α-aminonitriles via the Strecker reaction. Org Biomol Chem 2010; 8:3847-50. [DOI: 10.1039/c0ob00174k] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Karimi B, Maleki A, Elhamifar D, Clark JH, Hunt AJ. Self-assembled organic–inorganic hybrid silica with ionic liquid framework: a novel support for the catalytic enantioselective Strecker reaction of imines using Yb(OTf)3–pybox catalyst. Chem Commun (Camb) 2010; 46:6947-9. [DOI: 10.1039/c0cc01426e] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Gawronski J, Wascinska N, Gajewy J. Recent progress in Lewis base activation and control of stereoselectivity in the additions of trimethylsilyl nucleophiles. Chem Rev 2009; 108:5227-52. [PMID: 18850749 DOI: 10.1021/cr800421c] [Citation(s) in RCA: 251] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jacek Gawronski
- Department of Chemistry, A. Mickiewicz University, Poznań, Poland
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Wang J, Wang W, Li W, Hu X, Shen K, Tan C, Liu X, Feng X. Asymmetric Cyanation of Aldehydes, Ketones, Aldimines, and Ketimines Catalyzed by a Versatile Catalyst Generated from Cinchona Alkaloid, Achiral Substituted 2,2′-Biphenol and Tetraisopropyl Titanate. Chemistry 2009; 15:11642-59. [DOI: 10.1002/chem.200900936] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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A practical synthesis of optically active arylglycines via catalytic asymmetric Strecker reaction. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.04.098] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Reingruber R, Baumann T, Dahmen S, Bräse S. Use of the Chiral Pool - Practical Asymmetric Organocatalytic Strecker Reaction with Quinine. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200800798] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hatano M, Hattori Y, Furuya Y, Ishihara K. Chiral Lanthanum(III)-Binaphthyldisulfonate Complexes for Catalytic Enantioselective Strecker Reaction. Org Lett 2009; 11:2321-4. [DOI: 10.1021/ol900680f] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manabu Hatano
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yasushi Hattori
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yoshiro Furuya
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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Karimi B, Maleki A. Catalytic asymmetric Strecker hydrocyanation of imines using Yb(OTf)3–pybox catalysts. Chem Commun (Camb) 2009:5180-2. [DOI: 10.1039/b908854g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
An convenient reagent for the one-carbon homologation of an aldehyde to the corresponding alkyne is reported. This reagent allows this conversion to conveniently be carried out on a large scale under ambient conditions.
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Wen Y, Gao B, Fu Y, Dong S, Liu X, Feng X. Asymmetric three-component Strecker reactions catalyzed by trans-4-hydroxy-L-proline-derived N,N'-dioxides. Chemistry 2008; 14:6789-95. [PMID: 18551491 DOI: 10.1002/chem.200800319] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Novel trans-4-hydroxy-L-proline-derived N,N'-dioxides have been developed and used as efficient organocatalysts for the one-pot three-component Strecker reaction with an aldehyde, (1,1-diphenyl)methylamine, and TMSCN. Both aromatic and aliphatic aldehydes were found to be suitable substrates. The corresponding alpha-amino nitriles were obtained in high yields with up to 95 % ee (ee=enantiomeric excess) under mild conditions. Optically pure products could be obtained after a single recrystallization. The catalyst can be easily prepared from trans-4-hydroxy-L-proline and a diamine in three steps. Based on the experimental results and the observed absolute configurations of the products, a possible transition state has been proposed to explain the origin of the asymmetric induction.
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Affiliation(s)
- Yuehong Wen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
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Hou Z, Wang J, Liu X, Feng X. Highly Enantioselective Strecker Reaction of Ketoimines Catalyzed by an Organocatalyst from (S)-BINOL andL-Prolinamide. Chemistry 2008; 14:4484-6. [DOI: 10.1002/chem.200800454] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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