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Li XH, Gong JF, Song MP. Diastereoselective synthesis of chiral 3-substituted isoindolinones via rhodium(III)-catalyzed oxidative C-H olefination/annulation. Org Biomol Chem 2021; 19:5876-5887. [PMID: 34126629 DOI: 10.1039/d1ob00656h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A new method for the direct and stereoselective synthesis of 3-substituted isoindolinones via Rh(iii)-catalyzed chiral N-sulfinyl amide directed asymmetric [4 + 1] annulation of benzamides with acrylic esters has been developed. The reaction proceeded through an oxidative C-H olefination and a subsequent cyclization by intramolecular aza-Michael addition, producing a series of diastereoisomeric chiral isoindolinones (20 examples) in generally good yields with a dr value up to 5.5 : 1. The absolute configurations of the newly formed C-stereocenters in the major and minor diastereomers of the catalysis product have been determined by X-ray crystal diffraction analysis to be S and R, respectively. The separation of the major diastereoisomers from the catalysis products and subsequent removal of the N-sulfinyl chiral auxiliary afforded enantiomerically pure (S)-isoindolinones. The application of the obtained (S)-isoindolinones in the synthesis of several biologically active isoindolinones such as (S)-PD172938, (S)-pazinaclone and (S)-pagoclone is presented.
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Affiliation(s)
- Xue-Hong Li
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
| | - Jun-Fang Gong
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
| | - Mao-Ping Song
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
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2
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Cantú-Reyes M, Alvarado-Beltrán I, Ballinas-Indilí R, Álvarez-Toledano C, Hernández-Rodríguez M. Stereodivergent Mannich reaction of bis(trimethylsilyl)ketene acetals with N-tert-butanesulfinyl imines by Lewis acid or Lewis base activation, a one-pot protocol to obtain chiral β-amino acids. Org Biomol Chem 2017; 15:7705-7709. [PMID: 28875215 DOI: 10.1039/c7ob01853c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a one-pot synthesis of chiral β2,2,3-amino acids by the Mannich addition of bistrimethylsilyl ketene acetals to N-tert-butanesulfinyl imines followed by the removal of the chiral auxiliary. The synthesis and isolation of pure β-amino acid hydrochlorides were conducted under mild conditions, without strong bases and this method is operationally simple. The stereoselective reaction was promoted by two different activation methods that lead to different stereoisomers: (1) Lewis Acid (LA) catalysis with boron trifluoride diethyl etherate and (2) Lewis Base (LB) catalysis with tetrabutylammonium difluorotriphenylsilicate. The reaction presented good diastereoselectivity with LB activation and moderate to good dr with LA catalysis. The exceptions in both protocols were imines with electron donating groups in the aromatic ring.
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Affiliation(s)
- Margarita Cantú-Reyes
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510, Cd. Mx., Mexico.
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3
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Wangweerawong A, Hummel JR, Bergman RG, Ellman JA. Preparation of Enantiomerically Pure Perfluorobutanesulfinamide and Its Application to the Asymmetric Synthesis of α-Amino Acids. J Org Chem 2016; 81:1547-57. [PMID: 26844947 DOI: 10.1021/acs.joc.5b02700] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A high yielding and practical two-step synthesis of enantiomerically pure perfluorobutanesulfinamide from Senanayake's 2-aminoindanol-derived sulfinyl transfer reagent was developed and carried out on a multigram scale. Straightforward condensation of this sulfinamide with ethyl glyoxylate provided the N-perfluorobutanesulfinyl imino ester. The utility of this activated N-sulfinyl imino ester was demonstrated for reactions that gave either no product or very low yields with the corresponding less electrophilic N-tert-butanesulfinyl derivative. Specifically, the Rh(III)-catalyzed C-H bond addition of aromatic compounds to the N-perfluorobutanesulfinyl imino ester provided arylglycines with very high diastereoselectivities for a range of directing groups including pyrrolidine amide, azo, sulfoximine, 1-pyrazole, and 1,2,3-triazole functionalities. Thermal asymmetric aza-Diels-Alder reactions also proceeded in good yields and with high selectivity, including for the substituted dienes (E)-1,3-pentadiene and (2E,4E)-2,4-hexadiene.
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Affiliation(s)
- Apiwat Wangweerawong
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520-8170, United States
| | - Joshua R Hummel
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520-8170, United States
| | - Robert G Bergman
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California , Berkeley, California 94720, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520-8170, United States
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4
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Fuchise K, Tsuchida S, Takada K, Chen Y, Satoh T, Kakuchi T. B(C 6F 5) 3-Catalyzed Group Transfer Polymerization of n-Butyl Acrylate with Hydrosilane through In Situ Formation of Initiator by 1,4-Hydrosilylation of n-Butyl Acrylate. ACS Macro Lett 2014; 3:1015-1019. [PMID: 35610785 DOI: 10.1021/mz5004689] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The group transfer polymerization (GTP) of n-butyl acrylate (nBA) using hydrosilane (R3SiH) and tris(pentafluorophenyl)borane (B(C6F5)3) has been studied, which did not need to use the initiator of a silyl ketene acetal (SKA) as the starting polymerization component. B(C6F5)3 catalyzed the in situ 1,4-hydrosilylation of nBA by R3SiH to generate the corresponding SKA prior to the polymerization of nBA, which was confirmed by the 1H NMR measurement of the model reaction. The formed SKA performed as the initiator for the B(C6F5)3-catalyzed GTP of nBA leading to well-defined polymers with targeted molar masses and low dispersities.
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Affiliation(s)
- Keita Fuchise
- Graduate School of Chemical Sciences and Engineering, ‡Division of Biotechnology
and Macromolecular Chemistry, and ∥Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Shinji Tsuchida
- Graduate School of Chemical Sciences and Engineering, ‡Division of Biotechnology
and Macromolecular Chemistry, and ∥Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Kenji Takada
- Graduate School of Chemical Sciences and Engineering, ‡Division of Biotechnology
and Macromolecular Chemistry, and ∥Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Yougen Chen
- Graduate School of Chemical Sciences and Engineering, ‡Division of Biotechnology
and Macromolecular Chemistry, and ∥Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Toshifumi Satoh
- Graduate School of Chemical Sciences and Engineering, ‡Division of Biotechnology
and Macromolecular Chemistry, and ∥Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Toyoji Kakuchi
- Graduate School of Chemical Sciences and Engineering, ‡Division of Biotechnology
and Macromolecular Chemistry, and ∥Frontier Chemistry Center, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan
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5
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Janssen GV, Vicente-García E, Vogel W, Slootweg JC, Ruijter E, Lammertsma K, Orru RVA. Stereoselective Synthesis of β-Sulfinylamino Isocyanides and 2-Imidazolines. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402210] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Hennum M, Fliegl H, Gundersen LL, Eisenstein O. Mechanistic Insights on the Stereoselective Nucleophilic 1,2-Addition to Sulfinyl Imines. J Org Chem 2014; 79:2514-21. [DOI: 10.1021/jo402802j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Martin Hennum
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Heike Fliegl
- Centre for Theoretical and Computational Chemistry,
Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Lise-Lotte Gundersen
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Odile Eisenstein
- Centre for Theoretical and Computational Chemistry,
Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
- Institut Charles Gerhardt, CNRS 5253, Université Montpellier 2, cc 1501,
Place Eugène Bataillon, F-34095 Montpellier, France
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7
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Aslam NA, Babu SA, Sudha AJ, Yasuda M, Baba A. Chelation-controlled diastereoselective construction of N-aryl-, N-acyl/tosylhydrazono β-substituted aspartate derivatives via Barbier-type reaction. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.130] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Ruan ST, Luo JM, Du Y, Huang PQ. Asymmetric Vinylogous Mannich Reactions: A Versatile Approach to Functionalized Heterocycles. Org Lett 2011; 13:4938-41. [DOI: 10.1021/ol2020384] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shu-Tang Ruan
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Jie-Min Luo
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Yu Du
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, P. R. China
- State Key Laboratory of Bioorganic and Natural Products Chemistry, 354 Fenglin Lu, Shanghai 200032, P. R. China
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9
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Shimizu M, Kusunoki T, Yoshida M, Kondo K, Mizota I. Efficient Mannich Reaction Using Iminium Salts Generated from Glycine Derivatives. CHEM LETT 2011. [DOI: 10.1246/cl.2011.351] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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10
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Gassa F, Contini A, Fontana G, Pellegrino S, Gelmi ML. A Highly Diastereoselective Synthesis of α-Hydroxy-β-amino Acid Derivatives via a Lewis Acid Catalyzed Three-Component Condensation Reaction. J Org Chem 2010; 75:7099-106. [DOI: 10.1021/jo1011762] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Federico Gassa
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
| | - Alessandro Contini
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
| | | | - Sara Pellegrino
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
| | - Maria Luisa Gelmi
- DISMAB, Sezione di Chimica Organica “A. Marchesini” Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy
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11
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Robak MT, Herbage MA, Ellman JA. Synthesis and applications of tert-butanesulfinamide. Chem Rev 2010; 110:3600-740. [PMID: 20420386 DOI: 10.1021/cr900382t] [Citation(s) in RCA: 908] [Impact Index Per Article: 64.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- MaryAnn T Robak
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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12
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Zhang H, Chuan Y, Li Z, Peng Y. 4-Aminothiourea Prolinoltert-Butyldiphenylsilyl Ether: A Chiral Secondary Amine-Thiourea as Organocatalyst for Enantioselectiveanti-Mannich Reactions. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900399] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Catalytic enantioselective conjugate addition of aromatic amines to fumarate derivatives: asymmetric synthesis of aspartic acid derivatives. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.05.037] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Gu CL, Liu L, Wang D, Chen YJ. Tunable and Highly Regio- and Diastereoselective Vinylogous Mannich-Type Reaction of Dioxinone-Derived Silyl Dienolate. J Org Chem 2009; 74:5754-7. [DOI: 10.1021/jo900977y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chun-Ling Gu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yong-Jun Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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15
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Andreassen T, Lorentzen M, Hansen LK, Gautun OR. The use of two optically active N-sulfinyl α-imino esters in the stereoselective aza-Diels–Alder reaction. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.01.090] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Ferreira F, Botuha C, Chemla F, Pérez-Luna A. tert-Butanesulfinimines: structure, synthesis and synthetic applications. Chem Soc Rev 2009; 38:1162-86. [PMID: 19421587 DOI: 10.1039/b809772k] [Citation(s) in RCA: 288] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Since Ellman's seminal works, over the past ten years tert-butanesulfinimines have proved to be useful chiral amino intermediates for organic synthesis. Through highly stereoselective reactions, amongst which reductions, nucleophilic 1,2-additions and ylide condensations, a broad range of nitrogen-containing compounds has been synthesized. Although the stereoselectivity levels are high in most cases, the sense of the stereoinduction is generally not predictable. The object of this critical review is to present the models proposed to rationalize the stereochemical outcome of the reactions involving tert-butanesulfinimines and to point out an obvious lack of homogeneity amongst them (128 references).
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Affiliation(s)
- Franck Ferreira
- UPMC Univ Paris 06, UMR 7611, Laboratoire de Chimie Organique, Institut de Chimie Moléculaire (FR 2769), case 183, 4 place Jussieu, F-75005, Paris, France.
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17
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Andreassen T, Hansen LK, Gautun OR. Diastereoselective Synthesis of Heteroaromatic Glycine Derivatives. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800622] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Huber DP, Kehr G, Bergander K, Fröhlich R, Erker G, Tanino S, Ohki Y, Tatsumi K. Heterolytic Cleavage of Dihydrogen by Frustrated Lewis Pairs Derived from α-(Dimesitylphosphino)ferrocenes and B(C6F5)3. Organometallics 2008. [DOI: 10.1021/om800339c] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dominique P. Huber
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Gerald Kehr
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Klaus Bergander
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Roland Fröhlich
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Gerhard Erker
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Soichiro Tanino
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Yasuhiro Ohki
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - Kazuyuki Tatsumi
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster, Germany, and Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
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19
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Nguyen TB, Vuong TMH, Martel A, Dhal R, Dujardin G. Practical asymmetric access to carboxy-differentiated aspartate derivatives via 1,3-dipolar cycloaddition of a nitrone with (R)-4-ethyl-N-vinyloxazolidin-2-one. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.08.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Kiss L, Mangelinckx S, Sillanpää R, Fülöp F, De Kimpe N. An Easy Stereoselective Access to β,γ-Aziridino α-Amino Ester Derivatives via Mannich Reaction of Benzophenone Imines of Glycine Esters with N-Sulfonyl α-Chloroaldimines. J Org Chem 2007; 72:7199-206. [PMID: 17705431 DOI: 10.1021/jo0710634] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mannich-type addition of benzophenone imine glycinates across newly synthesized N-(p-toluenesulfonyl) alpha-chloroaldimines afforded gamma-chloro-alpha,beta-diamino ester derivatives with moderate diastereoselectivity as separable mixtures of anti and syn diastereomers. The gamma-chloro-alpha,beta-diamino esters were efficiently cyclized under basic conditions to the corresponding beta,gamma-aziridino alpha-amino ester derivatives, representing a new class of conformationally constrained heterocyclic alpha,beta-diamino acid derivatives. The relative configuration of the aziridines was determined via X-ray diffraction analysis. Mechanisms and intermediate transition states to explain the stereochemical outcome of the Mannich reaction with different substrates or under different conditions are proposed. The synthetic importance of the beta,gamma-aziridino alpha-amino ester derivatives is demonstrated by their conversion into the corresponding Boc-protected derivatives and ring opening reactions to alpha,beta-diamino esters and a gamma-amino alpha,beta-unsaturated amino ester.
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Affiliation(s)
- Loránd Kiss
- Department of Organic Chemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Iida A, Osada J, Nagase R, Misaki T, Tanabe Y. Mild and Efficient Pentafluorophenylammonium Triflate (PFPAT)-Catalyzed C-Acylations of Enol Silyl Ethers or Ketene Silyl (Thio)Acetals with Acid Chlorides. Org Lett 2007; 9:1859-62. [PMID: 17429977 DOI: 10.1021/ol070191b] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A pentafluorophenylammonium triflate (PFPAT) catalyst (5 mol %) successfully promoted C-acylation of enol silyl ethers with acid chloride to produce various beta-diketones (12 examples; 62-92% yield). Similarly, C-acylation of ketene silyl acetals or ketene silyl thioacetals (i.e., crossed Claisen condensation) proceeded smoothly to provide not only alpha-monoalkylated beta-keto (thio)esters but also thermodynamically unfavorable (less accessible) alpha,alpha-dialkylated beta-keto (thio)esters in good to excellent yield (38 examples; 60-92% yield).
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Affiliation(s)
- Akira Iida
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, Japan
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23
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Domingo LR, Arnó M, Merino P, Tejero T. A DFT Study of the Molecular Mechanisms of the Nucleophilic Addition of Ester-Derived Lithium Enolates and Silyl Ketene Acetals to Nitrones: Effects of the Lewis Acid Catalyst. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600105] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Arefalk A, Wannberg J, Larhed M, Hallberg A. Stereoselective synthesis of 3-aminoindan-1-ones and subsequent incorporation into HIV-1 protease inhibitors. J Org Chem 2006; 71:1265-8. [PMID: 16438552 DOI: 10.1021/jo0521504] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new method for the stereoselective synthesis of 3-aminoindan-1-ones from triflates of salicylic sulfinyl imines and ethylene glycol vinyl ether has been developed. The reaction sequence starts with a regioselective Heck reaction followed by stereoselective Lewis acid mediated annulation. Acidic cleavage of the sulfinamides produced pure (R)- and (S)-3-aminoindan-1-ones, which were successfully isolated and incorporated into active HIV-1 protease inhibitors.
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Affiliation(s)
- Anna Arefalk
- Organic Pharmaceutical Chemistry, Department of Medicinal Chemistry, Uppsala University, BMC, P.O. Box-574, SE-751 23 Uppsala, Sweden
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25
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Dondoni A, Massi A, Sabbatini S. Multiple Component Approaches to C-Glycosyl β-Amino Acids by Complementary One-Pot Mannich-Type and Reformatsky-Type Reactions. Chemistry 2005; 11:7110-25. [PMID: 16224807 DOI: 10.1002/chem.200500823] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The development of new methods for the preparation of C-glycosyl beta-amino acid libraries with chemical and stereochemical diversity levels was investigated and the results are described herein. Two complementary one-pot three-component Mannich-type and Reformatsky-type synthetic strategies have been developed for the construction of chiral 3-amino propanoate fragments (eventually bis-substituted at C-2) directly linked to the anomeric carbon of pyranose and furanose residues. Both methods involved as the initial step the coupling of a sugar aldehyde to p-methoxybenzylamine but differed in the nucleophile (a d(2) synthon equivalent) which was successively added: a ketene silyl acetal (Mannich route) or a bromozinc enolate (Reformatsky route). Individual C-glycosyl beta-amino esters were isolated as single 3R diastereoisomers in fair to excellent yield (60-90%) and their structure assigned by NMR spectroscopy (Riguera protocol) supported by X-ray crystallography. A tentative explanation of the observed stereochemical outcome based on transition-state models is provided. A preliminary study on the synthesis of alpha,alpha-difluoro C-glycosyl beta-amino acids via a more traditional Reformatsky route is also reported.
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Affiliation(s)
- Alessandro Dondoni
- Laboratorio di Chimica Organica, Dipartimento di Chimica, Università di Ferrara, Via L. Borsari 46, 44100 Ferrara, Italy.
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Kennedy A, Nelson A, Perry A. Methods for the synthesis of polyhydroxylated piperidines by diastereoselective dihydroxylation: exploitation in the two-directional synthesis of aza-C-linked disaccharide derivatives. Beilstein J Org Chem 2005; 1:2. [PMID: 16542015 PMCID: PMC1399450 DOI: 10.1186/1860-5397-1-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2005] [Accepted: 08/26/2005] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Many polyhydroxylated piperidines are inhibitors of the oligosaccharide processing enzymes, glycosidases and glycosyltransferases. Aza-C-linked disaccharide mimetics are compounds in which saturated polyhydroxylated nitrogen and oxygen heterocycles are linked by an all-carbon tether. The saturated oxygen heterocycle has the potential to mimic the departing sugar in a glycosidase-catalysed reaction and aza-C-linked disaccharide mimetics may, therefore, be more potent inhibitors of these enzymes. RESULTS The scope, limitations and diastereoselectivity of the dihydroxylation of stereoisomeric 2-butyl-1-(toluene-4-sulfonyl)-1,2,3,6-tetrahydro-pyridin-3-ols is discussed. In the absence of a 6-substituent on the piperidine ring, the Upjohn (cat. OsO4, NMO, acetone-water) and Donohoe (OsO4, TMEDA, CH2Cl2) conditions allow complementary diastereoselective functionalisation of the alkene of the (2R*,3R*) diastereoisomer. However, in the presence of a 6-substituent, the reaction is largely controlled by steric effects with both reagents. The most synthetically useful protocols were exploited in the two-directional synthesis of aza-C-linked disaccharide analogues. A two-directional oxidative ring expansion was used to prepare bis-enones such as (2R,6S,2'S)-6-methoxy-2-(6-methoxy-3-oxo-3,6-dihydro-2H-pyran-2-ylmethyl)-1-(toluene-4-sulfonyl)-1,6-dihydro-2H-pyridin-3-one from the corresponding difuran. Selective substitution of its N,O acetal was possible. The stereochemical outcome of a two-directional Luche reduction step was different in the two heterocyclic rings, and depended on the conformation of the ring. Finally, two-directional diastereoselective dihydroxylation yielded seven different aza-C-linked disaccharide analogues. CONCLUSION A two-directional approach may be exploited in the synthesis of aza-C-linked disaccharide mimetics. Unlike previous approaches to similar molecules, neither of the heterocyclic rings is directly derived from a sugar, allowing mimetics with unusual configurations to be prepared. The work demonstrates that highly unsymmetrical molecules may be prepared using a two directional approach. The deprotected compounds may have potential as inhibitors of oligosaccharide-processing enzymes and as tools in chemical genetic investigations.
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Affiliation(s)
- Andrew Kennedy
- Synthetic Chemistry, Chemical Development, GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK
| | - Adam Nelson
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Alexis Perry
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
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Takahashi E, Fujisawa H, Yanai T, Mukaiyama T. Lewis Base-catalyzed Diastereoselective Mannich-type Reaction between Ketene Silyl Acetals and Chiral Sulfinimines. CHEM LETT 2005. [DOI: 10.1246/cl.2005.468] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ke B, Qin Y, He Q, Huang Z, Wang F. Preparation of bisindolylalkanes from N-tert-butanesulfinyl aldimines. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.12.140] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jiang ZY, Chan WH, Lee AWM. Synthesis of Enantiopure Sulfinimines (Thiooxime S-Oxides) Catalyzed by Yb(OTf)3 from p-Toluenesulfinamide and Aldehydes in Mild Reaction Conditions. J Org Chem 2005; 70:1081-3. [PMID: 15675877 DOI: 10.1021/jo048597e] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantiomerically pure sulfinimines as important building blocks in the asymmetric synthesis of amine derivatives are prepared in good to excellent yields from chiral p-toluenesulfinamide with aromatic, heteroaromatic, and aliphatic aldehydes. The unprecedented feature of the reported procedure is that the formation of the sulfinimines was achieved by the catalytic action of Yb(OTf)(3) in THF at room temperature. The reaction conditions were also applicable to Ellman's sulfinimines.
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Affiliation(s)
- Zhi-Yong Jiang
- Department of Chemistry and Central Laboratory of the Institute of Molecular Technology for Drug Discovery and Synthesis, Hong Kong Baptist University, Hong Kong, China
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30
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Dobrowolski JC, Kawęcki R. Interaction of sulfinimines with boron trifluoride. A theoretical study. J Mol Struct 2005. [DOI: 10.1016/j.molstruc.2004.09.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chemla F, Ferreira F. High Kinetic Resolution in the Addition of a Racemic Allenylzinc onto Enantiopure N-tert-Butanesulfinimines: Concise Synthesis of Enantiopure trans-2-Ethynylaziridines1. J Org Chem 2004; 69:8244-50. [PMID: 15549794 DOI: 10.1021/jo0490696] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantiopure trans-ethynyl N-tert-butanesulfinylaziridines (R(S))-6 were prepared in good to excellent yields by the condensation of the racemic allenylzinc species 1 derived from 3-chloro-1-trimethylsilylpropyne onto the corresponding enantiopure N-tert-butanesulfinimines (R(S))-5. The absolute stereochemistry of enantiopure N-tert-butanesulfinylaziridines (R(S))-6 was shown to be (R(S),2R,3R) and results from a chelate-type transition state in which the zinc atom of allenylzinc 1 is coordinated by both the nitogen and the oxygen atoms of the imine. Further removal of the N-tert-butanesulfinyl auxiliary of alkyl 3-substituted and 3,3-disubstituted ethynyl N-tert-butanesulfinylaziridines (R(S))-6 could be achieved by treatment with HCl in MeOH affording the corresponding deprotected aziridines (2R,3R)-9 and (2R)-9 respectively as enantiomerically pure compounds.
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Affiliation(s)
- Fabrice Chemla
- UMR 7611, Laboratoire de Chimie Organique, Université Pierre et Marie Curie, Tour 44-45, Case 183, 4 Place Jussieu, 75252 Paris Cedex 05, France
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Jacobsen MF, Ionita L, Skrydstrup T. Highly Diastereoselective Mannich-Type Reactions of Chiral N-Acylhydrazones. J Org Chem 2004; 69:4792-6. [PMID: 15230604 DOI: 10.1021/jo0358170] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Lewis acid-mediated addition of silyl enolates to easily accessible homochiral N-acylhydrazones derived from 3-amino-2-oxazolidinones proceeded in yields up to 71% and diastereomeric ratios of 99:1. In most cases, optimal reaction conditions entailed the simple use of ZnCl(2) in acetonitrile at room temperature. Hydrazones derived from phenyl-, isopropyl-, and benzyl-substituted 2-oxazolidinones were examined in the reaction in terms of yield and diastereoselectivity. The facile SmI(2)-mediated N-N bond cleavage of the formed hydrazines was demonstrated yielding a beta-amino acid derivative. Hence, the overall reaction sequence constitutes an efficient asymmetric Mannich-type reaction. The sense of diastereoselectivity was explained by a preferential attack on the less shielded Si face of the chiral hydrazones and confirmed by means of X-ray crystallography.
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Affiliation(s)
- Mikkel F Jacobsen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, 8000 Aarhus C, Denmark
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Dondoni A, Massi A, Sabbatini S, Bertolasi V. Synthesis of C-glycosyl β-amino acids by asymmetric Mannich-type three-component reactions. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.01.070] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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