1
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McNeill F, Twamley B, Guiry PJ. Asymmetric Synthesis of Quaternary α-Aryl Stereocentres in Benzofuran-3(2H)-Ones Using Decarboxylative Asymmetric Allylic Alkylation. Chemistry 2024:e202401738. [PMID: 38752722 DOI: 10.1002/chem.202401738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Indexed: 06/27/2024]
Abstract
The Pd-catalysed decarboxylative asymmetric allylic alkylation (DAAA) has been applied to the enantioselective synthesis of sterically hindered benzofuran-3(2H)-one-derived α-aryl-β-keto esters employing the (R,R)-ANDEN phenyl Trost ligand. A range of substrates were synthesised, employing previously developed aryllead triacetate methodology to install various aryl groups. The resulting α-aryl-α-allyl benzofuran-3(2H)-one DAAA products were obtained in moderate to high yields and in enantioselectivities of up to 96 % ee, with the best results observed for substrates containing a di-ortho-substitution pattern on the aryl ring as well as naphthyl-containing substrates.
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Affiliation(s)
- Fionn McNeill
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin Belfield, Dublin 4, Ireland
| | - Brendan Twamley
- School of Chemistry, Trinity College Dublin, The University of Dublin College Green, Dublin 2, Ireland
| | - Patrick J Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin Belfield, Dublin 4, Ireland
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2
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Gavrilov KN, Chuchelkin IV, Firsin ID, Trunina VM, Gavrilov VK, Zheglov SV, Fedorov DA, Tafeenko VA, Zamilatskov IA, Zimarev VS, Goulioukina NS. TADDOL-based P, S-bidentate phosphoramidite ligands in palladium-catalyzed asymmetric allylic substitution. Org Biomol Chem 2024; 22:538-549. [PMID: 38111353 DOI: 10.1039/d3ob01891a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
A series of easy-to-prepare and modular chiral P,S-bidentate phosphoramidites were synthesized. With respect to Pd(II), these ligands showed the ability to form stable P,S-chelate allylic complexes. The structures of the ligands and their complexes were confirmed by 2D NMR spectroscopy and single-crystal X-ray diffraction. These chiral inducers provided up to 99% ee in the Pd-catalyzed asymmetric allylic substitution of (E)-1,3-diphenylallyl acetate with C- and N-nucleophiles and up to 94% ee in the Pd-mediated allylic alkylation of cinnamyl esters with β-ketoesters and 2,5-dimethylpyrrole. Furthermore, up to 92% ee with quantitative conversion and chemo- and regioselectivity was achieved in the rare reaction between 2-(diethoxyphosphoryl)-1-phenylallyl acetate and aniline. The effects of the structural parameters, reaction conditions and ligand-to-metal ratio on the catalytic results are discussed. It was shown that the ligands surpass their analogues with different denticity.
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Affiliation(s)
- Konstantin N Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Ilya V Chuchelkin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Ilya D Firsin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Valeria M Trunina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Vladislav K Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Sergey V Zheglov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Denis A Fedorov
- Department of General Physics, Moscow Institute of Physics and Technology, Institutskii per. 9, 141700 Dolgoprudny, Moscow Region, Russian Federation
| | - Victor A Tafeenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Ilya A Zamilatskov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Vladislav S Zimarev
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Nataliya S Goulioukina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
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3
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Pellissier H. TADDOL-derived phosphorus ligands in asymmetric catalysis. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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4
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Inagaki T, Ando T, Sakurai S, Yamanaka M, Tobisu M. Palladium-catalyzed addition of acylsilanes across alkynes via the activation of a C-Si bond. Chem Sci 2023; 14:2706-2712. [PMID: 36908943 PMCID: PMC9993849 DOI: 10.1039/d3sc00181d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/12/2023] [Indexed: 02/16/2023] Open
Abstract
Palladium-catalyzed addition of a C-Si bond in acylsilanes across the triple bonds in an alkyne bearing a carbonyl group at one terminal is reported. The reaction proceeds with excellent regioselectivity, in which a silyl group is incorporated into the carbon α to the carbonyl group, allowing for straightforward access to a variety of functionalized alkenylsilane derivatives. Catalytic synthesis of indanones by annulation between acylsilanes and alkynes with an identical catalytic system is also reported.
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Affiliation(s)
- Tetsuya Inagaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita 565-0871 Osaka Japan
| | - Takahiro Ando
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita 565-0871 Osaka Japan
| | - Shun Sakurai
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita 565-0871 Osaka Japan
| | - Masahiro Yamanaka
- Department of Chemistry and Research Center for Smart Molecules, Faculty of Science, Rikkyo University Nishi-Ikebukuro, Toshima-ku Tokyo 171-8501 Japan
| | - Mamoru Tobisu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita 565-0871 Osaka Japan .,Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI) Suita Osaka 565-0871 Japan
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5
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Stereodivergent total synthesis of rocaglaol initiated by synergistic dual-metal-catalyzed asymmetric allylation of benzofuran-3(2H)-one. Chem 2022. [DOI: 10.1016/j.chempr.2022.04.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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6
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Nagireddy A, Dattatri, Babu Nanubolu J, Sridhar Reddy M. Diastereoselective [2+2+1] Hydrative Annulation of Phenol-Linked 1,6-Enynes with Acetylenes Through Rhodium Catalysis: A Rapid Access to Cyclopenta[b]benzofuranols. Chemistry 2021; 27:17570-17575. [PMID: 34636111 DOI: 10.1002/chem.202102930] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Indexed: 12/18/2022]
Abstract
An unprecedented [2+2+1] hydrative annulation of 1,6-enynes with terminal alkynes is achieved using catalytic cationic Rh(I). Thus, a modular assembly of cyclopenta[b]benzofuranols with two consecutive quarternary stereocenters is achieved from readily available alkynes. The reaction is proposed to go through a sequence of 5-membered rhoda-cycle formation, regioselective acetylene insertion, 1,5 H-shift, substrate controlled stereoselective addition of water molecule followed by 1,2-rhodium migration gave contracted rhoda-cycle D and reductive elimination. Necessary control/labelling experiments were conducted to gain insight in to the mechanism.
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Affiliation(s)
- Attunuri Nagireddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad, 201002, India
| | - Dattatri
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad, 201002, India
| | - Jagadeesh Babu Nanubolu
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India.,Analytical Department, CSIR-IICT, Hyderabad, 500007, India
| | - Maddi Sridhar Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad, 201002, India
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7
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Kamlar M, Henriksson E, Císařová I, Malo M, Sundén H. Synthesis of cis-Oriented Vicinal Diphenylethylenes through a Lewis Acid-Promoted Annulation of Oxotriphenylhexanoates. J Org Chem 2021; 86:8660-8671. [PMID: 34138578 PMCID: PMC8279482 DOI: 10.1021/acs.joc.1c00445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study explores the synthesis of cyclic cis-vicinal phenyl ethylenes from oxotriphenylhexanoates. The reaction is a BBr3-promoted cyclization of 1,6-ketoesters (1) to five-membered diketo compounds (2). The synthesis is interesting as it constitutes one of the few examples of modular stereoselective synthesis of structures with a cis-oriented vicinal diphenylethylene. The core structure of 2 can be smoothly derivatized, which makes it a promising synthetic building block for further stereoselective synthetic applications.
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Affiliation(s)
- Martin Kamlar
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Kemivägen 10, 412 96 Gothenburg, Sweden.,Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic
| | - Elin Henriksson
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Kemivägen 10, 412 96 Gothenburg, Sweden
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic
| | - Marcus Malo
- University of Gothenburg, Department of Chemistry and Molecular Biology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
| | - Henrik Sundén
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Kemivägen 10, 412 96 Gothenburg, Sweden.,University of Gothenburg, Department of Chemistry and Molecular Biology, Kemivägen 10, SE-412 96 Gothenburg, Sweden
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8
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Schuppe AW, Liu Y, Newhouse TR. An invocation for computational evaluation of isomerization transforms: cationic skeletal reorganizations as a case study. Nat Prod Rep 2021; 38:510-527. [PMID: 32931541 PMCID: PMC7956923 DOI: 10.1039/d0np00005a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Covering: 2010 to 2020This review article describes how cationic rearrangement reactions have been used in natural product total synthesis over the last decade as a case study for the many productive ways by which isomerization reactions are enabling for synthesis. This review argues that isomerization reactions in particular are well suited for computational evaluation, as relatively simple calculations can provide significant insight.
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Affiliation(s)
- Alexander W Schuppe
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511-8107, USA.
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9
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Yadykov AV, Yaminova LV, Krayushkin MM, Shirinian VZ. Cyclization of Polarized Divinyl Ketones under Aqueous and Ambient Conditions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202000956] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anton V. Yadykov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. 119991 Moscow Russian Federation
| | - Liana V. Yaminova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. 119991 Moscow Russian Federation
| | - Mikhail M. Krayushkin
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. 119991 Moscow Russian Federation
| | - Valerii Z. Shirinian
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky prosp. 119991 Moscow Russian Federation
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10
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Cao MY, Ma BJ, Lao ZQ, Wang H, Wang J, Liu J, Xing K, Huang YH, Gan KJ, Gao W, Wang H, Hong X, Lu HH. Optically Active Flavaglines-Inspired Molecules by a Palladium-Catalyzed Decarboxylative Dearomative Asymmetric Allylic Alkylation. J Am Chem Soc 2020; 142:12039-12045. [PMID: 32584568 DOI: 10.1021/jacs.0c05113] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
With the aid of a class of newly discovered Trost-type bisphosphine ligands bearing a chiral cycloalkane framework, the Pd-catalyzed decarboxylative dearomative asymmetric allylic alkylation (AAA) of benzofurans was achieved with high efficiency [0.2-1.0 mol% Pd2(dba)3/L], good generality, and high enantioselectivity (>30 examples, 82-99% yield and 90-96% ee). Moreover, a diversity-oriented synthesis (DOS) of previously unreachable flavaglines is disclosed. It features a reliable and scalable sequence of the freshly developed Tsuji-Trost-Stoltz AAA, a Wacker-Grubbs-Stoltz oxidation, an intra-benzoin condensation, and a conjugate addition, which allows the efficient construction of the challenging and compact cyclopenta[b]benzofuran scaffold with contiguous stereocenters. This strategy offers a new avenue for developing flavagline-based drugs.
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Affiliation(s)
- Meng-Yue Cao
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China.,Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Bin-Jie Ma
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Zhi-Qi Lao
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Hongliang Wang
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Jing Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Juan Liu
- Institute of Advanced Synthesis (IAS), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Kuan Xing
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Yu-Hao Huang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Kang-Ji Gan
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China.,Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Wei Gao
- Institute of Advanced Synthesis (IAS), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Huaimin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Xin Hong
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Hai-Hua Lu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China.,Institute of Advanced Synthesis (IAS), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.,Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
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11
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Zhang W, Chu J, Cyr AM, Yueh H, Brown LE, Wang TT, Pelletier J, Porco JA. Intercepted Retro-Nazarov Reaction: Syntheses of Amidino-Rocaglate Derivatives and Their Biological Evaluation as eIF4A Inhibitors. J Am Chem Soc 2019; 141:12891-12900. [PMID: 31310112 PMCID: PMC6693944 DOI: 10.1021/jacs.9b06446] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Rocaglates are a family of natural products isolated from the genus Aglaia which possess a highly substituted cyclopenta[b]benzofuran skeleton and inhibit cap-dependent protein synthesis. Rocaglates are attractive compounds due to their potential for inhibiting tumor cell maintenance in vivo by specifically targeting eukaryotic initiation factor 4A (eIF4A) and interfering with recruitment of ribosomes to mRNA. In this paper, we describe an intercepted retro-Nazarov reaction utilizing intramolecular tosyl migration to generate a reactive oxyallyl cation on the rocaglate skeleton. Trapping of the oxyallyl cation with a diverse range of nucleophiles has been used to generate over 50 novel amidino-rocaglate (ADR) and amino-rocaglate derivatives. Subsequently, these derivatives were evaluated for their ability to inhibit cap-dependent protein synthesis where they were found to outperform previous lead compounds including the rocaglate hydroxamate CR-1-31-B.
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Affiliation(s)
- Wenhan Zhang
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Jennifer Chu
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada, H3G 1Y6
| | - Andrew M. Cyr
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Han Yueh
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Lauren E. Brown
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Tony T. Wang
- Laboratory of Vector-borne Viral Diseases, Division of Viral Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20903, USA
| | - Jerry Pelletier
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada, H3G 1Y6
- Department of Oncology, McGill University, Montreal, Quebec, Canada, H3G 1Y6
- Rosalind & Morris Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada, H3G 1Y6
| | - John A. Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
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12
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Zhao JQ, Yang L, Zhou XJ, You Y, Wang ZH, Zhou MQ, Zhang XM, Xu XY, Yuan WC. Organocatalyzed Dearomative Cycloaddition of 2-Nitrobenzofurans and Isatin-Derived Morita–Baylis–Hillman Carbonates: Highly Stereoselective Construction of Cyclopenta[b]benzofuran Scaffolds. Org Lett 2019; 21:660-664. [DOI: 10.1021/acs.orglett.8b03786] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jian-Qiang Zhao
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Lei Yang
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Jian Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong You
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Zhen-Hua Wang
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Ming-Qiang Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Mei Zhang
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Xiao-Ying Xu
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wei-Cheng Yuan
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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13
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Affiliation(s)
- Meng Yao Zhang
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
| | - Lara R. Malins
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
| | - Jas S. Ward
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
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14
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Ateşin TA, Atesin AC, Rodriguez O, Rivera D, Garcia LY. Conformational analysis of a TADDOL-based phosphoramidite P,N ligand in a palladium(II) η3-π-allyl complex. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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15
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Congmon J, Tius MA. Contiguous Quaternary Centers from a Au
I
‐Catalyzed Nazarov Cyclization. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800604] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jonathan Congmon
- Chemistry Department University of Hawaii at Manoa 2545 The Mall 96822 Honolulu HI USA
| | - Marcus A. Tius
- Chemistry Department University of Hawaii at Manoa 2545 The Mall 96822 Honolulu HI USA
- University of Hawaii Cancer Center 701 Ilalo Street 96813 Honolulu HI USA
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16
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Mietke T, Cruchter T, Larionov VA, Faber T, Harms K, Meggers E. Asymmetric Nazarov Cyclizations Catalyzed by Chiral-at-Metal Complexes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701546] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Thomas Mietke
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Thomas Cruchter
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Vladimir A. Larionov
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
- Department of Inorganic Chemistry; Peoples' Friendship University of Russia (RUDN University); Miklukho-Maklaya St. 6 117198 Moscow Russian Federation
| | - Tabea Faber
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Klaus Harms
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Eric Meggers
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35043 Marburg Germany
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17
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Chen L, Liu B, Deng JJ, Zhang JS, Li W, Ahmed A, Yin S, Tang GH. Lindera cyclopentenedione intermediates from the roots of Lindera aggregata. RSC Adv 2018; 8:17898-17904. [PMID: 35542074 PMCID: PMC9080501 DOI: 10.1039/c8ra03094d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 05/03/2018] [Indexed: 12/23/2022] Open
Abstract
Chromatographic fractionation of the roots of Lindera aggregata has led to the isolation of three new monomers of Lindera cyclopentenedione derivatives (1–3), a pair of new enantiomers of bi-linderone derivatives (4a/4b), and six known Lindera cyclopentenediones (5–8 and 9a/9b). Their structures were determined by NMR and MS data. The absolute configurations of the new bi-linderone derivative enantiomers (4a/4b) were determined by ECD calculation. (±)-Lindepentone A (1) presents the novel skeleton of 3,5-dioxocyclopent-1-enecarboxylate. Lindoxepines A (2) and B (3) present an unprecedented oxepine-2,5-dione derivative skeleton, which may be enlightening for the in vivo biosynthesis of the monomers of Lindera cyclopentenediones. A possible biosynthetic pathway for 1 and a plausible biosynthetic pathway from stilbenes to Lindera cyclopentenediones via the key intermediates 2 and 3 were postulated. The inhibitory activity of these compounds against three microorganisms was also evaluated. Lindera cyclopentenediones together with their dimers and novel biosynthetic intermediates were isolated from Lindera aggregata.![]()
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Affiliation(s)
- Lin Chen
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Bo Liu
- The Second Clinical Medical College
- Guangzhou University of Chinese Medicine
- Guangzhou 510006
- China
| | - Jun-Jie Deng
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Jun-Sheng Zhang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Wei Li
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Abrar Ahmed
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Sheng Yin
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
| | - Gui-Hua Tang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- China
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18
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Paz BM, Li Y, Thøgersen MK, Jørgensen KA. Enantioselective synthesis of cyclopenta[ b]benzofurans via an organocatalytic intramolecular double cyclization. Chem Sci 2017; 8:8086-8093. [PMID: 29568457 PMCID: PMC5855134 DOI: 10.1039/c7sc03006a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 09/30/2017] [Indexed: 12/16/2022] Open
Abstract
An enantioselective organocatalytic strategy, combining Brønsted base and N-heterocyclic carbene catalysis in a unique manner, is demonstrated for a concise construction of the privileged cyclopenta[b]benzofuran scaffold, present in many bioactive compounds having both academic and commercial interests. The reaction concept relies on an intramolecular one-pot double cyclization involving a cycle-specific enantioselective Michael addition followed by a benzoin condensation of ortho-substituted cinnamaldehydes. Cyclopenta[b]benzofurans were achieved in moderate to good yields, with excellent stereoselectivities. A proof of principle for a diastereodivergent variation is demonstrated through the synthesis of cyclopenta[b]benzofurans containing two contiguous aromatic substituents in a substitution pattern present in commercial and natural compounds. Furthermore, several transformations have been performed, demonstrating the synthetic utility of the products. Finally, insights into the activation mode and stereoindution models are presented for this new synthetic strategy.
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Affiliation(s)
- Bruno Matos Paz
- Department of Chemistry , Aarhus University , DK-8000 Aarhus C , Denmark .
| | - Yang Li
- Department of Chemistry , Aarhus University , DK-8000 Aarhus C , Denmark .
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19
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Jolit A, Dickinson CF, Kitamura K, Walleser PM, Yap GPA, Tius MA. Catalytic Enantioselective Nazarov Cyclization. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701117] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anais Jolit
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall 96822 Honolulu HI USA
| | - Cody F. Dickinson
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall 96822 Honolulu HI USA
| | - Kei Kitamura
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall 96822 Honolulu HI USA
| | - Patrick M. Walleser
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall 96822 Honolulu HI USA
| | - Glenn P. A. Yap
- Department of Chemistry and Biochemistry; University of Delaware; 236 Brown Laboratory 19716 Newark DE USA
| | - Marcus A. Tius
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall 96822 Honolulu HI USA
- University of Hawaii Cancer Center; 701 Ilalo Street 96813 Honolulu HI USA
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20
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Ateşin TA, Martinez GM, Flores D. It Is Not Just Up to the Substrate: Palladium(0) Cyclizes Nazarov Substrates through Intramolecular Allylic Alkylation. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00494] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tülay A. Ateşin
- Department of Chemistry, The University of Texas Rio Grande Valley, Edinburg, Texas 78539-2999, United States
| | - Gabriela M. Martinez
- Department of Chemistry, The University of Texas Rio Grande Valley, Edinburg, Texas 78539-2999, United States
| | - David Flores
- Department of Chemistry, The University of Texas Rio Grande Valley, Edinburg, Texas 78539-2999, United States
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21
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Zhou X, Zhao Y, Cao Y, He L. Catalytic Efficient Nazarov Reaction of Unactivated Aryl Vinyl Ketones via a Bidentate Diiron Lewis Acid Activation Strategy. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700820] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xin Zhou
- School of Chemsitry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Yukun Zhao
- School of Chemsitry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Yang Cao
- School of Chemsitry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Lirong He
- School of Chemsitry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
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22
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Wang GP, Chen MQ, Zhu SF, Zhou QL. Enantioselective Nazarov cyclization of indole enones cooperatively catalyzed by Lewis acids and chiral Brønsted acids. Chem Sci 2017; 8:7197-7202. [PMID: 29081952 PMCID: PMC5633839 DOI: 10.1039/c7sc03183a] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 08/25/2017] [Indexed: 11/21/2022] Open
Abstract
Enantioselective control of the chirality of a tertiary α-carbon in the products of a Nazarov cyclization of enones is challenging because the reaction involves an enantioselective proton transfer process. We herein report the use of cooperative catalysis using Lewis acids and chiral Brønsted acids to control the stereochemistry of the tertiary α-carbon in the products of this reaction. Specifically, with ZnCl2 and a chiral spiro phosphoric acid as catalysts, we realized the first enantioselective construction of cyclopenta[b]indoles with chiral tertiary α-carbons via Nazarov cyclization of indole enone substrates with only one coordinating site. Mechanistic studies revealed that the chiral spiro phosphoric acid acts as a multifunctional catalyst: it co-catalyzes the cyclization of the dienone and enantioselectively catalyzes a proton transfer reaction of the enol intermediate. This new strategy of enantioselective control by means of cooperative catalysis may show utility for other challenging asymmetric cyclization reactions.
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Affiliation(s)
- Guo-Peng Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry Nankai University , Tianjin 300071 , China . ;
| | - Meng-Qing Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry Nankai University , Tianjin 300071 , China . ;
| | - Shou-Fei Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry Nankai University , Tianjin 300071 , China . ;
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry Nankai University , Tianjin 300071 , China . ; .,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China
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23
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Komatsuki K, Sadamitsu Y, Sekine K, Saito K, Yamada T. Stereospecific Decarboxylative Nazarov Cyclization Mediated by Carbon Dioxide for the Preparation of Highly Substituted 2-Cyclopentenones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705909] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Keiichi Komatsuki
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Yuta Sadamitsu
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Kohei Sekine
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Kodai Saito
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Tohru Yamada
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
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24
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Komatsuki K, Sadamitsu Y, Sekine K, Saito K, Yamada T. Stereospecific Decarboxylative Nazarov Cyclization Mediated by Carbon Dioxide for the Preparation of Highly Substituted 2-Cyclopentenones. Angew Chem Int Ed Engl 2017; 56:11594-11598. [DOI: 10.1002/anie.201705909] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Keiichi Komatsuki
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Yuta Sadamitsu
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Kohei Sekine
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Kodai Saito
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Tohru Yamada
- Department of Chemistry; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
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25
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Gavrilov KN, Maksimova MG, Chuchelkin IV, Lugovsky VV, Zheglov SV, Gavrilov VK, Perepukhov AM. Chiral phosphite-type ligands based on ((4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-diyl)bis(diphenylmethanol) ((R,R)-TADDOL) with peripheral arylamino groups. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1883-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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27
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Álvarez-Calero JM, Jorge ZD, Massanet GM. TiCl4/Et3N-Mediated Condensation of Acetate and Formate Esters: Direct Access to β-Alkoxy- and β-Aryloxyacrylates. Org Lett 2016; 18:6344-6347. [DOI: 10.1021/acs.orglett.6b03233] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José María Álvarez-Calero
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Zacarías D. Jorge
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Guillermo M. Massanet
- Departamento de Química
Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
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28
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Gavrilov KN, Zheglov SV, Novikov IM, Lugovsky VV, Zimarev VS, Mikhel IS. Diamidophosphite–oxazolines with a pyridine core in Pd-catalyzed asymmetric reactions. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Zhou Z, Dixon DD, Jolit A, Tius MA. The Evolution of the Total Synthesis of Rocaglamide. Chemistry 2016; 22:15929-15936. [DOI: 10.1002/chem.201603312] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Zhe Zhou
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall Honolulu HI 96822 USA
| | - Darryl D. Dixon
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall Honolulu HI 96822 USA
| | - Anais Jolit
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall Honolulu HI 96822 USA
| | - Marcus A. Tius
- Chemistry Department; University of Hawaii at Manoa; 2545 The Mall Honolulu HI 96822 USA
- University of Hawaii; Cancer Center; 701 Ilalo Street Honolulu HI 96813 USA
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30
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Tang ML, Peng P, Liu ZY, Zhang J, Yu JM, Sun X. Sulfoxide-Based Enantioselective Nazarov Cyclization: Divergent Syntheses of (+)-Isopaucifloral F, (+)-Quadrangularin A, and (+)-Pallidol. Chemistry 2016; 22:14535-9. [DOI: 10.1002/chem.201603664] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Mei-Lin Tang
- Department of Natural Products Chemistry; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 P.R. China
| | - Peng Peng
- Department of Natural Products Chemistry; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 P.R. China
| | - Zheng-Yu Liu
- Department of Natural Products Chemistry; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 P.R. China
| | - Jian Zhang
- Department of Natural Products Chemistry; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 P.R. China
| | - Jian-Ming Yu
- Department of Natural Products Chemistry; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 P.R. China
| | - Xun Sun
- Department of Natural Products Chemistry; School of Pharmacy; Fudan University; 826 Zhangheng Road Shanghai 201203 P.R. China
- Shanghai Key Laboratory of Clinical Geriatric Medicine; Shanghai 201203 P.R. China
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31
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Zhao Q, Abou-Hamdan H, Désaubry L. Recent Advances in the Synthesis of Flavaglines, a Family of Potent Bioactive Natural Compounds Originating from Traditional Chinese Medicine. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600437] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Qian Zhao
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
| | - Hussein Abou-Hamdan
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
| | - Laurent Désaubry
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
- Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry; College of Biotechnology; Tianjin University of Science and Technology; 300457 Tianjin P. R. China
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32
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Itoh T, Nokami T, Kawatsura M. Recent Progress on Nazarov Cyclizations: The Use of Iron Salts as Catalysts in Ionic Liquid Solvent Systems. CHEM REC 2016; 16:1676-89. [PMID: 27219324 DOI: 10.1002/tcr.201600021] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Indexed: 12/21/2022]
Abstract
Nazarov cyclization is an important and versatile method for the synthesis of five-membered carbocycles, and extensive studies have been conducted to optimize the reaction. Among recent studies, several trends are recognized. One is the combination of different reactions with Nazarov cyclization in a one-pot reaction system which enables the preparation of unique cyclization products. The second is the use of a transition-metal catalyst, though Lewis or Brønsted acids have generally been used for the reaction. The third is the realization of the asymmetric Nazarov cyclization. The fourth is the base-catalyzed Nazarov cyclization. Furthermore, several useful protocols for realizing Nazarov cyclization have also been developed. The recent progress on Nazarov cyclizations is summarized in Section 2. Section 3 is our chronicle in this field. We focused on the use of iron as the catalyst in Nazarov cyclizations and ionic liquids as solvents: Nazarov cyclization of thiophene derivatives using FeCl3 as the catalyst was accomplished and we succeeded in demonstrating the first example of an iron-catalyzed asymmetric Nazarov reaction. We next established Nazarov cyclization of pyrrole or indole derivatives using Fe(ClO4 )3 ·Al2 O3 as the catalyst with high trans selectivities in excellent yields. Since the cyclized product was reacted with a vinyl ketone in the presence of the same iron salt, the system allowed realization of the sequential type of Nazarov/Michael reaction of pyrrole derivatives. Furthermore, we demonstrated the recyclable use of the iron catalyst and obtained the desired Nazarov/Michael reaction products in good yields for five repetitions of the reactions without any addition of the catalyst using an ionic liquid, [bmim][NTf2 ], as the solvent. We expect that the iron-catalyzed Nazarov cyclization, in particular, in an ionic liquid solvent might become a useful method to synthesize functional molecules that include cycloalkene moieties.
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Affiliation(s)
- Toshiyuki Itoh
- Department of Chemistry and Biotechnology, Graduate School of Engineering and Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori, 680-852, Japan
| | - Toshiki Nokami
- Department of Chemistry and Biotechnology, Graduate School of Engineering and Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori, 680-852, Japan
| | - Motoi Kawatsura
- Department of Chemistry, College of Humanities and Science, Nihon University, 3-25-40 Sakurajosui, Setagaya-ku, Tokyo, 156-8550, Japan
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33
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Total synthesis of a biotinylated rocaglate: Selective targeting of the translation factors eIF4AI/II. Bioorg Med Chem Lett 2015; 26:262-264. [PMID: 26718843 DOI: 10.1016/j.bmcl.2015.12.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 10/26/2015] [Accepted: 12/12/2015] [Indexed: 01/09/2023]
Abstract
The total synthesis of a biotinylated derivative of methyl rocaglate is described. This compound was accessed from synthetic methyl rocaglate (2) via formation of the propargyl amide and subsequent click reaction with a biotin azide. Affinity purification revealed that biotinylated rocaglate (8) and methyl rocaglate (2) bind with high specificity to translation factors eIF4AI/II. This remarkable selectivity is in line with that found for the more complex rocaglate silvestrol (3).
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35
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Takeda T, Harada S, Nishida A. Catalytic Asymmetric Nazarov Cyclization of Heteroaryl Vinyl Ketones through a Crystallographically Defined Chiral Dinuclear Nickel Complex. Org Lett 2015; 17:5184-7. [DOI: 10.1021/acs.orglett.5b02497] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Takuya Takeda
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shinji Harada
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
- Molecular
Chirality Research Center, Chiba University, 1-33 Yayoi-cho,
Inage-ku, Chiba 263-8522, Japan
| | - Atsushi Nishida
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
- Molecular
Chirality Research Center, Chiba University, 1-33 Yayoi-cho,
Inage-ku, Chiba 263-8522, Japan
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