1
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Zhang P, Liu H, Xu S, He Y, He X, Sun B, Hu J. Direct Construction of 1,4-Dihydropyridazines and Pyrazoles via Annulation of Alkyl 2-Aroyl-1-chlorocyclopropanecarboxylates. J Org Chem 2024. [PMID: 38822472 DOI: 10.1021/acs.joc.4c00520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
An efficient and chemodivergent synthesis of highly functionalized 1,4-dihydropyridazines and pyrazoles has been accomplished via base-promoted annulation between hydrazones and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates, respectively. This transition-metal-free domino reaction proceeded rapidly under mild basic conditions, affording potentially bioactive 1,4-dihydropyridazine and pyrazole derivatives in moderate yields. The conversion of 1,4-dihydropyridazine to pyrazole was confirmed by adjusting the quantity of the base.
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Affiliation(s)
- Pengwei Zhang
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Huili Liu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Shuo Xu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Yiqun He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Xinhao He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Bing Sun
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Junhao Hu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
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2
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Wang J, Shang Y, Zhao X, Cui Z, Li Y, Wang KH, Huang D, Hu Y, Wang N, Feng L. The cyclization/rearrangement of α-hydroxy ketones with trifluoromethyl N-acylhydrazones to synthesize multi-substituted trifluoromethyloxazolines. Chem Commun (Camb) 2023; 59:14293-14296. [PMID: 37964766 DOI: 10.1039/d3cc03854h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
A highly efficient and metal-free [3+2] cyclization/rearrangement reaction toward the synthesis of multisubstituted trifluoromethyloxazolines from α-hydroxyketones and trifluoromethyl N-acylhydrazones has been developed. The unprecedented rearrangement of the amide fragment under acidic conditions after cleavage of the N-N bond of acylhydrazones has opened up new avenues for the development of reactions involving trifluoromethyl N-acylhydrazones. DFT calculations show that the mechanism involves multiple proton transfer processes.
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Affiliation(s)
- Junjiao Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Yongwei Shang
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Xiujuan Zhao
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Zhenli Cui
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Yang Li
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Yulai Hu
- College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou, P. R. China.
| | - Na Wang
- Gansu Computation Center, Lanzhou 730000, P. R. China
| | - Lei Feng
- Gansu Computation Center, Lanzhou 730000, P. R. China
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3
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Dongxu Z. Trifluoromethylated hydrazones and acylhydrazones as potent nitrogen-containing fluorinated building blocks. Beilstein J Org Chem 2023; 19:1741-1754. [PMID: 38025086 PMCID: PMC10667715 DOI: 10.3762/bjoc.19.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 11/03/2023] [Indexed: 12/01/2023] Open
Abstract
Nitrogen-containing organofluorine derivatives, which are prepared using fluorinated building blocks, are among the most important active fragments in various pharmaceutical and agrochemical products. This review focuses on the reactivity, synthesis, and applications of fluoromethylated hydrazones and acylhydrazones. It summarizes recent methodologies that have been used for the synthesis of various nitrogen-containing organofluorine compounds.
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Affiliation(s)
- Zhang Dongxu
- Department of Fire Protection Engineering, China Fire and Rescue Institute, Beijing 102202, P. R. of China
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4
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Ričko S, Bitsch RS, Kaasik M, Otevřel J, Højgaard Madsen M, Keimer A, Jørgensen KA. Enantioconvergent 6π Electrocyclization Enabled by Photoredox Racemization. J Am Chem Soc 2023; 145:20913-20926. [PMID: 37753541 DOI: 10.1021/jacs.3c06227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
This study presents a novel photoredox-enabled enantioconvergent catalytic strategy used to construct chiral 2H-1,3-benzoxazines via an unprecedented oxa-6π electrocyclization utilizing racemic α-substituted glycinates as substrates. The approach leverages a cobalt-based chiral Lewis acid catalyst, which promotes the transformation under thermal or photoredox conditions. While the thermal reaction selectively converts only the (S)-configured glycinates into enantioenriched 2H-1,3-benzoxazines (up to 96:4 e.r.), the addition of 0.5 mol % of a commercially available iridium photocatalyst under visible light irradiation transforms the reaction into an enantioconvergent process. Detailed mechanistic and time course studies of optically pure α-deuterated substrates revealed the presence of an enantiospecific kinetic isotope effect, which helped to clarify the role of both the photo- and chiral Lewis acid catalyst in the reaction sequence. In this dual catalytic system, the photocatalyst promotes a dynamic interconversion between the substrate enantiomers─a process not accessible via ground-state chemistry─while the chiral Lewis acid selectively transforms only the (S)-configured substrates. Further mechanistic evidence for the proposed mechanism is provided by linear free energy relationship analysis, which suggests that the stereodetermining step involves a 6π electrocyclization under both thermal and photoredox conditions.
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Affiliation(s)
- Sebastijan Ričko
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
- Aarhus Institute of Advanced Studies, Aarhus University, DK-8000 Aarhus C, Denmark
| | - René Slot Bitsch
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Mikk Kaasik
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Jan Otevřel
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | | | - Anna Keimer
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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5
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Fang Z, Teng Y, Yang H, Li R, Li Q, You Y, Weng Z. Synthesis of 4-trifluoromethyl pyridazines via annulation of pyridinium ylides with trifluoroacetyl diazoester. Org Biomol Chem 2022; 20:3564-3569. [PMID: 35420110 DOI: 10.1039/d2ob00483f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A base promoted annulation of pyridinium ylides with trifluoroacetyl diazoester has been reported. Highly functionalized 4-trifluoromethyl pyridazines were synthesized in good yields without the use of any heavy metal catalysts. The developed methodology was compatible with a variety of important functional groups. Mechanistic studies revealed that trifluoroacetylated hydrazone was an active intermediate of this three-component annulation. Synthetic versatility of the method via aminolysis and condensation toward amide- and pyridazino[4,5-c]pyridazine-derivatives has been showcased.
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Affiliation(s)
- Zheng Fang
- Key Laboratory of Molecule Synthesis and Function Discovery, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou 350108, China.
| | - Yun Teng
- Key Laboratory of Molecule Synthesis and Function Discovery, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou 350108, China.
| | - Huilin Yang
- Fujian Engineering Research Center of New Chinese Lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou, 350108, China.
| | - Rongxing Li
- Fujian Engineering Research Center of New Chinese Lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou, 350108, China.
| | - Qiuhong Li
- Fujian Engineering Research Center of New Chinese Lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou, 350108, China.
| | - Yi You
- Key Laboratory of Molecule Synthesis and Function Discovery, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou 350108, China.
| | - Zhiqiang Weng
- Key Laboratory of Molecule Synthesis and Function Discovery, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou 350108, China. .,Fujian Engineering Research Center of New Chinese Lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou, 350108, China.
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6
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Wu X, Sparr C. Stereoselective Synthesis of Atropisomeric Acridinium Salts by the Catalyst‐Controlled Cyclization of
ortho
‐Quinone Methide Iminiums. Angew Chem Int Ed Engl 2022; 61:e202201424. [PMID: 35167176 PMCID: PMC9306694 DOI: 10.1002/anie.202201424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Indexed: 11/07/2022]
Abstract
Quinone methides are fundamental intermediates for a wide range of reactions in which catalyst stereocontrol is often achieved by hydrogen bonding. Herein, we describe the feasibility of an intramolecular Friedel–Crafts 6π electrocyclization through ortho‐quinone methide iminiums stereocontrolled by a contact ion pair. A disulfonimide catalyst activates racemic trichloroacetimidate substrates and imparts stereocontrol in the cyclization step, providing a new avenue for selective ortho‐quinone methide iminium functionalization. A highly stereospecific oxidation readily transforms the enantioenriched acridanes into rotationally restricted acridiniums. Upon ion exchange, the method selectively affords atropisomeric acridinium tetrafluoroborate salts in high yields and an enantioenrichment of up to 93 : 7 e.r. We envision that ion‐pairing catalysis over ortho‐quinone methide iminiums enables the selective synthesis of a diversity of heterocycles and aniline derivatives with distinct stereogenic units.
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Affiliation(s)
- Xingxing Wu
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
- NCCR Molecular Systems Engineering, BPR 1095Mattenstrasse 24a4058BaselSwitzerland
| | - Christof Sparr
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
- NCCR Molecular Systems Engineering, BPR 1095Mattenstrasse 24a4058BaselSwitzerland
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7
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Zou N, Liu Z, Yan G, Wang Y, Liang C, Mo D. DBU‐Promoted 6π‐Azaelectrocyclization and Hydrogen‐Migration to Prepare 6‐Alkyl Pyridine
N
‐Oxides from
N
‐Vinyl‐
α
,
β
‐Unsaturated Nitrones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200066] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ning Zou
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Zhang‐Wei Liu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Gong‐Gui Yan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Ying‐Chun Wang
- College of Chemistry and Chemical Engineering Jishou University Jishou 416000, People's Republic of China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
| | - Dong‐Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004, People's Republic of China
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8
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Wu X, Sparr C. Stereoselective Synthesis of Atropisomeric Acridinium Salts by the Catalyst‐Controlled Cyclization of
ortho
‐Quinone Methide Iminiums. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xingxing Wu
- Department of Chemistry University of Basel St. Johanns-Ring 19 4056 Basel Switzerland
- NCCR Molecular Systems Engineering, BPR 1095 Mattenstrasse 24a 4058 Basel Switzerland
| | - Christof Sparr
- Department of Chemistry University of Basel St. Johanns-Ring 19 4056 Basel Switzerland
- NCCR Molecular Systems Engineering, BPR 1095 Mattenstrasse 24a 4058 Basel Switzerland
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9
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Polychronidou V, Krupp A, Strohmann C, Antonchick AP. Cascade aza-Wittig/6π-Electrocyclization in the Synthesis of 1,6-Dihydropyridines. Org Lett 2021; 23:6024-6029. [PMID: 34291925 PMCID: PMC8397428 DOI: 10.1021/acs.orglett.1c02099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A metal-free protocol
for the synthesis of substituted 1,6-dihydropyridines
with quaternary stereogenic centers via a cascade aza-Wittig/6π-electrocyclization
process has been developed. The high functional group compatibility
and broad scope of this method were demonstrated by using a wide range
of easily available vinyliminophosphoranes and ketones, with
yields up to 97%. A modification of the obtained products allowed
for an increase in complexity and chemical diversity. Finally, attempts
for asymmetric synthesis of 1,6-dihydropyridines are demonstrated.
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Affiliation(s)
- Vasiliki Polychronidou
- Max-Planck-Institut für Molekulare Physiologie, Abteilung Chemische Biologie, Otto-Hahn-Straße 11, 44227 Dortmund, Germany.,Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn- Straße 6, 44227 Dortmund, Germany
| | - Anna Krupp
- Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn- Straße 6, 44227 Dortmund, Germany
| | - Carsten Strohmann
- Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn- Straße 6, 44227 Dortmund, Germany
| | - Andrey P Antonchick
- Max-Planck-Institut für Molekulare Physiologie, Abteilung Chemische Biologie, Otto-Hahn-Straße 11, 44227 Dortmund, Germany.,Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn- Straße 6, 44227 Dortmund, Germany.,Nottingham Trent University, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, United Kingdom
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10
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Mondal B, Maiti R, Yang X, Xu J, Tian W, Yan JL, Li X, Chi YR. Carbene-catalyzed enantioselective annulation of dinucleophilic hydrazones and bromoenals for access to aryl-dihydropyridazinones and related drugs. Chem Sci 2021; 12:8778-8783. [PMID: 34257877 PMCID: PMC8246082 DOI: 10.1039/d1sc01891d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/17/2021] [Indexed: 11/28/2022] Open
Abstract
4,5-Dihydropyridazinones bearing an aryl substituent at the C6-position are important motifs in drug molecules. Herein, we developed an efficient protocol to access aryl-dihydropyridazinone molecules via carbene-catalyzed asymmetric annulation between dinucleophilic arylidene hydrazones and bromoenals. Key steps in this reaction include polarity-inversion of aryl aldehyde-derived hydrazones followed by chemo-selective reaction with enal-derived α,β-unsaturated acyl azolium intermediates. The aryl-dihydropyridazinone products accessed by our protocol can be readily transformed into drugs and bioactive molecules. Polarity inversion of arylidene hydrazones to react with bromoenals via carbene organic catalysis is disclosed. The reaction enantioselectively affords 6-aryl-4,5-dihydropyridazinones and related drugs with proven commercial applications.![]()
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Affiliation(s)
- Bivas Mondal
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Rakesh Maiti
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Xing Yang
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China .,Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Weiyi Tian
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Jia-Lei Yan
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Xiangyang Li
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China .,Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
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11
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Matador E, Iglesias-Sigüenza J, Monge D, Merino P, Fernández R, Lassaletta JM. Enantio- and Diastereoselective Nucleophilic Addition of N-tert-Butylhydrazones to Isoquinolinium Ions through Anion-Binding Catalysis. Angew Chem Int Ed Engl 2021; 60:5096-5101. [PMID: 33045143 DOI: 10.1002/anie.202012861] [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: 09/22/2020] [Indexed: 12/13/2022]
Abstract
A highly enantio- and diastereoselective thiourea-catalyzed dearomatization of isoquinolines employing N-tert-butylhydrazones as neutral α-azo carbanions and masked acyl anion equivalents has been developed. Experimental and computational data supports the generation of highly ordered complexes wherein the chloride behaves as a template for the catalyst, the hydrazone reagent, and the isoquinolinium cation, providing excellent stereocontrol in the formation of two contiguous stereogenic centers. The ensuing selective and high-yielding transformations provide appealing dihydroisoquinoline derivatives.
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Affiliation(s)
- Esteban Matador
- Departamento de Química Orgánica, Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/ Prof. García González 1, 41012, Sevilla, Spain
| | - Javier Iglesias-Sigüenza
- Departamento de Química Orgánica, Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/ Prof. García González 1, 41012, Sevilla, Spain
| | - David Monge
- Departamento de Química Orgánica, Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/ Prof. García González 1, 41012, Sevilla, Spain
| | - Pedro Merino
- Instituto de BiocomputaciónyFísica de Sistemas Complejos (BIFI), Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
| | - Rosario Fernández
- Departamento de Química Orgánica, Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/ Prof. García González 1, 41012, Sevilla, Spain
| | - José M Lassaletta
- Instituto de Investigaciones Químicas (CSIC-US) and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/ Américo Vespucio 49, 41092, Sevilla, Spain
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12
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He H, Xu N, Zhang H, Chen B, Hu Z, Guo K, Chun J, Cao S, Zhu Y. Brønsted acid-promoted hydroamination of unsaturated hydrazones: access to biologically important 5-arylpyrazolines. RSC Adv 2021; 11:17340-17345. [PMID: 35479684 PMCID: PMC9033072 DOI: 10.1039/d1ra03043d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 04/29/2021] [Indexed: 12/25/2022] Open
Abstract
A novel and efficient Brønsted acid-promoted hydroamination of hydrazone-tethered olefins has been developed. A variety of pyrazolines have been easily obtained in good to excellent yields with high chemo- and regioselectivity under simple and mild conditions. This method represents a straightforward, facile, and practical approach toward biologically important 5-arylpyrazolines, which are difficult to access by previously reported radical hydroamination of β,γ-unsaturated hydrazones. An efficient, chemo- and regioselective Brønsted acid-promoted hydroamination reaction of hydrazone-tethered olefins towards 5-arylpyrazolines was developed.![]()
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Affiliation(s)
- Han He
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Ning Xu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Honglin Zhang
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Bin Chen
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Zhengnan Hu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Kang Guo
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Jianlin Chun
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Shujun Cao
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Yingguang Zhu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
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13
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Matador E, Iglesias‐Sigüenza J, Monge D, Merino P, Fernández R, Lassaletta JM. Enantio‐ and Diastereoselective Nucleophilic Addition of
N
‐
tert
‐Butylhydrazones to Isoquinolinium Ions through Anion‐Binding Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012861] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Esteban Matador
- Departamento de Química Orgánica Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - Javier Iglesias‐Sigüenza
- Departamento de Química Orgánica Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - David Monge
- Departamento de Química Orgánica Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - Pedro Merino
- Instituto de BiocomputaciónyFísica de Sistemas Complejos (BIFI) Universidad de Zaragoza-CSIC 50009 Zaragoza Spain
| | - Rosario Fernández
- Departamento de Química Orgánica Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - José M. Lassaletta
- Instituto de Investigaciones Químicas (CSIC-US) and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Américo Vespucio 49 41092 Sevilla Spain
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14
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Yang T, Deng Z, Wang KH, Li P, Huang D, Su Y, Hu Y. Synthesis of CF 3-Substituted 1,6-Dihydropyridazines by Copper-Promoted Cascade Oxidation/Cyclization of Trifluoromethylated Homoallylic N-Acylhydrazines. J Org Chem 2020; 85:12304-12314. [DOI: 10.1021/acs.joc.0c01568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Tianyu Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Zhoubin Deng
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Pengfei Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yingpeng Su
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yulai Hu
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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15
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Feng J, He T, Xie Y, Yu Y, Baell JB, Huang F. I 2-Promoted [4 + 2] cycloaddition of in situ generated azoalkenes with enaminones: facile and efficient synthesis of 1,4-dihydropyridazines and pyridazines. Org Biomol Chem 2020; 18:9483-9493. [PMID: 33179698 DOI: 10.1039/d0ob01958e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and efficient strategy for the synthesis of 1,4-dihydropyridazines and pyridazines through I2-promoted [4 + 2] cycloaddition of in situ generated azoalkenes with enaminones has been developed. The switch in selectivity is attributed to the judicious choice of different reaction temperatures. The key features of this work include controllable and selective synthesis, good functional group tolerance, good to excellent reaction yields, metal/base-free conditions, and also applicability to one-pot methodology.
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Affiliation(s)
- Jiajun Feng
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Tiantong He
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Yuxing Xie
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China. and Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China. and School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
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16
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Wu W, Han X, Weng Z. Synthesis of pertrifluoromethyl pyridazine derivatives via a tandem reaction of aryldiazonium salts with hexafluoroacetylacetone. Org Chem Front 2020. [DOI: 10.1039/d0qo00955e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A method for the synthesis of pertrifluoromethyl pyridazine derivatives by the condensation of arenediazonium salts with hexafluoroacetylacetone has been developed.
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Affiliation(s)
- Wei Wu
- Key Laboratory of Molecule Synthesis and Function Discovery
- and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Xiaoyan Han
- Testing and Analysis Center
- Soochow University
- Suzhou 215123
- China
| | - Zhiqiang Weng
- Key Laboratory of Molecule Synthesis and Function Discovery
- and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials
- College of Chemistry
- Fuzhou University
- Fuzhou
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17
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Zhu X, Wang Z, Hou B, Zhang H, Deng C, Ye L. Zinc‐Catalyzed Asymmetric Formal [4+3] Annulation of Isoxazoles with Enynol Ethers by 6π Electrocyclization: Stereoselective Access to 2
H
‐Azepines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912534] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xin‐Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Ze‐Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Bo‐Shang Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Hao‐Wen Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 China
| | - Long‐Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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18
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Zhu XQ, Wang ZS, Hou BS, Zhang HW, Deng C, Ye LW. Zinc-Catalyzed Asymmetric Formal [4+3] Annulation of Isoxazoles with Enynol Ethers by 6π Electrocyclization: Stereoselective Access to 2H-Azepines. Angew Chem Int Ed Engl 2019; 59:1666-1673. [PMID: 31724314 DOI: 10.1002/anie.201912534] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/31/2019] [Indexed: 12/17/2022]
Abstract
6π electrocyclization has attracted interest in organic synthesis because of its high stereospecificity and atom economy in the construction of versatile 5-7-membered cycles. However, examples of asymmetric 6π electrocyclization are quite scarce, and have to rely on the use of chiral organocatalysts, and been limited to pentadienyl-anion- and triene-type 6π electrocyclizations. Described herein is a zinc-catalyzed formal [4+3] annulation of isoxazoles with 3-en-1-ynol ethers via 6π electrocyclization, leading to the site-selective synthesis of functionalized 2H-azepines and 4H-azepines in good to excellent yields with broad substrate scope. Moreover, this strategy has also been used to produce chiral 2H-azepines with high enantioselectivities (up to 97:3 e.r.). This protocol not only is the first asymmetric heptatrienyl-cation-type 6π electrocyclization, but also is the first asymmetric reaction of isoxazoles with alkynes and the first asymmetric catalysis based on ynol ethers.
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Affiliation(s)
- Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Ze-Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Bo-Shang Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hao-Wen Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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19
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Yuan M, Mbaezue II, Zhou Z, Topic F, Tsantrizos YS. P-Chiral, N-phosphoryl sulfonamide Brønsted acids with an intramolecular hydrogen bond interaction that modulates organocatalysis. Org Biomol Chem 2019; 17:8690-8694. [PMID: 31535120 DOI: 10.1039/c9ob01774g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Brønsted acids exemplified by OttoPhosa I (5c) were designed and evaluated in the asymmetric transfer hydrogenation of quinolines. Their catalytic properties are modulated by an intramolecular hydrogen bond that rigidifies their catalytic cavity, accelerates the reaction rate and improves enantioselectivity.
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Affiliation(s)
- Minglei Yuan
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8.
| | - Ifenna I Mbaezue
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8.
| | - Zhi Zhou
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8.
| | - Filip Topic
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8.
| | - Youla S Tsantrizos
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8.
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20
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Chen HX, Li Y, He X, Zhang Y, He W, Liang H, Zhang Y, Jiang X, Chen X, Cao R, Liu GF, Qiu L. Unexpected Brønsted Acid-Catalyzed Domino Reaction of 3-Hydroxyisoindolin-1-ones and N
-tert
-Butyl Hydrazones for the Synthesis of 3-(Hydrazono)isoindolin-1-ones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801293] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Hui-Xuan Chen
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Yongsu Li
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Xuefeng He
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Yaqi Zhang
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Wenhuan He
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Hao Liang
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Yuyang Zhang
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Xiaoding Jiang
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Xiangmeng Chen
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Rihui Cao
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Gao-Feng Liu
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
| | - Liqin Qiu
- School of Chemistry; The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center; Guangdong Engineering Research Center of Chiral Drugs; Sun Yat-Sen University; Guangzhou People's Republic of China
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21
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Komendantova AS, Fakhrutdinov AN, Menchikov LG, Sukhorukov AY, Zavarzin IV, Volkova YA. Cyclization of β-Chlorovinyl Thiohydrazones into Pyridazines: A Mechanistic Study. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anna S. Komendantova
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky prosp. 119991 Moscow Russia
| | - Artem N. Fakhrutdinov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky prosp. 119991 Moscow Russia
| | - Leonid G. Menchikov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky prosp. 119991 Moscow Russia
| | - Alexey Yu. Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky prosp. 119991 Moscow Russia
| | - Igor V. Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky prosp. 119991 Moscow Russia
| | - Yulia A. Volkova
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky prosp. 119991 Moscow Russia
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22
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Guo YQ, Zhao MN, Ren ZH, Guan ZH. Copper-Promoted 6- endo-trig Cyclization of β,γ-Unsaturated Hydrazones for the Synthesis of 1,6-Dihydropyridazines. Org Lett 2018; 20:3337-3340. [PMID: 29790767 DOI: 10.1021/acs.orglett.8b01240] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel and efficient strategy for the synthesis of 1,6-dihydropyridazines via copper-promoted 6- endo-trig cyclization of readily available β,γ-unsaturated hydrazones have been developed. A series of 1,6-dihydropyridazines have been synthesized by this method with good yields, high functional group tolerance, and remarkable regioselectivity under mild conditions. Importantly, the 1,6-dihydropyridazines can be efficiently converted to biologically important pyridazines in the presence of NaOH.
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Affiliation(s)
- Yong-Qiang Guo
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P. R. China
| | - Mi-Na Zhao
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P. R. China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P. R. China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , P. R. China
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23
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Jia S, El Kaim L. Mannich reaction of trifluoroacetaldehyde hydrazones: a useful entry to trifluoromethyl substituted heterocycles. Org Biomol Chem 2018; 16:1457-1460. [DOI: 10.1039/c7ob02840g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N–N bond formation in Ugi processes: from nitric acid to the libraries of nitramines.
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Affiliation(s)
- Shuanglong Jia
- Laboratoire de Synthèse Organique
- CNRS
- Ecole Polytechnique
- ENSTA ParisTech
- UMR 7652
| | - Laurent El Kaim
- Laboratoire de Synthèse Organique
- CNRS
- Ecole Polytechnique
- ENSTA ParisTech
- UMR 7652
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24
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Zhu C, Zhu R, Zeng H, Chen F, Liu C, Wu W, Jiang H. Copper-Catalyzed C(sp3)−H/C(sp3)−H Cross-Dehydrogenative Coupling with Internal Oxidants: Synthesis of 2-Trifluoromethyl-Substituted Dihydropyrrol-2-ols. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707719] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
- State Key Laboratory of Pulp and Paper Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Rui Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Hao Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
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25
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Zhu C, Zhu R, Zeng H, Chen F, Liu C, Wu W, Jiang H. Copper-Catalyzed C(sp3)−H/C(sp3)−H Cross-Dehydrogenative Coupling with Internal Oxidants: Synthesis of 2-Trifluoromethyl-Substituted Dihydropyrrol-2-ols. Angew Chem Int Ed Engl 2017; 56:13324-13328. [DOI: 10.1002/anie.201707719] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
- State Key Laboratory of Pulp and Paper Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Rui Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Hao Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
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26
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Shabalin DA, Dvorko MY, Zolotareva EE, Ushakov IA, Vashchenko AV, Schmidt EY, Trofimov BA. Metal-Free Selective Synthesis of 1,4-Dihydropyridazines from Hydroxypyrrolines and Hydrazines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700589] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dmitrii A. Shabalin
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Marina Yu. Dvorko
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Evgeniya E. Zolotareva
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Igor' A. Ushakov
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Alexander V. Vashchenko
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Elena Yu. Schmidt
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Boris A. Trofimov
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
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27
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Parmar D, Sugiono E, Raja S, Rueping M. Addition and Correction to Complete Field Guide to Asymmetric BINOL-Phosphate Derived Brønsted Acid and Metal Catalysis: History and Classification by Mode of Activation; Brønsted Acidity, Hydrogen Bonding, Ion Pairing, and Metal Phosphates. Chem Rev 2017; 117:10608-10620. [DOI: 10.1021/acs.chemrev.7b00197] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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29
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Zhang Z, Li Y, Zhao D, He Y, Gong J, Yang Z. A Concise Synthesis of Presilphiperfolane Core through a Tandem TMTU-Co-Catalyzed Pauson-Khand Reaction and a 6π Electrocyclization Reaction (TMTU=Tetramethyl Thiourea). Chemistry 2017; 23:1258-1262. [DOI: 10.1002/chem.201605438] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Zichun Zhang
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Yuanhe Li
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); College of Chemistry and Molecular Engineering
- Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
| | - Dandan Zhao
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Yingdong He
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Jianxian Gong
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
| | - Zhen Yang
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); College of Chemistry and Molecular Engineering
- Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
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30
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Cai Y, Tang Y, Atodiresei I, Rueping M. Catalytic Asymmetric Piancatelli Rearrangement: Brønsted Acid Catalyzed 4π Electrocyclization for the Synthesis of Multisubstituted Cyclopentenones. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yunfei Cai
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Yurong Tang
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Iuliana Atodiresei
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
- King Abdullah University of Science and Technology (KAUST); KAUST Catalysis Center (KCC); Thuwal 23955-6900 Saudi Arabia
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31
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Cai Y, Tang Y, Atodiresei I, Rueping M. Catalytic Asymmetric Piancatelli Rearrangement: Brønsted Acid Catalyzed 4π Electrocyclization for the Synthesis of Multisubstituted Cyclopentenones. Angew Chem Int Ed Engl 2016; 55:14126-14130. [DOI: 10.1002/anie.201608023] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 09/19/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Yunfei Cai
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Yurong Tang
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Iuliana Atodiresei
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
- King Abdullah University of Science and Technology (KAUST); KAUST Catalysis Center (KCC); Thuwal 23955-6900 Saudi Arabia
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32
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de Gracia Retamosa M, Matador E, Monge D, Lassaletta JM, Fernández R. Hydrazones as Singular Reagents in Asymmetric Organocatalysis. Chemistry 2016; 22:13430-45. [DOI: 10.1002/chem.201602430] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Indexed: 01/01/2023]
Affiliation(s)
- María de Gracia Retamosa
- Instituto de Investigaciones Químicas (CSIC-US) and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Avda. Américo Vespucio, 49 41092 Sevilla Spain)
| | - Esteban Matador
- Departamento de Química Orgánica; Universidad de Sevilla and Centro de Innovación Avanzada (ORFEO-CINQA); C/Prof. García González, 1 41012 Sevilla Spain
| | - David Monge
- Departamento de Química Orgánica; Universidad de Sevilla and Centro de Innovación Avanzada (ORFEO-CINQA); C/Prof. García González, 1 41012 Sevilla Spain
| | - José M. Lassaletta
- Instituto de Investigaciones Químicas (CSIC-US) and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Avda. Américo Vespucio, 49 41092 Sevilla Spain)
| | - Rosario Fernández
- Departamento de Química Orgánica; Universidad de Sevilla and Centro de Innovación Avanzada (ORFEO-CINQA); C/Prof. García González, 1 41012 Sevilla Spain
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33
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Ding ZC, Yang Y, Cai SN, Wen JJ, Zhan ZP. Synthesis of 1,4-Dihydropyridazines from Propargylic Alcohols and Hydrazones via a Cs 2CO 3-mediated Process. CHEM LETT 2016. [DOI: 10.1246/cl.160397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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34
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Du F, Yin L, Ning Y, Peng Y. Catalytic Asymmetric Synthesis of Phosphoryl-1,4-dihydropyridazinesviaan Enantioselective Allylic Alkylation/1,3-Dipolar Cycloaddition/Rearrangement Reaction Sequence. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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35
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Ding ZC, Ju LC, Yang Y, An XM, Zhou YB, Li RH, Tang HT, Ding CK, Zhan ZP. Silver(I)-Catalyzed Tandem Sigamatropic Rearrangement/1,3-H Shift/6π Aza-electrocyclization of N-Propargylic Hydrazones: A Mild Synthetic Route to 1,6-Dihydropyridazines. J Org Chem 2016; 81:3936-41. [DOI: 10.1021/acs.joc.6b00428] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zong-Cang Ding
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Lu-Chuan Ju
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Ying Yang
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Xiao-Ming An
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Yun-Bing Zhou
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Ren-Hao Li
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Hai-Tao Tang
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Cheng-Ke Ding
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Zhuang-Ping Zhan
- Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
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36
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Chatupheeraphat A, Liao H, Mader S, Sako M, Sasai H, Atodiresei I, Rueping M. Asymmetrische Brønsted‐Säure‐katalysierte Substitution von Diarylmethanolen mit Thiolen und Alkoholen zur Synthese von chiralen Thioethern und Ethern. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511179] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Hsuan‐Hung Liao
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Steffen Mader
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR) Osaka University Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR) Osaka University Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Iuliana Atodiresei
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Magnus Rueping
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
- King Abdullah University of Science and Technology (KAUST) KAUST Catalysis Center (KCC) Thuwal 23955-6900 Saudi Arabien
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37
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Chatupheeraphat A, Liao HH, Mader S, Sako M, Sasai H, Atodiresei I, Rueping M. Asymmetric Brønsted Acid Catalyzed Substitution of Diaryl Methanols with Thiols and Alcohols for the Synthesis of Chiral Thioethers and Ethers. Angew Chem Int Ed Engl 2016; 55:4803-7. [DOI: 10.1002/anie.201511179] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/08/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Adisak Chatupheeraphat
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Hsuan-Hung Liao
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Steffen Mader
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Iuliana Atodiresei
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
- King Abdullah University of Science and Technology (KAUST); KAUST Catalysis Center (KCC); Thuwal 23955-6900 Saudi Arabia
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38
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Zhang CL, Wang DL, Chen KQ, Ye S. N-Heterocyclic carbene-catalyzed [3 + 3] cyclocondensation of bromoenals with hydrazones: highly enantioselective synthesis of dihydropyridazones. Org Biomol Chem 2016; 13:11255-62. [PMID: 26411575 DOI: 10.1039/c5ob01748c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The N-heterocyclic carbene-catalyzed [3 + 3] cyclocondensation of bromoenals and hydrazones is developed to give the corresponding chiral 4,5-dihydropyridazones in good yields with excellent enantioselectivities.
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Affiliation(s)
- Chun-Lin Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Dong-Ling Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Kun-Quan Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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39
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Heggen B, Patil M, Thiel W. Cyclization of anα,β-Unsaturated hydrazone catalyzed by a BINOL-phosphoric acid: Pericyclic or not? J Comput Chem 2015; 37:280-5. [DOI: 10.1002/jcc.24044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 07/17/2015] [Accepted: 07/20/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Berit Heggen
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Mahendra Patil
- Centre for Excellence in Basic Sciences Health Centre, University of Mumbai; Vidhyanagaria Campus Mumbai 400098 India
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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40
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Volla CMR, Das A, Atodiresei I, Rueping M. Fluorine effects in organocatalysis - asymmetric Brønsted acid assisted Lewis base catalysis for the synthesis of trifluoromethylated heterocycles exploiting the negative hyperconjugation of the CF3-group. Chem Commun (Camb) 2015; 50:7889-92. [PMID: 24911934 DOI: 10.1039/c4cc03229b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Brønsted acid assisted Lewis base catalysis protocol for the synthesis of enantiomerically pure trifluoromethylated dihydropyridazines starting from readily available hydrazones and α,β-unsaturated aldehydes has been developed. The reaction exhibits high tolerance towards many functional groups and is applicable to various aliphatic, aromatic and hetero-aromatic α,β-unsaturated aldehydes, and provides the products in good yields and with excellent enantioselectivities.
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Affiliation(s)
- Chandra M R Volla
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
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41
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Altenhofer EF, Harmata M. Suzuki–Miyaura Coupling Reactions of Conjunctive Reagents: 2-Borylated Allylic Sulfones. J Org Chem 2015; 80:8168-74. [DOI: 10.1021/acs.joc.5b01253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erich F. Altenhofer
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Michael Harmata
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
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42
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Wojciechowska A, Jasiński M, Kaszyński P. Tautomeric equilibrium in trifluoroacetaldehyde arylhydrazones. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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43
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Catalytic enantioselective synthesis of indanes by a cation-directed 5-endo-trig cyclization. Nat Chem 2015; 7:171-7. [DOI: 10.1038/nchem.2150] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 11/25/2014] [Indexed: 01/28/2023]
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44
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Castelló LM, Hornillos V, Vila C, Giannerini M, Fañanás-Mastral M, Feringa BL. Pd-catalyzed cross-coupling of aryllithium reagents with 2-alkoxy-substituted aryl chlorides: mild and efficient synthesis of 3,3'-diaryl BINOLs. Org Lett 2015; 17:62-5. [PMID: 25514438 DOI: 10.1021/ol5032409] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium-catalyzed cross-coupling of aryllithium reagents with 2-alkoxy-substituted aryl chlorides is described. The reactions proceed under mild conditions with short reaction times and provide a wide range of 2-alkoxy-substituted biaryls. This new methodology is applied to the efficient preparation of 3,3'-diaryl BINOLs and represents the first synthesis of this important class of chiral compounds from the corresponding 3,3'-dichloro BINOLs.
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Affiliation(s)
- Luis M Castelló
- Stratingh Institute for Chemistry, University of Groningen , Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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45
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Yadav AK, Yadav LDS. Visible-light-driven electrocyclization of activated allylic amines via azomethine ylide formation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.063] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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46
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Jacob S, Brooks JL, Frontier AJ. No acid required: 4π and 6π electrocyclization reactions of dienyl diketones for the synthesis of cyclopentenones and 2H-Pyrans. J Org Chem 2014; 79:10296-302. [PMID: 25325706 PMCID: PMC4227568 DOI: 10.1021/jo501914w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Indexed: 12/19/2022]
Abstract
The 1,6-conjugate addition of nucleophiles to dienyl diketones produces either cyclopentenone or 2H-pyran products with high selectivity through either Nazarov (4π) or 6π electrocyclization, respectively. The outcome of the reaction is dependent upon the nature of the nucleophile used. Nucleophiles that are anionic or easily deprotonated exclusively produce cyclopentenones via Nazarov cyclization, whereas the neutral nucleophile DABCO promotes 6π cyclization to afford 2H-pyrans. Experimental evidence is presented for both retro-4π and -6π electrocyclization in these systems, lending support to the bifurcated mechanistic hypothesis proposed for these cyclizations.
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Affiliation(s)
- Steven
D. Jacob
- Department of Chemistry, University of
Rochester, Rochester, New York 14627, United
States
| | - Joshua L. Brooks
- Department of Chemistry, University of
Rochester, Rochester, New York 14627, United
States
| | - Alison J. Frontier
- Department of Chemistry, University of
Rochester, Rochester, New York 14627, United
States
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47
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Parmar D, Rueping M. Mild and metal-free oxy- and amino-fluorination for the synthesis of fluorinated heterocycles. Chem Commun (Camb) 2014; 50:13928-31. [DOI: 10.1039/c4cc05027d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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48
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Parmar D, Sugiono E, Raja S, Rueping M. Complete field guide to asymmetric BINOL-phosphate derived Brønsted acid and metal catalysis: history and classification by mode of activation; Brønsted acidity, hydrogen bonding, ion pairing, and metal phosphates. Chem Rev 2014; 114:9047-153. [PMID: 25203602 DOI: 10.1021/cr5001496] [Citation(s) in RCA: 1482] [Impact Index Per Article: 148.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Dixit Parmar
- Institute of Organic Chemistry, RWTH Aachen University , Landoltweg 1, 52074 Aachen, Germany
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49
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Chen W, Jing Z, Chin KF, Qiao B, Zhao Y, Yan L, Tan CH, Jiang Z. Catalytic Asymmetric Conjugate Addition of Mercaptans to β-Substituted-β-Trifluoromethyl Oxazolidinone Enoates: Access to Chiral Trifluoromethylated Tertiary Thioethers and Thiols. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301027] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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50
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Synthetic exploitation of halogenated alkenes containing an electron-withdrawing group: synthesis of α-chlorohydrazones and ketene aminals by regiospecific reactions of in situ generated imide chlorides. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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