1
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Lin J, Han Y, Li B, Gai W, Wang Z, Wang Q, Teng Y, Li J, Li D. Synthesis and biological evaluation of novel penindolone derivatives as potential antiproliferative agents against SCLC in vitro. Bioorg Med Chem Lett 2024; 110:129877. [PMID: 38964518 DOI: 10.1016/j.bmcl.2024.129877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/20/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024]
Abstract
Small cell lung cancer (SCLC) keeps on the leading cause of cancer mortality world widely, while there is lack of efficient therapeutic drugs especially for the resistant ones. In this work, a compound named penindolone (PND) with new skeleton was found to show weak inhibitory effect (IC50 = 42.5 µM) on H69AR cells (SCLC, adriamycin-resistant) proliferation by screening our in-house compound library. With the aim of improving its low potency, a series of PND derivatives were synthesized and biologically evaluated by the Sulforhodamine B (SRB) assay. Among all tested derivatives, compound 5h possessed higher antiproliferation potency (IC50 = 1.6 µM). Furthermore, preliminary mechanism investigation revealed that 5h was able to induce apoptosis and arrest the cell cycle at G0/G1 phase. These findings suggest that this novel skeleton has expanded the anti-SCLC compound reservoir and provided a new drug lead.
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Affiliation(s)
- Jiaqi Lin
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Yongqing Han
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Bohan Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Wenrui Gai
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Zhengjie Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Qi Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Yueling Teng
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China
| | - Jing Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China; Laboratory for Marine Drugs and Bioproducts, Qingdao Marine Science and Technology Center, Qingdao 266237, China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Sanya Oceanographic Institute, Ocean University of China, Qingdao 266003/Sanya 572025, China; Laboratory for Marine Drugs and Bioproducts, Qingdao Marine Science and Technology Center, Qingdao 266237, China.
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2
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Khan DM, Lv J, Hua R. Copper(I)-Catalyzed Formal [4 + 2] Cyclocondensation of ortho-Hydroxybenzyl Alcohol, Aromatic Terminal Alkynes, and Sulfonyl Azides: An Alternative Approach to 2-Sulfonyliminocoumarins. Molecules 2024; 29:3426. [PMID: 39065004 PMCID: PMC11279675 DOI: 10.3390/molecules29143426] [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: 04/15/2024] [Revised: 07/07/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024] Open
Abstract
In this paper, an alternative and efficient copper(I)-catalyzed synthesis of 2-sulfonyliminocoumarins is developed through a three-component reaction of ortho-hydroxybenzyl alcohol, alkynes, and p-toluenesulfonyl azide. The proposed route for access to the 2-iminocoumarin ring involves a [4 + 2] hetero-Diels-Alder reaction between ortho-quinone methide and ketenimine intermediates generated in situ.
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Affiliation(s)
| | | | - Ruimao Hua
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China
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3
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Wang X, Shen B, Liu M, Wang Z, Liu C, Li P, Yu P, Li W. Organocatalytic Enantioselective 1,12-Addition of Alkynyl Biphenyl Quinone Methides Formed In Situ. Angew Chem Int Ed Engl 2024; 63:e202400143. [PMID: 38698663 DOI: 10.1002/anie.202400143] [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: 01/09/2024] [Revised: 04/23/2024] [Accepted: 05/02/2024] [Indexed: 05/05/2024]
Abstract
The chemistry of quinone methides formed in situ has been flourishing in recent years. In sharp contrast, the development and utilization of biphenyl quinone methides are rare. In this study, we achieved a remote stereocontrolled 1,12-conjugate addition of biphenyl quinone methides formed in situ for the first time. In the presence of a suitable chiral phosphoric acid, alkynyl biphenyl quinone methides were generated from α-[4-(4-hydroxyphenyl)phenyl]propargyl alcohols, followed by enantioselective 1,12-conjugate addition with indole-2-carboxylates. The strategy enabled the alcohols to serve as efficient allenylation reagents, providing practical access to a broad range of axially chiral allenes bearing a (1,1'-biphenyl)-4-ol unit, which were previously less accessible. Combined with control experiments, density functional theory calculations shed light on the reaction mechanism, indicating that enantioselectivity originates from the nucleophilic addition of alkynyl biphenyl quinone methides. Notably, not only the presence of biphenyl quinone methides as versatile intermediates was confirmed but also organocatalytic enantioselective 1,12-addition was established.
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Affiliation(s)
- Xing Wang
- Department of Medicinal Chemistry, School of Pharmacy, Qingdao University, Qingdao, Shandong, 266021, China
| | - Boming Shen
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology Guangming Advanced Research Institute, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Meiwen Liu
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology Guangming Advanced Research Institute, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Ziyang Wang
- Department of Medicinal Chemistry, School of Pharmacy, Qingdao University, Qingdao, Shandong, 266021, China
| | - Chang Liu
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology Guangming Advanced Research Institute, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Pengfei Li
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology Guangming Advanced Research Institute, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Peiyuan Yu
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, College of Science, Southern University of Science and Technology Guangming Advanced Research Institute, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Wenjun Li
- Department of Medicinal Chemistry, School of Pharmacy, Qingdao University, Qingdao, Shandong, 266021, China
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4
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Tang Q, Liu Y, Fei B, Tao Q, Wang C, Jiang X, He X, Shang Y. Base-Mediated Cascade Lactonization/1,3-Dipolar Cycloaddition Pathway for the One-Pot Assembly of Coumarin-Functionalized Pyrrolo[2,1- a]isoquinolines. J Org Chem 2024; 89:8420-8434. [PMID: 38836769 DOI: 10.1021/acs.joc.4c00239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
An elegant and highly concise strategy for the construction of coumarin-functionalized pyrrolo[2,1-a]isoquinolines from available propargylamines and isoquinolinium N-ylides has been disclosed. In this reaction, isoquinolinium N-ylides acted as a C2 synthon to form a coumarin ring as well as a 1,3-dipole to construct a pyrrole ring in a single pot. This cascade process involves 1,4-conjugate addition/lactonization/1,3-dipolar cycloaddition to construct four chemical bonds (one C-O bond and three C-C bonds) and two new heterocyclic skeletons. Additionally, most of these compounds showed good fluorescence properties and exhibited high molar extinction coefficient and large Stokes shifts.
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Affiliation(s)
- Qiang Tang
- The Translational Research Institute for Neurological Disorders & Interdisciplinary Research Center of Neuromedicine and Chemical Biology of Wannan Medical College and Anhui Normal University, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu 241001, P. R. China
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
- The Institutes of Brain Science, Wannan Medical College, Wuhu 241001, P. R. China
| | - Yanan Liu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - BinBin Fei
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Qianqian Tao
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Chen Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Xiaochun Jiang
- The Translational Research Institute for Neurological Disorders & Interdisciplinary Research Center of Neuromedicine and Chemical Biology of Wannan Medical College and Anhui Normal University, Department of Neurosurgery, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu 241001, P. R. China
- The Institutes of Brain Science, Wannan Medical College, Wuhu 241001, P. R. China
| | - Xinwei He
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Yongjia Shang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
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5
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Hu T, Zhao Y, Luo X, Li Z, Yang WL. Brønsted acid catalyzed [4 + 2] cycloaddition for the synthesis of bisbenzannulated spiroketals with antifungal activities. Org Biomol Chem 2024; 22:4656-4661. [PMID: 38804023 DOI: 10.1039/d4ob00584h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The intermolecular [4 + 2] cycloaddition of o-hydroxy benzyl alcohols with isochroman ketals was realized by CF3CO2H catalysis. A broad range of bisbenzannulated [6,6]-spiroketals were formed under the metal-free mild conditions in moderate to excellent yields (45-98%) with mostly excellent diastereoselectivities (up to >20 : 1 dr). Furthermore, the enantioselective version was also preliminarily investigated and the bisbenzannulated [6,6]-spiroketal was obtained with 61% ee in the presence of Sc(OTf)3/Feng's chiral N,N'-dioxide ligand. Some of the bisbenzannulated [6,6]-spiroketal products showed good in vitro antifungal activities against Sclerotinia sclerotiorum and Rhizoctonia solani.
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Affiliation(s)
- Teng Hu
- Shanghai Key Laboratory of Chemical Biology & School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
| | - Yuxuan Zhao
- Shanghai Key Laboratory of Chemical Biology & School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
| | - Xiaoyan Luo
- Shanghai Key Laboratory of Chemical Biology & School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
| | - Zhong Li
- Shanghai Key Laboratory of Chemical Biology & School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
| | - Wu-Lin Yang
- Shanghai Key Laboratory of Chemical Biology & School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
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6
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Hu X, Zhu Z, Li Z, Adili A, Odagi M, Abboud KA, Seidel D. Catalytic Enantioselective [4+2] Cycloadditions of Salicylaldehyde Acetals with Enol Ethers. Angew Chem Int Ed Engl 2024; 63:e202315759. [PMID: 38055210 DOI: 10.1002/anie.202315759] [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: 10/18/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/07/2023]
Abstract
A readily accessible conjugate-base-stabilized carboxylic acid (CBSCA) catalyst facilitates highly enantioselective [4+2] cycloaddition reactions of salicylaldehyde-derived acetals and cyclic enol ethers, resulting in the formation of polycyclic chromanes with oxygenation in the 2- and 4-positions. Stereochemically more complex products can be obtained from racemic enol ethers. Spirocyclic products are also accessible.
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Affiliation(s)
- Xiaojun Hu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Zhengbo Zhu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Zhongzheng Li
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Alafate Adili
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Minami Odagi
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
- Department of Biotechnology and Life Science, Graduate School of Technology, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei city, 184-8588, Tokyo, Japan
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
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7
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Li Y, Huang J, Han Z, Huang H, Hong B, Sun J. Organocatalytic Enantioselective Nucleophilic Addition of Indole Imine 5-Methides. Org Lett 2024; 26:396-400. [PMID: 38165742 DOI: 10.1021/acs.orglett.3c04070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Despite the enormous developments in the asymmetric transformations of indole imine methides (IIMs), the remote asymmetric induction involving IIMs remains challenging due to the spatial interaction requirement between the substrate and catalyst. Herein we report the first catalytic asymmetric nucleophilic addition to indole imine 5-methide (5-IIM), the only topological isomer of IIMs whose asymmetric addition remains unknown. Despite the challenging remote stereocontrol, high efficiency and respectable enantioselectivity were achieved to provide access to a range of enantioenriched indole-containing triaryl alkanes.
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Affiliation(s)
- Yuxuan Li
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Jing Huang
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Biqiong Hong
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- College of Materials and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Jianwei Sun
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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8
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Chen X, Li P. Organocatalytic (1+4)-Annulations of MBH Adducts with Electron-Deficient Systems. CHEM REC 2023; 23:e202300152. [PMID: 37294163 DOI: 10.1002/tcr.202300152] [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: 04/29/2023] [Revised: 05/30/2023] [Indexed: 06/10/2023]
Abstract
Benefited from the rapid development of MBH reaction, the reaction of MBH adducts have been established as the most synthetically useful transformations. However, compared with the well-established allylic alkylations and (3+2)-annulations, the (1+4)-annulations of MBH adducts have not developed rapidly until recently. As a helpful complement to the (3+2)-annulations of MBH adducts, the (1+4)-annulations of MBH adducts opens a robust access to structurally diverse five-membered carbo- and heterocycles. This paper summarizes recent advances in organocatalytic (1+4)-annulations using MBH adducts as 1 C-synthons for the construction of functionalized five-membered carbo- and heterocycles.
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Affiliation(s)
- Xuling Chen
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Guangming Advanced Research Institute, College of Science, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong, 518055, China
| | - Pengfei Li
- Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Guangming Advanced Research Institute, College of Science, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong, 518055, China
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9
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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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10
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Zhang X, Xing Q, Gou Z, Gan S, Wang W, Li Z, Shao H, Wang C. Synthesis of Functionalized Tetrahydroquinoline Containing Indole Scaffold via Chemoselective Annulation of Aza- ortho-quinone Methide Precursor. ACS OMEGA 2023; 8:22352-22360. [PMID: 37396238 PMCID: PMC10308564 DOI: 10.1021/acsomega.2c07036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 02/21/2023] [Indexed: 07/04/2023]
Abstract
The chemoselective annulation of aza-ortho-quinone methide generated by in situ o-chloromethyl sulfonamide has been achieved with bifunctional acyclic olefin. This efficient approach provides access to the diastereoselective synthesis of functionalized tetrahydroquinoline derivatives containing indole scaffolds through the inverse-electron-demand aza-Diels-Alder reaction under mild reaction conditions with excellent results (up to 93% yield, > 20:1 dr). Moreover, this article realized the cyclization of α-halogeno hydrazone with electron-deficient alkene affording the tetrahydropyridazine derivatives, which had never been reported.
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Affiliation(s)
- Xiaoke Zhang
- Central
Laboratory, Chongqing University Fuling
Hospital, Chongqing 408000, PR China
- Zunyi
Medical University, Zunyi, Guizhou 563000, China
| | - Qianlu Xing
- Department
of Pediatrics, The Second Affiliated Hospital
of Zunyi Medical University, Zunyi, Guizhou 563000, China
| | - Zhengxing Gou
- Central
Laboratory, Chongqing University Fuling
Hospital, Chongqing 408000, PR China
| | - Song Gan
- Zunyi
Medical University, Zunyi, Guizhou 563000, China
| | - Wenjuan Wang
- Zunyi
Medical University, Zunyi, Guizhou 563000, China
| | - Ziwei Li
- Central
Laboratory, Chongqing University Fuling
Hospital, Chongqing 408000, PR China
| | - Huawu Shao
- Natural
Products Research Centre, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Chaoyong Wang
- Central
Laboratory, Chongqing University Fuling
Hospital, Chongqing 408000, PR China
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11
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Liu S, Chan KL, Lin Z, Sun J. Asymmetric Synthesis of Remotely Chiral Naphthols and Naphthylamines via Naphthoquinone Methides. J Am Chem Soc 2023. [PMID: 37276009 DOI: 10.1021/jacs.3c03557] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Quinone methides are well-established intermediates in asymmetric synthesis. In contrast, their extended analogues with the carbonyl and methide units distributed across two different rings have not been exploited in asymmetric synthesis. Herein, we achieved the first asymmetric process involving such intermediates. Specifically, the use of suitable chiral phosphoric acids enabled in situ generation of 2-naphthoquinone 8-methides and the corresponding aza counterparts for mild one-pot asymmetric nucleophilic addition. These processes provided rapid access to a wide range of previously less accessible remotely chiral naphthols and naphthylamines with both high efficiency and excellent enantioselectivity. Control experiment and DFT calculations provided important insights into the reaction mechanism, which likely involves two phosphoric acid molecules in the enantiodetermining transition states. This work serves as a proof of concept for the exploitation of new types of extended quinone methides as versatile intermediates for asymmetric synthesis, thus providing a new platform for the efficient construction of remote benzylic stereogenic centers of aromatic compounds.
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Affiliation(s)
- Shuxuan Liu
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing 1st Rd, Shenzhen 518057, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Ka Lok Chan
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Zhenyang Lin
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Jianwei Sun
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing 1st Rd, Shenzhen 518057, China
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12
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Sorabad GS, Yang DY. Lewis Acid-Catalyzed 1,4-Addition and Annulation of 4-Hydroxy-coumarins with o-Hydroxyphenyl Propargyl Amines: Entry to Regio-Selective Synthesis of Furano[3,2- c]coumarins and Pyrano[3,2- c]coumarins. J Org Chem 2023; 88:4730-4742. [PMID: 36935550 DOI: 10.1021/acs.joc.3c00213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
A facile and regioselective Lewis acid-catalyzed cascade annulation of o-hydroxyphenyl propargyl amines with 4-hydroxycoumarin to afford furano[3,2-c]coumarin and pyrano[3,2-c]coumarin derivatives is reported. The reaction presumably proceeds by the conjugate addition of 4-hydroxycoumarin to the in situ-generated alkynyl o-quinone methide and is followed by intramolecular 5-exo-dig and 6-endo-dig annulation to form furano[3,2-c]coumarins and pyrano[3,2-c]coumarins, respectively. The prepared o-hydroxyl substituted pyrano[3,2-c]coumarins could be readily transformed into the corresponding coumarin-derived dioxabicycles by acid-mediated cyclization.
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Affiliation(s)
- Ganesh Shivayogappa Sorabad
- Department of Chemistry, Tunghai University, No. 1727, Sec. 4, Taiwan Boulevard, Xitun District, Taichung 407224, Taiwan
| | - Ding-Yah Yang
- Department of Chemistry, Tunghai University, No. 1727, Sec. 4, Taiwan Boulevard, Xitun District, Taichung 407224, Taiwan.,Graduate Program for Biomedical and Materials Science, Tunghai University, No. 1727, Sec. 4, Taiwan Boulevard, Xitun District, Taichung 407224, Taiwan
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13
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Sahoo SR, Singh VK. Brønsted Acid Catalyzed Friedel-Crafts Alkylation of Naphthols with In Situ Generated Naphthol-Derived ortho-Quinone Methides: Synthesis of Chiral and Achiral Xanthene Derivatives. J Org Chem 2023. [PMID: 36866580 DOI: 10.1021/acs.joc.2c02939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
We disclose herein an enantioselective protocol for the Brønsted acid catalyzed addition of naphthols to in situ generated naphthol-derived ortho-quinone methides (o-QMs) followed by intramolecular cyclization, which delivers substituted chiral xanthene derivatives, in a one-pot reaction sequence under mild conditions. This process serves to convert naphthol-derived ortho-hydroxyl benzylic alcohols into reactive naphthol-derived o-QMs using a chiral phosphoric acid (CPA) catalyst. Moreover, it is helpful in controlling the enantioselectivity of the carbon-carbon bond-forming event via hydrogen-bonding followed by intramolecular cyclization. Additionally, for the first time, we observe a Brønsted acid catalyzed C(sp2)-C(sp3) bond cleavage of naphthol-derived ortho-hydroxyl benzylic alcohols for the synthesis of achiral xanthene (sigma plane containing) derivatives in good to excellent yields.
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Affiliation(s)
- Sushree Ranjan Sahoo
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Vinod K Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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14
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Liao G, Mi C, Yang L, Zhang H, Ding X, Cai M, Wang H, Mei W, Dai H, Tang X. p-Quinone Methide-Mediated Nonenzymatic Formation of Chalcane-Containing Dimers in Dragon's Blood. Org Lett 2022; 24:9275-9280. [PMID: 36512336 DOI: 10.1021/acs.orglett.2c03850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Chalcane-containing dimers are major compounds identified from dragon's blood, the red resin that accumulates in Dracaena trees after injury. The key step for the formation of these dimers was a p-quinone methide (p-QM, 3) mediated nonenzymatic Michael addition. Compound 3 is derived from the spontaneous dehydration of chalcane alcohol-M274 (2). Two dihydroflavonol-4-reductases, discovered in D. cambodiana, reduce dihydrochalcone-M272 (7) to 2. Moreover, the application potential of p-QMs was demonstrated using a 3-like p-QM to synthesize diverse dimeric derivatives.
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Affiliation(s)
- Ge Liao
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.,Institute of Molecular Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Chengneng Mi
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.,College of Pharmacy, Xiangnan University, Chenzhou 423000, China
| | - Li Yang
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Haili Zhang
- Institute of Molecular Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Xupo Ding
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Mingwei Cai
- Institute of Molecular Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Hao Wang
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Wenli Mei
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Haofu Dai
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Xiaoyu Tang
- Institute of Molecular Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
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15
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Gou B, Tang Y, Lin Y, Yu L, Jian Q, Sun H, Chen J, Zhou L. Modular Construction of Heterobiaryl Atropisomers and Axially Chiral Styrenes via All‐Carbon Tetrasubstituted VQMs. Angew Chem Int Ed Engl 2022; 61:e202208174. [DOI: 10.1002/anie.202208174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Indexed: 02/06/2023]
Affiliation(s)
- Bo‐Bo Gou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Yue Tang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Yan‐Hong Lin
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Le Yu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Qing‐Song Jian
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Huai‐Ri Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science National Demonstration Center for Experimental Chemistry Education Northwest University Xi'an 710127 P. R. China
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16
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Wang JP, Song S, Wu Y, Wang P. Construction of azaheterocycles via Pd-catalyzed migratory cycloannulation reaction of unactivated alkenes. Nat Commun 2022; 13:5059. [PMID: 36030256 PMCID: PMC9420149 DOI: 10.1038/s41467-022-32726-x] [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] [Received: 04/21/2022] [Accepted: 08/11/2022] [Indexed: 11/09/2022] Open
Abstract
Azahetereocycles constitute important structural components in many biologically active natural compounds and marketed drugs, and represent the most promising scaffolds in drug discovery. Accordingly, the development of efficient and general synthetic methods for the construction of diverse azaheterocycles is the major goal in synthetic chemistry. Herein, we report the efficient construction of a wide range of azaheterocycles via a Pd-catalyzed migratory cycloannulation strategy with unactivated alkenes. This strategy enables the rapid synthesis of a series of 6-, 7- and 8-membered azaheterocycles in high efficiency, and features a broad substrate scope, excellent functional group tolerance under redox-neutral conditions. The significance of this finding is demonstrated by the efficient synthesis of drug-like molecules with high step-economy. Preliminary mechanistic investigations reveal that this reaction underwent a sequentially migratory insertion to alkenes, metal migration process, and the aza-Michael addition to a quinone methide intermediate.
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Affiliation(s)
- Jin-Ping Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, CAS 345 Lingling Road, Shanghai, 200032, PR China
| | - Shuo Song
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, CAS 345 Lingling Road, Shanghai, 200032, PR China
| | - Yichen Wu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, CAS 345 Lingling Road, Shanghai, 200032, PR China
| | - Peng Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, CAS 345 Lingling Road, Shanghai, 200032, PR China. .,CAS Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, CAS 345 Lingling Road, Shanghai, 200032, PR China. .,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, PR China.
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17
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Liao H, Miñoza S, Lee S, Rueping M. Aza‐
Ortho
‐Quinone Methides as Reactive Intermediates: Generation and Utility in Contemporary Asymmetric Synthesis. Chemistry 2022; 28:e202201112. [DOI: 10.1002/chem.202201112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Hsuan‐Hung Liao
- Department of Chemistry National Sun Yat-sen University (NSYSU) 70 Lien-hai Rd. Kaohsiung 80424 Taiwan, (R.O.C
| | - Shinje Miñoza
- Department of Chemistry National Sun Yat-sen University (NSYSU) 70 Lien-hai Rd. Kaohsiung 80424 Taiwan, (R.O.C
| | - Shao‐Chi Lee
- KAUST Catalysis Center (KCC) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Magnus Rueping
- KAUST Catalysis Center (KCC) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
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18
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Gou BB, Tang Y, Lin YH, Yu L, Jian QS, Sun HR, Chen J, Zhou L. Modular Construction of Heterobiaryl Atropisomers and Axially Chiral Styrenes via All‐Carbon Tetrasubstituted VQMs. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bo-Bo Gou
- Northwest University College of Chemistry & Materials Science CHINA
| | - Yue Tang
- Northwest University College of Chemistry & Materials Science CHINA
| | - Yan-Hong Lin
- Northwest University College of Chemistry & Materials Science CHINA
| | - Le Yu
- Northwest University College of Chemistry & Materials Science CHINA
| | - Qing-Song Jian
- Northwest University College of Chemistry & Materials Science CHINA
| | - Huai-Ri Sun
- Northwest University College of Chemistry & Materials Science CHINA
| | - Jie Chen
- Northwest University College of Chemistry & Materials Science CHINA
| | - Ling Zhou
- Northwest University College of Chemistry & Materials Science 1 Xuefu Ave., Chang’an District 710127 Xi'an CHINA
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19
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Wu G, Qian X, Huang Y, Liu Y, Zhou L, Wang W, Li J, Zhu T, Gu Q, Li D. Nonenzymatic Self-Assembly Access to Diverse ortho-Quinone Methide-Based Pseudonatural Products. Org Lett 2022; 24:5235-5239. [DOI: 10.1021/acs.orglett.2c02268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guangwei Wu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People’s Republic of China
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
| | - Xuan Qian
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People’s Republic of China
| | - Yeqiang Huang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People’s Republic of China
| | - Yujia Liu
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People’s Republic of China
| | - Luning Zhou
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
| | - Wei Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, People’s Republic of China
| | - Jing Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, People’s Republic of China
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 26003, People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, People’s Republic of China
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20
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Ali K, Mishra P, Kumar A, Reddy DN, Chowdhury S, Panda G. Reactivity vs. selectivity of quinone methides: synthesis of pharmaceutically important molecules, toxicity and biological applications. Chem Commun (Camb) 2022; 58:6160-6175. [PMID: 35522910 DOI: 10.1039/d2cc00838f] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Quinone methides (QMs) are considered to be highly reactive intermediates because of their aromatization both in chemical and biological systems. Being highly accessible, quinone methides (QMs) have been widely exploited and their concurrent use has been manifested for the synthesis of tertiary and quaternary carbon centers of bioactives, drugs and drug-like molecules. In this feature article, the synthetic routes, structure-reactivity relationships and synthetic applications of quinone methides are discussed. Formation of the intermediates during bioactivation of different chemical entities and possible chemical manifestations leading to their toxicity in biological systems are also covered.
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Affiliation(s)
- Kasim Ali
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram Extension, Sector 10, Lucknow 226031, UP, India. .,Academy of Scientific & Industrial Research (AcSIR), Ghaziabad, Uttar Pradesh-201 002, India
| | - Prajjval Mishra
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram Extension, Sector 10, Lucknow 226031, UP, India.
| | - Awnish Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram Extension, Sector 10, Lucknow 226031, UP, India.
| | - Damodara N Reddy
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram Extension, Sector 10, Lucknow 226031, UP, India. .,Academy of Scientific & Industrial Research (AcSIR), Ghaziabad, Uttar Pradesh-201 002, India
| | - Sushobhan Chowdhury
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram Extension, Sector 10, Lucknow 226031, UP, India.
| | - Gautam Panda
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Jankipuram Extension, Sector 10, Lucknow 226031, UP, India. .,Academy of Scientific & Industrial Research (AcSIR), Ghaziabad, Uttar Pradesh-201 002, India
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21
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Davis J, Gharaee M, Karunaratne CV, Cortes Vazquez J, Haynes M, Luo W, Nesterov VN, Cundari T, Wang H. Asymmetric Synthesis of Chromans Through Bifunctional Enamine-Metal Lewis Acid Catalysis. Chemistry 2022; 28:e202200224. [PMID: 35298095 DOI: 10.1002/chem.202200224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Indexed: 11/09/2022]
Abstract
Cooperative enamine-metal Lewis acid catalysis has emerged as a powerful tool to construct carbon-carbon and carbon-heteroatom bond forming reactions. A concise synthetic method for asymmetric synthesis of chromans from cyclohexanones and salicylaldehydes has been developed to afford tricyclic chromans containing three consecutive stereogenic centers in good yields (up to 87 %) and stereoselectivity (up to 99 % ee and 11 : 1 : 1 dr). This difficult organic transformation was achieved through bifunctional enamine-metal Lewis acid catalysis. It is believed that the strong activation of the salicylaldehydes through chelating to the metal Lewis acid and the bifunctional nature of the catalyst accounts for the high yields and enantioselectivity of the reaction. The absolute configurations of the chroman products were established through X-ray crystallography. DFT calculations were conducted to understand the mechanism and stereoselectivity of this reaction.
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Affiliation(s)
- Jacqkis Davis
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Mojgan Gharaee
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | | | | | - Mikayla Haynes
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Weiwei Luo
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | | | - Thomas Cundari
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Hong Wang
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
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22
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Forjan M, Zgrablić G, Vdović S, Šekutor M, Basarić N, Kabacinski P, Nazari Haghighi Pashaki M, Frey HM, Cannizzo A, Cerullo G. Photogeneration of quinone methide from adamantylphenol in an ultrafast non-adiabatic dehydration reaction. Phys Chem Chem Phys 2022; 24:4384-4393. [PMID: 35112685 PMCID: PMC8849006 DOI: 10.1039/d1cp05690e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/24/2022] [Indexed: 01/23/2023]
Abstract
The ultrafast photochemical reaction of quinone methide (QM) formation from adamantylphenol was monitored in real time using femtosecond transient absorption spectroscopy and fluorescence upconversion in solution at room temperature. Experiments were complemented by theoretical studies simulating the reaction pathway and elucidating its mechanism. Excitation with sub-20 fs UV pulses and broadband probing revealed ultrafast formation of the long-lived QM intermediate directly in the ground state, occurring with a time constant of around 100 fs. UV-vis transient absorption data covering temporal dynamics from femtoseconds to hundreds of milliseconds revealed persistence of the absorption band assigned to QM and partially overlapped with other contributions tentatively assigned to triplet excited states of the adamantyl derivative and the phenoxyl radical that are clearly distinguished by their evolution on different time scales. Our data, together with the computations, provide evidence of a non-adiabatic photodehydration reaction, which leads to the formation of QM in the ground state via a conical intersection, circumventing the generation of a transient QM excited state.
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Affiliation(s)
- Mateo Forjan
- Institute of Physics, Bijenička cesta 46, 10 000 Zagreb, Croatia.
| | - Goran Zgrablić
- Institute of Physics, Bijenička cesta 46, 10 000 Zagreb, Croatia.
| | - Silvije Vdović
- Institute of Physics, Bijenička cesta 46, 10 000 Zagreb, Croatia.
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10 000 Zagreb, Croatia
| | - Nikola Basarić
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10 000 Zagreb, Croatia
| | - Piotr Kabacinski
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
| | | | - Hans-Martin Frey
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - Andrea Cannizzo
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - Giulio Cerullo
- IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
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23
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Martins MTM, Dias FRF, de Moraes RSM, da Silva MFV, Lucio KR, D'Oliveira Góes K, do Nascimento PA, da Silva ASS, Ferreira VF, Cunha AC. Multicomponent Reactions (MCRs) with o-Quinone Methides. CHEM REC 2022; 22:e202100251. [PMID: 35112473 DOI: 10.1002/tcr.202100251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/19/2021] [Indexed: 12/13/2022]
Abstract
This article presents a comprehensive overview of multicomponent reactions (MCRs) that proceed via ortho-quinone methide intermediates (o-QM) generated in the reaction medium. Examples of applications involving these highly reactive intermediates in organic synthesis and biological processes (e. g., biosynthetic pathways, prodrug cleavage and electrophilic capture of biological nucleophiles) are also described. QMs are often generated by eliminative processes of phenol derivatives or by photochemical reactions, including reversible generation in photochromic substances. This class of compounds can undergo various reaction types, including nucleophilic attack at the methide carbon, with subsequent rearomatization, and react with electron-rich dienophiles in inverse-electron demand hetero-Diels-Alder reactions. Its versatile reactivity has been explored in the context of cascade reactions for the construction of several classes of substances, including complex natural products.
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Affiliation(s)
- Maria Tereza M Martins
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Flaviana Rodrigues F Dias
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Raphael Silva M de Moraes
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Marcos Felipe V da Silva
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Kaio R Lucio
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Karina D'Oliveira Góes
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Patrick A do Nascimento
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - André S S da Silva
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
| | - Vitor F Ferreira
- Universidade Federal Fluminense, Faculdade de Farmácia, Departamento de Tecnologia Farmacêutica, CEP, 24241-000, Niterói, Rio de Janeiro, Brazil
| | - Anna C Cunha
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, Programa de Pós-Graduação em Química, 24020-141, Niterói, Rio de Janeiro, Brazil
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24
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He Y, Wu P, Zhang X, Wang T, Tao Q, Zhou K, Ouyang Z, Zhai H, Cheng DJ, Cheng B. Synthesis of aryl-fused 1,4-oxathiepines from pyridinium 1,4-zwitterionic thiolates and vinylidene ortho-quinone methides. Org Chem Front 2022. [DOI: 10.1039/d2qo00735e] [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
Synthesis of aryl-fused 1,4-oxathiepines from pyridinium 1,4-zwitterionic thiolates with vinylidene ortho-quinone methides generated in situ via a formal (3 + 4) pathway.
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Affiliation(s)
- Yixuan He
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Ping Wu
- Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong, Dezhou College, Dezhou 253023, China
| | - Xiang Zhang
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Taimin Wang
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Qingqing Tao
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Kang Zhou
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Zijun Ouyang
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Hongbin Zhai
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
- State Key Laboratory of Chemical Oncogenomics, Shenzhen Engineering Laboratory of Nano Drug Slow-Release, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Dao-Juan Cheng
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Bin Cheng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen 518055, China
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25
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Hu F, Shen YB, Wang L, Li SS. Merging dearomatization with redox-neutral C(sp 3)–H functionalization via hydride transfer/cyclization: recent advances and perspectives. Org Chem Front 2022. [DOI: 10.1039/d2qo01054b] [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
This review highlights the encouraging advances in hydride transfer-involved dearomatization reaction during the past decade, the content of which is categorized according to the hydride acceptors, namely vinylogous imines and quinone methides.
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Affiliation(s)
- Fangzhi Hu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Yao-Bin Shen
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
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26
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Nipate DS, Sonam, Shinde VN, Rangan K, Kumar A. TEMPO-Mediated Synthesis of Indolyl/Imidazo[1,2- a]pyridinyl-Substituted para-Quinone Methides from Butylated Hydroxytoluene. J Org Chem 2021; 86:17090-17100. [PMID: 34762443 DOI: 10.1021/acs.joc.1c02202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of indolyl or imidazo[1,2-a]pyridinyl-substituted para-quinone methides (p-QMs) is prepared by a metal-free, TEMPO-mediated cross-dehydrogenative coupling of butylated hydroxytoluene (BHT) with indoles or imidazo[1,2-a]pyridines in good to high yields. Broad substrate scope with respect to indoles and imidazo[1,2-a]pyridines, good functional group tolerance, and acid/base-free conditions are advantageous feature of the developed protocol. The method was amenable for scale-up on the gram scale. Based on control experiments, a reaction mechanism is proposed to describe this transformation.
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Affiliation(s)
- Dhananjay S Nipate
- Department of Chemistry, Birla Institute of Technology & Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Sonam
- Department of Chemistry, Birla Institute of Technology & Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Vikki N Shinde
- Department of Chemistry, Birla Institute of Technology & Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology & Science Pilani, Hyderabad Campus, Telangana 500078, India
| | - Anil Kumar
- Department of Chemistry, Birla Institute of Technology & Science Pilani, Pilani Campus, Rajasthan 333031, India
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27
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Kato K, Uraguchi D, Ooi T. o-Quinone methide with overcrowded olefinic core as a catalytically-active surrogate of triarylmethylium salt for dehydridative oxidation of benzylic alcohols under aerobic photoirradiation conditions. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Wang D, Sun J, Yan CG. Diastereoselective synthesis of spiro[chromane-3,3′-indolines] and spiro[chromane-3,2′-indenes] via DBU promoted formal [4 + 2]cycloaddition reaction. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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29
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Gharui C, Parida C, Pan SC. Organocatalytic Asymmetric Addition of Aromatic α-Cyanoketones to o-Quinone Methides: Synthesis of 3,4-Dihydrocoumarins and Tetrasubstituted Chromans. J Org Chem 2021; 86:13071-13081. [PMID: 34464133 DOI: 10.1021/acs.joc.1c00435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The first organocatalytic asymmetric addition of aromatic α-cyanoketones to in situ-generated o-quinone methides has been developed. The products 3,4-dihydrocoumarin and tetrasubstituted chroman were obtained via addition of aromatic α-cyanoketones to in situ-generated o-quinone methides followed by treatment with 0.7 N HCl. With 10 mol % catalyst, the desired products were obtained in high enantio- and diastereoselectivities.
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Affiliation(s)
- Chandan Gharui
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Chandrakanta Parida
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Subhas Chandra Pan
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
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30
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Tian X, Zhang X, Hou X, Ren W, Li X, Zhao F, Tao H, Wang Y. Formal [4+1] Cyclization of
ortho
‐ or
para
‐Quinone Methides with 3‐Chlorooxindoles: Synthesis of 3,2′‐Tetrahydrofuryl Spirooxindoles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100363] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiaochen Tian
- Molecular Synthesis Center & Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China 5 Yushan Road Qingdao 266003 P. R. China
| | - Xiaoli Zhang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China 5 Yushan Road Qingdao 266003 P. R. China
| | - Xiaohan Hou
- Molecular Synthesis Center & Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China 5 Yushan Road Qingdao 266003 P. R. China
| | - Weiwu Ren
- Molecular Synthesis Center & Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China 5 Yushan Road Qingdao 266003 P. R. China
- Laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and Technology (QNLM) Qingdao 266237 P. R. China
| | - Xiaoyang Li
- Molecular Synthesis Center & Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China 5 Yushan Road Qingdao 266003 P. R. China
| | - Fei Zhao
- iHuman Institute ShanghaiTech University Ren Building 393 Middle Huaxia Rd, Pudong New District Shanghai 201210 P. R. China
| | - Houchao Tao
- iHuman Institute ShanghaiTech University Ren Building 393 Middle Huaxia Rd, Pudong New District Shanghai 201210 P. R. China
| | - Yang Wang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China 5 Yushan Road Qingdao 266003 P. R. China
- Laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and Technology (QNLM) Qingdao 266237 P. R. China
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31
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Lu Z, Zhang Q, Ke M, Hu S, Xiao X, Chen F. TfOH-Catalyzed [4 + 1] Annulation of p-Quinone Methides with α-Aryl Diazoacetates: Straightforward Access to Highly Functionalized 2,3-Dihydrobenzofurans. J Org Chem 2021; 86:7625-7635. [PMID: 33993694 DOI: 10.1021/acs.joc.1c00672] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We have developed a methodology for the greatly efficient construction of significant 2,3-dihydrobenzofuran scaffolds bearing a quaternary carbon center at the C2 position by means of [4 + 1] annulation reactions between p-quinone methides and α-aryl diazoacetates as C1 synthons through organocatalysis by readily accessible TfOH catalyst under mild and transition metal-free conditions. This metal-free protocol furnishes an operationally simple and swift process for the free assembly of diverse highly functionalized 2,3-dihydrobenzofurans and also features broad substrate scope, excellent functional group compatibility, and environmental friendliness. Mechanistic investigation suggested that the reaction undergoes a rapid cascade protonation/intermolecular Michael addition/intramolecular substitution process.
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Affiliation(s)
- Zuolin Lu
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Qingchun Zhang
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Miaolin Ke
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Sha Hu
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Fudan University, Shanghai 200433, P.R. China
| | - Xiao Xiao
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Fener Chen
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, P.R. China.,Engineering Center of Catalysis and Synthesis for Chiral Molecules, Fudan University, Shanghai 200433, P.R. China.,Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs, Shanghai 200433, China
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32
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Lin C, Xing Q, Xie H. A formal intermolecular [4 + 1] cycloaddition reaction of 3-chlorooxindole and o-quinone methides: a facile synthesis of spirocyclic oxindole scaffolds. RSC Adv 2021; 11:18576-18579. [PMID: 35480909 PMCID: PMC9033455 DOI: 10.1039/d1ra01086g] [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: 02/09/2021] [Accepted: 05/08/2021] [Indexed: 12/11/2022] Open
Abstract
Herein, we developed an efficient and straightforward method for the rapid synthesis of spirocyclic oxindole scaffolds via the [4 + 1] cyclization reaction of 3-chlorooxindole with o-quinone methides (o-QMs), which were generated under mild conditions. The products could be obtained in excellent yields with numerous types of 3-chlorooxindole. This methodology features mild reaction conditions, high atom-economy and broad substrate scope. Herein, we developed an efficient and straightforward method for the rapid synthesis of spirocyclic oxindole scaffolds via the [4 + 1] cyclization reaction of 3-chlorooxindole with o-quinone methides (o-QMs), which were generated under mild conditions.![]()
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Affiliation(s)
- Chao Lin
- Yantai Key Laboratory of Nanomedicine & Advanced Preparations, Yantai Institute of Materia Medica Shandong 264000 China
| | - Qi Xing
- Yantai Key Laboratory of Nanomedicine & Advanced Preparations, Yantai Institute of Materia Medica Shandong 264000 China
| | - Honglei Xie
- Yantai Key Laboratory of Nanomedicine & Advanced Preparations, Yantai Institute of Materia Medica Shandong 264000 China
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33
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Ma Y, He X, Yang Q, Boucherif A, Xuan J. Recent Advances in Organocatalytic Asymmetric Cycloaddition Reactions Through
Ortho
‐Quinone Methide Scaffolds. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100141] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yu‐Hong Ma
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang Hubei 443002 P. R. China
| | - Xiao‐Yu He
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang Hubei 443002 P. R. China
| | - Qing‐Qing Yang
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang Hubei 443002 P. R. China
| | - Amina Boucherif
- Department of biology Aboubeker Belkaïd University BP119 Tlemcen 13000 Algeria
| | - Jun Xuan
- College of Chemistry & Chemical Engineering Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials Anhui University Anhui Hefei 230601 P. R. China
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34
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Wei B, Ren Q, Bein T, Knochel P. Transition-Metal-Free Synthesis of Polyfunctional Triarylmethanes and 1,1-Diarylalkanes by Sequential Cross-Coupling of Benzal Diacetates with Organozinc Reagents. Angew Chem Int Ed Engl 2021; 60:10409-10414. [PMID: 33625773 PMCID: PMC8252654 DOI: 10.1002/anie.202101682] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Indexed: 12/02/2022]
Abstract
A variety of functionalized triarylmethane and 1,1-diarylalkane derivatives were prepared via a transition-metal-free, one-pot and two-step procedure, involving the reaction of various benzal diacetates with organozinc reagents. A sequential cross-coupling is enabled by changing the solvent from THF to toluene, and a two-step SN 1-type mechanism was proposed and evidenced by experimental studies. The synthetic utility of the method is further demonstrated by the synthesis of several biologically relevant molecules, such as an anti-tuberculosis agent, an anti-breast cancer agent, a precursor of a sphingosine-1-phosphate (S1P) receptor modulator, and a FLAP inhibitor.
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Affiliation(s)
- Baosheng Wei
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Qianyi Ren
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Thomas Bein
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Paul Knochel
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
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35
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Luo WF, Ye LW, Li L, Qian PC. Regio- and diastereoselective synthesis of trans-3,4-diaryldihydrocoumarins via metal-free [4+2] annulation of ynamides with o-hydroxybenzyl alcohols. Chem Commun (Camb) 2021; 57:5032-5035. [PMID: 33881063 DOI: 10.1039/d1cc00687h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient regio- and diastereoselective method for the construction of valuable trans-3,4-diaryldihydrocoumarins via metal-free [4+2] annulation of ynamides with o-hydroxybenzyl alcohols has been developed. Ynamides are first treated as 2-π partners to react with o-hydroxybenzyl alcohols via traceless sulfonamide directing groups, affording trans-3,4-diaryldihydrocoumarins in good yields with high regio- and diastereoselectivities. This metal-free methodology is also characterized by a wide substrate scope, good functional group tolerance, and efficiency on a gram scale.
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Affiliation(s)
- Wen-Feng Luo
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China.
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36
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Sharma A, Hazarika H, Gogoi P. o-Quinone Methides and o-Quinone Sulfides via Arynes: Synthesis of Ortho-Disubstituted Arenes and Heterocycles. J Org Chem 2021; 86:4883-4895. [PMID: 33471525 DOI: 10.1021/acs.joc.0c02908] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In recent decades, o-quinone methides and o-quinone sulfides have been extensively highlighted as reactive intermediates for the synthesis of diversely functionalized ortho-disubstituted arenes and heterocycles. Additionally, ortho-disubstituted arenes offer a constructive path for the synthesis of fused carbocycles, heterocycles, natural products, and drug candidates. In the lieu of that, this Synopsis highlights a comprehensive overview on the potential applications of in situ generated o-quinone methides and o-quinone sulfides for one-pot synthesis of ortho-disubstituted arenes and heterocycles via arynes.
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Affiliation(s)
- Abhilash Sharma
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Hemanta Hazarika
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pranjal Gogoi
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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37
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Sachse F, Schneider C. Cooperative Photoinduced/Brønsted Acid Catalyzed Cycloaddition of Transient Thioaldehydes and ortho-Quinone Methides toward a Synthesis of Benzo[ e][1,3]oxathiines. Org Lett 2021; 23:2682-2686. [PMID: 33733788 DOI: 10.1021/acs.orglett.1c00588] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A cooperative, one-pot approach for the in situ generation and ensuing cycloaddition of thioaldehydes and ortho-quinone methides transiently formed under irradiation with UV-A light and Brønsted acid catalysis, respectively, has been developed giving direct access to benzo[e][1,3]oxathiines in good to excellent yields and diastereoselectivity. Both electron-rich and electron-poor thioaldehydes easily react with a broad range of ortho-quinone methides at ambient temperature in a short reaction time to furnish a wide variety of S,O-heterocycles.
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Affiliation(s)
- Florian Sachse
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Christoph Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
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38
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Wei B, Ren Q, Bein T, Knochel P. Übergangsmetallfreie Synthese polyfunktioneller Triarylmethane und 1,1‐Diarylalkane durch sequentielle Kreuzkupplungen von Benzaldiacetaten mit Organozinkreagenzien. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Baosheng Wei
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Qianyi Ren
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Thomas Bein
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
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39
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Yan LQ, Yin Z, He X, Li Q, Li R, Duan J, Xu K, Tang Q, Shang Y. Copper-Catalyzed Cascade 1,4-Addition/Annulation/Hydrolysis of Propargylamines with 2-Hydroxynaphthalene-1,4-diones: Direct Formation of 12-Phenacyl-11 H-benzo[ b]xanthenes. J Org Chem 2021; 86:4182-4192. [PMID: 33625853 DOI: 10.1021/acs.joc.0c03029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel and versatile approach to construct 12-phenacyl-11H-benzo[b]xanthene-6,11(12H)-dione derivatives through copper-catalyzed cascade reaction of propargylamines with 2-hydroxynaphthalene-1,4-diones has been developed. The procedure is proposed to go through a sequence of 1,4-conjugate addition, intramolecular nucleophilic addition/dehydration, and hydrolysis of alkyne followed by an enol-ketone tautomerization. The reaction provides a new and highly efficient method for the synthesis of 12-phenacyl-11H-benzo[b]xanthene-6,11(12H)-diones by formation of three new bonds and one heterocycle from readily available starting materials in good to high yields (70-88%) with broad functional group compatibility in a single step.
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Affiliation(s)
- Li-Qin Yan
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Zhenzhen Yin
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Xinwei He
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Qianqian Li
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Ruxue Li
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Jiahui Duan
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Keke Xu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Qiang Tang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Yongjia Shang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
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40
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Lu ZY, Hu JT, Lan WQ, Mo XQ, Zhou S, Tang YF, Yuan WC, Zhang XM, Liao LH. Enantioselective synthesis of hetero-triarylmethanes by chiral phosphoric acid-catalyzed 1,4-addition of 3-substituted indoles with azadienes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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41
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Sankar R, Bhattacharya D, Arulananda Babu S. Synthesis of 1‐Naphthol‐based Unsymmetrical Triarylmethanes: Heck‐type Desulfitative Reaction of Arylsulfonyl Chlorides with Tetralone‐derived Chalcones. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rathinam Sankar
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar 140306 Mohali, Manauli P.O. Punjab India
| | - Debabrata Bhattacharya
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar 140306 Mohali, Manauli P.O. Punjab India
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar 140306 Mohali, Manauli P.O. Punjab India
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42
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Wang HQ, Ma W, Sun A, Sun XY, Jiang C, Zhang YC, Shi F. (4 + 2) cyclization of aza- o-quinone methides with azlactones: construction of biologically important dihydroquinolinone frameworks. Org Biomol Chem 2021; 19:1334-1343. [PMID: 33464269 DOI: 10.1039/d0ob02388d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A base-promoted (4 + 2) cyclization of aza-o-quinone methides (aza-o-QMs) in situ generated from N-(o-chloromethyl)aryl amides was established. In this approach, azlactones were utilized as competent two-atom reaction partners to undergo (4 + 2) cyclization with aza-o-QMs, which afforded a series of dihydroquinolinone derivatives in overall good yields (up to 98%). This protocol has not only advanced the development of aza-o-QM-involved reactions, but also offered a useful method for constructing biologically important dihydroquinolinone frameworks.
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Affiliation(s)
- Hai-Qing Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
| | - Wenjing Ma
- Core Facility Center of Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| | - Ao Sun
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
| | - Xin-Yue Sun
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
| | - Chao Jiang
- Core Facility Center of Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| | - Yu-Chen Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
| | - Feng Shi
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
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43
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Uraguchi D, Kato K, Ooi T. o-Quinone methide with overcrowded olefin component as a dehydridation catalyst under aerobic photoirradiation conditions. Chem Sci 2021; 12:2778-2783. [PMID: 34164041 PMCID: PMC8179400 DOI: 10.1039/d0sc06240e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
An o-quinone methide (o-QM) featuring an overcrowded olefinic framework is introduced, which exhibits dehydridation activity owing to its enhanced zwitterionic character, particularly through photoexcitation. The characteristics of this o-QM enable the operation of dehydridative catalysis in the oxidation of benzylic secondary alcohols under aerobic photoirradiation conditions. An experimental analysis and density functional theory calculations provide mechanistic insights; the ground-state zwitterionic intermediate abstracts a hydride and proton simultaneously, and the active oxygen species facilitate catalyst regeneration. An o-quinone methide (o-QM) featuring an overcrowded olefinic framework is introduced, which exhibits dehydridation activity owing to its enhanced zwitterionic character, particularly through photoexcitation.![]()
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Affiliation(s)
- Daisuke Uraguchi
- Institute for Catalysis, Hokkaido University Sapporo 001-0021 Japan
| | - Kohsuke Kato
- Institute of Transformative Bio-Molecules (WPI-ITbM), Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University Nagoya 464-8601 Japan
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM), Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University Nagoya 464-8601 Japan
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44
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Estopiñá‐Durán S, Taylor JE. Brønsted Acid-Catalysed Dehydrative Substitution Reactions of Alcohols. Chemistry 2021; 27:106-120. [PMID: 32491202 PMCID: PMC7820959 DOI: 10.1002/chem.202002106] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Indexed: 12/13/2022]
Abstract
The direct, catalytic dehydrative substitution of alcohols is a challenging, yet highly desirable process in the development of more sustainable approaches to organic chemistry. This review outlines recent advances in Brønsted acid-catalysed dehydrative substitution reactions for C-C, C-O, C-N and C-S bond formation. The wide range of processes that are now accessible using simple alcohols as the formal electrophile are highlighted, while current limitations and therefore possible future directions for research are also discussed.
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Affiliation(s)
- Susana Estopiñá‐Durán
- Department of ChemistryUniversity of BathClaverton DownBathBA2 7AYUK
- EaStCHEMSchool of ChemistryUniversity of St AndrewsNorth HaughSt AndrewsKY16 9STUK
| | - James E. Taylor
- Department of ChemistryUniversity of BathClaverton DownBathBA2 7AYUK
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45
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Li NK, Sun BB, Chen JB, Yang HD, Wang BL, Yu JQ, Wang XW, Wang Z. Box-copper catalyzed asymmetric inverse-electron-demand oxa-hetero-Diels–Alder reaction for efficient synthesis of spiro pyranyl-oxindole derivatives. Org Chem Front 2021. [DOI: 10.1039/d0qo01407a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A chiral Box/Cu catalyzed asymmetric IEDDA reaction between isatin-derived β,γ-unsaturated α-ketoesters and electron-rich olefins was developed, which provided chiral spiro oxindole-pyrans in excellent yields with excellent stereoselectivities.
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Affiliation(s)
- Nai-Kai Li
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Bing-Bing Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Jun-Bo Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Hao-Di Yang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Bai-Lin Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Jie-Qiang Yu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Xing-Wang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Zheng Wang
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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46
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Varlet T, Masson G. Enamides and dienamides in phosphoric acid-catalysed enantioselective cycloadditions for the synthesis of chiral amines. Chem Commun (Camb) 2021; 57:4089-4105. [DOI: 10.1039/d1cc00590a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This feature article describes how enamides and dienamides can participate in chiral phosphoric acid catalyzed enantioselective cycloadditions to prepare a wide range of cyclic amines.
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Affiliation(s)
- Thomas Varlet
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
| | - Géraldine Masson
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
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47
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Affiliation(s)
- Dominika Roos
- Eberhard Karls Universität Tübingen Institut für Organische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Martin E. Maier
- Eberhard Karls Universität Tübingen Institut für Organische Chemie Auf der Morgenstelle 18 72076 Tübingen Germany
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48
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Jha BK, Prudhviraj J, Mainkar PS, Punna N, Chandrasekhar S. Diastereoselective synthesis of CF 3-dihydrobenzofurans by [4+1] annulation of in situ-generated CF 3- o-quinone methides and sulfur ylides. RSC Adv 2020; 10:38588-38591. [PMID: 35517513 PMCID: PMC9057278 DOI: 10.1039/d0ra08289a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 09/29/2020] [Indexed: 12/18/2022] Open
Abstract
An efficient and highly diastereoselective synthesis of CF3-dihydrobenzofurans by the reaction of in situ-generated CF3-oQMs in the presence of a base with sulphur ylides is put forward. The generality of the present developed method was well studied with diverse substrates to access the corresponding products in excellent yields. The highly reactive CF3-oQM has been utilized first time for the annulation reaction. The first [4 + 1] annulation reaction of in situ-generated highly electrophilic CF3-ortho-quinone methides with sulphur ylides has been put forth under mild reaction conditions to access CF3-dihydrobenzofurans.![]()
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Affiliation(s)
- Babli K Jha
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Jaggaraju Prudhviraj
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
| | - Prathama S Mainkar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Nagender Punna
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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49
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Salvio R, Placidi S, Bella M. Benzazetidines and Related Compounds: Synthesis and Potential. Chemistry 2020; 26:10157-10174. [DOI: 10.1002/chem.201905668] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/24/2020] [Indexed: 12/28/2022]
Affiliation(s)
- Riccardo Salvio
- Dipartimento di Scienze e Tecnologie Chimiche Università “Tor Vergata” Via della Ricerca Scientifica, 1 00133 Roma Italy
- ISB—CNR Sezione Meccanismi di Reazione Università La Sapienza 00185 Roma Italy
| | - Simone Placidi
- Dipartimento di Chimica Sapienza Università di Roma P.le Aldo Moro 5 00185 Roma Italy
| | - Marco Bella
- Dipartimento di Chimica Sapienza Università di Roma P.le Aldo Moro 5 00185 Roma Italy
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50
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Göricke F, Haseloff S, Laue M, Schneider M, Brumme T, Schneider C. Phosphoric Acid Catalyzed Formation of Hydrogen-Bonded o-Quinone Methides. Enantioselective Cycloaddition with β-Dicarbonyl Compounds toward Benzannulated Oxygen Heterocycles. J Org Chem 2020; 85:11699-11720. [DOI: 10.1021/acs.joc.0c01375] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Fabian Göricke
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Stefan Haseloff
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Michael Laue
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Maximilian Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
| | - Thomas Brumme
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Linnéstraße 2, 04103 Leipzig, Germany
- Theoretische Chemie, Technische Universität Dresden, Bergstraße 66c, 01062 Dresden, Germany
| | - Christoph Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany
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