1
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Meng X, Zhang Q, Lang X, Zhang E, Liu Y, Cao Z. Tandem Four-Component Reaction to Access Fused Polycycles Exhibiting Aggregation-Enhanced Through-Space Charge Transfer Emission. Chemistry 2024; 30:e202400998. [PMID: 38780029 DOI: 10.1002/chem.202400998] [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: 03/11/2024] [Revised: 04/23/2024] [Accepted: 05/21/2024] [Indexed: 05/25/2024]
Abstract
Rapid construction of new fluorescence emitters is essential in advancing synthetic luminescent materials. This study illustrated a piperidine-promoted reaction of chiral dialdehyde with benzoylacetonitrile and malonitrile, leading to the formation of the 6/6/7 fused cyclic product in good yield. The proposed reaction mechanism involves a dual condensation/cyclization process, achieving the formation of up to six bonds for fused polycycles. The single crystal structure analysis revealed that the fused cyclic skeleton contains face-to-face naphthyl and cyanoalkenyl motifs, which act as the electronic donor and acceptor, respectively, potentially resulting in through-space charge transfer (TSCT) emission. While the TSCT emissions were weak in solution, a notable increase in luminescence intensity was observed upon aggregation, indicating bright fluorescent light. A series of theoretical analyses further supported the possibility of spatial electronic communication based on frontier molecular orbitals, the distance of charge transfer, and reduced density gradient analysis. This work not only provides guidance for the one-step synthesis of complex polycycles, but also offers valuable insights into the design of aggregation-enhanced TSCT emission materials.
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Affiliation(s)
- Xin Meng
- Shandong Key Laboratory of Life-Organic Analysis and School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
| | - Qing Zhang
- Shandong Key Laboratory of Life-Organic Analysis and School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
| | - Xuteng Lang
- Shandong Key Laboratory of Life-Organic Analysis and School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
| | - Ensheng Zhang
- Shandong Key Laboratory of Life-Organic Analysis and School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
| | - Yilin Liu
- Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Institute of Organic Synthesis, Huaihua University, Huaihua, Hunan, 418000, P. R. China
| | - Ziping Cao
- Shandong Key Laboratory of Life-Organic Analysis and School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, 273165, P. R. China
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2
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Ma J, Qi S, Yan G, Kirillov AM, Yang L, Fang R. DFT Study on the Mechanisms and Selectivities in Rh (III)-Catalyzed [5 + 1] Annulation of 2-Alkenylanilides and 2-Alkylphenols with Allenyl Acetates. J Org Chem 2024; 89:8562-8577. [PMID: 38847049 DOI: 10.1021/acs.joc.4c00517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
The mechanisms and regio-, chemo-, and stereoselectivity were theoretically investigated in the Rh(III)-catalyzed [5 + 1] annulation of 2-alkenylanilides and 2-alkylphenols with allenyl acetates. Two different reactants, 2-alkenylanilides and 2-alkylphenols, were selected as model systems in the density functional theory calculations. The obtained theoretical results show that both these reactants exhibit similar steps, namely, (1) N-H/O-H deprotonation and C-H activation, (2) allenyl acetate migratory insertion, (3) β-oxygen elimination, (4) intramolecular nucleophilic addition of the nitrogen/oxygen-rhodium bond resulting in [5 + 1]-annulation, and (5) protonation with the formation of the desired product and regeneration of the Rh(III) catalyst. The theoretical evidence suggests that the selectivity is determined at the step of allenyl acetate's migratory insertion. Moreover, the regioselectivity is driven by electronic effects, while the interaction energies (C-H···π and C-H···O interactions) play a more imperative role in controlling the stereoselectivity. The obtained theoretical results not only well rationalize the experimental observations but also provide important mechanistic insights for related types of [5 + 1]-annulation reactions.
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Affiliation(s)
- Ji Ma
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Simeng Qi
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Guowei Yan
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Alexander M Kirillov
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal
| | - Lizi Yang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Ran Fang
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
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3
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Shu J, Wang Y, Guo W, Liu T, Cai S, Shi T, Hu W. Carbenoid-involved reactions integrated with scaffold-based screening generates a Nav1.7 inhibitor. Commun Chem 2024; 7:135. [PMID: 38866907 PMCID: PMC11169417 DOI: 10.1038/s42004-024-01213-3] [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: 11/21/2023] [Accepted: 05/30/2024] [Indexed: 06/14/2024] Open
Abstract
The discovery of selective Nav1.7 inhibitors is a promising approach for developing anti-nociceptive drugs. In this study, we present a novel oxindole-based readily accessible library (OREAL), which is characterized by readily accessibility, unique chemical space, ideal drug-like properties, and structural diversity. We used a scaffold-based approach to screen the OREAL and discovered compound C4 as a potent Nav1.7 inhibitor. The bioactivity characterization of C4 reveals that it is a selective Nav1.7 inhibitor and effectively reverses Paclitaxel-induced neuropathic pain (PINP) in rodent models. Preliminary toxicology study shows C4 is negative to hERG. The consistent results of molecular docking and molecular simulations further support the reasonability of the in-silico screening and show the insight of the binding mode of C4. Our discovery of C4 paves the way for pushing the Nav1.7-based anti-nociceptive drugs forward to the clinic.
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Affiliation(s)
- Jirong Shu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yuwei Wang
- Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Weijie Guo
- Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Tao Liu
- Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Song Cai
- Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Taoda Shi
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China.
| | - Wenhao Hu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
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4
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Wang ZH, Fu XH, Li Q, You Y, Yang L, Zhao JQ, Zhang YP, Yuan WC. Recent Advances in the Domino Annulation Reaction of Quinone Imines. Molecules 2024; 29:2481. [PMID: 38893357 PMCID: PMC11173866 DOI: 10.3390/molecules29112481] [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: 04/01/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 06/21/2024] Open
Abstract
Quinone imines are important derivatives of quinones with a wide range of applications in organic synthesis and the pharmaceutical industry. The attack of nucleophilic reagents on quinone imines tends to lead to aromatization of the quinone skeleton, resulting in both the high reactivity and the unique reactivity of quinone imines. The extreme value of quinone imines in the construction of nitrogen- or oxygen-containing heterocycles has attracted widespread attention, and remarkable advances have been reported recently. This review provides an overview of the application of quinone imines in the synthesis of cyclic compounds via the domino annulation reaction.
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Affiliation(s)
- Zhen-Hua Wang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Xiao-Hui Fu
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Qun Li
- School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 611730, China;
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Yong You
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Lei Yang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Jian-Qiang Zhao
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Yan-Ping Zhang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Wei-Cheng Yuan
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
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5
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Zhu Z, Hu Q, Fu Y, Tong Y, Zhou Z. Design and Evolution of an Enzyme for the Asymmetric Michael Addition of Cyclic Ketones to Nitroolefins by Enamine Catalysis. Angew Chem Int Ed Engl 2024:e202404312. [PMID: 38783596 DOI: 10.1002/anie.202404312] [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: 03/02/2024] [Revised: 05/01/2024] [Accepted: 05/23/2024] [Indexed: 05/25/2024]
Abstract
Consistent introduction of novel enzymes is required for developing efficient biocatalysts for challenging biotransformations. Absorbing catalytic modes from organocatalysis may be fruitful for designing new-to-nature enzymes with novel functions. Herein we report a newly designed artificial enzyme harboring a catalytic pyrrolidine residue that catalyzes the asymmetric Michael addition of cyclic ketones to nitroolefins through enamine activation with high efficiency. Diverse chiral γ-nitro cyclic ketones with two stereocenters were efficiently prepared with excellent stereoselectivity (up to 97 % e.e., >20 : 1 d.r.) and good yield (up to 86 %). This work provides an efficient biocatalytic strategy for cyclic ketone functionalization, and highlights the usefulness of artificial enzymes for extending biocatalysis to further non-natural reactions.
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Affiliation(s)
- Zhixi Zhu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
| | - Qinru Hu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
| | - Yi Fu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
| | - Yingjia Tong
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
| | - Zhi Zhou
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi, 214122, China
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6
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Ohmatsu K, Truong DA, Morita S, Maruoka K, Ooi T. Catalytic 1,1-Cyanoalkylation of Electron-Deficient Olefins. Org Lett 2024; 26:4055-4058. [PMID: 38695395 DOI: 10.1021/acs.orglett.4c00866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
A catalytic 1,1-dicarbofunctionalization of electron-deficient olefins was effected on the basis of the three-component coupling reactions involving olefins bearing vicinal electron-withdrawing groups, potassium cyanide, and an alkyl halide, which afforded geminally cyanoalkylated products in high yields via conjugate cyanation, 1,2-proton transfer, and enolate alkylation. The use of suitable chiral phase-transfer catalysts enabled asymmetric induction in this transformation.
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Affiliation(s)
- Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Duc An Truong
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Shohei Morita
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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7
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Jiang D, Yan S, Wen L, Fan F. Access to Functionalized Cyclohex-2-enones from a Multicomponent Cascade Reaction of Readily Available Alkynes, Ketones, and Ethyl Acetoacetate. J Org Chem 2024; 89:5857-5860. [PMID: 38566575 DOI: 10.1021/acs.joc.3c02913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The synthesis of cyclohex-2-enone derivatives is a topic of current interest in organic chemistry. A novel three-component cascade reaction of alkynes with ketones and ethyl acetoacetate has been uncovered. This process provides di- and trisubstituted cyclohex-2-enones in good yields with excellent functional group tolerance. A variety of terminal alkynes and a wide range of aryl, alkyl, and cyclic ketones are viable in this transformation. Successful scale-up preparation and synthetic transformations have demonstrated the potential of this simple operating protocol.
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Affiliation(s)
- Dahong Jiang
- School of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525011, China
| | - Simin Yan
- School of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525011, China
| | - Liting Wen
- School of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525011, China
| | - Fang Fan
- School of Biology and Food Engineering, Guangdong University of Petrochemical Technology, Maoming 525011, China
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8
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Mori N, Tachibana T, Umekubo N, Hayashi Y. Organocatalyst-mediated asymmetric one-pot/two domino/three-component coupling reactions for the synthesis of trans-hydrindanes. Chem Sci 2024; 15:5627-5632. [PMID: 38638214 PMCID: PMC11023028 DOI: 10.1039/d4sc00193a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 03/02/2024] [Indexed: 04/20/2024] Open
Abstract
Highly substituted trans-hydrindanes were synthesized by the three-component coupling reactions of 1,3-diethyl 2-(2-oxopropylidene)propanedioate and two different α,β-unsaturated aldehydes catalyzed by diphenylprolinol silyl ether. The reaction proceeds via two successive independent catalytic domino reactions in a one-pot reaction by a single chiral catalyst. Domino reactions involve Michael/Michael and Michael/aldol reactions to afford trans-hydrindanes with excellent diastereoselectivity and nearly optically pure form.
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Affiliation(s)
- Naoki Mori
- Department of Chemistry, Graduate School of Science, Tohoku University Sendai 980-8578 Japan
| | - Toshiki Tachibana
- Department of Chemistry, Graduate School of Science, Tohoku University Sendai 980-8578 Japan
| | - Nariyoshi Umekubo
- Department of Chemistry, Graduate School of Science, Tohoku University Sendai 980-8578 Japan
| | - Yujiro Hayashi
- Department of Chemistry, Graduate School of Science, Tohoku University Sendai 980-8578 Japan
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9
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Nan J, Xiao H, Ma Y, Fan L, Wang J. Palladium-Catalyzed Domino Conversion of Aryl-Thianthreniums with Anhydrides: Rapidly Building Highly Functionalized Fluorenones. Org Lett 2024. [PMID: 38619225 DOI: 10.1021/acs.orglett.4c00302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
As a class of rising electrophilic coupling reagents, aryl-thianthreniums (aryl-TTs) have been gaining immense attention. Herein, a novel palladium-catalyzed domino annulation of aryl-TTs with anhydrides is proposed to rapidly assemble a collection of highly functionalized fluorenones. This finding presents an innovative reaction pattern of aryl-TTs wherein the domino annulation version is first involved. Heavily compared with the existing conversions with aryl-TTs, this identified process successively functions as four aryl C-H bonds.
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Affiliation(s)
- Jiang Nan
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
- Xi'an Key Laboratory of Antiviral and Antimicrobial-Resistant Bacteria Therapeutics Research, School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Haiyan Xiao
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yangmin Ma
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Liangxin Fan
- College of Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Jing Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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10
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Cui Y, Xu W, Yang W, Meng F. Access to CF 2COR-Containing Quinazolinones via Visible-Light-Induced Domino Difluoroalkylation/Cyclization of N-Cyanamide Alkenes. Org Lett 2024; 26:2119-2123. [PMID: 38436251 DOI: 10.1021/acs.orglett.4c00457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
A green and highly efficient visible-light-induced radical cascade difluoroalkylation/cyclization reaction of N-cyanamide alkenes has been developed. A variety of CF2COR-containing quinazolinones have been obtained in high yields with cheap non-metallic 4CzIPN as the photocatalyst. This photocatalytic reaction provides rapid, facile, and practical access to valuable polycyclic quinazolinone, and it is amenable to the gram scale.
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Affiliation(s)
- Yangyang Cui
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Wen Xu
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Wenchao Yang
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Fei Meng
- Institute of Pesticide, College of Plant Protection, Yangzhou University, Yangzhou 225009, China
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11
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Majeed A, Ibrahim AH, Al-Rawi SS, Iqbal MA, Kashif M, Yousif M, Abidin ZU, Ali S, Arbaz M, Hussain SA. Green Organo-Photooxidative Method for the Degradation of Methylene Blue Dye. ACS OMEGA 2024; 9:12069-12083. [PMID: 38496983 PMCID: PMC10938592 DOI: 10.1021/acsomega.3c09989] [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: 12/14/2023] [Revised: 02/06/2024] [Accepted: 02/13/2024] [Indexed: 03/19/2024]
Abstract
This study used an organophoto-oxidative material to degrade the toxic azo dye, methylene blue (MB), due to its hazardous effects on aquatic life and humans. MB is traditionally degraded using metal-based catalysts, resulting in high costs. Several organic acids were screened for organo-photooxidative applications against various azo dyes, and ascorbic acid (AA), also known as vitamin C, was found to be best for degradation due to its high photooxidative activity. It is an eco-friendly, edible, and efficient photooxidative material. A photocatalytic box has been developed for the study of organo-photooxidative activity. It was found that when AA was added, degradation efficiency increased from 42 to 95% within 240 min. Different characterization techniques, such as HPLC and GC-MS, were used after degradation for the structural elucidation of degraded products. DFT study was done for the investigation of the mechanistic study behind the degradation process. A statistical tool, RSM, was used for the optimization of parameters (concentration of dye, catalyst, and time). This study develops sustainable and effective solutions for wastewater treatment.
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Affiliation(s)
- Adnan Majeed
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
| | - Ahmad H. Ibrahim
- Pharmacy
Department, Faculty of Pharmacy, Tishk International
University, 100Mt. St, Near Baz Intersection, Erbil, KRG, Iraq
| | - Sawsan S. Al-Rawi
- Biology
Education Department, Faculty of Education, Tishk International University, 100Mt. St, Near Baz Intersection, Erbil, KRG, Iraq
| | - Muhammad Adnan Iqbal
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
- Synthetic
Organometallic and Coordination Chemistry Laboratory, University of Agriculture Faisalabad, Faisalabad38000, Pakistan
| | - Muhammad Kashif
- Department
of Mathematics and Statistics, University
of Agriculture Faisalabad, Faisalabad38000, Pakistan
| | - Muhammad Yousif
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
| | - Zain Ul Abidin
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
| | - Shahzaib Ali
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
| | - Muhammad Arbaz
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
| | - Syed Arslan Hussain
- Department
of Chemistry, University of Agriculture
Faisalabad, Faisalabad38000, Pakistan
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12
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Chen L, Wang D. A Tunable Cascade Reaction of Ureidomalonates and Alkenyl Azlactones for the Divergent Synthesis of Hydantoins with Distinct Functional Groups. J Org Chem 2024; 89:3365-3382. [PMID: 38363598 DOI: 10.1021/acs.joc.3c02814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
A tunable cascade reaction of ureidomalonates and alkenyl azlactones was disclosed, which gave rise to the construction of N-aroyl α-amino acid ester and imide-functionalized hydantoins in moderate to good yields and with excellent diastereoselectivities. The reaction pathway was precisely manipulated by organocatalysis and phase-transfer/sunlight relay catalysis, respectively, to realize the divergent synthesis. The successful gram-scale preparation of representative products exhibited the application potential of this protocol. Mechanistic studies indicated that the exchange and phase transfer of ethoxy anion played a key role in altering the reaction pathway, and sunlight might accelerate the oxidation process at the late stage of the reaction triggered by phase-transfer catalysis.
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Affiliation(s)
- Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. China
| | - Di Wang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. China
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13
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Ramkumar R, Srikriya S, Anbarasan P. Copper(I)-Catalyzed Tandem Aminobenzannulation of Dienyne with Sulfonyl Azide. J Org Chem 2024; 89:3292-3303. [PMID: 38373699 DOI: 10.1021/acs.joc.3c02742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
A general and efficient copper-catalyzed tandem aminobenzannulation of dienyne has been accomplished employing sulfonyl azides as a coupling partner. The reaction involves the formation of both C-C and C-N bonds via the initial generation of copper-catalyzed ketenimine from terminal alkyne and sulfonyl azide followed by electrocyclic ring closure and aromatization. The developed reaction is operationally simple and allows the synthesis of diverse substituted aminonaphthalenes and fused aminoarenes in good to excellent yields with high selectivities.
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Affiliation(s)
- Rajagopal Ramkumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Subramanian Srikriya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Pazhamalai Anbarasan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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14
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Liu X, Zhu B, Zhang X, Zhu H, Zhang J, Chu A, Wang F, Wang R. Enantioselective synthesis of [4]helicenes by organocatalyzed intermolecular C-H amination. Nat Commun 2024; 15:732. [PMID: 38272928 PMCID: PMC10810882 DOI: 10.1038/s41467-024-45049-w] [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: 07/18/2023] [Accepted: 01/12/2024] [Indexed: 01/27/2024] Open
Abstract
Catalytic asymmetric synthesis of helically chiral molecules has remained an outstanding challenge and witnessed fairly limited progress in the past decades. Current methods to construct such compounds almost entirely rely on catalytic enantiocontrolled fused-ring system extension. Herein, we report a direct terminal peri-functionalization strategy, which allows for efficient assembling of 1,12-disubstituted [4]carbohelicenes via an organocatalyzed enantioselective amination reaction of 2-hydroxybenzo[c]phenanthrene derivates with diazodicarboxamides. The key feature of this approach is that the stereochemical information of the catalyst could be transferred into not only the helix sense but also the remote C-N axial chirality of the products, thus enabling the synthesis of [4]- and [5]helicenes with both structural diversity and stereochemical complexity in good efficiency and excellent enantiocontrol. Besides, the large-scale preparations and representative transformations of the helical products further demonstrate the practicality of this protocol. Moreover, DFT calculations reveal that both the hydrogen bonds and the C-H---π interactions between the substrates and catalyst contribute to the ideal stereochemical control.
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Affiliation(s)
- Xihong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China.
| | - Boyan Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Xiaoyong Zhang
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, 518107, Shenzhen, China
| | - Hanwen Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Jingying Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Anqi Chu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Fujun Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China.
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15
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Zhang H, Wen W, Lu ZX, Wu ZL, Cai T, Guo QX. Core Structure-Oriented Asymmetric α-Allenylic Alkylation of Amino Acid Esters Enabled by Chiral Aldehyde/Palladium Catalysis. Org Lett 2024; 26:153-159. [PMID: 38133484 DOI: 10.1021/acs.orglett.3c03762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Aiming at the reported chiral synthons leading to manzacidins A and D, here we report a highly efficient catalytic asymmetric α-allenylic alkylation reaction of NH2-unprotected amino acid esters that is promoted by combined chiral aldehyde/palladium catalysis. Fifty examples of unnatural α,α-disubstituted amino acid esters are reported with good-to-excellent yields and stereoselectivities. Based on this methodology, a key intermediate leading to manzacidin C and its other three stereoisomers is prepared accordingly.
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Affiliation(s)
- Hao Zhang
- Key Laboratory of Applied Chemistry of Chongqing Municipality and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Ze-Xi Lu
- Key Laboratory of Applied Chemistry of Chongqing Municipality and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhu-Lian Wu
- Key Laboratory of Applied Chemistry of Chongqing Municipality and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Tian Cai
- Key Laboratory of Applied Chemistry of Chongqing Municipality and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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16
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Liang Z, Yu Y, Zhang L, Xue G, Liu M, Zhang Y, Huang M, Cai L, Cai S. Visible-Light-Enabled Catalytic Approach to N, O-Spirocycles through Amidyl Radical Addition/Cyclization. Org Lett 2024; 26:298-303. [PMID: 38153355 DOI: 10.1021/acs.orglett.3c03855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
A rational combination of photoredox catalyst anthraquinone and hydrogen atom transfer (HAT) catalyst methyl thioglycolate allows for the rapid and straightforward conversion of a range of 2-amidated acetylenic alcohols to multifunctional N,O-spirocycles under visible light irradiation. With oxygen as the sole terminal oxidant, these reactions can be carried out efficiently at room temperature without the involvement of transition metals or strong oxidants. The successful application of this mild catalytic strategy in the late-stage functionalization of bioactive skeletons further highlights its practical value.
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Affiliation(s)
- Zhihui Liang
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Yushen Yu
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Lele Zhang
- Key Laboratory of Chemical Genomics of Guangdong Province, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Guotao Xue
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Min Liu
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Yirui Zhang
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Mingqiang Huang
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Lina Cai
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
| | - Shunyou Cai
- Key Laboratory of Modern Analytical Science and Separation Technology of Fujian Province, School of Chemistry Chemical Engineering, and Environment, Minnan Normal University, Zhangzhou 363000, China
- Key Laboratory of Chemical Genomics of Guangdong Province, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
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17
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Zhuang QB, Tian JR, Lu K, Zhang XM, Zhang FM, Tu YQ, Fan R, Li ZH, Zhang YD. Catalytic Asymmetric Polycyclization of Tertiary Enamides with Silyl Enol Ethers: Total Synthesis of (-)-Cephalocyclidin A. J Am Chem Soc 2023. [PMID: 38019148 DOI: 10.1021/jacs.3c11178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
A catalytic enantioselective polycyclization of tertiary enamides with terminal silyl enol ethers has been developed by virtue of Cu(OTf)2 catalysis with a novel spiropyrroline-derived oxazole (SPDO) ligand. This tandem reaction offers an effective approach to assemble bicyclic and tricyclic N-heterocycles bearing both aza- and oxa-quaternary stereogenic centers, which are primal subunits in a range of natural alkaloids. Strategic application of this methodology and a late-stage radical cyclization as key steps have been showcased in the concise total synthesis of (-)-cephalocyclidin A.
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Affiliation(s)
- Qing-Bo Zhuang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jin-Rui Tian
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Ka Lu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- School of Chemistry and Chemical Engineering, Frontier Scientific Center of Transformative Molecules, Shanghai Key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai Minhang 200240, China
| | - Rong Fan
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Hao Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yu-Dong Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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18
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Chen J, Yang X, Huang Y, Zheng Z, Li T. The Development of Aldehyde Catalytic System. Chem Asian J 2023; 18:e202300731. [PMID: 37755436 DOI: 10.1002/asia.202300731] [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: 08/21/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 09/28/2023]
Abstract
Aldehyde catalysts have proven to be highly effective in facilitating and accelerating a wide range of challenging transformations in organic chemistry. This article is structured into three main sections, focusing on the utilization of aldehydes as organocatalysts, the aldehydes/transition metals catalytic systems, and photochemical initiators. Finally, we provide a concise summary of the advancements in this fascinating research field, offering our perspectives and insights.
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Affiliation(s)
- Jinli Chen
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Xiaoqun Yang
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Yixian Huang
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Zhiguo Zheng
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Tingting Li
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
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19
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Xu L, Zhou L, Li YX, Gao RT, Chen Z, Liu N, Wu ZQ. Thermo-responsive chiral micelles as recyclable organocatalyst for asymmetric Rauhut-Currier reaction in water. Nat Commun 2023; 14:7287. [PMID: 37949865 PMCID: PMC10638429 DOI: 10.1038/s41467-023-43092-7] [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: 11/16/2022] [Accepted: 10/31/2023] [Indexed: 11/12/2023] Open
Abstract
Developing eco-friendly chiral organocatalysts with the combined advantages of homogeneous catalysis and heterogeneous processes is greatly desired. In this work, a family of amphiphilic one-handed helical polyisocyanides bearing phosphine pendants is prepared, which self-assembles into well-defined chiral micelles in water and showed thermo-responsiveness with a cloud point of approximately 38.4 °C. The micelles with abundant phosphine moieties at the interior efficiently catalyze asymmetric cross Rauhut-Currier reaction in water. Various water-insoluble substrates are transferred to target products in high yield with excellent enantioselectivity. The yield and enantiomeric excess (ee) of the product generated in water are up to 90% and 96%, respectively. Meanwhile, the yields of the same R-C reaction catalyzed by the polymer itself in organic solvents is <16%, with an ee < 72%. The homogeneous reaction of the chiral micelles in water turns to heterogeneous at temperatures higher than the cloud point, and the catalyst precipitation facilitates product isolation and catalyst recovery. The polymer catalyst is recycled 10 times while maintaining activity and enantioselectivity.
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Affiliation(s)
- Lei Xu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei Normal University, 235000, Huaibei, Anhui, China
| | - Li Zhou
- Department of Polymer Science and Engineering, Hefei University of Technology, 230009, Hefei, China
| | - Yan-Xiang Li
- Department of Polymer Science and Engineering, Hefei University of Technology, 230009, Hefei, China
| | - Run-Tan Gao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China
| | - Zheng Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China
| | - Na Liu
- The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, 130021, Changchun, Jilin, China
| | - Zong-Quan Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China.
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20
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Qiu YF, Cao JH, Wang S, Wang Q, Li M, Wang JJ, Quan ZJ, Wang XC. Synthesis of 3(2 H)-furanone derivatives: p-TsOH/halotrimethylsilane promoted cycloketonization of γ-hydroxyl ynones. Org Biomol Chem 2023; 21:8744-8748. [PMID: 37873567 DOI: 10.1039/d3ob01500a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
A p-TsOH/halotrimethylsilane facilitated cycloketonization of γ-hydroxyl ynones is detailed. This methodology enables the one-step synthesis of polysubstituted 3(2H)-furanone products. It is remarkable that the reaction exhibits excellent regio- and chemoselectivity by the addition of very small quantities of p-toluenesulfonic acid and water.
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Affiliation(s)
- Yi-Feng Qiu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Jian-He Cao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Shutao Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Qiang Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Ming Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Jun-Jiao Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Zheng-Jun Quan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
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21
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Sharma M, Tamanna, Chauhan P. Asymmetric Synthesis of Hydrophenanthrenones Bearing Multiple Stereogenic Centers via Squaramide-Catalyzed Domino 1,4-/1,4-Addition Desymmetrization Sequence. Org Lett 2023; 25:7911-7916. [PMID: 37882793 DOI: 10.1021/acs.orglett.3c03167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
An unprecedented stereoselective route for procuring tetrahydrophenanthren-2(1H)-ones bearing up to five contiguous stereogenic centers has been accomplished. A bifunctional squaramide enables a domino 1,4-/1,4-addition desymmetrization reaction sequence between the newly developed β-nitrostyrene-tethered 2,5-cyclohexadienones and trisubstituted enolizable nucleophiles to provide direct access to the polyfunctionalized hydrophenanthren-2(1H)-ones in excellent enantio- (up to >99%) and diastereoselectivity (up to >20:1). By using a psedoenantiomeric squaramide, the enantiomers of hydrophenanthrene derivatives were also accessed with excellent stereocontrol.
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Affiliation(s)
- Manisha Sharma
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, Nagrota Bypass, Jammu, 181221 Jammu and Kashmir, India
| | - Tamanna
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, Nagrota Bypass, Jammu, 181221 Jammu and Kashmir, India
| | - Pankaj Chauhan
- Department of Chemistry, Indian Institute of Technology Jammu, NH-44, Nagrota Bypass, Jammu, 181221 Jammu and Kashmir, India
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22
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Midya A, Khalse LD, Ghorai P. Organocatalytic Enantioselective Intramolecular Michael Addition by In Situ Generated Aminoisobenzofulvenes: Construction of Spiro Quaternary Carbon Stereocenters. Chemistry 2023; 29:e202301563. [PMID: 37545475 DOI: 10.1002/chem.202301563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/28/2023] [Accepted: 08/05/2023] [Indexed: 08/08/2023]
Abstract
An unprecedented enantioselective organocatalytic spirocyclization strategy is presented by in situ generation of aminoisobezofulvenes. The reaction sequence involves a reductive Michael/aldol-condensation/Michael addition cascade by iminium-enamine catalysis. The key success of this spirocyclization was the formation of intermediatory nucleophilic aminoisobenzofuvenes accountable for intramolecular Michael addition. Benzospirononanes featuring an all carbon qauternary spirocenter were obtained using proline-derived amino-organocatalyst in moderate to good yields and excellent diastereo- and enantioselectivities (up to >20 : 1 dr, and 99 % ee). Post-methodological manipulation of benzospirononanes was also demonstrated.
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Affiliation(s)
- Abhisek Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, India
| | - Laxman Devidas Khalse
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, India
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23
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Gayyur, Choudhary S, Kant R, Ghosh N. Twofold Heteroannulation Reactions Enabled by Gold(I)/Zinc(II) Catalysts: Synthesis of Amine-Substituted Diaryl[ c, h][1,6]naphthyridines. Org Lett 2023; 25:7400-7405. [PMID: 37787541 DOI: 10.1021/acs.orglett.3c02899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
A straightforward and atom-economical one-pot protocol catalyzed by gold(I) and zinc(II) for the synthesis of amine-substituted diaryl[c,h][1,6]naphthyridines from two different aromatic nitriles has been showcased. This dual-catalytic strategy is highly efficient, offering an array of tetracyclic heteroaromatic products in good to excellent yields. Furthermore, the base can efficiently catalyze the second annulation step, yielding structurally unique thiophene-fused [1,6]naphthyridines in good yields.
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Affiliation(s)
- Gayyur
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Shivani Choudhary
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ruchir Kant
- Biochemistry and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Nayan Ghosh
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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24
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Wang A, Yin YY, Rukhsana, Wang LQ, Jin JH, Shen YM. Visible-Light-Mediated Three-Component Decarboxylative Coupling Reactions to Synthesize 1,4-Diol Monoethers. J Org Chem 2023; 88:13871-13882. [PMID: 37683099 DOI: 10.1021/acs.joc.3c01483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
An efficient approach for 1,2-difunctionalization of aromatic olefins and the synthesis of functionalized 1,4-diols monoethers has been established via a photoinduced three-component reaction of an α-alkoxycarboxylic acid, an aromatic olefin, and an aldehyde. The reaction proceeds by photoinduced oxidative decarboxylation of the carboxylic acid followed by the addition of the α-alkoxyalkyl radical to the olefin, one-electron reduction of the addition radical, and the nucleophilic attack of the resulting carbanion to the aldehyde. Besides the convenient one-pot protocol of the three-component reaction, this method offers several other advantages, including good functional group tolerance for the three substrates, gentle reaction conditions, and ease of scaling up. The reaction mechanism has been investigated through free radical trapping experiment and isotope labeling experiments.
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Affiliation(s)
- Ai Wang
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
| | - Yu-Yun Yin
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
- Zhejiang Sci-Tech University Shengzhou Innovation Research Institute, Shengzhou 312400, P.R. China
| | - Rukhsana
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
| | - Le-Quan Wang
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
| | - Jia-Hui Jin
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
| | - Yong-Miao Shen
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P.R. China
- Zhejiang Sci-Tech University Shengzhou Innovation Research Institute, Shengzhou 312400, P.R. China
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25
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Brusa A, Iapadre D, Casacchia ME, Carioscia A, Giorgianni G, Magagnano G, Pesciaioli F, Carlone A. Acetaldehyde in the Enders triple cascade reaction via acetaldehyde dimethyl acetal. Beilstein J Org Chem 2023; 19:1243-1250. [PMID: 37674523 PMCID: PMC10477997 DOI: 10.3762/bjoc.19.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/09/2023] [Indexed: 09/08/2023] Open
Abstract
Asymmetric organocatalyzed multicomponent reactions represent an important toolbox in the field of organic synthesis to build complex scaffolds starting from simple starting materials. The Enders three-component cascade reaction was a cornerstone in the field and a plethora of organocatalyzed cascade reactions followed. However, acetaldehyde was not shown as a successful reaction partner, probably because of its high reactivity. Herein, we report the Enders-type cascade reaction using acetaldehyde dimethyl acetal, as a masked form of acetaldehyde. This strategy directly converts acetaldehyde, nitroalkenes and enals into stereochemically dense cyclohexenals in good yield and excellent enantioselectivity.
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Affiliation(s)
- Alessandro Brusa
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
| | - Debora Iapadre
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
| | - Maria Edith Casacchia
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
- IUSS Scuola Universitaria Superiore di Pavia, Palazzo del Broletto, Piazza della Vittoria, 15, 27100, Pavia, Italy
| | - Alessio Carioscia
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
| | - Giuliana Giorgianni
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
| | - Giandomenico Magagnano
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
| | - Fabio Pesciaioli
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
| | - Armando Carlone
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, via Vetoio, 67100, L’Aquila, Italy
- INSTM, Consorzio Nazionale per la Scienza e Tecnologia dei Materiali, RU L’Aquila, Italy
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26
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G M, Sharma D, Dandela R, Dhayalan V. Synthetic Strategies of N-Heterocyclic Olefin (NHOs) and Their Recent Application of Organocatalytic Reactions and Beyond. Chemistry 2023:e202302106. [PMID: 37605950 DOI: 10.1002/chem.202302106] [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: 07/03/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 08/23/2023]
Abstract
N-heterocyclic olefin (NHO) derivatives have an electron-rich as well as highly polarized carabon-carbon (C=C) double bond because of the electron-donating nature of nitrogen and sulphur atoms. While NHOs have been developing as novel organocatalysts and ligands for transition-metal complexes in various organic compound syntheses, different research groups are currently interested in preparing imidazole and triazolium-based chiral NHO catalysts. Some of them have been used for enantioselective organic transformations, but were still elusive. N-heterocyclic olefins, the alkylidene derivatives of N-heterocyclic carbenes (NHC), have shown promising results as effective promoters for numerous organic syntheses such as asymmetric catalysis, hydroborylation, hydrosilylation, reduction, CO2 sequestration, alkylation, cycloaddition, polymerization and the ring-opening reaction of aziridine and epoxides, esterification, C-F bond functionalization, amine coupling, trifluoromethyl thiolation, amination etc. NHOs catalysts with suitable structures can serve as a novel class of Lewis/Bronsted bases with strong basicity and high nucleophilicity properties.These facts strongly suggest their enormous chemical potential as sustainable catalysts for a wide variety of reactions in synthetic chemistry. The synthesis of NHOs and their properties are briefly reviewed in this article, along with a summary of the imidazole and triazole core of NHOs' most recent catalytic uses.
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Affiliation(s)
- Mahantesh G
- Department of Chemistry, National Institute of Technology Puducherry, Karaikal, 609609, Union Territory Puducherry, India
| | - Deepika Sharma
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Indian oil Odisha Campus, IIT, Kharagpur extension Centre Mouza Samantpuri, Bhubaneswar, 751013, Odisha, India
| | - Rambabu Dandela
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Indian oil Odisha Campus, IIT, Kharagpur extension Centre Mouza Samantpuri, Bhubaneswar, 751013, Odisha, India
| | - Vasudevan Dhayalan
- Department of Chemistry, National Institute of Technology Puducherry, Karaikal, 609609, Union Territory Puducherry, India
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27
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Rajput D, Jan G, Karuppasamy M, Bhuvanesh N, Nagarajan S, Maheswari CU, Menéndez JC, Sridharan V. Rapid Assembly of Functionalized 2 H-Chromenes and 1,2-Dihydroquinolines via Microwave-Assisted Secondary Amine-Catalyzed Cascade Annulation of 2- O/ N-Propargylarylaldehydes with 2,6-Dialkylphenols. J Org Chem 2023; 88:11778-11792. [PMID: 37556760 DOI: 10.1021/acs.joc.3c01082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
An efficient, secondary amine-catalyzed cascade annulation of 2-O/N-propargylarylaldehydes with 2,6-dialkylphenols was established to access biologically relevant functionalized 2H-chromenes and 1,2-dihydroquinolines tethered with a synthetically useful p-quinone methide scaffold in high yields under microwave irradiation and conventional heating conditions. The microwave-assisted strategy was convenient, clean, rapid, and high yielding in which the reactions were completed in just 15 min, and the yields obtained were up to 95%. This highly atom-economical domino process constructed two new C-C double bonds and a six-membered O/N-heterocyclic ring in a single synthetic operation. Its mechanism process was rationalized as involving sequential iminium ion formation, nucleophilic addition, and intramolecular annulation steps. Furthermore, the synthesized 2H-chromene derivatives were transformed into valuable indeno[2,1-c]chromenes, 5H-indeno[2,1-c]quinolines, and oxireno[2,3-c]chromene via a palladium-catalyzed double C-H bond activation process and epoxidation, respectively.
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Affiliation(s)
- Diksha Rajput
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Gowsia Jan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Muthu Karuppasamy
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Subbiah Nagarajan
- Department of Chemistry, National Institute of Technology, Warangal, Warangal 506004, Telangana, India
| | - C Uma Maheswari
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - J Carlos Menéndez
- Unidad de Química Orgánica y Farmacéutica, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
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28
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Nakagawa H, Fuwa H. Au-catalyzed stereodivergent synthesis of 2,5-disubstituted pyrrolidines: total synthesis of (+)-monomorine I and (+)-indolizidine 195B. Chem Commun (Camb) 2023; 59:10121-10124. [PMID: 37483107 DOI: 10.1039/d3cc02453a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Stereodivergent synthesis of 2,5-disubstituted pyrrolidines was achieved via a Au-catalyzed tandem intramolecular alkyne hydroamination/iminium formation/Et3SiH reduction. Importantly, the stereochemical outcome could be switched by choosing an appropriate nitrogen protecting group. Total synthesis of a diastereomeric pair of alkaloid natural products, monomorine I and indolizidine 195B, was achieved to showcase the synthetic utility of the tandem reaction.
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Affiliation(s)
- Hayato Nakagawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
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29
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Li JC, Yan BX, Wang G, Ye ZS. Rhodium-Catalyzed Selective Nucleophilic Cyclization/Cross-Coupling of Two ortho-Alkynylanilines Bearing Differential N-Substituents. Org Lett 2023; 25:5890-5895. [PMID: 37530173 DOI: 10.1021/acs.orglett.3c02180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Herein, we reported an effective selective nucleophilic cyclization/cross-coupling cascade reaction of N-tosyl ortho-alkynylanilines and N-acyl ortho-alkynylanilines using Rh(COD)2BF4/tBuXantPhos as a catalyst. The present protocol features excellent chemo- and regioselectivity, high atom-economy, and a broad range of substrates. The mechanism studies indicated that the key to the success of this reaction is the powerful capacity of the rhodium catalyst to recognize the N-substituent group in the selective nucleophilic cyclization and selective alkyne insertion.
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Affiliation(s)
- Jin-Chen Li
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Bing-Xia Yan
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Gang Wang
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zhi-Shi Ye
- School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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30
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Peshkov AA, Gapanenok D, Puzyk A, Amire N, Novikov AS, Martynova SD, Kalinin S, Dar'in D, Peshkov VA, Krasavin M. Substrate-Controlled Three-Component Synthesis of Diverse Fused Heterocycles. J Org Chem 2023; 88:10508-10524. [PMID: 37459446 DOI: 10.1021/acs.joc.3c00497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
A chemoselective strategy toward a variety of fused heterocyclic scaffolds relying on a three-component condensation of heterocyclic ketene aminals (HKAs) or corresponding thioaminals with aryl glyoxals and cyclic 1,3-dicarbonyl compounds has been developed and explored. Depending on the applied combination of substrates, the strategy can be tuned to provide straightforward access to imidazo[1,2-a]quinoline, pyrrolo[1,2-a]imidazole, and pyrrolo[2,1-b]thiazole frameworks.
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Affiliation(s)
- Anatoly A Peshkov
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
- Nazarbayev University, Department of Chemistry, School of Sciences and Humanities, Nur-Sultan 010000, Kazakhstan
| | - Diana Gapanenok
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Aleksandra Puzyk
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Niyaz Amire
- Nazarbayev University, Department of Chemistry, School of Sciences and Humanities, Nur-Sultan 010000, Kazakhstan
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
- Research Institute of Chemistry, Peoples' Friendship University of Russia (RUDN University), Moscow 117198, Russian Federation
| | - Sofia D Martynova
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Stanislav Kalinin
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Dmitry Dar'in
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
| | - Vsevolod A Peshkov
- Nazarbayev University, Department of Chemistry, School of Sciences and Humanities, Nur-Sultan 010000, Kazakhstan
| | - Mikhail Krasavin
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russian Federation
- Immanuel Kant Baltic Federal University, Kaliningrad 236016, Russian Federation
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31
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Sarkar A, Mistry S, Bhattacharya S, Natarajan S. Multistep Cascade Catalytic Reactions Employing Bifunctional Framework Compounds. Inorg Chem 2023. [PMID: 37393542 DOI: 10.1021/acs.inorgchem.3c01243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Multistep cascade reactions are important to achieve atom as well as step economy over conventional synthesis. This approach, however, is limited due to the incompatibility of the available reactive centers in a catalyst. In the present study, new MOF compounds, [Zn2(SDBA)(3-ATZ)2]·solvent, I and II, with tetrahedral Zn centers as good Lewis acidic sites and the free amino group of the 3-amino triazole ligand as a strong Lewis base center were shown to perform 4-step cascade/tandem reaction in a facile manner. Effective conversion of benzaldehyde dimethyl acetal in the presence of excess nitromethane at 100 °C in water to 1-(1,3-dinitropropan-2-yl) benzene was achieved in 10 h with yields of ∼95% (I) and ∼94% (II). This 4-step cascade reaction proceeds via deacetalization (Lewis acid), Henry (Lewis base), and Michael (Lewis base) reactions. The present work highlights the importance of spatially separated functional groups in multistep tandem catalysis─the examples of which are not common.
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Affiliation(s)
- Anupam Sarkar
- Solid State and Structural Chemistry Unit, Framework Solids Laboratory, Indian Institute of Science, Bangalore 560012, India
| | - Subhradeep Mistry
- Department of Chemistry, Hemvati Nandan Bahuguna Garhwal University, SRT Campus, New Tehri 249199, Uttarakhand, India
| | - Saurav Bhattacharya
- Department of Chemistry, BITS Pilani K. K. Birla Goa Campus, Goa 403726, India
| | - Srinivasan Natarajan
- Solid State and Structural Chemistry Unit, Framework Solids Laboratory, Indian Institute of Science, Bangalore 560012, India
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32
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Giordano MT, Kitzinger KM, de Jesús Cruz P, Liu S, Johnson JS. Catalytic, Asymmetric Michael-Aldol Annulations via a Stereodivergent/Stereoconvergent Path Operating under Curtin-Hammett Control. J Am Chem Soc 2023; 145:12370-12376. [PMID: 37216269 PMCID: PMC10360212 DOI: 10.1021/jacs.3c03373] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A bifunctional iminophosphorane (BIMP)-catalyzed method for the synthesis of densely functionalized cyclohexanols establishes five contiguous stereocenters (diastereoselection up to >20:1, enantioselectivity up to >99:1) in a Michael/aldol domino reaction between trisubstituted electrophilic alkenes and γ-nitroketones. Mechanistic studies suggest a scenario in which stereoconvergency is achieved by kinetically controlled cyclization after the initial diastereodivergent Michael addition. Diastereoconvergency during cyclization is shown to result from Curtin-Hammett kinetics, a finding that contrasts the crystallization-driven stereoconvergency previously reported in similar systems. Despite the change in the stereocontrol mechanism, the operational attributes remain attractive, with the crystalline products typically isolated in analytically pure form upon filtration of the reaction mixture.
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Affiliation(s)
- Mitchell T Giordano
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Katelyn M Kitzinger
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Pedro de Jesús Cruz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Shubin Liu
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
- Research Computing Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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33
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Cai WY, Ding QN, Zhou L, Chen J. Asymmetric Synthesis of Axially Chiral Molecules via Organocatalytic Cycloaddition and Cyclization Reactions. Molecules 2023; 28:molecules28114306. [PMID: 37298781 DOI: 10.3390/molecules28114306] [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: 04/30/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
Atropisomeric molecules are present in many natural products, biologically active compounds, chiral ligands and catalysts. Many elegant methodologies have been developed to access axially chiral molecules. Among them, organocatalytic cycloaddition and cyclization have attracted much attention because they have been widely used in the asymmetric synthesis of biaryl/heterobiaryls atropisomers via construction of carbo- and hetero-cycles. This strategy has undoubtedly become and will continue to be a hot topic in the field of asymmetric synthesis and catalysis. This review aims to highlight the recent advancements in this field of atropisomer synthesis by using different organocatalysts in cycloaddition and cyclization strategies. The construction of each atropisomer, its possible mechanism, the role of catalysts, and its potential applications are illustrated.
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Affiliation(s)
- Wei-Yun Cai
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
| | - Qian-Ni Ding
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China
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34
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Pellissier H. TADDOL-derived phosphorus ligands in asymmetric catalysis. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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35
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Khot NP, Nagtilak PJ, Deo NK, Kapur M. A three component 1,3-difunctionalization of vinyl diazo esters enabled by a cobalt catalyzed C-H activation/carbene migratory insertion. Chem Commun (Camb) 2023; 59:6076-6079. [PMID: 37114935 DOI: 10.1039/d3cc00295k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
We report herein, a modular, regioselective 1,3-oxyarylation of vinyl diazo esters via a Co-catalyzed C-H activation/carbene migratory insertion cascade. The transformation involves the formation of C-C and C-O bonds in a one-pot fashion and displays a broad substrate scope with respect to both, vinyl diazo esters as well as benzamides. The coupled products were subjected to hydrogenation to access elusive allyl alcohol scaffolds. Mechanistic investigations reveal interesting insights on the mode of transformation, involving C-H activation, carbene migratory insertion of the diazo compound followed by a radical addition as the key steps of the transformation.
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Affiliation(s)
- Nandkishor Prakash Khot
- Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462066, Madhya Pradesh, India.
| | - Prajyot Jayadev Nagtilak
- Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462066, Madhya Pradesh, India.
| | - Nitish Kumar Deo
- Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462066, Madhya Pradesh, India.
| | - Manmohan Kapur
- Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462066, Madhya Pradesh, India.
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36
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Gugulothu K, Jatoth R, Edukondalu P, Vanga A, Matta R, Shiva Kumar K. Synthesis of fused bis-indazoles/indazoles via a one-pot sequential strategy. Org Biomol Chem 2023; 21:2816-2821. [PMID: 36924392 DOI: 10.1039/d3ob00121k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
We report here an efficient synthesis of fused bis-indazoles/indazoles via a one-pot sequential strategy starting from o-azido aldehydes and amines. This novel method involves the sequential formation of 2H-indazole followed by a Pd-catalyzed intramolecular cross-dehydrogenative coupling reaction. Overall, this one-pot sequential reaction involved the formation of new five bonds, resulting in the formation of three heterocyclic rings.
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Affiliation(s)
- Kishan Gugulothu
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | - Ramanna Jatoth
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | | | - Anusha Vanga
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | - Raghavender Matta
- Department of Chemistry, Osmania University, Hyderabad-500 007, India
| | - K Shiva Kumar
- Department of Chemistry, Osmania University, Hyderabad-500 007, India.,Department of Chemistry, School of Physical Sciences, Central University of Kerala, Kasaragod, Kerala 671320, India.
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37
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Magham LR, Thopate SB, Samad A, Chegondi R. Enantioselective Desymmetrization Triggered by Iminium-Enamine Activation: Access to Complex Cyclohepta[b]indoles. Chemistry 2023; 29:e202203435. [PMID: 36530064 DOI: 10.1002/chem.202203435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
The expeditious construction of complex molecules having multiple stereocentres is highly desirable in organic chemistry. In the present communication, we report the development of an organocatalytic asymmetric desymmetrization of prochiral enal-tethered cyclohexadienones via the C3-selective Friedel-Crafts alkylation of indoles triggered by LUMO-lowering iminium activation/HOMO-raising enamine activation. The reaction provides access to bicyclic enones, which further undergo acid-mediated intramolecular annulation from C2-position to afford highly strained cyclohepta[b]indoles with five contiguous stereocentres and three new C-C bonds in excellent enantioselectivity and diastereoselectivity.
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Affiliation(s)
- Lakshmi Revati Magham
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Satish B Thopate
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Abdus Samad
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Rambabu Chegondi
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
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38
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Liu L, Wen C, Sun G, Li Y, Zhang J, Zhang Z, Wang Z, She M, Liu P, Zhang S, Li J. Multisite-Sequential Cyclization To Construct 1,2,4-Triazole-Based N-Fused Heterocyclics. Org Lett 2023; 25:1530-1535. [PMID: 36852941 DOI: 10.1021/acs.orglett.3c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A feasible protocol that uses atomic groups (KSCN, KSeCN, and NH2CN), o-bromobenzoyl hydrazides, and formyls as reaction factors to synthesize N-fused 1,2,4-triazole with benzothiazides, benzoselenazinones, and quinazolinones was proposed. The method overcomes the lengthy multistep synthesis, narrow substrate scope, and toxicity challenge induced by the use or production of hazardous substances. It also enables the development of fused-heterocyclic selenium and quinazolinone derivatives. Their fluorescent performance further demonstrates the practicability of this methodology.
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Affiliation(s)
- Lang Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Changting Wen
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Guojin Sun
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Yao Li
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jun Zhang
- College of Chemistry and Chemical Engineering, Ningxia University Yinchuan, Ningxia, 750021, P. R. China
| | - Zhe Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Zesi Wang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Mengyao She
- Ministry of Education Key Laboratory of Resource Biology and Modern Biotechnology in Western China, The College of Life Sciences, Faculty of Life and Health Science, Northwest University, Xi'an, Shaanxi Province 710069, P. R. China
| | - Ping Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Shengyong Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jianli Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710127, P. R. China
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39
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Li JL, Yang SL, Dai QS, Huang H, Jiang L, Li QZ, Wang QW, Zhang X, Han B. Modular synthesis of 1,4-diketones through regioselective bis-acylation of olefins by merging NHC and photoredox catalysis. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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40
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Zhang Y, Duan J, Zhou Y, Li X, Yao W, Wang Z. Rapid Construction of Tricyclic Furanobenzodihydropyrans by Asymmetric Tandem Reaction. J Org Chem 2023; 88:1815-1827. [PMID: 36644839 DOI: 10.1021/acs.joc.2c02228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A process based on the organocatalyzed Mannich/cycloketalization/transesterification tandem reaction of 1-(2-hydroxyaryl)-1,3-diketones and β,γ-alkynyl α-imino esters has been developed, delivering a variety of tricyclic furanobenzodihydropyrans with excellent results (up to 99% yield, 99% ee, and >19:1 dr).
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Affiliation(s)
- Yulong Zhang
- Chongqing Key Laboratory of Green Synthesis and Application, College of Chemistry, Chongqing Normal University, Chongqing 401331, PR China
| | - Jingxiang Duan
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, Chongqing 401331, PR China
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Xiaoyi Li
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, Chongqing 401331, PR China
| | - Weijun Yao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
| | - Zhen Wang
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, Chongqing 401331, PR China
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41
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Fan JQ, Yang Y, Tao CB, Li MB. Cadmium-Doped and Pincer Ligand-Modified Gold Nanocluster for Catalytic KA 2 Reaction. Angew Chem Int Ed Engl 2023; 62:e202215741. [PMID: 36478512 DOI: 10.1002/anie.202215741] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/05/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
A gold nanocluster Au17 Cd2 (PNP)2 (SR)12 (PNP=2,6-bis(diphenylphosphinomethyl)pyridine, SR=4-MeOPhS) consisting of an icosahedral Au13 kernel, two Au2 CdS6 staple motifs, and two PNP pincer ligands has been designed, synthesized and well characterized. This cadmium and PNP pincer ligand co-modified gold nanocluster showed high catalytic efficiency in the KA2 reaction, featuring high TON, mild reaction conditions, broad substrate scope as well as catalyst recyclability. Comparison of the catalytic performance between Au17 Cd2 (PNP)2 (SR)12 and the structurally similar single cadmium (or PNP) modified gold nanoclusters demonstrates that the co-existence of the cadmium and PNP on the surface is crucial for the high catalytic activity of the gold nanocluster. This work would be enlightening for developing efficient catalysts for cascade reactions and discovering the catalytic potential of metal nanoclusters in organic transformations.
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Affiliation(s)
- Ji-Qiang Fan
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, P. R. China
| | - Ying Yang
- College of Materials and Chemical Engineering, West Anhui University, Lu'an, Anhui, 237015, P. R. China
| | - Cheng-Bo Tao
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, P. R. China
| | - Man-Bo Li
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, P. R. China
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42
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Qin X, Zhang J, Wang ZY, Song Y, Yang Y, Zhang W, Liu H. Highly regioselective synthesis of lactams via cascade reaction of α,β-unsaturated ketones, ketoamides, and DBU as a catalyst. RSC Adv 2023; 13:4782-4786. [PMID: 36760281 PMCID: PMC9901288 DOI: 10.1039/d2ra07117g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/27/2022] [Indexed: 02/08/2023] Open
Abstract
Herein, the aldol/Michael cascade reaction on the β,γ-positions of α,β-unsaturated ketones with ketoamides to construct bicyclic lactams via DBU catalysis has been developed. The substrates were well-tolerated with high regio- and diastereoselectivities in moderate to good yields (32 examples). The control experiments revealed that the hydrogen of the amide was the key factor.
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Affiliation(s)
- Xin Qin
- College of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China .,Institute of New Materials & Industrial Technology, Wenzhou University Wenzhou 325035 P. R. China
| | - Jinhai Zhang
- College of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China .,Institute of New Materials & Industrial Technology, Wenzhou University Wenzhou 325035 P. R. China
| | - Zhan-Yong Wang
- School of Pharmacy, Xinxiang UniversityXinxiang453003P. R. China
| | - Yimei Song
- College of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China .,Institute of New Materials & Industrial Technology, Wenzhou University Wenzhou 325035 P. R. China
| | - Yixiao Yang
- College of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China .,Institute of New Materials & Industrial Technology, Wenzhou University Wenzhou 325035 P. R. China
| | - Wenhai Zhang
- College of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China .,Institute of New Materials & Industrial Technology, Wenzhou University Wenzhou 325035 P. R. China
| | - Hongxin Liu
- College of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China .,Institute of New Materials & Industrial Technology, Wenzhou University Wenzhou 325035 P. R. China
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43
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Vopálenská A, Dočekal V, Petrželová S, Císařová I, Veselý J. Access to Spirooxindole-Fused Cyclopentanes via a Stereoselective Organocascade Reaction Using Bifunctional Catalysis. J Org Chem 2023. [PMID: 36705518 DOI: 10.1021/acs.joc.2c02478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The present study reports an asymmetric organocascade reaction of oxindole-derived alkenes with 3-bromo-1-nitropropane efficiently catalyzed by the bifunctional catalyst. Spirooxindole-fused cyclopentanes were produced in moderate-to-good isolated yields (15-69%) with excellent stereochemical outcomes. The synthetic utility of the protocol was exemplified on a set of additional transformations of the corresponding spirooxindole compounds.
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Affiliation(s)
- Andrea Vopálenská
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43Prague 2, Czech Republic
| | - Vojtěch Dočekal
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43Prague 2, Czech Republic
| | - Simona Petrželová
- Department of Teaching and Didactics of Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43Prague 2, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43Prague 2, Czech Republic
| | - Jan Veselý
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43Prague 2, Czech Republic
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44
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Nomura M, Begum Z, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Nakano H. Thiourea fused γ-amino alcohol organocatalysts for asymmetric Mannich reaction of β-keto active methylene compounds with imines. RSC Adv 2023; 13:3715-3722. [PMID: 36756606 PMCID: PMC9891089 DOI: 10.1039/d2ra08317e] [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: 12/30/2022] [Accepted: 01/18/2023] [Indexed: 01/27/2023] Open
Abstract
Catalytic functionality of new optically active thiourea fused γ-amino alcohols was examined in the asymmetric Mannich reaction of β-keto active methylene compounds with imines to afford chiral Mannich products, β-amino keto compounds, with continuous chiral centers, that are versatile synthetic intermediates for deriving various biologically active compounds. In particular, the thiourea fused γ-amino alcohols showed satisfactory catalytic activity in this reaction and afforded chiral Mannich products in excellent chemical yield (up to 88%) and stereoselectivities (up to syn : anti/93 : 7 dr, up to 99% ee).
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Affiliation(s)
- Miku Nomura
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Zubeda Begum
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Yuko Okuyama
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan .,Tohoku Medical and Pharmaceutical University 4-4-1 Komatsushima, Aoba-Ku Sendai 981-8558 Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Sciences, Tohoku Medical and Pharmaceutical University4-4-1 Komatsushima, Aoba-KuSendai 981-8558Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Michio Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | - Suguru Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
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45
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A Catalyst‐ and Solvent‐ Free Synthesis of Tetra‐Substituted Pyrroles by Multicomponent Reaction. ChemistrySelect 2023. [DOI: 10.1002/slct.202204564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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46
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Begum Z, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Nakano H. New boro amino amide organocatalysts for asymmetric cross aldol reaction of ketones with carbonyl compounds. RSC Adv 2023; 13:888-894. [PMID: 36686933 PMCID: PMC9811241 DOI: 10.1039/d2ra06272k] [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: 10/05/2022] [Accepted: 12/20/2022] [Indexed: 01/05/2023] Open
Abstract
Distinct types of new boron fused primary amino amide organocatalysts were designed and synthesized from commercially available amino acids. Their catalytic activities were investigated in asymmetric crossed aldol reaction of ketones with aromatic aldehydes to afford the corresponding chiral anti-aldol adducts with good chemical yields, moderate diastereoselectivity and good to excellent enantioselectivities (up to 94% yields, up to 90 : 10 dr, up to 94% ee).
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Affiliation(s)
- Zubeda Begum
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Yuko Okuyama
- Tohoku Medical and Pharmaceutical University4-4-1 Komatsushima, Aoba-KuSendai 981-8558Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Sciences, Tohoku University6-3 Aoba, Aramaki, Aoba-KuSendai 980-8578Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
| | - Michio Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | - Suguru Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology27-1 Mizumoto-choMuroran 050-8585Japan
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47
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Asymmetric organocatalysis: from a breakthrough methodology to sustainable catalysts and processes. Russ Chem Bull 2023. [DOI: 10.1007/s11172-023-3713-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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48
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Isoda M, Sato K, Kameda K, Wakabayashi K, Sato R, Minami H, Karuo Y, Tarui A, Kawai K, Omote M. Rhodium-catalyzed intramolecular reductive aldol-type cyclization: Application for the synthesis of a chiral necic acid lactone. Beilstein J Org Chem 2022; 18:1642-1648. [DOI: 10.3762/bjoc.18.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/18/2022] [Indexed: 12/05/2022] Open
Abstract
A rhodium-catalyzed intramolecular reductive aldol-type cyclization is described to give β-hydroxylactones with high diastereoselectivities. The stereoselectivity of this cyclization is highly solvent dependent and can give syn- or anti-β-hydroxylactones with high diastereoselectivity. This methodology was also applied to the synthesis of a chiral necic acid lactone which is a structural component of the pyrrolizidine alkaloid monocrotaline.
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49
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Qian BC, Zhu CZ, Shen GB. The Application of Sulfonyl Hydrazides in Electrosynthesis: A Review of Recent Studies. ACS OMEGA 2022; 7:39531-39561. [PMID: 36385900 PMCID: PMC9648049 DOI: 10.1021/acsomega.2c04205] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/13/2022] [Indexed: 05/25/2023]
Abstract
Sulfonyl hydrazides are viewed as alternatives to sulfinic acids and their salts or sulfonyl halides, which are broadly used in organic synthesis or work as active pharmaceutical substances. Generally, sulfonyl hydrazides are considered good building blocks and show powerful value in a diverse range of reactions to construct C-S bonds or C-C bonds, and even C-N bonds as sulfur, carbon, or nitrogen sources, respectively. As a profound synthetic tool, the electrosynthesis method was recently used to achieve efficient and green applications of sulfonyl hydrazides. Interestingly, many unique and novel electrochemical syntheses using sulfonyl hydrazides as radical precursors have been developed, including cascade reactions, functionalization of heterocycles, as well as a continuous flow method combining with electrochemical synthesis since 2017. Accordingly, it is necessary to specifically summarize the recent developments of electrosynthesis with only sulfonyl hydrazides as radical precursors to more deeply understand and better design novel electrochemical synthesis reactions. Herein, electrosynthesis research using sulfonyl hydrazides as radical precursors since 2017 is reviewed in detail based on the chemical structures of products and reaction mechanisms.
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50
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Wei J, Tang Y, Yang Q, Li H, He D, Cai Y. Asymmetric Ketoalkylation/Rearrangement of Alkyenlfurans via Synergistic Photoredox/Brønsted Acid Catalysis. Org Lett 2022; 24:7928-7933. [PMID: 36269030 DOI: 10.1021/acs.orglett.2c03040] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An enantioselective three-component rearrangement of alkenylfurans with various cycloalkyl silyl peroxides and anilines has been developed by merging photoredox catalysis with chiral Brønsted acid catalysis. This protocol provides expedient access to a broad spectrum of ketoalkyl-functionalized 4-aminocyclopentenones in high yields with excellent enantio- and diastereoselectivities. Diverse functional groups can be introduced via facile product derivations.
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Affiliation(s)
- Jie Wei
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yurong Tang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Qian Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Hongxiang Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Dongxian He
- Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Yunfei Cai
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
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