1
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Wang H, Wei Y, He Y, He TJ, Lin YW. Phosphine-Catalyzed Ring-Opening Regioselective Addition of Cyclopropenones with Amides. J Org Chem 2024; 89:10093-10098. [PMID: 38935753 DOI: 10.1021/acs.joc.4c00941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
A series of amides, including α-bromo hydroxamates, N-alkoxyamides, and N-aryloxyamides, were subjected to phosphine-catalyzed ring-opening O-selective addition with cyclopropenones, producing various special α,β-unsaturated esters containing oxime ether motif, in moderate to excellent yields, with high regioselectivity, and exclusive O-selectivity. The methodology is highly atom-economical, with simple operation procedures, and compatible with a wide substrate scope (more than 44 examples).
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Affiliation(s)
- Huamin Wang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, P. R. China
| | - Yibo Wei
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, P. R. China
| | - Yongjun He
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, P. R. China
| | - Tian-Juan He
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, P. R. China
| | - Ying-Wu Lin
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, P. R. China
- Hengyang Medical College, University of South China, Hengyang 421001, P. R. China
- Laboratory of Protein Structure and Function, University of South China Medical School, Hengyang 421001, P. R. China
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2
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Yao YX, Zhang J, Min X, Qin L, Wei Y, Gao Y, Hu XQ. Expedient access to polysubstituted acrylamides via strain-release-driven dual phosphine and palladium catalysis. Chem Commun (Camb) 2024; 60:6532-6535. [PMID: 38837153 DOI: 10.1039/d4cc01968g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Polysubstituted acrylamides are ubiquitous in bioactive molecules and natural products. However, synthetic methods for the assembly of these important motifs remain underdeveloped. Herein, we report the expedient synthesis of structurally diverse and synthetically challenging polysubstituted acrylamides from readily available aromatic amines, cyclopropenones (CpOs), and aryl halides via the synergistic merging of nucleophilic phosphine-mediated amidation and palladium-catalyzed C-H arylation. The reaction is scalable, and some obtained acrylamides proved to be solid state luminogens with obvious aggregation-induced emission (AIE) properties, demonstrating the synthetic potential in drug discovery and material development.
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Affiliation(s)
- Yu-Xiang Yao
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central MinZu University, Wuhan 430074, China.
| | - Jing Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central MinZu University, Wuhan 430074, China.
| | - Xuehong Min
- Equine Science Research and Doping Control Center, Wuhan Business University, Wuhan 430056, China
| | - Lan Qin
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central MinZu University, Wuhan 430074, China.
| | - Yi Wei
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central MinZu University, Wuhan 430074, China.
| | - Yang Gao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xiao-Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central MinZu University, Wuhan 430074, China.
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3
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Deka H, Fridman N, Eisen MS. Temperature Dependence of the Ring Opening of Cyclopropene Imines on Thorium Metallocenes. Inorg Chem 2024; 63:9572-9578. [PMID: 38471108 PMCID: PMC11134510 DOI: 10.1021/acs.inorgchem.3c04213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/13/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024]
Abstract
The reactions of two highly strained cyclopropenimine ligands L1H and L2H (L1H = N1,N1,N2,N2-tetraisopropyl-3-iminocycloprop-1-ene-1,2-diamine, L2H = N1,N1,N2,N2-tetracyclohexyl-3-iminocycloprop-1-ene-1,2-diamine) with three thorium precursors Cp*2ThCl2, Cp*2Th(Cl)(CH3), and Cp*2Th(CH3)2 were studied. At -20 °C, L1H and L2H react with Cp*2ThCl2 to form Th1 (Th1 = Cp*2ThCl2(L1H)) and Th2 (Th2 = Cp*2ThCl2(L2H)), respectively, where the neutral ligand coordinates to the thorium metal center. Coordination of the ligand to the thorium metal center introduces aromaticity at the cyclopropene ring of the ligand. Reaction at room temperature results in the ring opening of the ligand to form Th3 (Th3 = Cp*2ThCl2((Z)-2,3-bis(diisopropylamino)acrylonitrile) and Th4 (Th4 = Cp*2ThCl2((Z)-2,3-bis(dicyclohexylamino)acrylonitrile), where the cyclopropenimine converts into a nitrile and coordinates to the thorium metal center. Reaction of L1H and L2H with Cp*2Th(Cl)(CH3) and/or Cp*2Th(CH3)2 at -20 °C results in a rapid methanolysis reaction and forms Cp*2Th(L1/L2)(CH3/Cl)-type complexes Th5 (Th5 = Cp*2Th(L1)(CH3)), Th6 (Th6 = Cp*2Th(L2)(CH3), Th7 (Th7 = Cp*2Th(L1)(Cl), and Th8 (Th8 = Cp*2Th(L2)(Cl). On the other hand, at room temperature, these reactions result in a ring opening of the ligand. Room-temperature reaction of L1H and L2H with Cp*2Th(CH3)2 results in Th9 (Th9 = Cp*2Th(CH3)((Z)-3-imino-N1,N1,N2,N2-tetraisopropylbut-1-ene-1,2-diamine) and Th10 (Th10 = Cp*2Th(CH3)((Z)-3-imino-N1,N1,N2,N2-tetracyclohexylbut-1-ene-1,2-diamine). Similarly, at room temperature, L1H and L2H react with Cp*2Th(Cl)(CH3) to form Th11 (Th11 = Cp*2Th(Cl)((Z)-3-imino- N1,N1,N2,N2-tetraisopropylbut-1-ene-1,2-diamine) and Th12 (Th12 = Cp*2Th(Cl)((Z)-3-imino-N1,N1,N2,N2-tetracyclohexylbut-1-ene-1,2-diamine). The ring-opening reaction is assisted by the nucleophilic attack of the thorium-coordinated methyl group to the highly strained cyclopropene imine carbon.
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Affiliation(s)
- Hemanta Deka
- Schulich
Faculty of Chemistry, Technion-Israel Institute
of Technology, Haifa
City 3200003, Israel
- Department
of Chemistry, Goalpara College, Goalpara 783101, Assam, India
| | - Natalia Fridman
- Schulich
Faculty of Chemistry, Technion-Israel Institute
of Technology, Haifa
City 3200003, Israel
| | - Moris S. Eisen
- Schulich
Faculty of Chemistry, Technion-Israel Institute
of Technology, Haifa
City 3200003, Israel
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4
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Zhang Z, Liang FF, Zhang SL, Sun W, Zhou AX, Sun M. Pd-Catalyzed Three-Component Coupling of Cyclopropenones via Sequential C-C Bond Activation and Allylation. Org Lett 2024; 26:4262-4267. [PMID: 38722897 DOI: 10.1021/acs.orglett.4c01200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
A novel Pd-catalyzed three-component domino reaction for the stereoselective synthesis of highly functionalized allyl cinnamates has been developed. In this protocol, a sequential process of C-C bond activation and intermolecular allylic substitution was well-organized. The key for this transformation is the in situ generated hydrolysis product of cyclopropenone, which triggered a new reaction with vinylethylene carbonates. The reaction mechanism was investigated, demonstrating the high stereoselectivity and excellent atomic economy in this process.
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Affiliation(s)
- Zhou Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Fei-Fei Liang
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Shu-Lin Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Wei Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - An-Xi Zhou
- Key Laboratory of Applied Organic Chemistry, Higher Institutions of Jiangxi Province, Shangrao Normal University, Shangrao, Jiangxi 334001, China
| | - Meng Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
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5
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Nanda T, Fastheem M, Linda A, Pati BV, Banjare SK, Biswal P, Ravikumar PC. Recent Advancement in Palladium-Catalyzed C–C Bond Activation of Strained Ring Systems: Three- and Four-Membered Carbocycles as Prominent C3/C4 Building Blocks. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tanmayee Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Muhammed Fastheem
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Astha Linda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Bedadyuti Vedvyas Pati
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Pragati Biswal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Ponneri C. Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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6
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Tomasini M, Zhang J, Zhao H, Besalú E, Falivene L, Caporaso L, Szostak M, Poater A. A predictive journey towards trans-thioamides/amides. Chem Commun (Camb) 2022; 58:9950-9953. [PMID: 35983851 DOI: 10.1039/d2cc04228b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cis-trans isomerization of (thio)amides was studied by DFT calculations to get the model for the higher preference for the cis conformation by guided predictive chemistry, suggesting how to select the alkyl/aryl substituents on the C/N atoms that lead to the trans isomer. Multilinear analysis, together with cross-validation analysis, helped to select the best fitting parameters to achieve the energy barriers of the cis to trans interconversion, as well as the relative stability between both isomers. Double experimental check led to the synthesis of the best trans candidate with sterically demanding t-butyl substituents, confirming the utility of predictive chemistry, bridging organic and computational chemistry.
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Affiliation(s)
- Michele Tomasini
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain. .,Dipartimento di Chimica e Biologia, Università di Salerno, Via Ponte don Melillo, 84084, Fisciano, Italy
| | - Jin Zhang
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, 6 Xuefu Road, Xi'an, 710021, China
| | - Hui Zhao
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, 6 Xuefu Road, Xi'an, 710021, China
| | - Emili Besalú
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain.
| | - Laura Falivene
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Ponte don Melillo, 84084, Fisciano, Italy
| | - Lucia Caporaso
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Ponte don Melillo, 84084, Fisciano, Italy
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ, 07102, USA
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain.
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7
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Lehr M, Neumann T, Näther C, McConnell AJ. M-CPOnes: transition metal complexes with cyclopropenone-based ligands for light-triggered carbon monoxide release. Dalton Trans 2022; 51:6936-6943. [PMID: 35448899 DOI: 10.1039/d2dt00835a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of CO-releasing molecules, M-CPOnes, was prepared combining cyclopropenone-based ligands for CO release with the modular scaffold of transition metal complexes. In proof-of-concept studies, M-CPOnes based on ZnII, FeII and CoII are stable in the dark but undergo light-triggered CO release with the cyclopropenone substituents and metal ions enabling tuning of the photophysical properties. Furthermore, the choice of metal allows the use of different spectroscopic methods to monitor photodecarbonylation from fluorescence spectroscopy to UV/vis spectroscopy and paramagnetic NMR spectroscopy. The modularity of M-CPOnes from the metal ion to the cyclopropenone substitution and potential for further functionalisation of the ligand make M-CPOnes appealing for tailored functionality in applications.
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Affiliation(s)
- Marc Lehr
- Otto Diels Institute of Organic Chemistry, Christian-Albrechts-Universität zu Kiel, Otto-Hahn-Platz 4, Kiel 24098, Germany.
| | - Tjorge Neumann
- Otto Diels Institute of Organic Chemistry, Christian-Albrechts-Universität zu Kiel, Otto-Hahn-Platz 4, Kiel 24098, Germany.
| | - Christian Näther
- Institute of Inorganic Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, Kiel 24118, Germany
| | - Anna J McConnell
- Otto Diels Institute of Organic Chemistry, Christian-Albrechts-Universität zu Kiel, Otto-Hahn-Platz 4, Kiel 24098, Germany.
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8
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Synthesis of Functional Carbocycles and Heterocycles via Transition-Metal-Catalyzed Annulation or Homocoupling of Difluorocyclopropenes. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Hu H, Li BS, Xu JL, Sun W, Wang Y, Sun M. Rh(III)-Catalyzed spiroannulation of ketimines with cyclopropenones via sequential C-H/C-C bond activation. Chem Commun (Camb) 2022; 58:4743-4746. [PMID: 35323830 DOI: 10.1039/d2cc00421f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented Rh(III)-catalyzed [3+3]-spiroannulation of ketimines with cyclopropenones to access spiro[4,5]dienones has been developed. Sequential C-H/C-C bond activation and subsequent nucleophilic addition are disclosed in this process. This procedure represents the first example of the construction of spirolactams utilising cyclopropenones as 3C synthons. The remarkable advantages of this protocol are excellent chemo- and regio-selectivity, wide functional group tolerance, high reaction yields, and tolerance towards H2O.
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Affiliation(s)
- Hong Hu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
| | - Bin-Shi Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
| | - Jing-Lei Xu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
| | - Wei Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.
| | - Yong Wang
- BGI-Shenzhen, Shenzhen 518083, China.
| | - Meng Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China. .,State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
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10
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Pati BV, Ghosh A, Yadav K, Banjare SK, Pandey S, Lourderaj U, Ravikumar PC. Palladium-catalyzed selective C-C bond cleavage and stereoselective alkenylation between cyclopropanol and 1,3-diyne: one-step synthesis of diverse conjugated enynes. Chem Sci 2022; 13:2692-2700. [PMID: 35340856 PMCID: PMC8890101 DOI: 10.1039/d1sc04780a] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/24/2022] [Indexed: 12/22/2022] Open
Abstract
The stereoselective synthesis of 1,3-enynes from 1,3-diynes is demonstrated by palladium-catalyzed selective C–C bond cleavage of cyclopropanol. Exclusive formation of mono-alkenylated adducts was achieved by eliminating the possibility of di-functionalization with high stereoselectivity. Indeed, this protocol worked very well with electronically and sterically diverse substrates. Several studies, including deuterium labeling experiments and intermolecular competitive experiments, were carried out to understand the mechanistic details. The atomic-level mechanism followed in the catalytic process was also validated using DFT calculations, and the rate-controlling states in the catalytic cycle were identified. Furthermore, preliminary mechanistic investigations with radical scavengers revealed the non-involvement of the radical pathway in this transformation. Palladium-catalyzed tandem activation and functionalization of readily accessible cyclopropanols have been demonstrated to access valuable conjugated enynes from 1,3-diynes with high stereo-selectivity.![]()
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Affiliation(s)
- Bedadyuti Vedvyas Pati
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
| | - Asit Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
| | - Komal Yadav
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
| | - Shalini Pandey
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
| | - Upakarasamy Lourderaj
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI Jatani Khurda 752050 Odisha India
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11
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Peng W, Li P, Ling R, Wang Z, Feng X, Liu J, Yang Q, Yan J. Diversity of Volatile Compounds in Ten Varieties of Zingiberaceae. Molecules 2022; 27:565. [PMID: 35056880 PMCID: PMC8777948 DOI: 10.3390/molecules27020565] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/08/2022] [Accepted: 01/09/2022] [Indexed: 11/17/2022] Open
Abstract
Zingiberaceae plants are distributed in the tropical and subtropical regions of the world, being used in many famous medicinal materials. Meanwhile, some Zingiberaceae plants are important horticultural flowers because they are green all year round and have special aromas. To conduct an extensive investigation of the resources of Zingiberaceae plants, the volatile compounds of ten species of Zingiberaceae were extracted and analyzed by GC-MS, including Costus comosus var. bakeri (K.Schum.) Maas, Curcuma rubescens Roxb., Curcuma aeruginosa Roxb., Curcuma attenuata Wall., Hongfengshou, Hedychium coronarium Koeng, Zingiber zerumbet (L.) Smith, Hedychium brevicaule D. Fang, Alpinia oxyphylla Miq., and Alpinia pumila Hook.F. A total of 162 compounds were identified, and most of those identified were monoterpenes and sesquiterpenes. (E)-labda-8(17),12-diene-15,16-dial, n-hexadecanoic acid, 4-methoxy-6-phenethyl-2H-pyran-2-one, and L-β-pinene were found in high concentrations among the plants. These ten species of Zingiberaceae contained some of the same volatiles, but their contents were different. Pharmacological effects may be associated with the diversity of volatiles in these ten plants.
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Affiliation(s)
- Weiyao Peng
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Eco-Circular Agriculture/Guangdong Engineering Research Centre for Modern Eco-Agriculture/College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; (W.P.); (P.L.); (R.L.); (Z.W.)
| | - Ping Li
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Eco-Circular Agriculture/Guangdong Engineering Research Centre for Modern Eco-Agriculture/College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; (W.P.); (P.L.); (R.L.); (Z.W.)
| | - Ruimei Ling
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Eco-Circular Agriculture/Guangdong Engineering Research Centre for Modern Eco-Agriculture/College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; (W.P.); (P.L.); (R.L.); (Z.W.)
| | - Zhenzhen Wang
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Eco-Circular Agriculture/Guangdong Engineering Research Centre for Modern Eco-Agriculture/College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; (W.P.); (P.L.); (R.L.); (Z.W.)
| | - Xianhui Feng
- School of Architecture, South China University of Technology, Guangzhou 510641, China
| | - Ju Liu
- Guangdong Provincial Tobacco Shaoguan Co., Ltd., Shaoguan 512000, China;
| | - Quan Yang
- Guangdong Provincial Research Center on Good Agricultural Practice & Comprehensive Agricultural Development Engineering Technology of Cantonese Medicinal Materials/Comprehensive Experimental Station of Guangzhou, Chinese Material Medica, China Agriculture Research System (CARS-21-16)/Key Laboratory of State Administration of Traditional Chinese Medicine for Production & Development of Cantonese Medicinal Materials/School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Jian Yan
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Eco-Circular Agriculture/Guangdong Engineering Research Centre for Modern Eco-Agriculture/College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; (W.P.); (P.L.); (R.L.); (Z.W.)
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12
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Hong CM, Zou FF, Zhuang X, Luo Z, Liu ZQ, Ren LQ, Li QH, Liu TL. 2-Pyridinylmethyl borrowing: base-promoted C-alkylation of (pyridin-2-yl)-methyl alcohols with ketones via cleavage of unstrained C(sp3)–C(sp3) bonds. Org Chem Front 2022. [DOI: 10.1039/d1qo01446c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
2-Pyridinylmethyl Borrowing: Transition-metal-free 2-pyridinylmethyl borrowing C-alkylation of alcohols access to ketones is developed. This unstrained C(sp3)–C(sp3) bonds cleavage of unactivated alcohols avoids the use of transition metals.
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Affiliation(s)
- Chuan-Ming Hong
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Fei-Fei Zou
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xin Zhuang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhen Luo
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zheng-Qiang Liu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Li-Qing Ren
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qing-Hua Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Tang-Lin Liu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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Wang H, Yan R. Iron‐Catalyzed One‐Step Synthesis of Isothiazolone/1,2‐Selenazolone Derivatives via [3+1+1] Annulation of Cyclopropenones, Anilines, and Elemental Chalcogens. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongchen Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000, Gansu People's Republic of China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000, Gansu People's Republic of China
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14
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Zhou HQ, Gu XW, Zhou XH, Li L, Ye F, Yin GW, Xu Z, Xu LW. Enantioselective palladium-catalyzed C(sp 2)-C(sp 2) σ bond activation of cyclopropenones by merging desymmetrization and (3 + 2) spiroannulation with cyclic 1,3-diketones. Chem Sci 2021; 12:13737-13743. [PMID: 34760158 PMCID: PMC8549799 DOI: 10.1039/d1sc04558j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/19/2021] [Indexed: 11/21/2022] Open
Abstract
Catalytic asymmetric variants for functional group transformations based on carbon–carbon bond activation still remain elusive. Herein we present an unprecedented palladium-catalyzed (3 + 2) spiro-annulation merging C(sp2)–C(sp2) σ bond activation and click desymmetrization to form synthetically versatile and value-added oxaspiro products. The operationally straightforward and enantioselective palladium-catalyzed atom-economic annulation process exploits a TADDOL-derived bulky P-ligand bearing a large cavity to control enantioselective spiro-annulation that converts cyclopropenones and cyclic 1,3-diketones into chiral oxaspiro cyclopentenone–lactone scaffolds with good diastereo- and enantio-selectivity. The click-like reaction is a successful methodology with a facile construction of two vicinal carbon quaternary stereocenters and can be used to deliver additional stereocenters during late-state functionalization for the synthesis of highly functionalized or more complex molecules. An unprecedented palladium-catalyzed (3 + 2) spiro-annulation merging C–C bond activation and desymmetrization was developed for the enantioselective construction of synthetically versatile and value-added oxaspiro products with up to 95% ee.![]()
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Affiliation(s)
- Han-Qi Zhou
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Xing-Wei Gu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Xiao-Hua Zhou
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Fei Ye
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Guan-Wu Yin
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, Hangzhou Normal University No. 2318, Yuhangtang Road Hangzhou 311121 P. R. China .,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute and Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences P. R. China
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15
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Huang T, Yang C, Shi Y, Chen J, Wang T, Guo X, Liu X, Ding H, Wu Z, Hai L, Wu Y. One‐Pot Construction of Diverse Products using Versatile Cyclopropenones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100845] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tianle Huang
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Chunyan Yang
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Yuesen Shi
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Jian Chen
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Ting Wang
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Xiaoyu Guo
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Xuexin Liu
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Haosheng Ding
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Zhouping Wu
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Li Hai
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Yong Wu
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
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16
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Chen Q, Teng Y, Xu F. Lanthanide Silylamide-Catalyzed Synthesis of Pyrano[2,3- b]indol-2-ones. Org Lett 2021; 23:4785-4790. [PMID: 34048269 DOI: 10.1021/acs.orglett.1c01506] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A lanthanide silylamide-catalyzed tandem reaction of isatins, diethyl phosphite, and 2,3-diarylcyclopropenones has been developed. A series of pyrano[2,3-b]indol-2-ones were synthesized in high yields. The cooperation of the Lewis acidity of the lanthanide center and the Bronsted basicity of the N(SiMe3)2 anion may be the key factor affecting the catalytic activity of lanthanide amides.
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Affiliation(s)
- Qifa Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yue Teng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Fan Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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