1
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Wang L, Ma R, Xia J, Liu X, Sun J, Zheng G, Zhang Q. DBU-Mediated Isomerization/6-π Electro-Cyclization/Oxidation Cascade of Sulfonyl-Substituted Allenyl Ketones for the Construction of Hetero-1,3,5-Trisubstituted Benzene. Chemistry 2023; 29:e202203309. [PMID: 36509732 DOI: 10.1002/chem.202203309] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/26/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
1,3,5-tri-substituted benzene rings emerged with unique properties has widespread applications in materials, boosting the rapid development of their synthesis. Despite the significance, the direct construction of hetero-1,3,5-trisubstituted benzene core was far less-developed. Herein, we realized a DBU-mediated isomerization/6-π electro-cyclization/oxidative aromatization cascade of sulfonyl-substituted allenyl ketones under an air atmosphere (DBU=1,8-diazabicyclo[5.4.0]undec-7-ene). This versatile protocol featured metal-free conditions, easy operation, and broad functional group tolerance provides a new avenue for the construction of hetero-1,3,5-tri-substituted benzene.
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Affiliation(s)
- Lihong Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Ruiyang Ma
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Jiuli Xia
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Ximin Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Jiaqiong Sun
- School of Environment, Northeast Normal University, Changchun 130117, Changchun, 130024, P. R. China
| | - Guangfan Zheng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Qian Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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2
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Hara M, Takeshita T, Kurata H, Kimura T. Decomposition of Unpolarized Fluorescence Spectrum of Uniaxially Oriented 1,3,5-Triphenylbenzene Microcrystals Into Polarized Fluorescence Spectra. J Fluoresc 2023:10.1007/s10895-023-03163-w. [PMID: 36787039 DOI: 10.1007/s10895-023-03163-w] [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: 12/14/2022] [Accepted: 01/30/2023] [Indexed: 02/15/2023]
Abstract
Luminescence from solids such as crystals and aggregates is of growing academic and industrial interest. In this study, we report decomposition of the unpolarized fluorescence spectrum of uniaxially oriented 1,3,5-triphenylbenzene (TPB) microcrystals into four polarized spectra measured with polarizer (V: vertical and H: horizontal) and analyser (V: vertical and H: horizontal), where V and H indicate perpendicular and parallel to the layer of TPB molecules in the crystal, respectively. Resolved spectra were interpreted in terms of the molecular and excimer like (J- and H-dimer) emissions. The origin of the excimer like emissions was discussed in relation to the molecular packing in the crystal. It was shown that polarized crystal fluorescence can provide insight into the excitation/emission process in the crystal. Although preliminary, this study demonstrates the potential of polarized fluorescence to elucidate the luminescent mechanism.
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Affiliation(s)
- Michihiro Hara
- Department of Applied Chemistry and Food Sciences, Fukui University of Technology, 3-6-1 Gakuen, Fukui, 910-8505, Japan.
| | - Tatsuya Takeshita
- Department of Applied Chemistry and Food Sciences, Fukui University of Technology, 3-6-1 Gakuen, Fukui, 910-8505, Japan
| | - Hiroyuki Kurata
- Department of Applied Chemistry and Food Sciences, Fukui University of Technology, 3-6-1 Gakuen, Fukui, 910-8505, Japan
| | - Tsunehisa Kimura
- Department of Applied Chemistry and Food Sciences, Fukui University of Technology, 3-6-1 Gakuen, Fukui, 910-8505, Japan
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3
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Midya SP, Mondal S, Islam ASM, Rashid A, Mondal S, Paul A, Ghosh P. Room-Temperature Synthesis of 1,3,5-Tri( het)aryl Benzene from Nitroalkenes Using Pd(OAc) 2: Complete Mechanistic and Theoretical Studies. Org Lett 2022; 24:4438-4443. [PMID: 35696661 DOI: 10.1021/acs.orglett.2c01662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, a room-temperature catalytic pathway for 1,3,5-tri(het)aryl derivatives from nitroalkenes using simple Pd(OAc)2 is presented. This newly developed C-C bond-forming methodology takes place in a cascade manner with the initial pallado-Morita-Baylis-Hillman (MBH) type adduct. The broad substrate scopes, functional group tolerance, and different aryl-substituted benzene derivatives make this methodology more attractive. Furthermore, the mechanistic understanding through isolation of intermediates and DFT studies of the catalytic cycle provide requisite insight into the methodology.
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Affiliation(s)
- Siba P Midya
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Subal Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Abu S M Islam
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Ambreen Rashid
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Sahidul Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Ankan Paul
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
| | - Pradyut Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India
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4
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Singh A, Singh P, Nath M. Bronsted acidic surfactants: efficient organocatalysts for diverse organic transformations. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Organic transformations using efficient, atom-economical, cost-effective and environmentally benign strategies for the construction of diversified molecules have attracted synthetic chemists worldwide in recent years. These processes often minimize the waste production and avoid the use of hazardous flammable organic solvents. Among various green protocols, the procedures using surfactant-based catalytic systems have received a considerable attention in organic synthesis. In this context, Bronsted acidic surfactants have emerged as efficient catalysts for various C–C, C–O, C–N and C–S bond forming reactions. Many of these reactions occur in water, as Bronsted acidic surfactants have a unique ability of creating hydrophobic pocket through micelle formation in aqueous medium and the substrate molecules react efficiently to afford the targeted products in good yields. In the past, Bronsted acidic surfactant combined catalysts successfully displayed their potential to accelerate the reaction rates of diverse organic transformations. This chapter presents a complete overview on Bronsted acidic surfactants catalyzed organic reactions to construct a variety of aromatic and heteroaromatic molecular frameworks.
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Affiliation(s)
- Abhijeet Singh
- Department of Chemistry , Faculty of Science, University of Delhi , Delhi 110 007 , India
| | - Pargat Singh
- Department of Chemistry , Faculty of Science, University of Delhi , Delhi 110 007 , India
| | - Mahendra Nath
- Department of Chemistry , Faculty of Science, University of Delhi , Delhi 110 007 , India
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5
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Saha A, Wu CM, Peng R, Koodali R, Banerjee S. Facile Synthesis of 1,3,5-Triarylbenzenes and 4-Aryl-NH
-1,2,3-Triazoles Using Mesoporous Pd-MCM-41 as Reusable Catalyst. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801290] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Arijit Saha
- Department of Chemistry; Guru Ghasidas Vishwavidyalaya; 495009 Koni, Bilaspur C.G. India
| | - Chia-Ming Wu
- Department of Chemistry; University of South Dakota; 414E. Clark Street 57069 Vermillion SD USA
| | - Rui Peng
- Department of Chemistry; University of South Dakota; 414E. Clark Street 57069 Vermillion SD USA
| | - Ranjit Koodali
- Department of Chemistry; University of South Dakota; 414E. Clark Street 57069 Vermillion SD USA
| | - Subhash Banerjee
- Department of Chemistry; Guru Ghasidas Vishwavidyalaya; 495009 Koni, Bilaspur C.G. India
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6
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Kaur G, Thakur S, Kaundal P, Chandel K, Banerjee B. p
‐Dodecylbenzenesulfonic Acid: An Efficient Brønsted Acid‐Surfactant‐Combined Catalyst to Carry out Diverse Organic Transformations in Aqueous Medium. ChemistrySelect 2018. [DOI: 10.1002/slct.201802824] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Gurpreet Kaur
- Department of ChemistryIndus International University, V.P.O. Bathu, Distt. Una Himachal Pradesh- 174301 India
| | - Shivani Thakur
- Department of ChemistryIndus International University, V.P.O. Bathu, Distt. Una Himachal Pradesh- 174301 India
| | - Priyanka Kaundal
- Department of ChemistryIndus International University, V.P.O. Bathu, Distt. Una Himachal Pradesh- 174301 India
| | - Kusum Chandel
- Department of ChemistryIndus International University, V.P.O. Bathu, Distt. Una Himachal Pradesh- 174301 India
| | - Bubun Banerjee
- Department of ChemistryIndus International University, V.P.O. Bathu, Distt. Una Himachal Pradesh- 174301 India
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7
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Trinuclear tris(ansa-metallocene) complexes of zirconium and hafnium for olefin polymerization. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.09.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Nguyen TH, Nguyen TA, Tran HM, Nguyen LTT, Luu AT, Lee JY, Nguyen HT. N-Benzoyl dithieno[3,2-b:2',3'-d]pyrrole-based hyperbranched polymers by direct arylation polymerization. Chem Cent J 2017; 11:135. [PMID: 29270833 PMCID: PMC5740055 DOI: 10.1186/s13065-017-0367-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 12/14/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although poly(N-acyl dithieno[3,2-b:2',3'-d]pyrrole)s have attracted great attention as a new class of conducting polymers with highly stabilized energy levels, hyperbranched polymers based on this monomer type have not yet been studied. Thus, this work aims at the synthesis of novel hyperbranched polymers containing N-benzoyl dithieno[3,23,2-b:2',3'-d]pyrrole acceptor unit and 3-hexylthiophene donor moiety via the direct arylation polymerization method. Their structures, molecular weights and thermal properties were characterized via 1H NMR and FTIR spectroscopies, GPC, TGA, DSC and XRD measurements, and the optical properties were investigated by UV-vis and fluorescence spectroscopies. RESULTS Hyperbranched conjugated polymers containing N-benzoyl dithieno[3,23,2-b:2',3'-d]pyrrole acceptor unit and 3-hexylthiophene donor moiety, linked with either triphenylamine or triphenylbenzene as branching unit, were obtained via direct arylation polymerization of the N-benzoyl dithieno[3,23,2-b:2',3'-d]pyrrole, 2,5-dibromo 3-hexylthiophene and tris(4-bromophenyl)amine (or 1,3,5-tris(4-bromophenyl)benzene) monomers. Organic solvent-soluble polymers with number-average molecular weights of around 18,000 g mol-1 were obtained in 80-92% yields. The DSC and XRD results suggested that the branching structure hindered the stacking of polymer chains, leading to crystalline domains with less ordered packing in comparison with the linear analogous polymers. The results revealed that the hyperbranched polymer with triphenylbenzene as the branching unit exhibited a strong red-shift of the maximum absorption wavelength, attributed to a higher polymer stacking order as a result of the planar structure of triphenylbenzene. CONCLUSION Both hyperbranched polymers with triphenylamine/triphenylbenzene as branching moieties exhibited high structural order in thin films, which can be promising for organic solar cell applications. The UV-vis absorption of the hyperbranched polymer containing triphenylbenzene as branching unit was red-shifted as compared with the triphenylamine-containing polymer, as a result of a higher chain packing degree.
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Affiliation(s)
- Tam Huu Nguyen
- Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam
| | - Thu Anh Nguyen
- Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam
- Department of Chemical Engineering, Sungkyunkwan University, Suwon, 16419 Republic of Korea
| | - Hoan Minh Tran
- Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam
| | - Le-Thu T. Nguyen
- Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam
| | - Anh Tuan Luu
- Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam
| | - Jun Young Lee
- Department of Chemical Engineering, Sungkyunkwan University, Suwon, 16419 Republic of Korea
| | - Ha Tran Nguyen
- Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam
- Materials Technology Key Laboratory (Mtlab), Vietnam National University-Ho Chi Minh City, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, 70000 Vietnam
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9
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Mirchi A, Sizochenko N, Dinadayalane T, Leszczynski J. Binding of Alkali Metal Ions with 1,3,5-Tri(phenyl)benzene and 1,3,5-Tri(naphthyl)benzene: The Effect of Phenyl and Naphthyl Ring Substitution on Cation−π Interactions Revealed by DFT Study. J Phys Chem A 2017; 121:8927-8938. [DOI: 10.1021/acs.jpca.7b08725] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Ali Mirchi
- Interdisciplinary
Center for Nanotoxicity, Department of Chemistry, Physics and Atmospheric
Sciences, Jackson State University, 1400 J. R. Lynch Street, Jackson, Mississippi 39217, United States
| | - Natalia Sizochenko
- Interdisciplinary
Center for Nanotoxicity, Department of Chemistry, Physics and Atmospheric
Sciences, Jackson State University, 1400 J. R. Lynch Street, Jackson, Mississippi 39217, United States
| | - Tandabany Dinadayalane
- Department
of Chemistry, Clark Atlanta University, 223 James P. Brawley Drive, S.W., Atlanta, Georgia 30314, United States
| | - Jerzy Leszczynski
- Interdisciplinary
Center for Nanotoxicity, Department of Chemistry, Physics and Atmospheric
Sciences, Jackson State University, 1400 J. R. Lynch Street, Jackson, Mississippi 39217, United States
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10
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Wagh GD, Akamanchi KG. Sulfated tungstate catalyzed synthesis of C 3 -symmetric 1,3,5-triaryl benzenes under solvent-free condition. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.06.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Varga Z, Müller C, Nyulászi L. Significant π-stacking effect between 2,4,6-triphenyl-1-phosphabenzenes. Struct Chem 2017. [DOI: 10.1007/s11224-017-0937-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Ambient temperature synthesis of spiro[indoline-3,2′-thiazolidinones] by a DBSA-catalyzed sequential reaction in water. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.079] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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13
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Tayebee R, Savoji K, Razi MK, Maleki B. Environmentally friendly cyclotrimerization of substituted acetophenones catalyzed by a new nanocomposite of γ-Al2O3 nanoparticles decorated with H5PW10V2O40. RSC Adv 2016. [DOI: 10.1039/c6ra07141d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient protocol for the synthesis of C3-symmetrical 1,3,5-triarylbenzenes under solvent-free conditions. γ-Al2O3/H5PW10V2O40 nanocomposite is introduced as a highly reusable catalyst.
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Affiliation(s)
- Reza Tayebee
- Department of Chemistry
- Hakim Sabzevari University
- Sabzevar
- Iran
| | - Kokab Savoji
- Department of Chemistry
- Islamic Azad University of Tehran North Branch
- Tehran
- Iran
| | - Maryam Kargar Razi
- Department of Chemistry
- Islamic Azad University of Tehran North Branch
- Tehran
- Iran
| | - Behrooz Maleki
- Department of Chemistry
- Hakim Sabzevari University
- Sabzevar
- Iran
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14
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Deng K, Huai QY, Shen ZL, Li HJ, Liu C, Wu YC. Rearrangement of Dypnones to 1,3,5-Triarylbenzenes. Org Lett 2015; 17:1473-6. [DOI: 10.1021/acs.orglett.5b00353] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kai Deng
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Qi-Yong Huai
- Marine
College, Shandong University, Weihai 264209, China
| | - Zhi-Lun Shen
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Hui-Jing Li
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Chen Liu
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Yan-Chao Wu
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
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15
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Tayebee R, Jarrahi M, Maleki B, Kargar Razi M, Mokhtari ZB, Baghbanian SM. A new method for the preparation of 1,3,5-triarylbenzenes catalyzed by nanoclinoptilolite/HDTMA. RSC Adv 2015. [DOI: 10.1039/c4ra11216d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient method for the preparation of 1,3,5-triarylbenzenes. Natural surface-modified NCP as a new and reusable catalyst. Using solvent-free conditions.
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Affiliation(s)
- R. Tayebee
- Department of Chemistry
- School of Sciences
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | - M. Jarrahi
- Department of Chemistry
- School of Sciences
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | - B. Maleki
- Department of Chemistry
- School of Sciences
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | - M. Kargar Razi
- Department of Chemistry
- Tehran North Branch
- Islamic Azad University
- Tehran
- Iran
| | - Z. B. Mokhtari
- Department of Petrochemical Sciences
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | - S. M. Baghbanian
- Department of Chemistry
- Ayatollah Amoli Branch
- Islamic Azad University
- Amol
- Iran
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16
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Tayebee R, Jarrahi M. H6P2W18O62/Nanoclinoptilolite as an efficient nanohybrid catalyst in the cyclotrimerization of aryl methyl ketones under solvent-free conditions. RSC Adv 2015. [DOI: 10.1039/c5ra01344e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new natural nanohybrid material HPA/NCP was prepared. An efficient and environmentally benign method for cyclotrimerization of acetophenones is reported. Water was the only by-product.
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Affiliation(s)
- R. Tayebee
- Department of Chemistry
- School of Sciences
- Hakim Sabzevari University
- Sabzevar
- Iran
| | - M. Jarrahi
- Department of Chemistry
- School of Sciences
- Hakim Sabzevari University
- Sabzevar
- Iran
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17
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18
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Preetam A, Nath M. An eco-friendly Pictet–Spengler approach to pyrrolo- and indolo[1,2-a]quinoxalines using p-dodecylbenzenesulfonic acid as an efficient Brønsted acid catalyst. RSC Adv 2015. [DOI: 10.1039/c4ra16651e] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Environmentally benign synthesis of pyrrolo- and indolo[1,2-a]quinoxalines has been achieved at 25 °C by usingp-dodecylbenzenesulfonic acid as a Brønsted acid catalyst.
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Affiliation(s)
| | - Mahendra Nath
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
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19
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Kimura F, Oshima W, Matsumoto H, Uekusa H, Aburaya K, Maeyama M, Kimura T. Single crystal structure analysis via magnetically oriented microcrystal arrays. CrystEngComm 2014. [DOI: 10.1039/c4ce00839a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single crystal structure determination is possible from a powder sample without preparing a large single crystal.
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Affiliation(s)
- Fumiko Kimura
- Division of Forest and Biomaterials Science
- Kyoto University
- Sakyo-ku, Japan
| | - Wataru Oshima
- Division of Forest and Biomaterials Science
- Kyoto University
- Sakyo-ku, Japan
| | - Hiroko Matsumoto
- Division of Forest and Biomaterials Science
- Kyoto University
- Sakyo-ku, Japan
| | - Hidehiro Uekusa
- Department of Chemistry and Materials Science
- Tokyo Institute of Technology
- Meguro-ku, Japan
| | | | | | - Tsunehisa Kimura
- Division of Forest and Biomaterials Science
- Kyoto University
- Sakyo-ku, Japan
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20
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Prasad D, Preetam A, Nath M. l-Proline-accelerated, eco-friendly synthesis of 9-substituted-2,3,4,9-tetrahydro-1H-xanthen-1-ones under mild conditions. CR CHIM 2013. [DOI: 10.1016/j.crci.2013.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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