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Krasnikova TA, Sayapin YA, Tupaeva IO, Gusakov EA, Ozhogin IV, Lisovin AV, Nikogosov MV, Demidov OP, Bang DN, Lam TD, Thu Trang NT, Dubonosov AD, Minkin VI. Reaction of quinaldine with 4,6-di( tert-butyl)-3-nitro-1,2-benzoquinone. Dependence of the outcome on the reaction conditions and a deeper insight into the mechanism. Heliyon 2023; 9:e16943. [PMID: 37389047 PMCID: PMC10300220 DOI: 10.1016/j.heliyon.2023.e16943] [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: 02/01/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 07/01/2023] Open
Abstract
Condensation of quinaldine with 4,6-di (tert-butyl)-3-nitro-1,2-benzoquinone results in the formation of 5,7-di (tert-butyl)-2-(quinoline-2-yl)-1,3-tropolone, 5,7-di (tert-butyl)-4-nitro-2-(quinoline-2-yl)-1,3-tropolone, 3,3-dimethyl-2-(5-hydroxy-4-nitro-3-tert-butyl-6-quinoline-2-yl-pyridine-2-yl)butanoic acid, 6-(2,2-dimethylprop-3-yl)-5-tert-butyl-4-nitro-2-(quinoline-2-yl)-pyridine-3-ol, 1,7-di (tert-butyl)-3-(quinoline-2-yl)-2-azabicyclo-[3.3.0]octa-2,7-diene-4,6-dione-N-oxide. The formation of 1,3-tropolone and pyridine-2-yl butanoic acid derivatives proceeds through a ring expansion and 2-azabicyclo [3.3.0]octa-2,7-diene-4,6-dione-N-oxide via the contraction of the o-quinone ring. The structure of the heterocyclic compounds obtained was justified by X-ray diffraction analysis, NMR spectroscopy, IR- and HRMS-spectrometry, and the proposed mechanisms of their formation include the participation of an intermediate product of the expansion reaction of the o-quinone cycle - 5,7-di (tert-butyl)-4-nitro-2-(quinoline-2-yl)-cyclohepta-1,3,5-triene-1,3-diol, which was first isolated preparatively. The DFT/B3LYP/6-311++G** methods were used to determine the thermodynamic stability of tautomeric forms of intermediate products, as well as the relative stability of NH and OH tautomers of 5,7-di (tert-butyl)-2-(quinolin-2-yl)-1,3-tropolone and 5,7-di (tert-butyl)-4-nitro-2-(quinolin-2-yl)-1,3-tropolone.
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Affiliation(s)
- Tatyana A. Krasnikova
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
| | - Yurii A. Sayapin
- Federal Research Centre the Southern Scientific Centre of the Russian Academy of Sciences, Rostov on Don 344006, Russian Federation
| | - Inna O. Tupaeva
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
| | - Eugeny A. Gusakov
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
| | - Ilya V. Ozhogin
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
| | - Anton V. Lisovin
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
| | - Mikhail V. Nikogosov
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
| | - Oleg P. Demidov
- North Caucasus Federal University, Stavropol 355009, Russian Federation
| | - Duong Nghia Bang
- Office of the State Council for Professorship, Ministry of Education and Training, Hanoi, 10000, Viet Nam
| | - Tran Dai Lam
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, 10000, Viet Nam
| | - Nguyen Thi Thu Trang
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, 10000, Viet Nam
| | - Alexander D. Dubonosov
- Federal Research Centre the Southern Scientific Centre of the Russian Academy of Sciences, Rostov on Don 344006, Russian Federation
| | - Vladimir I. Minkin
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov on Don 344090, Russian Federation
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Cazzaniga G, Mori M, Meneghetti F, Chiarelli LR, Stelitano G, Caligiuri I, Rizzolio F, Ciceri S, Poli G, Staver D, Ortore G, Tuccinardi T, Villa S. Virtual screening and crystallographic studies reveal an unexpected γ-lactone derivative active against MptpB as a potential antitubercular agent. Eur J Med Chem 2022; 234:114235. [DOI: 10.1016/j.ejmech.2022.114235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 02/03/2022] [Accepted: 02/23/2022] [Indexed: 11/04/2022]
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Sayapin YA, Gusakov EA, Tupaeva IO, Karlutova OY, Dubonosova IV, Tkachev VV, Starikov AG, Dubonosov AD, Aldoshin SM. 1H-indole-based chemosensors for the sequential recognition of Hg2+ and CN− ions. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Gusakov EA, Topchu IA, Mazitova AM, Dorogan IV, Bulatov ER, Serebriiskii IG, Abramova ZI, Tupaeva IO, Demidov OP, Toan DN, Lam TD, Bang DN, Boumber YA, Sayapin YA, Minkin VI. Design, synthesis and biological evaluation of 2-quinolyl-1,3-tropolone derivatives as new anti-cancer agents. RSC Adv 2021; 11:4555-4571. [PMID: 33996031 PMCID: PMC8121267 DOI: 10.1039/d0ra10610k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 01/12/2021] [Indexed: 12/24/2022] Open
Abstract
Tropolones are promising organic compounds that can have important biologic effects. We developed a series of new 2-quinolyl-1,3-tropolones derivatives that were prepared by the acid-catalyzed reaction of 4,7-dichloro-2-methylquinolines with 1,2-benzoquinones. 2-Quinolyl-1,3-tropolones have been synthesized and tested for their anti-proliferative activity against several human cancer cell lines. Two compounds (3d and mixture B of 3i-k) showed excellent activity against six cancer cell lines of different tissue of origin. The promising compounds 3d and mixture B of 3i-k also demonstrated induction of apoptotic cell death of ovarian cancer (OVCAR-3, OVCAR-8) and colon cancer (HCT 116) cell lines and affected ERK signaling. In summary, 2-quinolyl-1,3-tropolones are promising compounds for development of effective anticancer agents.
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Affiliation(s)
- Evgeniy A. Gusakov
- Institute of Physical and Organic Chemistry, Southern Federal UniversityRostov-on-Don344090Russia
| | - Iuliia A. Topchu
- Kazan Federal UniversityKazan420008Russia
- Robert H Lurie Comprehensive Cancer Center, Division of Hematology/Oncology at the Department of Medicine, Feinberg School of Medicine, Northwestern University303 E. Superior StreetChicagoIL60611USA
| | - Aleksandra M. Mazitova
- Kazan Federal UniversityKazan420008Russia
- Cedars-Sinai Medical Center, Department of MedicineLos AngelesCA90048USA
| | - Igor V. Dorogan
- Institute of Physical and Organic Chemistry, Southern Federal UniversityRostov-on-Don344090Russia
| | | | - Ilya G. Serebriiskii
- Kazan Federal UniversityKazan420008Russia
- Fox Chase Cancer CenterPhiladelphiaPA19111USA
| | | | - Inna O. Tupaeva
- Institute of Physical and Organic Chemistry, Southern Federal UniversityRostov-on-Don344090Russia
| | | | - Duong Ngoc Toan
- Thai Nguyen University of Education20 Luong Ngoc QuyenThai Nguyen 24000Vietnam
| | - Tran Dai Lam
- Institute for Tropical Technology, Vietnam Academy of Science and TechnologyHanoi10000Vietnam
| | - Duong Nghia Bang
- Thai Nguyen University of SciencesTan Thinh WardThai Nguyen 24000Vietnam
| | - Yanis A. Boumber
- Kazan Federal UniversityKazan420008Russia
- Robert H Lurie Comprehensive Cancer Center, Division of Hematology/Oncology at the Department of Medicine, Feinberg School of Medicine, Northwestern University303 E. Superior StreetChicagoIL60611USA
| | - Yurii A. Sayapin
- Federal Research Centre the Southern Scientific Centre of the Russian Academy of SciencesChekhov Ave., 41Rostov-on-Don344006Russia
| | - Vladimir I. Minkin
- Institute of Physical and Organic Chemistry, Southern Federal UniversityRostov-on-Don344090Russia
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Tkachev VV, Sayapin YA, Dorogan IV, Kolodina AA, Gusakov EA, Komissarov VN, Shilov GV, Aldoshin SM, Minkin VI. Synthesis and structure of 4,6-di(tert-butyl)-2-(4-chloro-7,8-dimethylquinolin-2-yl)-7-(piperidin-1-ylmethyl)-1,3-tropolone. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-1993-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tkachev VV, Sayapin YA, Gusakov EA, Kolodina AA, Dorogan IV, Shilov GV, Aldoshin SM, Minkin VI. Synthesis and Molecular Structures of (3-Hydroxy, 3-Chloro, 3-Arylamino)-N-acetyl-3-arylaminotropones. CRYSTALLOGR REP+ 2018. [DOI: 10.1134/s1063774518010200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Borodkin GS, Kolodina AA, Dorogan IV, Gusakov EA, Borodkina IG, Chepurnoi PB, Sayapin YA. Synthesis and structural studies of 5,7(4,6)-di(tert-butyl)-2-(6,8-dimethyl-4-chloroquinolin-2-yl)-1,3-tropolones by quantum-chemical methods and two-dimensional correlation NMR spectroscopy. DOKLADY CHEMISTRY 2017. [DOI: 10.1134/s0012500817010049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sayapin YA, Gusakov EA, Dorogan IV, Tupaeva IO, Teimurazov MG, Fursova NK, Ovchinnikov KV, Minkin VI. A new 2-(4H-1,3-benzoxazin-4-on-2-yl)-1,3-tropolone: Synthesis, structure, and antibacterial properties. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1068162016020114] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Yan Y, Ma YT, Yang J, Horsman GP, Luo D, Ji X, Huang SX. Tropolone Ring Construction in the Biosynthesis of Rubrolone B, a Cationic Tropolone Alkaloid from Endophytic Streptomyces. Org Lett 2016; 18:1254-7. [PMID: 26926531 DOI: 10.1021/acs.orglett.6b00074] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yijun Yan
- State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Ya-Tuan Ma
- State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Jing Yang
- State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Geoff P. Horsman
- Department of Chemistry & Biochemistry, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - Dan Luo
- State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Xu Ji
- State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Sheng-Xiong Huang
- State
Key Laboratory of Phytochemistry and Plant Resources in West China,
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
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Abstract
The halogen bond occurs when there is evidence of a net attractive interaction between an electrophilic region associated with a halogen atom in a molecular entity and a nucleophilic region in another, or the same, molecular entity. In this fairly extensive review, after a brief history of the interaction, we will provide the reader with a snapshot of where the research on the halogen bond is now, and, perhaps, where it is going. The specific advantages brought up by a design based on the use of the halogen bond will be demonstrated in quite different fields spanning from material sciences to biomolecular recognition and drug design.
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Affiliation(s)
- Gabriella Cavallo
- Laboratory
of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry,
Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, I-20131 Milano, Italy
| | - Pierangelo Metrangolo
- Laboratory
of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry,
Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, I-20131 Milano, Italy
- VTT-Technical
Research Centre of Finland, Biologinkuja 7, 02150 Espoo, Finland
| | - Roberto Milani
- VTT-Technical
Research Centre of Finland, Biologinkuja 7, 02150 Espoo, Finland
| | - Tullio Pilati
- Laboratory
of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry,
Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, I-20131 Milano, Italy
| | - Arri Priimagi
- Department
of Chemistry and Bioengineering, Tampere
University of Technology, Korkeakoulunkatu 8, FI-33101 Tampere, Finland
| | - Giuseppe Resnati
- Laboratory
of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry,
Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, I-20131 Milano, Italy
| | - Giancarlo Terraneo
- Laboratory
of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry,
Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Via L. Mancinelli 7, I-20131 Milano, Italy
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Sayapin YA, Tupaeva IO, Kolodina AA, Gusakov EA, Komissarov VN, Dorogan IV, Makarova NI, Metelitsa AV, Tkachev VV, Aldoshin SM, Minkin VI. 2-Hetaryl-1,3-tropolones based on five-membered nitrogen heterocycles: synthesis, structure and properties. Beilstein J Org Chem 2015; 11:2179-88. [PMID: 26664640 PMCID: PMC4661002 DOI: 10.3762/bjoc.11.236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 10/17/2015] [Indexed: 12/03/2022] Open
Abstract
A series of derivatives of 2-hetaryl-1,3-tropolone (β-tropolone) was prepared by the acid-catalyzed reaction of 2-methylbenzoxazoles, 2-methylbenzothiazoles and 2,3,3-trimethylindoline with 3,4,5,6-tetrachloro-1,2-benzoquinone. The molecular structures of the three representative compounds were determined by X-ray crystallography. In crystal and (as shown by the DFT PBE0/6-311+G** calculations) in solution, 2-hetaryl-4,5,6,7-tetrachloro- and 2-hetaryl-5,6,7-trichloro-1,3-tropolones exist in the NH-tautomeric form with a strong resonance-assisted intramolecular N–H···O hydrogen bond. The mechanism of the formation of 1,3-tropolones in the reaction of methylene-active five-membered heterocycles with o-chloranil in acetic acid solution has been studied using density functional theory (DFT) methods. The reaction of 2-(2-benzoxa(thia)zolyl)-5,6,7-trichloro(4,5,6,7-tetrachloro)-1,3-tropolones with alcohols leads to the contraction of the seven-membered tropone ring with the formation of 2-(2-benzoxa(thia)zolyl)-6-alkoxycarbonylphenols. The molecular structure of 2-(2-ethoxycarbonyl-6-hydroxy-3,4,5-trichlorophenyl)benzoxazole has been determined by X-ray diffraction. 2-(2-Benzoxa(thia)zolyl)-6-alkoxycarbonylphenols display intense green fluorescence with anomalous Stokes shifts caused by the excited state intramolecular proton transfer (ESIPT) effects.
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Affiliation(s)
- Yury A Sayapin
- Southern Scientific Center of Russian Academy of Sciences, 141 Chekhov St., 344006 Rostov on Don, Russian Federation ; Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Inna O Tupaeva
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Alexandra A Kolodina
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Eugeny A Gusakov
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Vitaly N Komissarov
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Igor V Dorogan
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Nadezhda I Makarova
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Anatoly V Metelitsa
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Valery V Tkachev
- Institute of Problems of Chemical Physics of Russian Academy of Sciences, 1 Akad. Semjonov N.N. Ave., 142432 Chernogolovka, Moscow region, Russian Federation
| | - Sergey M Aldoshin
- Institute of Problems of Chemical Physics of Russian Academy of Sciences, 1 Akad. Semjonov N.N. Ave., 142432 Chernogolovka, Moscow region, Russian Federation
| | - Vladimir I Minkin
- Southern Scientific Center of Russian Academy of Sciences, 141 Chekhov St., 344006 Rostov on Don, Russian Federation ; Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
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Unexpected formation of 6-[benzofuran-3(2H)-ylidene]-3,3a,9,9a-tetra-hydroimidazo[4,5-e]thiazolo[3,2-b][1,2,4]triazine-2,7-dione derivative. MENDELEEV COMMUNICATIONS 2015. [DOI: 10.1016/j.mencom.2015.11.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tkachev VV, Sayapin YA, Shilov GV, Utenyshev AN, Bozhenko KV, Komissarov VN, Aldoshin SM, Minkin VI. Molecular structures of new 2-(quinoline-2-yl)-1,3-tropolones. J STRUCT CHEM+ 2015. [DOI: 10.1134/s0022476615060207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Structural studies of conformers of 3-(N-acetyl-N-arylamino)tropones by heteronuclear, two-dimensional, and dynamic NMR spectroscopy and X-ray diffraction analysis. Russ Chem Bull 2015. [DOI: 10.1007/s11172-015-0913-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Mikhailov IE, Kolodina AA, Dushenko GA, Artyushkina YM, Tkachev VV, Aldoshin SM, Sayapin YA, Minkin VI. Synthesis and Structure of a New Polydentate 8-Hydroxyquinoline Ligand System with a 1,3-Tropolone Fragment at Position 2 in the Quinoline Ring. Chem Heterocycl Compd (N Y) 2014. [DOI: 10.1007/s10593-014-1537-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kravchenko AN, Gazieva GA, Vasilevskii SV, Nelyubina YV. Cascade synthesis of the first imidazo[4,5-e]-thiazolo[2,3-c][1,2,4]triazine derivative. MENDELEEV COMMUNICATIONS 2014. [DOI: 10.1016/j.mencom.2014.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Tkachev VV, Sayapin YA, Dorogan IV, Gorkovets VS, Kolodina AA, Komissarov VN, Shilov GV, Aldoshin SM, Minkin VI. Synthesis and molecular structure of 3-[5-(quinolin-2-yl)penta-1,4-dien-1-yl]-1,4-benzodioxin-2-one. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2013. [DOI: 10.1134/s1070428013030214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sayapin YA, Gusakov EA, Bang ZN, Tupaeva IO, Komissarov VN, Dorogan IV, Tkachev VV, Aldoshin SM, Minkin VI. Synthesis and structure of 3-arylamino-2-(quinolin-2-yl)tropones. Russ Chem Bull 2013. [DOI: 10.1007/s11172-013-0067-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tupaeva IO, Sayapin YA, Bang ZN, Komissarov VN, Tkachev VV, Shilov GV, Aldoshin SM, Minkin VI. Synthesis and isomerization reaction of 2-(benzoxazol-2-yl)-1,3-tropolones. Russ Chem Bull 2013. [DOI: 10.1007/s11172-013-0068-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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New 2-(benzothiazol-2-yl)-1,3-tropolones derived from 3,4,5,6-tetrachloro-1,2-benzoquinone. Russ Chem Bull 2012. [DOI: 10.1007/s11172-011-0207-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Zhang M, Ding Y, Xiong B, Wang T, Wang L. Efficient One-Pot Synthesis of 2-Alkylquinolines under Solvent-Free Conditions Using Sulfonic Acid Functionalized Ionic Liquid as a Recoverable and Reusable Catalyst. HETEROCYCLES 2011. [DOI: 10.3987/com-11-12289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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