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Ribeiro JLP, Costa I, Silva R, Lopes SMM, Saraiva L, Pinho E Melo TMVD. 3-Tetrazolyl-β-carboline derivatives as potential neuroprotective agents. Bioorg Med Chem 2024; 111:117841. [PMID: 39094526 DOI: 10.1016/j.bmc.2024.117841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 07/11/2024] [Accepted: 07/15/2024] [Indexed: 08/04/2024]
Abstract
3-Tetrazolyl-β-carbolines were prepared by the Pictet-Spengler approach using a tryptophan analogue as building block, in which the carboxylic acid was replaced by the bioisosteric tetrazole group. Knowing that β-carbolines are often associated with psychopharmacological effects, the study of the 3-tetrazolyl-β-carbolines as potential neuroprotective agents against Parkinson's disease was investigated. The evaluation of neuroprotective effects against 1-methyl-4-phenylpyridin-1-ium (MPP+)-induced cytotoxicity allowed to identify compounds with relevant neuroprotective activity. One derivative, 3-(1-benzyl-1H-tetrazol-5-yl)-1-(p-dimethylaminophenyl)-β-carboline, stood out for its low cytotoxicity and excellent performance, preventing cell death induced by this neurotoxin. The most promising compounds were also evaluated for their neuroprotective properties against iron (III)-induced cytotoxicity. However, only one 3-tetrazolyl-β-carboline derivative slightly reduced iron-induced cytotoxicity. Overall, the neuroprotective properties of 3-tetrazolyl-β-carbolines have been demonstrated and this finding may contribute to the development of new therapies for Parkinson's disease.
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Affiliation(s)
- João L P Ribeiro
- University of Coimbra, Coimbra Chemistry Centre-Institute of Molecular Sciences, and Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Inês Costa
- UCIBIO - Applied Molecular Biosciences Unit, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, Porto University, Porto, Portugal; Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, Porto University, Porto, Portugal
| | - Renata Silva
- UCIBIO - Applied Molecular Biosciences Unit, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, Porto University, Porto, Portugal; Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, Porto University, Porto, Portugal
| | - Susana M M Lopes
- University of Coimbra, Coimbra Chemistry Centre-Institute of Molecular Sciences, and Department of Chemistry, 3004-535 Coimbra, Portugal
| | - Lucília Saraiva
- LAQV/REQUIMTE, Laboratory of Microbiology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Teresa M V D Pinho E Melo
- University of Coimbra, Coimbra Chemistry Centre-Institute of Molecular Sciences, and Department of Chemistry, 3004-535 Coimbra, Portugal.
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2
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Benzi A, Lopes SMM, Nunes SCC, Giorgi G, Bianchi L, Tavani C, Pais AACC, Petrillo G, Pinho e Melo TMVD. Reactivity of ethyl nitrosoacrylate toward pyrrole, indole and pyrrolo[3,2- c]carbazole: an experimental and theoretical study. Front Chem 2023; 11:1229669. [PMID: 37614704 PMCID: PMC10443595 DOI: 10.3389/fchem.2023.1229669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 07/26/2023] [Indexed: 08/25/2023] Open
Abstract
Nitrosoalkenes react with 8-methyl-1,6-dihydropyrrolo[3,2-c]carbazole to give both 2- and 3-alkylated products via hetero-Diels-Alder reaction followed by the cycloadduct ring-opening. Quantum chemical calculations, at DFT level of theory, were carried out to investigate the regioselectivity of the cycloaddition of ethyl nitrosoacrylate with 1,6-dihydropyrrolo[3,2-c]carbazoles as well as with pyrrole and indole, allowing a more comprehensive analysis of the reactivity pattern of nitrosoalkenes with five-membered heterocycles. Furthermore, theoretical calculations confirmed that ethyl nitrosoacrylate reacts with these heterocycles via a LUMOheterodiene-HOMOdienophile controlled cycloaddition. The reactivity of one of the oxime-functionalized 1,6-dihydropyrrolo[3,2-c]carbazole was explored and a new hexahydropyrido[4',3':4,5]pyrrolo[3,2-c]carbazole system was obtained in high yield via a one-pot, two-step procedure.
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Affiliation(s)
- Alice Benzi
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Susana M. M. Lopes
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Sandra C. C. Nunes
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Gianluca Giorgi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Lara Bianchi
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Cinzia Tavani
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Alberto A. C. C. Pais
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Giovanni Petrillo
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Teresa M. V. D. Pinho e Melo
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
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3
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3-(1,2,3-Triazol-4-yl)-β-Carbolines and 3-(1 H-Tetrazol-5-yl)-β-Carbolines: Synthesis and Evaluation as Anticancer Agents. Pharmaceuticals (Basel) 2022; 15:ph15121510. [PMID: 36558961 PMCID: PMC9785278 DOI: 10.3390/ph15121510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/28/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
Herein, the synthesis and anticancer activity evaluation of a series of novel β-carbolines is reported. The reactivity of nitrosoalkenes towards indole was explored for the synthesis of novel tryptophan analogs where the carboxylic acid was replaced by a triazole moiety. This tryptamine was used in the synthesis of 3-(1,2,3-triazol-4-yl)-β-carbolines via Pictet-Spengler condensation followed by an oxidative step. A library of compounds, including the novel 3-(1,2,3-triazol-4-yl)-β-carbolines as well as methyl β-carboline-3-carboxylate and 3-tetrazolyl-β-carboline derivatives, was evaluated for their antiproliferative activity against colorectal cancer cell lines. The 3-(1H-tetrazol-5-yl)-β-carbolines stood out as the most active compounds, with values of half-maximal inhibitory concentration (IC50) ranging from 3.3 µM to 9.6 µM against colorectal adenocarcinoma HCT116 and HT29 cell lines. The results also revealed a mechanism of action independent of the p53 pathway. Further studies with the 3-tetrazolyl-β-carboline derivative, which showed high selectivity for cancer cells, revealed IC50 values below 8 μM against pancreatic adenocarcinoma PANC-1, melanoma A375, hepatocarcinoma HEPG2, and breast adenocarcinoma MCF-7 cell lines. Collectively, this work discloses the 3-tetrazolyl-β-carboline derivative as a promising anticancer agent worthy of being further explored in future works.
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Ethyl 7-Acetyl-8a-methyl-3-(1-phenyl-1H-tetrazol-5-yl)-1,4,4a,5,6,8a-hexahydro-7H-pyrano[2,3-c]pyridazine-1-carboxylate. MOLBANK 2022. [DOI: 10.3390/m1338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The Diels–Alder reaction of ethyl 3-(1-phenyl-1H-tetrazol-5-yl-1,2-diaza-1,3-butadiene-1-carboxylate with 2-acetyl-6-methyl-2,3-dihydro-4H-pyran (methyl vinyl ketone dimer) regioselectively afforded the corresponding 3-(tetrazol-5-yl)-hexahydro-7H-pyrano[2,3-c]pyridazine in quantitative yield. An X-ray crystal structure of this cycloadduct is reported.
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Shen LW, Wang ZH, You Y, Zhao JQ, Zhou MQ, Yuan WC. α-Nitrosostyrenes as Three-Atom Units for the (3+1) Cyclization Reaction: Facile Access to 2,3-Dihydrodiazete N-Oxides and Their Diversified Synthetic Conversions. Org Lett 2022; 24:1094-1099. [PMID: 35077186 DOI: 10.1021/acs.orglett.2c00024] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An unprecedented (3+1) cyclization of α-nitrosostyrenes, generated in situ from α-bromooximes, and N-tosyloxycarbamates was developed, which enables the synthesis of a range of structurally unique and hitherto unexplored 2,3-dihydrodiazete N-oxides in moderate to high yields. The products possess a highly strained four-membered ring structure containing two nitrogen atoms. The synthetic applicability of the products was also demonstrated by many important conversions to diverse nitrogen-containing compounds.
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Affiliation(s)
- Li-Wen Shen
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China.,National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen-Hua Wang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Yong You
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Jian-Qiang Zhao
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Ming-Qiang Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei-Cheng Yuan
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
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Sathishkumar S, Gayathri K. Synthesis of Tetrazole Derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s107042802103012x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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New 3-tetrazolyl-β-carbolines and β-carboline-3-carboxylates with anti-cancer activity. Eur J Med Chem 2019; 179:123-132. [DOI: 10.1016/j.ejmech.2019.05.085] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/24/2019] [Accepted: 05/29/2019] [Indexed: 12/28/2022]
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8
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Lopes SMM, Cardoso AL, Lemos A, Pinho E Melo TMVD. Recent Advances in the Chemistry of Conjugated Nitrosoalkenes and Azoalkenes. Chem Rev 2018; 118:11324-11352. [PMID: 30495939 DOI: 10.1021/acs.chemrev.8b00375] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This review aims to present the most recent contributions in the chemistry of nitrosoalkenes and azoalkenes, highlighting the chemical behavior that makes them important and versatile building blocks in organic synthesis. These are heterodienes used in the assembly of a variety of heterocyclic systems, spanning from five- to seven-membered heterocycles, as well as for the functionalization of heterocycles.
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Affiliation(s)
- Susana M M Lopes
- CQC and Department of Chemistry , University of Coimbra , 3004-535 Coimbra , Portugal
| | - Ana L Cardoso
- CQC and Department of Chemistry , University of Coimbra , 3004-535 Coimbra , Portugal
| | - Américo Lemos
- Centro de Investigação em Química do Algarve, Faculdade de Ciências e Tecnologia , University of Algarve , Campus de Gambelas, 8005-139 Faro , Portugal
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9
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Lopes SMM, Novais JS, Costa DCS, Castro HC, Figueiredo AMS, Ferreira VF, Pinho E Melo TMVD, da Silva FDC. Hetero-Diels-Alder reactions of novel 3-triazolyl-nitrosoalkenes as an approach to functionalized 1,2,3-triazoles with antibacterial profile. Eur J Med Chem 2017; 143:1010-1020. [PMID: 29232578 DOI: 10.1016/j.ejmech.2017.11.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 11/05/2017] [Accepted: 11/19/2017] [Indexed: 12/20/2022]
Abstract
The generation and reactivity of 3-triazolyl-nitrosoalkenes are reported for the first time. The study showed that hetero-Diels-Alder reaction of these heterodienes is an interesting synthetic strategy to functionalized 1,2,3-triazoles, including 1,2,3-triazolyl-pyrroles, 1,2,3-triazolyl-dipyrromethanes and 1,2,3-triazolyl-indoles. The evaluation of the antibacterial profile against Gram-positive and Gram-negative strains revealed the new 5,5'-diethyldipyrromethane bearing a side chain incorporating a triazole and oxime moieties. The antibacterial profile detected was within the Clinical and Laboratory Standard Institute (CLSI) range and against important Staphylococcus species including Methicillin-resistant strain (S. aureus ATCC 25923, S. epidermidis ATCC 12228 and S. simulans ATCC 27851 and MRSA). Interestingly, this new 1,2,3-triazole presented hemocompatibility and low in silico toxicity profile similar to antibiotics current in use. It also has an usual antibiofilm activity against MRSA, which reinforced its potential as a new antibacterial prototype.
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Affiliation(s)
- Susana M M Lopes
- CQC and Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Juliana S Novais
- Universidade Federal Fluminense, PPBI, Instituto de Biologia, Campus Valonguinho, 24210130, Niterói, RJ, Brazil
| | - Dora C S Costa
- Universidade Federal Fluminense, Departamento de Química Orgânica, Instituto de Química, Campus do Valonguinho, 24020-150, Niterói, RJ, Brazil
| | - Helena C Castro
- Universidade Federal Fluminense, PPBI, Instituto de Biologia, Campus Valonguinho, 24210130, Niterói, RJ, Brazil
| | - Agnes Marie S Figueiredo
- Universidade Federal do Rio de Janeiro, Instituto de Microbiologia Professor Paulo de Góes, Departamento de Microbiologia Médica, Rio de Janeiro, Brazil
| | - Vitor F Ferreira
- Universidade Federal Fluminense, Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, Niterói, RJ, 24241-002, Brazil
| | | | - Fernando de Carvalho da Silva
- Universidade Federal Fluminense, Departamento de Química Orgânica, Instituto de Química, Campus do Valonguinho, 24020-150, Niterói, RJ, Brazil.
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10
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Boyko YD, Dorokhov VS, Sukhorukov AY, Ioffe SL. Conjugated nitrosoalkenes as Michael acceptors in carbon-carbon bond forming reactions: a review and perspective. Beilstein J Org Chem 2017; 13:2214-2234. [PMID: 29114327 PMCID: PMC5669230 DOI: 10.3762/bjoc.13.220] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/18/2017] [Indexed: 01/10/2023] Open
Abstract
Despite of their chemical instability and high reactivity, conjugated nitrosoalkenes are useful intermediates in target-oriented organic synthesis. The present review deals with carbon-carbon bond forming reactions involving Michael addition to α-nitrosoalkenes with a particular focus on recent developments in this methodology and its use in total synthesis.
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Affiliation(s)
- Yaroslav Dmitrievich Boyko
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russia
- Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, 125047, Miusskaya sq., 9, Moscow, Russia
| | - Valentin Sergeevich Dorokhov
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russia
- Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, 125047, Miusskaya sq., 9, Moscow, Russia
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russia
- Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, 125047, Miusskaya sq., 9, Moscow, Russia
| | - Sema Leibovich Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russia
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11
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Jorda R, Lopes SMM, Řezníčková E, Kryštof V, Pinho e Melo TMVD. Biological Evaluation of Dipyrromethanes in Cancer Cell Lines: Antiproliferative and Pro-apoptotic Properties. ChemMedChem 2017; 12:701-711. [DOI: 10.1002/cmdc.201700152] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 04/05/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Radek Jorda
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research; Palacký University & Institute of Experimental Botany ASCR; Šlechtitelů 27 78371 Olomouc Czech Republic
| | - Susana M. M. Lopes
- CQC and Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
| | - Eva Řezníčková
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research; Palacký University & Institute of Experimental Botany ASCR; Šlechtitelů 27 78371 Olomouc Czech Republic
| | - Vladimír Kryštof
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research; Palacký University & Institute of Experimental Botany ASCR; Šlechtitelů 27 78371 Olomouc Czech Republic
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12
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Hetero-Diels-Alder approach to Bis(indolyl)methanes. Bioorg Med Chem 2017; 25:1122-1131. [DOI: 10.1016/j.bmc.2016.12.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/02/2016] [Accepted: 12/16/2016] [Indexed: 11/19/2022]
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13
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Ostrovskii V, Popova E, Trifonov R. Developments in Tetrazole Chemistry (2009–16). ADVANCES IN HETEROCYCLIC CHEMISTRY 2017. [DOI: 10.1016/bs.aihch.2016.12.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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15
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Grosso C, Cardoso AL, Lemos A, Varela J, Rodrigues MJ, Custódio L, Barreira L, Pinho e Melo TM. Novel approach to bis(indolyl)methanes: De novo synthesis of 1-hydroxyiminomethyl derivatives with anti-cancer properties. Eur J Med Chem 2015; 93:9-15. [DOI: 10.1016/j.ejmech.2015.01.050] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 01/22/2015] [Accepted: 01/24/2015] [Indexed: 11/17/2022]
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16
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Nunes SCC, Lopes SMM, Gomes CSB, Lemos A, Pais AACC, Pinho e Melo TMVD. Reactions of Nitrosoalkenes with Dipyrromethanes and Pyrroles: Insight into the Mechanistic Pathway. J Org Chem 2014; 79:10456-65. [DOI: 10.1021/jo502095k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandra C. C. Nunes
- Department
of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Susana M. M. Lopes
- Department
of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Clara S. B. Gomes
- Centro
de Química Estrutural, Departamento de Engenharia Química,
Instituto Superior Técnico, University of Lisbon, 1049-001 Lisboa, Portugal
| | - Américo Lemos
- CIQA,
FCT, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
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18
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Lopes SMM, Lemos A, Pinho e Melo TMVD. Reactivity of Dipyrromethanes towards Azoalkenes: Synthesis of Functionalized Dipyrromethanes, Calix[4]pyrroles, and Bilanes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402944] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Nakano T, Miyazaki K, Kamimura A. Preparation of 2,3-Dihydrofurans via a Double Allylic Substitution Reaction of Allylic Nitro Compounds. J Org Chem 2014; 79:8103-9. [PMID: 25093914 DOI: 10.1021/jo5013042] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Toshiki Nakano
- Department
of Applied Molecular
Bioscience, Graduate School of Medicine, Yamaguchi University, 2-16-1, Tokiwadai, Ube 755-8611, Japan
| | - Koichiro Miyazaki
- Department
of Applied Molecular
Bioscience, Graduate School of Medicine, Yamaguchi University, 2-16-1, Tokiwadai, Ube 755-8611, Japan
| | - Akio Kamimura
- Department
of Applied Molecular
Bioscience, Graduate School of Medicine, Yamaguchi University, 2-16-1, Tokiwadai, Ube 755-8611, Japan
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20
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Cardoso AL, Gimeno L, Lemos A, Palacios F, Pinho e Melo TMVD. The Neber Approach to 2-(Tetrazol-5-yl)-2H-Azirines. J Org Chem 2013; 78:6983-91. [DOI: 10.1021/jo4006552] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana Lúcia Cardoso
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Lourdes Gimeno
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Américo Lemos
- CIQA, FCT, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Francisco Palacios
- Department of Organic Chemistry
I, Faculty of Pharmacy, University of the Basque Country, Paseo de la Universidad 7, 01006 Vitoria, Spain
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Pereira NA, Lemos A, Serra AC, Pinho e Melo TM. Functionalization of dipyrromethanes via hetero-Diels–Alder reaction with azo- and nitrosoalkenes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Lopes SMM, Brigas AF, Palacios F, Lemos A, Pinho e Melo TMVD. [4+2] Cycloadditions of 3-Tetrazolyl-1,2-diaza-1,3-butadienes: Synthesis of 3-Tetrazolyl-1,4,5,6-tetrahydropyridazines. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101826] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Lopes SM, Palacios F, Lemos A, Pinho e Melo TM. Diels–Alder reactions of 3-(1H-tetrazol-5-yl)-nitrosoalkenes: synthesis of functionalized 5-(substituted)-1H-tetrazoles. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Samai S, Chandra Nandi G, Chowdhury S, Singh MS. l-Proline catalyzed synthesis of densely functionalized pyrido[2,3-d]pyrimidines via three-component one-pot domino Knoevenagel aza-Diels–Alder reaction. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.051] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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