1
|
Rosa FA, Jacomini AP, Vieira da Silva MJ, Pianoski KE, Poletto J, Francisco CB, de Souza Fernandes C, Martinelli V, Pontes RM, Back DF, Moura S, Basso EA. Controlled Pyrazole-Hydrazone Annulation: Regiodivergent Synthesis of 1 H- and 2 H-Pyrazolo[3,4- d]pyridazinones. J Org Chem 2023. [PMID: 37463494 DOI: 10.1021/acs.joc.3c01117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
An efficient and controlled site-selective annulation of 3,5-diethoxycarbonyl 4-hydrazonyl pyrazoles is described. The relative proportion of the products is affected by hydrazone intermediate configuration, reaction temperature, and Lewis acid employed. At a temperature of 110-120 °C, the reaction preferentially afforded 1H-pyrazolo[3,4-d]pyridazin-7(6H)-ones, whereas using Yb(OTf)3 in MeCN reflux, 2H-pyrazolo[3,4-d]pyridazin-7(6H)-ones were favored. Computational investigations were performed to clarify the mechanism and the origin of the regiodivergence.
Collapse
Affiliation(s)
- Fernanda Andreia Rosa
- Chemistry Departament, State University of Maringa, Maringa, Parana 87020-900, Brazil
| | | | | | | | - Julia Poletto
- Chemistry Departament, State University of Maringa, Maringa, Parana 87020-900, Brazil
| | | | | | - Vinicius Martinelli
- Chemistry Departament, State University of Maringa, Maringa, Parana 87020-900, Brazil
| | | | - Davi Fernando Back
- Chemistry Departament, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97110-970, Brazil
| | - Sidnei Moura
- Biotechnology Departament, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul 295070-560, Brazil
| | - Ernani Abicht Basso
- Chemistry Departament, State University of Maringa, Maringa, Parana 87020-900, Brazil
| |
Collapse
|
2
|
Pereira G, Mittersteiner M, Bonacorso HG, Martins MAP, Zanatta N. Regiocontrolled Synthesis of 1-Substituted-3(5)-carboxyalkyl-1 H-pyrazoles Using Trichloromethyl Enones. ACS OMEGA 2023; 8:17274-17287. [PMID: 37214703 PMCID: PMC10193424 DOI: 10.1021/acsomega.3c01879] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 04/21/2023] [Indexed: 05/24/2023]
Abstract
In this work, we present a regiocontrolled methodology to prepare 1-substituted-3(5)-carboxyalkyl-1H-pyrazoles using trichloromethyl enones as starting materials. It was found that the selectivity of the reaction depends on the nature of the hydrazine: when using arylhydrazine hydrochlorides, synthesis of the 1,3-regioisomer was achieved (22 examples, 37-97% yields), while the corresponding free hydrazine led exclusively to the 1,5-regioisomer (12 examples, 52-83% yields). The trichloromethyl group was used as a precursor for the carboxyalkyl moiety, furnishing a one-pot three-component regioselective protocol suitable for preparing both isomers at moderate to excellent yields. The selectivity of the reaction was investigated through NMR analyses and the structures of the products were unambiguously determined by SCXR analyses.
Collapse
|
3
|
Kumar R, Singh H, Mazumder A, Yadav RK. Synthetic Approaches, Biological Activities, and Structure-Activity Relationship of Pyrazolines and Related Derivatives. Top Curr Chem (Cham) 2023; 381:12. [PMID: 37029841 DOI: 10.1007/s41061-023-00422-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/22/2023] [Indexed: 04/09/2023]
Abstract
It has been established that pyrazolines and their analogs are pharmacologically active scaffolds. The pyrazoline moiety is present in several marketed molecules with a wide range of uses, which has established its importance in pharmaceutical and agricultural sectors, as well as in industry. Due to its broad-spectrum utility, scientists are continuously captivated by pyrazolines and their derivatives to study their chemistry. Pyrazolines or their analogs can be prepared by several synthesis strategies, and the focus will always be on new greener and more economical ways for their synthesis. Among these methods, chalcones, hydrazines, diazo compounds, and hydrazones are most commonly applied under different reaction conditions for the synthesis of pyrazoline and its analogs. However, there is scope for other molecules such as Huisgen zwitterions, different metal catalysts, and nitrile imine to be used as starting reagents. The present article consists of recently reported synthetic protocols, pharmacological activities, and the structure-activity relationship of pyrazoline and its derivatives, which will be very useful to researchers.
Collapse
Affiliation(s)
- Rajnish Kumar
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India.
| | - Himanshu Singh
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Avijit Mazumder
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Ranjeet Kumar Yadav
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| |
Collapse
|
4
|
Dwari S, Nath PP, Jana CK. Ring Opening of Pyrrolinium Ions Enabled Regioselective Synthesis of 4-Alkyl N-Arylpyrazoles. J Org Chem 2022; 87:11947-11957. [PMID: 36069722 DOI: 10.1021/acs.joc.2c00727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unprecedented method for the regioselective synthesis of 1,3-diaryl 4-alkyl pyrazoles has been reported. A wide variety of 1,3-diaryl 4-alkyl pyrazoles were synthesized as a single regioisomer via a ring-opening cyclization reaction of unsaturated pyrrolinium ions in the presence of arylhydrazines. This method avoids using additional alkylation steps and hazardous oxidants that generally are essential for the synthesis of 4-alkyl N-arylpyrazoles.
Collapse
Affiliation(s)
- Soumita Dwari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Partha Partim Nath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Chandan K Jana
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| |
Collapse
|
5
|
Jacob RG, Hartwig D, Nascimento JER, Abib PB, Ebersol CP, Nunes PP, Birmann PT, Casaril AM, Savegnago L, Schumacher RF. Sequential one-pot synthesis and antioxidant evaluation of 5-amino-4-(arylselanyl)-1H-pyrazoles. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
6
|
Chandrasekharan SP, Dhami A, Kumar S, Mohanan K. Recent advances in pyrazole synthesis employing diazo compounds and synthetic analogues. Org Biomol Chem 2022; 20:8787-8817. [DOI: 10.1039/d2ob01918c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review summarizes the recent developments in the construction of pyrazoles using diazo compounds, nitrile imines and their synthetic equivalents.
Collapse
Affiliation(s)
- Sanoop P. Chandrasekharan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Anamika Dhami
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Sandeep Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Kishor Mohanan
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research, Ghaziabad-201002, India
| |
Collapse
|
7
|
Mittersteiner M, Farias FFS, Bonacorso HG, Martins MAP, Zanatta N. Ultrasound-assisted synthesis of pyrimidines and their fused derivatives: A review. ULTRASONICS SONOCHEMISTRY 2021; 79:105683. [PMID: 34562732 PMCID: PMC8473776 DOI: 10.1016/j.ultsonch.2021.105683] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 07/12/2021] [Accepted: 07/20/2021] [Indexed: 06/09/2023]
Abstract
The pyrimidine scaffold is present in many bioactive drugs; therefore, efficient synthetic routes that provide shorter reaction times, higher yields, and site-selective reactions are constantly being sought. Ultrasound (US) irradiation has emerged as an alternative energy source in the synthesis of these heterocyclic scaffolds, and over the last ten years there has been a significant increase in the number of publications mentioning US in either the construction or derivatization of the pyrimidine core. This review presents a detailed summary (with 140 references) of the effects of US (synergic or not) on the construction and derivatization of the pyrimidine core through classical reactions (e.g., multicomponent, cyclocondensation, cycloaddition, and alkylation reactions). The main points that were taken into consideration are as follows: chemo- and regioselectivity issues, and the results of conventional heating methods compared to US and mechanistic insights that are also presented and discussed for key reactions.
Collapse
Affiliation(s)
- Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil.
| | - Fellipe F S Farias
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Helio G Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil.
| |
Collapse
|
8
|
Discovery of 1,3,4,5-tetrasubstituted pyrazoles as anti-trypanosomatid agents: Identification of alterations in flagellar structure of L. amazonensis. Bioorg Chem 2021; 114:105082. [PMID: 34147880 DOI: 10.1016/j.bioorg.2021.105082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/28/2021] [Accepted: 06/09/2021] [Indexed: 02/07/2023]
Abstract
Trypanosoma cruzi and Leishmania species are causative agents of Chagas disease and Leishmaniasis, respectively, known as Neglected Tropical Diseases. Up to now, the treatments are inadequate and based on old drugs. Thus, we report herein the discovery of 1,3,4,5-tetrasubstituted pyrazole derivatives that presented potent and selective inhibition against promastigote forms of L. amazonensis, and epimastigote forms of T. cruzi. The structure-activity relationship led to the identification of three compounds (2m, 2n and 2p) with an in vitro IC50 of 7.4 µM (selective index - SI ≥ 133.0), 3.8 µM (SI in the range of 148.4 to 200.8), and 7.3 µM (SI in the range of 87.2 to 122.4) against L. amazonensis, respectively. Also, those compounds exhibited in vitro IC50 of 9.7 µM (SI ≥ 101.5), 4.5 µM (SI in the range of 125.3 to 169.6) and 17.1 µM (SI in the range of 37.2 to 52.2) against T. cruzi, respectively. A preliminary study about the reaction mechanism in promastigotes showed that 2n caused an increase of the production of ROS and of lipid storage bodies. Furthermore, 2n induced abnormalities in the flagellum that may have an impact on the parasite motility.
Collapse
|
9
|
|
10
|
Mittersteiner M, Andrade VP, Bonacorso HG, Martins MAP, Zanatta N. The Wonderful World of β‐Enamino Diketones Chemistry. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001039] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Valquiria P. Andrade
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| |
Collapse
|
11
|
da Silva MJV, Jacomini AP, Figueiredo MC, Back DF, Foglio MA, Ruiz ALTG, Paula FR, Rosa FA. Efficient synthesis and antitumor evaluation of 4-aminomethyl-N-arylpyrazoles: Discovery of potent and selective agents for ovarian cancer. Bioorg Med Chem 2020; 29:115835. [PMID: 33214037 DOI: 10.1016/j.bmc.2020.115835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 09/14/2020] [Accepted: 10/28/2020] [Indexed: 02/07/2023]
Abstract
A new one-pot two-step sequential methodology for synthesis of novel 3-carboxyethyl 4-[(tert-butylamino)methyl]-N-arylpyrazole derivatives is reported. One-pot transformation of β-enamino diketones and arylhydrazines generated 4-iminium-N-arylpyrazole salt intermediates in situ, which were easily transformed into 4-[(tert-butylamino)methyl]-N-arylpyrazole derivatives by NaBH3CN. The products could be isolated in the free or hydrochloride salt forms. Also, it was possible to obtain the products in the zwitterionic form by ester group hydrolysis. Furthermore, all synthesised compounds were evaluated in vitro against a panel of eight human tumor cell lines. The 4-[(tert-butylamino)methyl]-N-arylpyrazole derivatives were much more powerful than the hydrochloride and zwitterionic forms. Moreover, the results suggest that the N-aryl group at the pyrazole ring is vital for modulating antiproliferative activity. The 3-carboxyethyl 4-[(tert-butylamino)methyl]-N-phenylpyrazoles 3a-g exhibited higher inhibitory activities against OVCAR-3, with GI50 values of 0.013-8.78 μM, and lower inhibitory activities against normal human cell lines. Molecular docking was performed to evaluate the probable binding mode of 3a into active site of CDK2.
Collapse
Affiliation(s)
- Michael J V da Silva
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Andrey P Jacomini
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Mariana C Figueiredo
- Faculdade de Ciências Farmacêuticas, Universidade Estadual de Campinas (UNICAMP), 13083-859 Campinas, SP, Brazil
| | - Davi F Back
- Departamento de Química, Universidade Federal de Santa Maria (UFSM), 97110-970 Santa Maria, RS, Brazil
| | - Mary A Foglio
- Faculdade de Ciências Farmacêuticas, Universidade Estadual de Campinas (UNICAMP), 13083-859 Campinas, SP, Brazil
| | - Ana L T G Ruiz
- Faculdade de Ciências Farmacêuticas, Universidade Estadual de Campinas (UNICAMP), 13083-859 Campinas, SP, Brazil; Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas (CPQBA), Universidade Estadual de Campinas, 13083-970 Campinas, SP, Brazil
| | - Fávero R Paula
- Departamento de Farmácia, Universidade Federal do Pampa (UNIPAMPA), 97500-970 Uruguaiana, RS, Brazil
| | - Fernanda A Rosa
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil.
| |
Collapse
|
12
|
Andrade VP, Mittersteiner M, Bonacorso HG, Martins MAP, Zanatta N. Divergent and Regioselective Synthesis of (Trifluoromethyl/carboxyethyl)benzo[4,5]imidazo[1,2‐
a
]pyrimidines from β‐Enamino Diketones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Valquiria P. Andrade
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| |
Collapse
|
13
|
Andrade VP, Mittersteiner M, Bonacorso HG, Martins MAP, Zanatta N. Trifluoromethyl β‐Enamino Diketones as Dual Substrates for the Synthesis of 5‐Benzoyl‐6‐(trifluoromethyl)pyrimidines and their Pyrimidin‐4(3
H
)‐one Analogues. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000879] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Valquiria P. Andrade
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE) Departmento de Química Universidade Federal de Santa Maria 97105‐900 Santa Maria RS Brazil
| |
Collapse
|
14
|
Gonçalves DS, de S Melo SM, Jacomini AP, J V da Silva M, Pianoski KE, Ames FQ, Aguiar RP, Oliveira AF, Volpato H, Bidóia DL, Nakamura CV, Bersani-Amado CA, Back DF, Moura S, Paula FR, Rosa FA. Synthesis of novel 3,5,6-trisubstituted 2-pyridone derivatives and evaluation for their anti-inflammatory activity. Bioorg Med Chem 2020; 28:115549. [PMID: 32503692 DOI: 10.1016/j.bmc.2020.115549] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/26/2020] [Accepted: 05/05/2020] [Indexed: 11/19/2022]
Abstract
The inflammatory response is the reaction of living tissue to an injury of a foreign nature, such as infection and irritants, and occurs as part of the body's natural defence response. Compounds capable of inhibiting cyclooxygenase (COX) enzymes, especially COX-2, have great potential as anti-inflammatory agents. Herein we present the regioselective synthesis of 49 novel compounds based on the 2-pyridone nucleus. The topical anti-inflammatory activity of seventeen compounds was evaluated in mice by croton oil (CO) induced ear edema assay. Most of the compounds exhibited a high level of in vivo anti-inflammatory activity, reducing ear edema and myeloperoxidase (MPO) activity. The most active compounds (2a and 7a) were inhibitors of COX enzymes. Compound 2a selectively inhibited the COX-2, while 7a was nonselective. Further, the compound 2a showed effective binding at the active site of COX-2 co-crystal by docking molecular study.
Collapse
Affiliation(s)
- Davana S Gonçalves
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Samara M de S Melo
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Andrey P Jacomini
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Michael J V da Silva
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Karlos E Pianoski
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Franciele Q Ames
- Departamento de Farmacologia e Terapêutica, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Rafael P Aguiar
- Departamento de Farmacologia e Terapêutica, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Alisson Felipe Oliveira
- Departamento de Farmácia, Universidade Federal do Pampa (UNIPAMPA), 97500-970 Uruguaiana, RS, Brazil
| | - Hélito Volpato
- Pós-Graduação em Ciências Biológicas, Universidade Estadual de Maringá (UEM), 87020-900 Maringá, PR, Brazil
| | - Danielle L Bidóia
- Pós-Graduação em Ciências Biológicas, Universidade Estadual de Maringá (UEM), 87020-900 Maringá, PR, Brazil
| | - Celso V Nakamura
- Pós-Graduação em Ciências Biológicas, Universidade Estadual de Maringá (UEM), 87020-900 Maringá, PR, Brazil
| | - Ciomar A Bersani-Amado
- Departamento de Farmacologia e Terapêutica, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Davi F Back
- Departamento de Química, Universidade Federal de Santa Maria (UFSM), 97110-970 Santa Maria, RS, Brazil
| | - Sidnei Moura
- Instituto de Biotecnologia, Universidade de Caxias do Sul (UCS), 295070-560 Caxias do Sul, RS, Brazil
| | - Fávero R Paula
- Departamento de Farmácia, Universidade Federal do Pampa (UNIPAMPA), 97500-970 Uruguaiana, RS, Brazil
| | - Fernanda A Rosa
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil.
| |
Collapse
|
15
|
Pianoski KE, Poletto J, Vieira da Silva MJ, Ascencio Camargo JN, Jacomini AP, Gonçalves DS, Back DF, Moura S, Rosa FA. 1,2-Addition to trifluoromethylated β-enamino diketones: regioselective synthesis of trifluoromethyl-containing azomethine pyrazoles and isoxazoles. Org Biomol Chem 2020; 18:2524-2537. [DOI: 10.1039/d0ob00319k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Trifluoromethylated β-enamino diketones undergo type 1,2-addition leading to regioselective synthesis of trifluoromethylated azoles containing an azomethine group.
Collapse
Affiliation(s)
| | - Julia Poletto
- Departamento de Química
- Universidade Estadual de Maringá (UEM)
- Maringá
- Brazil
| | | | | | | | | | - Davi Fernando Back
- Departamento de Química
- Universidade Federal de Santa Maria (UFSM)
- 97110-970 - Santa Maria
- Brazil
| | - Sidnei Moura
- Instituto de Biotecnologia
- Universidade de Caxias do Sul (UCS)
- Caxias do Sul
- Brazil
| | | |
Collapse
|
16
|
Poletto J, Ribeiro GM, da Silva MJV, Jacomini AP, Basso EA, Back DF, Moura S, Rosa FA. One-Pot Highly Regioselective Synthesis of α-Ketoamide N-Arylpyrazoles from Secondary β-Enamino Diketones. Org Lett 2019; 21:6325-6328. [DOI: 10.1021/acs.orglett.9b02206] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julia Poletto
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Gessica M. Ribeiro
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Michael J. V. da Silva
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Andrey P. Jacomini
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Ernani A. Basso
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| | - Davi F. Back
- Departamento de Química, Universidade Federal de Santa Maria (UFSM), 97110-970 Santa Maria, RS, Brazil
| | - Sidnei Moura
- Instituto de Biotecnologia, Universidade de Caxias do Sul (UCS), 295070-560 Caxias do Sul, RS, Brazil
| | - Fernanda A. Rosa
- Departamento de Química, Universidade Estadual de Maringá (UEM), 87030-900 Maringá, PR, Brazil
| |
Collapse
|
17
|
Obydennov DL, Chernyshova EV, Sosnovskikh VY. Self-Condensation of Enaminodiones as a Method for Benzene Ring Construction: Synthesis of Diacyl-Substituted Phenols and Catechols. J Org Chem 2019; 84:6491-6501. [DOI: 10.1021/acs.joc.9b00623] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Dmitrii L. Obydennov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russian Federation
| | - Elena V. Chernyshova
- Institute of Natural Sciences and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russian Federation
| | - Vyacheslav Y. Sosnovskikh
- Institute of Natural Sciences and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russian Federation
| |
Collapse
|
18
|
Silva RGM, da Silva MJV, Jacomini AP, Moura S, Back DF, Basso EA, Rosa FA. Development of methodologies for the regioselective synthesis of four series of regioisomer isoxazoles from β-enamino diketones. RSC Adv 2018; 8:4773-4778. [PMID: 35539545 PMCID: PMC9077875 DOI: 10.1039/c7ra13343j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 01/20/2018] [Indexed: 12/19/2022] Open
Abstract
Four methodologies are reported for the regioselective synthesis of four series of regioisomer isoxazoles from cyclocondensation of β-enamino diketones and hydroxylamine hydrochloride. Regiochemical control was achieved by varying reaction conditions and substrate structure. The mild reaction conditions used to access 4,5-disubstituted, 3,4-disubtituted, and 3,4,5-trisubstituted regioisomer isoxazoles, as well as the pharmacological and synthetic potential of the products, make these novel methodologies very powerful. Efficient and regioselective synthesis of isoxazoles was demonstrated through cyclocondensation of β-enamino diketones with hydroxylamine: four of the six possible regioisomers were obtained.![]()
Collapse
Affiliation(s)
- Raí G. M. Silva
- Departamento de Química
- Universidade Estadual de Maringá (UEM)
- Brazil
| | | | | | - Sidnei Moura
- Laboratório de Produtos Naturais e Sintéticos
- Instituto de Biotecnologia
- Universidade de Caxias do Sul (UCS)
- Caxias do Sul
- Brazil
| | - Davi F. Back
- Departamento de Química
- Universidade Federal de Santa Maria (UFSM)
- Santa Maria
- Brazil
| | - Ernani A. Basso
- Departamento de Química
- Universidade Estadual de Maringá (UEM)
- Brazil
| | - Fernanda A. Rosa
- Departamento de Química
- Universidade Estadual de Maringá (UEM)
- Brazil
| |
Collapse
|