1
|
Yao YF, Song JW, Zhang CP. Base-mediated synthesis of aryl enol ethers from α-aryl allylic alcohols and arylsulfonium salts. Org Biomol Chem 2024. [PMID: 39234762 DOI: 10.1039/d4ob01220h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
A concise synthesis of aryl enol ethers from allylic alcohols and arylsulfonium salts by simply using an inorganic base as a mediator is described. The reaction enabled the facile conversion of various α-aryl allylic alcohols into the corresponding aryl enol ethers in good yields with excellent selectivity. The results demonstrated that both symmetric triarylsulfonium triflate and 10-methyl-5-aryl-5,10-dihydrophenothiazin-5-ium salts were effective arylation reagents for the base-initiated selective O-arylation and isomerization of α-aryl allylic alcohols. This reaction represents the first use of arylsulfonium salts as arylation reagents to access aryl enol ethers directly from allylic alcohols.
Collapse
Affiliation(s)
- Yu-Fei Yao
- School of Chemistry, Chemical Engineering and Life Science, Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases, Wuhan University of Technology, Wuhan 430070, China.
| | - Jia-Wei Song
- School of Chemistry, Chemical Engineering and Life Science, Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases, Wuhan University of Technology, Wuhan 430070, China.
| | - Cheng-Pan Zhang
- School of Chemistry, Chemical Engineering and Life Science, Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases, Wuhan University of Technology, Wuhan 430070, China.
| |
Collapse
|
2
|
Bibik YS, Khomenko DM, Doroshchuk RO, Raspertova IV, Bargan A, Lampeka RD. Synthesis and crystal structure of N1, N2-di-methyl-ethane-dihydrazide. Acta Crystallogr E Crystallogr Commun 2024; 80:148-151. [PMID: 38333116 PMCID: PMC10848980 DOI: 10.1107/s2056989024000239] [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: 12/15/2023] [Accepted: 01/07/2024] [Indexed: 02/10/2024]
Abstract
The title compound, N 1,N 2-di-methyl-ethane-dihydrazide, C4H10N4O2, was obtained by the methyl-ation of oxalyl dihydrazide protected with phthalimide. The mol-ecule is essentially non-planar with a dihedral angle between the two planar hydrazide fragments of 86.5 (2)°. This geometry contributes to the formation of a multi-contact three-dimensional supra-molecular network via C-H⋯O, N-H⋯O and N-H⋯N hydrogen bonds.
Collapse
Affiliation(s)
- Yurii S. Bibik
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
| | - Dmytro M. Khomenko
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
- Enamine Ltd., Winston Churchill St 78, Kyiv 02094, Ukraine
| | - Roman O. Doroshchuk
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
- Enamine Ltd., Winston Churchill St 78, Kyiv 02094, Ukraine
| | - Ilona V. Raspertova
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
- Enamine Ltd., Winston Churchill St 78, Kyiv 02094, Ukraine
| | - Alexandra Bargan
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Rostyslav D. Lampeka
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
| |
Collapse
|
3
|
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
|
4
|
Mittersteiner M, Pereira GS, Wessjohann LA, Bonacorso HG, Martins MAP, Zanatta N. Chemoselective O-Alkylation of 4-(Trifluoromethyl)pyrimidin-2(1 H)-ones Using 4-(Iodomethyl)pyrimidines. ACS OMEGA 2022; 7:18930-18939. [PMID: 35694463 PMCID: PMC9178747 DOI: 10.1021/acsomega.2c01925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/11/2022] [Indexed: 06/09/2023]
Abstract
This study reports two strategies for preparing O-alkyl derivatives of 6-substituted-4-(trifluoromethyl)pyrimidin-(1H)-ones: a linear protocol of alkylation, using a CCC-building block followed by [3 + 3]-type cyclocondensation with 2-methylisothiourea sulfate and a convergent protocol based on direct alkylation, using 4-(iodomethyl)-2-(methylthio)-6-(trihalomethyl)pyrimidines. It was found that the cyclocondensation strategy is not feasible; thus, the direct chemoselective O-alkylation was performed, and 18 derivatives of the targeted pyrimidines were obtained in 70-98% yields. The structure of the products was unambiguously determined via single crystal X-ray analyses and two-dimensional nuclear magnetic resonance experiments.
Collapse
Affiliation(s)
- Mateus Mittersteiner
- Núcleo
de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa
Maria, RS, Brazil
- Department
of Bioorganic Chemistry, Leibniz-Institute
of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Genilson S. Pereira
- Núcleo
de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa
Maria, RS, Brazil
| | - Ludger A. Wessjohann
- Department
of Bioorganic Chemistry, Leibniz-Institute
of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Helio G. Bonacorso
- Núcleo
de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa
Maria, RS, Brazil
| | - Marcos A. P. Martins
- Núcleo
de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa
Maria, RS, Brazil
| | - Nilo Zanatta
- Núcleo
de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa
Maria, RS, Brazil
| |
Collapse
|
5
|
Mittersteiner M, Pereira GS, Silva Y, Wessjohann LA, Bonacorso HG, Martins MAP, Zanatta N. Substituent-Driven Selective N-/ O-Alkylation of 4-(Trihalomethyl)pyrimidin-2(1 H)-ones Using Brominated Enones. J Org Chem 2022; 87:4590-4602. [DOI: 10.1021/acs.joc.1c02919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Genilson S. Pereira
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Yuri Silva
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Ludger A. Wessjohann
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| |
Collapse
|
6
|
Stefanello FS, Kappenberg YG, Araújo JN, Franceschini SZ, Martins MA, Zanatta N, Iglesias BA, Bonacorso HG. Trifluoromethyl-substituted aryldiazenyl-pyrazolo[1,5-a]pyrimidin-2-amines: Regioselective synthesis, structure, and optical properties. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.109967] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
7
|
Zachow LL, Mittersteiner M, Bonacorso HG, Martins MAP, Zanatta N.
N
‐Functionalization
of 4‐amino‐2‐(trifluoromethyl)‐
1
H
‐pyrroles: Synthesis of
N
‐alkyl derivatives and 1,2,3‐triazol‐4‐yl‐pyrrole scaffolds. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lucimara L. Zachow
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105‐900 Santa Maria RS Brazil
| | - Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105‐900 Santa Maria RS Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105‐900 Santa Maria RS Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105‐900 Santa Maria RS Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105‐900 Santa Maria RS Brazil
| |
Collapse
|
8
|
Expanding 1,2,4-triketone toolbox for use as fluorinated building blocks in the synthesis of pyrazoles, pyridazinones and β-diketohydrazones. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2021.109932] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|