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Mierina I, Jure M, Zeberga S, Makareviciene V, Zicane D, Tetere Z, Ravina I. Novel type of carbon‐centered antioxidants arylmethyl Meldrum's acids − inhibit free radicals. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201700172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Inese Mierina
- Institute of Technology of Organic ChemistryFaculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia
| | - Mara Jure
- Institute of Technology of Organic ChemistryFaculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia
| | - Sindija Zeberga
- Institute of Technology of Organic ChemistryFaculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia
- Latvian Institute of Organic SynthesisRigaLatvia
| | - Violeta Makareviciene
- Faculty of Forest Sciences and EcologyAleksandras Stulginskis UniversityAkademijaKaunas Distr.Lithuania
| | - Daina Zicane
- Institute of Technology of Organic ChemistryFaculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia
| | - Zenta Tetere
- Institute of Technology of Organic ChemistryFaculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia
| | - Irisa Ravina
- Institute of Technology of Organic ChemistryFaculty of Materials Science and Applied ChemistryRiga Technical UniversityRigaLatvia
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Khlebnicova TS, Piven YA, Baranovsky AV, Lakhvich FA, Shishkina SV, Zicāne D, Tetere Z, Rāviņa I, Kumpiņš V, Rijkure I, Mieriņa I, Peipiņš U, Turks M. Synthesis of novel lupane triterpenoid-indazolone hybrids with oxime ester linkage. Steroids 2017; 117:77-89. [PMID: 27500691 DOI: 10.1016/j.steroids.2016.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/29/2016] [Accepted: 08/02/2016] [Indexed: 01/11/2023]
Abstract
An efficient protocol for the synthesis of novel lupane triterpenoid-indazolone hybrids with oxime ester linkage has been developed from naturally accessible precursor betulin. For the first time a series of betulonic acid-indazolone hybrids have been synthesized via an acylation of corresponding 6,7-dihydro-1H-indazol-4(5H)-one oximes with betulonic acid chloride. Diastereoselective reduction of the obtained betulonic acid conjugates with NaBH4 resulted in a formation of betulinic acid-indazolone hybrids in excellent yields. The configuration of the key compounds has been fully established by X-ray and 2D NMR analysis.
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Affiliation(s)
- Tatyana S Khlebnicova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Yuri A Piven
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Alexander V Baranovsky
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Fedor A Lakhvich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Acad. Kuprevicha Str. 5/2, 220141 Minsk, Belarus
| | - Svetlana V Shishkina
- Institute for Single Crystals, National Academy of Sciences of Ukraine, pr. Lenina 60, Kharkiv 61001, Ukraine
| | - Daina Zicāne
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Zenta Tetere
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Irisa Rāviņa
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Viktors Kumpiņš
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Inese Rijkure
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Inese Mieriņa
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Uldis Peipiņš
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3, Riga LV-1048, Latvia.
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Tetere Z, Zicāne D, Rāviņa I, Mieriņa I, Rijkure I. Synthesis and Antioxidant Properties of Novel Quinazoline Derivatives. ACTA ACUST UNITED AC 2014. [DOI: 10.7250/msac.2014.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zicane D, Ravina I, Tetere Z, Rijkure I. Synthesis of 3-{3-[(4-methylcyclohex-3-enyl-carbonyl)amino]-4-oxo-3,4-dihydroquinazolin-2-yl}propanoic acid anilides. Chem Heterocycl Compd (N Y) 2012. [DOI: 10.1007/s10593-012-0997-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tetere Z, Kumpiņš V, Belyakov S, Zicāne D, Turks M. Synthesis and X-ray analysis of 7-bromoarbidol, an impurity standard of arbidol. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.625] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zicāne D, Raviņa I, Tetere Z, Petrova M. Synthesis of N′-cyclohexenecarbonyl-substituted hydrazides of 2-aminobenzoic acids and preparation of 3-cyclohexenyl-amido-1,2-dihydroquinazolin-4-ones based on them. Chem Heterocycl Compd (N Y) 2007. [DOI: 10.1007/s10593-007-0122-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zicane D, Ravina I, Tetere Z, Petrova M. Synthesis of Derivatives of Pyrazolin-1H-3-ones from 2′-N-Substituted Monohydrazides of Cyclohexenedicarboxylic Acids. Chem Heterocycl Compd (N Y) 2005. [DOI: 10.1007/s10593-005-0237-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zicane D, Tetere Z, Ravina I, Petrova M. Synthesis of Derivatives of 1,3,4-Oxadiazoles Based on Monohydrazides of 2-Aryl-4-methyl-4-cyclohexen-1,2-dicarboxylic Acids. Chem Heterocycl Compd (N Y) 2004. [DOI: 10.1023/b:cohc.0000044575.37674.6e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tetere Z, Zicane D, Ravina I, Petrova M, Gudriniece E. Interaction of Hydrazides of 2-Aryl-4-methyl-4-cyclohexene-1,1-dicarboxylic Acids with Certain Heterocyclic Aldehydes. Chem Heterocycl Compd (N Y) 2003. [DOI: 10.1023/b:cohc.0000008262.83883.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Zicane D, Ravinya I, Tetere Z, Rijkure I, Gudriniece E, Kalejs U. Exotic amino acids. 4. Synthesis of methyl esters of some N-heteroamino-methylenemalonic acids. Chem Heterocycl Compd (N Y) 2000. [DOI: 10.1007/bf02297688] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zicane D, Petrova M, Tetere Z, Kreishman G, Brooks E, Karlson J, Kalejs U. Side reactions in the pyroglutamic acid-7-amino-4-methylcoumarin synthesis. Int J Pept Protein Res 1996; 48:56-8. [PMID: 8844263 DOI: 10.1111/j.1399-3011.1996.tb01106.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
N-Formylpyroglutamic acid-7-amido-4-methylcoumarine and pyroglutamyl-pyroglutamic acid-7-amido-4-methylcoumarin are the major products in the synthesis of pyroglutamic acid-7-amido-4-methylcoumarin by phosphorus pentachloride in dimethylformamide and dicyclohexylcarbodiimide under pyridine activation.
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Affiliation(s)
- D Zicane
- Department of Chemistry, Technical University, Riga, Latvia
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