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DeMing D, LingLing W. Synthesis of 2-alkylisoflavones under phase-transfer Catalysis Conditions. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823407x255533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2-alkyl isoflavones were synthesised with the aliphatic acid chloride and 2-hydroxydeoxybenzoins under phase-transfer catalysis in acetone–K2CO3 medium involves the modified Baker–VenKataraman transformation
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Affiliation(s)
- Dai DeMing
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, ChengDu, Sichuan, 610041 China
| | - Weng LingLing
- Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, ChengDu, Sichuan, 610041 China
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Lévai A, Silva AMS, Cavaleiro JAS, Elguero J, Alkorta I, Jekő J. Synthesis of 4-Aryl-3(5)-(2-hydroxyphenyl)pyrazoles by Reaction of Isoflavones and their 4-Thio Analogues with Hydrazine Derivatives. Aust J Chem 2007. [DOI: 10.1071/ch07268] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
4-Aryl-3(5)-2-(hydroxyphenyl)pyrazoles have been prepared by the reaction of isoflavones and their 4-thio analogues with hydrazine hydrate and phenylhydrazine in hot pyridine. The reaction mechanism for the formation of these pyrazoles is discussed. All the new compounds have been fully characterized by NMR spectroscopy. In [D6]DMSO, a 1H NMR study allows observation of the presence of both pyrazole annular tautomers, due to the presence of intramolecular hydrogen bonds in each tautomer (OH···N and NH···O). Theoretical calculations have been carried out on tautomers and conformers of compounds 20 (3(5)-(2-hydroxy-4-methoxyphenyl)-5(3)-methyl-4-phenylpyrazole) and 21 (3(5)-(2-hydroxy-4-methoxyphenyl)-4-(2-methoxyphenyl)-5(3)-methylpyrazole), including the absolute shieldings (GIAO/B3 LYP/6–311++G**) of 21.
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Lévai A, Patonay T, Székely A, Vass EB, Adam W, Jekö J. A comparative study of the epoxidation of 2-substituted isoflavones by dimethyldioxirane, sodium hypochlorite, and alkaline hydrogen peroxide (weitz-scheffer reaction). J Heterocycl Chem 2000. [DOI: 10.1002/jhet.5570370507] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kawase Y, Numata C. Synthetic Studies on the Benzofuran Derivatives. VIII. Synthesis of Furo [2,3-f] chromeno[3,4-b] chromone. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1962. [DOI: 10.1246/bcsj.35.1366] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kawase Y, Ogawa K, Miyoshi S, Fukui K. Synthetic Studies on the Benzofuran Derivatives. VI. Synthesis of Furano(2″,3″:7,8)-2′-methoxy-isoflavone Derivatives. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1960. [DOI: 10.1246/bcsj.33.1240] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Dann O, Lang J, Vohl H. Mit der Willgerodt-Reaktion dargestellte 2-Methoxy-phenylessigsäuren und deren Umwandlung in 2'-Methoxy-desoxybenzoine und in 2-Phenyl-cumarone. ACTA ACUST UNITED AC 1960. [DOI: 10.1002/jlac.19606310114] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Sarin PS, Sehgal JM, Seshadri TR. Synthetic experiments in the benzopyrone series. ACTA ACUST UNITED AC 1958. [DOI: 10.1007/bf03052812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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