- Regioselective C-3 arylation of coumarins with arylhydrazines via radical oxidation by potassium permanganate
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An efficient protocol for oxidative C-3 arylation of coumarins with arylhydrazine has been developed using potassium permanganate as an oxidant. The arylated coumarins with different electronic properties were obtained in moderate to good yields. The deve
- Yuan, Jin-Wei,Li, Wei-Jie,Yang, Liang-Ru,Mao, Pu,Xiao, Yong-Mei
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p. 1115 - 1123
(2016/11/16)
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- PHOTOCHEMICAL REACTIONS OF 7-AMINOCOUMARINS. 8. REACTION OF 3-IODO-4-METHYL-7-DIETHYLAMINOCOUMARIN WITH MONOSUBSTITUTED BENZENES
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A number of 3-aryl-4-methyl-7-diethylaminocoumarins were obtained as a result of the photolysis of 3-iodo-4-methyl-7-diethylaminocoumarin in the presence of benzene, chlorobenzene, fluorobenzene, benzonitrile, toluene, and diphenyl ether.On the basis of an analysis of the PMR spectra it was established that photosubstitution leads to o- and p-isomeric products.The mechanism of the reaction was studied.
- Gordeeva, N. A.,Kirpichenok, M. A.,Gernyshev, A. I.,Grandberg, I.I.,Akimova, N. P.
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p. 976 - 980
(2007/10/02)
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- PHOTOCHEMICAL REACTIONS OF 7-AMINOCOUMARINS. 6. REACTION OF 7-DIALKYLAMINOCOUMARINS WITH HALO DERIVATIVES
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3-Substituted 7-dialkylaminocoumarins were synthesized as a result of the photoreaction of 7-diethylaminocoumarin, 4-trifluoromethyl-7-diethylaminocoumarin, 4-chloro-7-diethylaminocoumarin, 4-(N-morpholino)-7-diethylaminocoumarin, and coumarin-102 (2,3,6,
- Kirpichenok, M. A.,Mel'nikova, L. M.,Denisov, L. K.,Grandberg, I. I.
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p. 858 - 862
(2007/10/02)
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- PHOTOCHEMICAL REACTIONS OF 7-AMINOCOUMARINS. 4. REACTION OF 4-METHYL-7-DIETHYLAMINOCOUMARIN WITH COMPOUNDS TENDING TO PHOTOLYTIC DISSOCIATION
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The photochemical reactions of 4-methyl-7-diethylaminocoumarin with a series of alkyl halides including isopropyl iodide, allyl iodide, bromoacetone, α-bromoethyl acetate, phenacyl bromide, p-bromophenacyl bromide, and chloroacetonitrile, and aryl iodides including iodobenzene, 2-nitroiodobenzene, 3,4-dimethoxyiodobenzene, and 3-iodo-4-methyl-7-diethylaminocoumarin proceed by a radical addition mechanism to give 3-substituted aminocoumarins.A series of 3-substituted 7-aminocoumarins was also obtained as a result of the photochemical reactions of 4-methyl-7-diethylaminocoumarin, with other reagents, having photolabile chemical bonds such as dioxanyl peroxide, phenyl iodosodiacetate, and nitromethane.The luminescence characteristics of the compounds synthesized were studied.
- Kirpichenok, M. A.,Mel'nikova, L. M.,Denisov, L. K.,Grandberg, I. I.
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p. 380 - 388
(2007/10/02)
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