- Absorption and luminescence spectra of 5-aryl-3-methyl-1,2,4-oxadiazoles and their chelate complexes with Zinc(II) and copper(II)
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5-(2-Hydroxyphenyl)-3-methyl-1,2,4-oxadiazole and its O-methyl and O-acyl derivatives, as well as zinc(II) and copper(II) chelates, were synthesized. All these compounds showed luminescence with the emission maxima ranging from λ = 332 to 490 nm, but only 5-(2-methoxyphenyl)- and 5-(2-acetoxyphenyl)-3-methyl-1,2,4-oxadiazoles and zinc(II) complex of 5-(2-hydroxyphenyl)-3-methyl-1,2,4-oxadiazole were characterized by high luminescence quantum yield (φ = 0.308–0.452, 0.089–0.153, and 0.115–0.334, respectively). Stable conformers of 5-(2-hydroxyphenyl)-3-methyl-1,2,4-oxadiazole with different structures of the coordination entity were identified by DFT quantum chemical calculations.
- Mikhailov,Vikrishchuk,Popov,Dushenko,Beldovskaya,Revinskii, Yu. V.,Minkin
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- Properties of 2-(Bromomethyl)-4-oxo-1,3-benzoxazinium Perchlorate and its Derivatives
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The reaction of 2-(bromomethyl)-4-oxo-1,3-benzoxazinium perchlorate with mono and binucleophiles was investigated. Hydrolysis of the salt furnished N-(bromoacetyl)salicylamide. Nucleophilic substitution of bromine in the latter yielded 2-(iodoacetyl)-4-ox
- Vikrishchuk,Suzdalev,Ryabukhin,Zhdanov
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p. 564 - 569
(2007/10/03)
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- SYNTHESIS AND STUDY OF THE STRUCTURE OF o-HYDROXYARYL-1,2,4-OXADIAZOLES
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The reaction of 4-oxo-1,3-benz- and naphthoxazinium perchlorates with hydroxylamine leads to 5-(-o-hydroxyaryl)-1,2,4-oxadiazoles rather than to 3-(o-hydroxyaryl)-1,2,4-oxadiazoles, as was previously assumed.The structure of the compounds obtained was pro
- Ryabukhin, Yu. I.,Eliseeva, A. Yu.,Suzdalev, K. F.,Bulgarevich, S. B.,Movshovich, D. Ya.,et al.
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p. 454 - 463
(2007/10/02)
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