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Preparation of 1,2- and 1,4-dihydro derivatives of 6,7-dimethyl-2,3-diphenylquinoxalineviaits dianion formed by reductive metallation

โœ Scribed by Seniz Kaban; Feray Aydogan


Publisher
Springer Vienna
Year
2008
Tongue
English
Weight
144 KB
Volume
139
Category
Article
ISSN
0026-9247

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## Abstract The reductive metallation of 6โ€methylโ€2,3โ€diphenylquinoxaline 1 with sodium metal in tetrahydrofuran and inert atmosphere to a monomeric dianion 2 has been explored and the nucleophilicity of this disodium adduct was investigated with various alkylation and acylation reagents. An annula

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## Abstract Treatment of 2,3,5,6โ€tetraphenylpyrazine (1) with sodium in tetrahydrofuran effected the formation of monomeric dianion 2. The chemical behaviour of this new disodium adduct was characterized by a variety of reagents. Generally, the protonation (water), alkylation (methyl iodide and ben