Abstract
It was established that the protonation and alkylation of mesoionic thiazolo[3,2-a]quinoxalinium 1-oxides does not take places at the oxide oxygen atom but rather at the nitrogen atom in the 5-position. The π-electron structures of the compounds obtained were studied by the Pariser-Parr-Pople (PPP) method.
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See [1] for Communication 19.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 842–845, June, 1990.
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Fedotov, K.V., Romanov, N.N. Mesoionic compounds with a bridge nitrogen atom. 20. Thiazoloquinoxalinium oxide salts. Chem Heterocycl Compd 26, 702–705 (1990). https://doi.org/10.1007/BF00756430
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DOI: https://doi.org/10.1007/BF00756430