Chemistry of Heterocyclic Compounds p. 1123 - 1129 (1987)
Update date:2022-08-04
Topics:
Nanavyan, I. M.
Kuz'menko, V. V.
Pozharskii, A. F.
Klyuev, N. A.
By treating 8-aminotheophylline with hydroxylamine-O-sulfonic acid in aqueous alkali we have obtained 7,8-diaminotheophylline and studied its reactions with benzaldehyde, 1,2-dicarbonyl compounds, and acylating agents.We have established that in reactions with electrophiles, the N-amino group in 7,8-diaminotheophylline is more active than the amino group situated at the 8-position.An unexpected self-condensation of two molecules of 7,8-diaminotheophylline has been found in acid medium, leading to purino<8,7g>-7-azapteridine derivatives.
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(1987)
