114811-62-0Relevant articles and documents
PURINES, PYRIMIDINES, AND CONDENSED SYSTEMS BASED ON THEM. 3.7,8-DIAMINOTHEOPHYLLINE
Nanavyan, I. M.,Kuz'menko, V. V.,Pozharskii, A. F.,Klyuev, N. A.
, p. 1123 - 1129 (2007/10/02)
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-7-azapteridine derivatives.