64398-14-7Relevant articles and documents
A Novel Synthesis of Theophylline Derivatives
Yoneda, Fumio,Koga, Ryosuke
, p. 813 - 816 (2007/10/02)
Treatment of 6-amino-5-arylazo-1,3-dimethyluracils with ethyl propiolate gave the corresponding Michael-type adducts, 5-arylazo-1,3-dimethyl-6-ethoxycarbonylvinylaminouracils, which on treatment with a mixture of hydrochloric acid and acetic acid caused the acid-catalyzed rearrangement accompanied with rearrangement to give rise to the corresponding 8-anilinomethyltheophylline derivatives.In the case that the arylazo group possesses an electron-releasing substituent such as methoxy, the reaction proceeded ina different way to afford 1,2-bis(theophyllin-8-yl)ethane.The presumable reaction mechanisms for the above purine syntheses were proposed.