Polyheterocyclic pyrimidinyltheophyllines have been synthesized from pyrimidine and theophylline precursors. Attempts to cyclize these reactive bis-heterocyclic systems resulted in the formation of the corresponding diazepine moieties. In addition, modification of the reaction conditions led to the formation of imidazo[2,1-f]purines.
多杂环
嘧啶基茶碱已由
嘧啶和茶碱前体合成。对这些反应性双杂环系统的环化尝试导致了相应的二氮杂环部分的形成。此外,反应条件的改变导致
咪唑并[2,1-f]
嘌呤的形成。