One-Step Synthesis of Lumazine and Xanthine: First Co-Crystal of Lumazine and Perchloric Acid with a Unique Monohydrated Hydronium Ion (H5O2+) Mediated Supramolecular Assembly of the Lumazine Dimer
作者:Shyamaprosad Goswami、Annada C. Maity、Hoong-Kun Fun
DOI:10.1002/ejoc.200700271
日期:2007.8
A perchloric acid mediated one-step synthesis of lumazine derivatives from pterins and xanthine from guanine is reported. However, 2-pivaloylamino derivatives of pterins underwent simple hydrolysis of the pivaloylamino group generating free pterin compounds, but the 2-oxo derivatives, that is, the lumazine compounds, were not obtained. A novel supramolecular assembly is constructed by the unique hydrogen
高氯酸介导的一步合成 lumazine 衍生物从蝶呤和黄嘌呤从鸟嘌呤合成。然而,蝶呤的 2-新戊酰氨基衍生物经过新戊酰氨基的简单水解,产生游离蝶呤化合物,但未获得 2-氧代衍生物,即 lumazine 化合物。通过 H5O2+ 的独特氢键桥接 lumazine 的两个氢键二聚体,与高氯酸水溶液形成共晶 21,构建了一种新型超分子组装体。相比之下,N2-pivaloyl-6-bromo-5-deazapterin 被简单地水解形成质子化的 deazapterin 22,它形成独特的六元环状氢键结构,导致生成聚合物超分子组装。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)