8-Carboxyethyl-7-deazaguanine (1) had failed to form through the typical cyclization conditions and previously required a considerably more longwinded synthetic approach to form over the furo-isomer (2). We report herein a more direct, simplified approach to 1 by iterative modification of the cyclization reaction conditions, which resulted in a complete reversal of regiochemistry in favor of the desired
由于脱氮
鸟嘌呤具有广泛的应用范围,从医学研究到超分子组装,因此重要的是通往该杂环的功能化形式的简单途径。已知仅在某些情况下,导致脱氮
鸟嘌呤的环化反应还导致
呋喃-异构体。在典型的环化条件下,无法形成8-羧乙基-7-脱氮
鸟嘌呤(1),并且以前需要在
糠醛-异构体(2)上形成更长效的合成方法。我们在此报告了一种更直接,更简化的方法,该方法通过迭代修饰环化反应条件来实现,从而导致区域
化学反应完全逆转,有利于所需的脱氮
鸟嘌呤。