A modular concept for the generation of achiral and chiral non-racemic tetrahedral tectons from common precursors was developed. The tectons presented here are based on tetraphenylmethane or 1,3,5,7-tetraphenyladamantane core structures. They are obtained through high-yielding four-fold click reactions, using either the tetraazido or the tetraalkyne precursors. In most cases, the tetratriazoles are obtained as pure products after simple washing with water and methanol. The side chains of the tectons prepared include a self-complementary DNA dimer, obtained from a 3′-azidonucleoside and a phosphoramidite. The concept allows for a variation of the “sticky ends”, leading to tecton or ligand libraries.
开发了一种模块化概念,用于从常见前体生成非手性和非外消旋的四面体手性构造单元。本文介绍的构造单元基于四苯
甲烷或
1,3,5,7-四苯基金刚烷核心结构。它们通过高产率的四重点击反应获得,使用四
叠氮或四炔前体。在大多数情况下,经过简单的用
水和
甲醇洗涤后,四三唑作为纯产物获得。制备的构造单元的侧链包括一个自互补DNA二聚体,由3'-
叠氮核苷酸和
磷酰胺获得。该概念允许对“粘性末端”进行变化,从而产生构造单元或
配体库。