Herein, we present three new 2,2'-bipyridines that carry two beta-cyclodextrin moieties in different substitution patterns. When coordinated by zinc(II) or copper(I) ions (or their complexes), these compounds undergo conformational changes and switch between "open" and "closed" forms and thereby bringing together or separating the cyclodextrin moieties from each other.
在此,我们提出了三种新的 2,2'-联吡啶,它们以不同的取代模式携带两个 β-环糊精部分。当与锌 (II) 或铜 (I) 离子(或它们的配合物)配位时,这些化合物会发生构象变化并在“开放”和“封闭”形式之间切换,从而将环糊精部分彼此结合或分离。
Synthesis of Amino-Functionalized 2,2′-Bipyridines
Amino-functionalized 2,2′-bipyridines are versatile building blocks for the synthesis of sophisticated chelating ligands with the 2,2′-bipyridine core. The 4-, 5-, and 6-substituted 2-chloro- and 2-bromopyridine building blocks were prepared and coupled to symmetrically and non-symmetrically diamino-functionalized compounds by homo- and cross-coupling procedures. Further transformations were carried out to demonstrate the synthetic versatility of these compounds and the employed procedures.