The rapid and efficient synthesis of 1-alkylquinuclidinium (1-alkyl-1-azabicyclo[2.2.2]octane) and 1-alkyl-4-aza-1-azoniabicyclo[2.2.2]octane iodides are described. The products were characterized by 1H NMR spectra and elemental analysis.
Confused‐Prism[5]arene: a Conformationally Adaptive Host by Stereoselective Opening of the 1,4‐Bridged Naphthalene Flap
作者:Paolo Della Sala、Rocco del Regno、Amedeo Capobianco、Veronica Iuliano、Carmen Talotta、Silvano Geremia、Neal Hickey、Placido Neri、Carmine Gaeta
DOI:10.1002/chem.202203030
日期:2023.1.27
The confused-prism[5]arenehost changes its planar chirality upon the complexation of ammonium guests, adopting the homochiral all-pR (or all-pS) conformation. Stereoselective directional threading was also observed in the presence of directional ammonium axles, resulting in the formation of pseudorotaxanes in which the prismarene wheel adopts homochiral all-pR (all-pS) conformation.
所有的变化,都在一起:混淆棱柱 [5] 芳烃主体在铵客体络合时改变其平面手性,采用纯手性 all-p R(或 all-p S)构象。在存在定向铵轴的情况下也观察到立体选择性定向穿线,导致假轮烷的形成,其中海藻烯轮采用纯手性全 p R (全 p S ) 构象。