Preorganized Aryltriazole Foldamers as Effective Transmembrane Transporters for Chloride Anion
摘要:
Preorganized aryltriazole foldamers 1 and 2 were designed and synthesized. NMR studies and X-ray analysis demonstrate that 1 adopts a crescent conformation driven by a series of continuous hydrogen bonds at the periphery of the foldamer, whereas 2 displays a coil conformation. NMR titrations reveal that the affinities of fully preorganized foldamer 1 for halogen anions are much stronger that those of partially preorganized foldamer 2. Furthermore, it is found that such full preorganization makes 1 an effective transmembrane transporter for the chloride anion across a lipid bilayer.
Asymmetric synthesis of chiral P-stereogenic triaryl phosphine oxides via Pd-catalyzed kinetic arylation of diaryl phosphine oxides
作者:Yong Zhang、Huan He、Qiuyan Wang、Qian Cai
DOI:10.1016/j.tetlet.2016.10.048
日期:2016.11
Enantioselective C–Pcross-coupling of diarylphosphine oxides with ortho-substituted aryl iodides has been achieved via kinetic resolution strategy, affording chiral triarylphosphine oxides in high yields and with moderate to high enantioselectivity.