Structural diversity in substituted-pyridinium iodo- and bromoplumbates: a matter of halide and temperature
作者:Verónica Gómez、Olaf Fuhr、Mario Ruben
DOI:10.1039/c6ce01684g
日期:——
monosubstituted pyridiniumcations have been used for the synthesis of 22 new hybrid iodo- and bromoplumbates. Different frameworks can be obtained depending not only on the position (ortho-, meta- or para-), or nature (Br, Cl or Me) of the substituent but also on the temperature of the reaction. Out of the 22 new compounds synthesized, 16 are 1D systems with formula APbX3 (A = monosubstituted pyridinium cation
Direct<i>ortho</i>-Arylation of<i>N</i>-Phenacylpyridinium Bromide by Palladium-Catalyzed CH-Bond Activation
作者:Jimin Xu、Guolin Cheng、Deyong Su、Yantao Liu、Xinyan Wang、Yuefei Hu
DOI:10.1002/chem.200901399
日期:2009.12.7
A novel palladium catalyzed direct ortho‐arylation of N‐phenacylpyridinium bromide was developed. The amazing N‐phenacyl group regioselectivelyactivates the CH bond of pyridine and automatically departs from the arylated products. A kinetic isotope effect study proved that the reaction went through a CH‐bond activation pathway and 2,6‐diphenylpyridine was produced stepwise from 2‐phenylpyridine