作者:Qingyu Zhang、Yung‐Yin Chan、Muyin Zhang、Ying‐Yeung Yeung、Zhihai Ke
DOI:10.1002/anie.202208009
日期:2022.8.26
strategy for hypervalentchalcogenonium⋅⋅⋅πbondingcatalysis using trisubstituted selenonium salts as electrophilic chalcogen bond donors and alkenes as chalcogen bond acceptors is reported. 1,2-Oxaselenoliums can activate π-systems in three classes of metal-free cyclization and addition via unconventional seleniranium intermediates. The counter anion has a significant effect on catalysis.
A series of 4-benzylphenols, 2-methyl-4-benzylphenols, 4-methyl-2-benzylphenols and 4-methoxy-2-benzylphenols have been prepared and evaluated as antioxidants for tetralin at 60 °C by means of an oxygen-absorption method. Very good activities have been observed with a series of 4-methoxy-2-benzylphenols. The electrochemical oxidation potentials of these compounds were determined using linear-sweep