Cage-shaped borate esters with enhanced Lewis acidity and catalytic activity.
Cage-shaped borate esters with enhanced Lewis acidity and catalytic activity.
复制标题
DOI：
10.1021/ol053026
复制
发表时间：
2006-01
期刊：
影响因子：
5.2
通讯作者：
M. Yasuda;S. Yoshioka;S. Yamasaki;Toshio Somyo;K. Chiba;A. Baba
中科院分区：
文献类型：
--
作者：
M. Yasuda;S. Yoshioka;S. Yamasaki;Toshio Somyo;K. Chiba;A. Baba
[structure: see text] A cage shape causes high Lewis acidity and catalytic activity on boron. Borate esters that have cage-shaped ligands have accessible LUMO with lower eigenvalues than normal open-shaped borate esters. A large dihedral angle at C-O-B-O in cage-shaped borate esters induces less overlap between p-orbitals on O and B. The hetero-Diels-Alder reaction is effectively catalyzed by the cage-shaped borate, although the open-shaped borate does not act as a catalyst.
