Cationic Palladium-Catalyzed [5+2] Annulation: Synthesis of 1-Benzoxepines from 2-Aroylmethoxyarylboronic Acids
作者:Guixia Liu、Xiyan Lu
DOI:10.1002/adsc.200700369
日期:2007.10.8
The synthesis of 1-benzoxepinesfrom2-aroylmethoxyarylboronicacids and alkynes in the presence of a catalytic amount of [Pd(dppp)(H2O)2]2+(TfO−)2 was developed. This [5+2] annulation involves the intramolecular nucleophilic addition of a vinylpalladium species to ketones.
Cationic Palladium-Catalyzed [5 + 2] Annulation of 2-Acylmethoxyarylboronic Acids and Allenoates: Synthesis of 1-Benzoxepine Derivatives
作者:Xufen Yu、Xiyan Lu
DOI:10.1021/jo200672w
日期:2011.8.5
The 1-benzoxepine derivatives were synthesized conveniently by cationicpalladium-catalyzed [5 + 2] annulation reaction of 2-acylmethoxyarylboronic acids with allenoates in high yields. This annulation involves the intramolecular nucleophilic addition to ketones without the formation of π-allylpalladium species.