The photochemically initiated dehydro-Diels-Alder (PDDA) reaction is an efficient and versatile method for the prepa- ration of biaryls. The ring closure may take place both inter- and in- tramolecularly, of which the intramolecular variant is more productive from the preparative point of view. A variety of linkers can be employed to connect the ynone moiety, which acts as the chromophore, with another
Silver-catalyzed intramolecular hydroamination of alkynes in aqueous media: efficient and regioselective synthesis for fused benzimidazoles
作者:Xu Zhang、Yu Zhou、Hengshuai Wang、Diliang Guo、Deju Ye、Yungen Xu、Hualiang Jiang、Hong Liu
DOI:10.1039/c0gc00668h
日期:——
A simple, convenient and green synthetic approach to diverse fused tricyclic benzimidazoles has been developed by Ag(I) complex catalyzed intramolecular hydroamination under the classic method or by microwave irradiation in water. This strategy presents an operationally simple and environmentally friendly transformation, in which various substituted benzimidazoles facilitated efficient cyclization