Reactions of electron-rich indoles with triflic anhydride
作者:Nageshwar R. Yepuri、Rachada Haritakul、Paul A. Keller、Brian W. Skelton、Allan H. White
DOI:10.1016/j.tetlet.2009.03.052
日期:2009.5
The reaction of electron-rich 3-aryl-substituted 4,6-dimethoxyindoles in the presence of base with triflicanhydride results in biaryl coupling, producing both 2,2′- and 2,7′-biindoles. Further, if acetone is present, the corresponding vinyl triflate is formed and subsequent reaction yields the known indolylpyrroloindoles and dimeric spiroindoles. This is the first reported synthesis of these compounds