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
Oxidative coupling of indoles using thallium(III) trifluoroacetate
作者:Paul A. Keller、Nageshwar R. Yepuri、Michael J. Kelso、Michael Mariani、Brian W. Skelton、Allan H. White
DOI:10.1016/j.tet.2008.05.133
日期:2008.8
The oxidativecoupling of polysubstituted electron-rich indoles mediated by thalliumtrifluoroacetate was found to be a facile, clean, and high yielding reaction. Indolic coupling sites were determined by the nature of the substituents present, with dimerisation at the indole 2-position being the dominant outcome. Indoles bearing two potential reaction sites with similar reactivity were additionally