Modified Vilsmeier reactions of activated benzofurans with indolines: Synthesis of benzofuran-fused benzocarbazoles
作者:David St.C. Black、Robert Rezaie
DOI:10.1016/s0040-4039(99)00699-1
日期:1999.5
Regioselective reactions of 3-substituted 4,6-dimethoxybenzofurans with indolin-2-ones and triflic anhydride afforded 7- and/or 2-substituted indolo-benzofurans and the latter were cyclised to previously unknown benzofuran-fused benzocarbazoles using palladium (II) acetate in heated acetic acid.