Synthesis of Indoles via Palladium[0]-Mediated Ullmann Cross-Coupling of <i>o-</i>Halonitroarenes with α-Halo-enones or -enals
作者:Martin G. Banwell、Brian D. Kelly、Okanya J. Kokas、David W. Lupton
DOI:10.1021/ol034745w
日期:2003.7.1
[reaction: see text] Palladium[0]-mediated Ullmann cross-coupling of o-halonitrobenzene (1) and various related nitroarenes with a range of alpha-halo-enones (e.g., 2) or -enals readily affords the expected alpha-arylenones, e.g., 3, or -enals, which are converted into the corresponding indoles, e.g., 4, on reaction with dihydrogen in the presence of Pd on C.