of tricarbonyl-η6-(1-tri-isopropyisilylindote)chromium(0) and η6-(1 -tri-isopropylsilyl-3-methoxymethylindole)tricarbonylchromium(0) followed by an electrophilic quench produced a series of 4-substituted indolecomplexes. For the 4-acyl, -allyl and -alkenyl analogues, transmetallation of the lithio- species to the corresponding cupro- complexes and reaction with the appropriate halides (in the alkenyl
A new synthesis of 4-substitued indoles via tricarbonylarenechromium(0) complexes
作者:Gordon Nechvatal、David A. Widdowson
DOI:10.1039/c39820000467
日期:——
Tricarbonyl-(η6-1-tri-isopropylsilylindole)chromium (0), lithiated selectively at C-4 by n-butyl-lithium–N,N,N′,N′-tetramethylethylenediamine (TMEDA), can be substituted in good yield by a range of electrophiles; the method has been used to synthesise 4-prenylindole.