3-Acylindoles via a One-Pot, Regioselective Friedel-Crafts Reaction
作者:Wayne M. Stalick、James H. Wynne、Christopher T. Lloyd、Samuel D. Jensen、Sean Boson
DOI:10.1055/s-2004-831177
日期:——
Within we report a general one-pot high-yielding Friedel-Crafts acylation of indole using acid chlorides and diethyl- aluminum chloride in gram scale quantities. This general synthesis affords products that are easily isolated and require no complex pu- rification procedures.
The conformations of 3-pyridinoyl indoles, which are intermediates 5-fluoropentyl-3-pyridinoyl indole, were investigated using their X-ray crystal structures. All derivatives existed as s-trans conformers. A pseudo-planar conformation was observed in the 2'-yl isomer of 3-pyridinoyl indoles. On the other hand, twisted conformations were observed in 3-pyridinoyl 2-methylindoles. The conformations of