in deuterated toluene Pd complex reacted with 4,6-dichloro-2-pyrone in toluene-d8 at 25°C; not isolated; monitored by (31)P NMR spectra;

acetic acid; zinc T=20°C; 42 h;

copper(l) iodide; triphenylphosphine; bis(dibenzylideneacetone)-palladium(0) in toluene T=25°C; Sonogashira cross-coupling; 21 h; Product distribution; Further Variations:TemperaturesCatalystsReagents;

copper(l) iodide; triethylamine; bis-triphenylphosphine-palladium(II) chloride in toluene T=25°C; Sonogashira cross-coupling; 21 h;