1.1: oxalyl dichloride / dimethyl sulfoxide; dichloromethane / 0.25 h / -60 °C 1.2: 0.08 h 2.1: triethylamine; tris-(dibenzylideneacetone)dipalladium(0); caesium carbonate; 1,1'-bis-(di-tert-butylphosphino)ferrocene / toluene / 24 h / 110 °C / |Sealed tube View Scheme

1.1: oxalyl dichloride / dimethyl sulfoxide; dichloromethane / 0.25 h / -60 °C 1.2: 0.08 h 2.1: triethylamine; tris-(dibenzylideneacetone)dipalladium(0); caesium carbonate; tris-(o-tolyl)phosphine / toluene / 8 h / 110 °C / |Sealed tube View Scheme

1.1: oxalyl dichloride / dimethyl sulfoxide; dichloromethane / 0.25 h / -60 °C 1.2: 0.08 h 2.1: triethylamine; caesium carbonate; tetrakis(triphenylphosphine) palladium(0) / toluene / 110 °C / |Sealed tube View Scheme