sodium hydroxide in water 2 h; Reflux;

1,1'-bis-(diphenylphosphino)ferrocene; copper(I) bromide dimethylsulfide complex; Pd[P(o-tol)3]2; caesium carbonate in tetrahydrofuran; 1-methyl-pyrrolidin-2-one T=50°C; 5 h; Inert atmosphereMolecular sieve;

tetrakis(triphenylphosphine) palladium(0); sodium carbonate in toluene 72 h; Heating;