4-(N,N-dimethlyamino)pyridine in 1,2-dichloro-benzene T=140°C; 2 h;

tris(dibenzylideneacetone)dipalladium(0) chloroform complex; lithium hexamethyldisilazane; 2-dicyclohexylphosphino-1,1'-biphenyl in tetrahydrofuran T=80°C; 12 h;