1: With water; caesium carbonate; sodium thiosulfate; bis(dibenzylideneacetone)-palladium(0); 2-(dicyclohexylphosphino)-2',4',6'-tri-i-propyl-1,1’-biphenyl in toluene; tert-butyl alcohol T=80°C; 24 h; Inert atmosphere; 2: With hydrogenchloride; zinc in water 1 h; Cooling with ice;