potassium tert-butylate; tris-(dibenzylideneacetone)dipalladium(0); 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl in toluene T=90°C; 8 h;

1: With hydrogenchloride; hydrogen; palladium(II) hydroxide/carbon in ethanol; water P=2585.81 Torr; 8 h; 2: With sodium hydrogencarbonate in water pH=8 - 9;