1.1: 4-(N,N-dimethlyamino)pyridine; N-ethyl-N,N-diisopropylamine / pyridine / 1 h / 0 - 20 °C 2.1: triethylammonium formate; 1,1'-bis(diphenylphosphino)ferrocene / palladium diacetate / N,N-dimethyl-formamide / 8 h / 50 °C / Inert atmosphere 3.1: sodium hydroxide / water / 0.5 h / 30 °C 3.2: pH 7 View Scheme

1: With sodium hydroxide; water T=30°C; 0.5 h; 2: With hydrogenchloride in water pH=7;