T=142 - 143°C; Dissoziation; Rate constant;

Multi-step reaction with 4 steps 1: boric acid; benzene-1,2-diol / toluene / 18 h / |Inert atmosphere; |Reflux2: lithium hydroxide hydrate / tetrahydrofuran; water / 25 °C3: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dichloromethane / 6 h / 0 °C / |Inert atmosphere4: hydroquinone; phosphorous pentoxide / anhydrous xylene / 56 h / |Inert atmosphere; |Reflux  

With  pyridine; hydrogenchloride; hydroxylamine hydrochloride