sodium azide; copper; 2-piperidinecarboxylic acid; ascorbic acid powder in ethanol T=100°C; Inert atmosphereSealed tube;

1: With hydrogenchloride; water; iron in ethanol T=60°C; 2 h; 2: With water; potassium carbonate in ethanol pH=8;

1: With caesium carbonate; palladium diacetate; 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl in 1,4-dioxane T=95°C; 16 h; 2: With hydrogenchloride; methanol T=20°C; 1 h; 3: With sodium hydrogencarbonate in methanol; dichloromethane; water