T=0°C; 5 h;

in tetrahydrofuran T=50°C; 6.5 h; Reflux; TemperatureTime;

T=0°C; 5 h; Cooling with ice; TemperatureTime;

in tetrahydrofuran dropwise addn. of amine in THF to (CH2)4O*BH3 (freshyly prepared from (C2H5)2O*BF3 and NaBH4 in THF) in THF (2-3h) at room temp., filtartion, evapn. of solvent;; addn. of powdered product into H2O, filtration, washing with cold (5°C) H2O until neutral react., dyring; (further purification by dissolving in THF at 40°C, filtration, pptn. with C6H6);;

sodium tetrahydroborate in tetrahydrofuran 20 h; Inert atmosphere;

in tetrahydrofuran byproducts: NaCl, H2; addn. of NaBH4 to ammonium-salt in dry THF under N2, 15h; filtration, removal of solvent;;

in tetrahydrofuran

in hydrogenchloride byproducts: H2; fast hydrolysis;;

byproducts: H2; excess of HCl, room temp.;;

excess of (CH3)3N;;