1: With boron trifluoride diethyl etherate in dichloromethane T=-78 - 20°C; Schmidt reaction; Inert atmosphere; 2: With sodium tetrahydroborate; sodium hydroxide in dichloromethane; water T=0 - 20°C; Schmidt reaction; Inert atmosphere;

hydrogen; Raney-Ni-Cr; chromium

diphenyl phosphoryl azide; 1,8-diazabicyclo[5.4.0]undec-7-ene in toluene Inert atmosphere;

sodium azide in N,N-dimethyl-formamide T=20°C; 3 h; Inert atmosphere;