N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; 15 h;

1: With cesium fluoride in N,N-dimethyl-formamide T=100°C; P=7500.75 Torr; 3 h; Autoclave; 2: With hydrogenchloride in diethyl ether; water; N,N-dimethyl-formamide T=0°C; pH=2; Inert atmosphere;