1: With ammonia in dichloromethane; water T=5 - 10°C; pH=8.9 - 9.1; 2: With hydrogen bromide in ethanol; dichloromethane; water T=30 - 35°C; 3: With hydrogen bromide in ethanol; water T=0 - 5°C; pH=2.5 - 3.0; 3 h; Product distribution / selectivity;