1: With thionyl chloride; N,N-dimethyl-formamide in 1,2-dichloro-ethane T=30 - 38°C; 2: With sodium carbonate in water; 1,2-dichloro-ethane; isobutyl methylketone T=22 - 25°C; pH=8.5 - 9.0; 0.5 h;