sodium sulfate in 1,2-dichloro-ethane T=20°C;

1: 1-(3,4-Dimethoxy-phenyl)-1-methyl-iminomethyl-cyclopropan With chloro-trimethyl-silane; sodium iodide in DMF (N,N-dimethyl-formamide) T=90°C; 3 h; 2: With hydrogenchloride in diethyl ether; dichloromethane 3: methyl vinyl ketone With sodium hydroxide more than 3 stages;