1: 1-hexyl-2-(trimethylsilyl)acetylene; tert-butylmagnesium bromide With bis(cyclopentadienyl)titanium dichloride in diethyl ether T=25°C; 6 h; 2: propionaldehyde in diethyl ether T=0 - 25°C; 2 h;

titanium(IV) isopropylate; ethyl magnesium chloride; propionaldehyde 1.) Et2O, -78 to -35 deg C, 1.5; -35 deg C, 2 h, 2.) -78 deg C, 1 h; Yield given. Multistep reaction. Yields of byproduct given;

titanium(IV) isopropylate; isopropylmagnesium chloride in diethyl ether various titanium alkoxide and Grignard reagents; Product distribution;