1: With (.eta.(5):.eta.(1)-C5H4SiMe2NtBu)TiMe2 in toluene T=105°C; 24 h; Inert atmosphere; 2: With sodium cyanoborohydride; zinc(II) chloride in methanol; toluene T=25°C; 24 h; Inert atmosphere; regioselective reaction;

(.eta.(5):.eta.(1)-C5H4SiMe2NtBu)TiMe2 in toluene T=105°C; 24 h; Inert atmosphere; regioselective reaction;

lithium diethylamide in diethyl ether T=0 - 20°C;

aluminium telluride; water; triethylamine in tetrahydrofuran Heating; Yield given;

1: Al2Te3, Et3N / tetrahydrofuran / Heating 2: Al2Te3, Et3N, H2O / tetrahydrofuran / Heating View Scheme