Cp2Zr(OSO2C8H17)2 in toluene T=110°C; 6 h; chemoselective reaction;

1: With ethyl orthotitanate in n-heptane 1 h; Heating; 2: With hydrogenchloride in acetonitrile Heating;

1: 2-Brom-1,3-bis-(p-chlorphenyl)-propan-1,3-dion With triethyl phosphite in tetrahydrofuran T=20°C; 1 h; 2: Me2Cu(CN)Li2 With boron trifluoride diethyl etherate in tetrahydrofuran; diethyl ether T=-78°C; 2 h;