4 A molecular sieve; tri-phenylphosphine sulphide; 2,6-bis-((2R)-2-(2,2-diphenylcarbinol)azolidine)-p-cresol; diethylzinc in tetrahydrofuran; hexane T=5°C; 48 h;

NdI3 in dichloromethane T=0°C; Reformatsky reaction; 18 h;

1: With 2,3,5,5-tetramethyl-5-sila-2-oxazolinium tetrakis[3,5-bis-(trifluoromethyl)phenyl]borate in dichloromethane T=20°C; 10 h; Inert atmosphereSchlenk technique; 2: With ammonium chloride in dichloromethane Inert atmosphereSchlenk technique;

1: 1.) N-BuLi, HMPA / tetrahydrofuran / 3 h / -90 °C 2: Na/Hg, NaH2PO4 / methanol / -20 °C 3: Cu2+ View Scheme

1: 1.) N-BuLi, HMPA / tetrahydrofuran / 3 h / -90 °C 2: Na/Hg, NaH2PO4 / methanol / -20 °C 3: Cu2+ View Scheme

1: Na/Hg, NaH2PO4 / methanol / -20 °C 2: Cu2+ View Scheme

Cu Yield given;