1: With diisobutylaluminium hydride in hexane; dichloromethane T=-78°C; 3 h; Inert atmosphere; 2: With ammonia; iodine in tetrahydrofuran; hexane; dichloromethane; water T=-78 - 20°C; Inert atmosphere;

triethylsilane; trimethylsilyl trifluoromethanesulfonate; titanium tetrachloride in dichloromethane T=20°C; 20 h;