1: With n-butyllithium in tetrahydrofuran; hexane T=-70°C; 1 h; 2: With isopropyldiisopropoxyborane in tetrahydrofuran; hexane T=-70 - 20°C; 1.16667 h; 3: With water; ammonium chloride in tetrahydrofuran; hexane; isopropyl alcohol 0.5 h;