1: With n-butyllithium in hexane; toluene T=0 - 5°C; Inert atmosphere; 2: With diisobutylaluminium hydride in hexane; toluene T=0 - 50°C; Inert atmosphere;

12-tungstophosphoric acid immobilized on γ -Fe2O3@SiO2 in water T=20°C; 3 h;