1: 2-((2-(methoxy)ethoxy)methoxy)-1,1,1-trifluoroethane With lithium diisopropyl amide in tetrahydrofuran; hexane T=-78 - -65°C; 2.5 h; Inert atmosphere; 2: With tri-isopropoxy-borane in tetrahydrofuran; hexane T=-65 - -30°C; 4 h; Inert atmosphere; 3: 3-hydroxy-2,2-dimethylpropanol Further stages;