1: With 1,1,3,3-tetramethyldisiloxane; titanium (IV) isopropoxide in toluene T=60°C; 24 h; Inert atmosphere; 2: With hydrogenchloride; water in toluene T=20°C; 4 h; Inert atmosphere; Reagent/catalystConcentration; chemoselective reaction;

1: With phthalimide potassium in N,N-dimethyl-formamide 2: With hydrogenchloride; hydrazine hydrate in ethanol

hydrogenchloride Δ;