1: With tetrahydropyrrolo[2,1-c][1,2,4]triazole carbene; (Ph)2SiH2 in N,N-dimethyl-formamide; mineral oil T=20°C; Inert atmosphere; 2: With tetrabutyl ammonium fluoride in tetrahydrofuran; N,N-dimethyl-formamide; mineral oil T=20°C; 0.5 h; Inert atmosphere; chemoselective reaction;