tetrabutyl ammonium fluoride in tetrahydrofuran T=60°C; 3 h;

tetrabutyl ammonium fluoride in tetrahydrofuran T=60°C; 1.75 h;

1: 1-[(4-methylphenyl)sulfinyl]-2-(trimethylsilyl)ethane With lithium diisopropyl amide in tetrahydrofuran T=0°C; 0.25 h; 2: (E)-N-(2,2,2-trifluoroethylidene)-4-methoxyaniline in tetrahydrofuran T=-78 - 20°C; Further stages.;