1: With n-butyllithium in tetrahydrofuran T=-30°C; 0.5 h; Inert atmosphere; 2: With trifluoroacetic acid in trifluoroacetic acid Inert atmosphere;

1: (benzylthiomethyl)tributylstannane With alkyl lithium in tetrahydrofuran T=-78°C; 0.166667 h; Inert atmosphere; 2: benzaldehyde in tetrahydrofuran Inert atmosphere; 3: sodium hydrogencarbonate in tetrahydrofuran; water 0.0833333 h; Inert atmosphere;