1: 3,5-dimethoxybenzyl 3,5-bis(trifluoromethyl)phenyl sulfone With potassium hydroxide; tetrabutylammomium bromide in tetrahydrofuran 0.5 h; 2: 4-methoxy-benzaldehyde in tetrahydrofuran T=20°C; Julia-Kocienski olefination; 16 h;

1: 3,5-dimethoxybenzyl 3,5-bis(trifluoromethyl)phenyl sulfone With potassium hydroxide; tetrabutylammomium bromide in tetrahydrofuran 0.5 h; 2: 4-methoxy-benzaldehyde in tetrahydrofuran T=20°C; Julia-Kocienski olefination; 16 h;