反应详情

In a manner similar to the method described in example 1b, 2-[2-(tert-Butyl-dimethyl-silanyloxy)-ethoxy]-5-ethyl-benzaldehyde (3.24 g, 10.5 mmol) prepared in example 185a was used as the starting material in place of 3-chloro-benzaldehyde to react with 1,1,1,3,3,3-hexamethyldisilazane (2.18 mL, 10.5 mmol), n-butyllithium (2.5 M, 4 mL, 10.5 mmol), trimethylsilyl chloride (1.1 g, 10 mmol), triethylamine (1.4 g, 13 mmol) and acetyl chloride (1.0 g, 13 mmol) to give 1-{2-[2-(tert-butyl-dimethylsilanyloxy)-ethoxy]-5-ethyl-phenyl}-3-trimethylsilyoxy-2-aza-1,3-butadiene as yellow gum and used for the next step without further purification.