反应详情

In a manner similar to the method described in example 190b, 5-iodo-2-methylbenzaldehyde prepared in example 198a (5.4 g, 22 mmol) was used as the starting material in place of 2-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxy]-5-iodo-benzaldehyde to react with 1,1,3,3,3-hexamethyldisilazane (3.53 g, 22 mmol), n-butyllithium (2.5 M, 8.8 mL, 22 mmol), trimethylsilyl chloride (2.22 g, 22 mmol), triethylamine (3 mL, 30 mmol) and acetyl chloride (2.34 g, 30 mmol) to give crude 1-(5-iodo-2-methylphenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene as a yellow gum and used for the next step without further purification.