反应详情

To a suspension of 1-(tert-butyldiphenylsilyloxymethyl)-2,6-dimethyl-3-(phthalimidoacetylamino)benzene (57.4 g) and sodium hydride (4.78 g) in N,N-dimethylformamide (287 ml) was dropwise added methyl iodide (15.5 g) under ice-cooling, and the mixture was stirred for 15 minutes at the same temperature and for 2 hours at ambient temperature. Water and ethyl acetate were added thereto, and the resulting precipitate was collected by filtration and washed with water and ethyl acetate to give 1-(tert-butyldiphenylsilyloxymethyl)-2,6-dimethyl-3-[N-methyl-N-(phthalimidoacetyl)amino]benzene (28.18 g) as colorless crystals.

1. temperaturecooling
2. filtrationthe resulting precipitate was collected by filtration
3. washwashed with water and ethyl acetate