反应详情

Twenty five milliliters of 2N dimethylamine in tetrahydrofuran were stirred and cooled in an ice bath, and a solution of 1.16 g (2.5 mmoles) of 4-Bromo-but-2-enoic acid [4-(3-bromo-phenylamino)-quinazolin-6-yl]-amide in 20 mL of tetrahydrofuran and 10 mL of N,N-dimethylformamide was added dropwise. After stirring for 2 hours, 45 mL of ethyl acetate and 30 mL of saturated aqueous sodium bicarbonate were added, and the layers were separated. The organic layer was extracted with 25 mL of brine, dried over sodium sulfate, and taken to an oil in vacuo. This was chromatographed on silica gel with 1:4 methanol methylene chloride to give 475 mg (44%) of the desired product, which melted at 215-217° C. Mass spectrum (m/e) M+2H 213.4, 214.4. M+H 426.1.

1. temperaturecooled in an ice bath
2. customthe layers were separated
3. extractionThe organic layer was extracted with 25 mL of brine
4. dry with materialdried over sodium sulfate
5. customThis was chromatographed on silica gel with 1:4 methanol methylene chloride