反应详情

6.9 g of 4-(2,3-dihydro-2,2-dimethyl-6-benzofuranylmethyloxy)aniline was dissolved into 70 ml of N,N-dimethylformamide, and 2.8 g of triethylamine was added thereto. 3.8 g of N-methoxy-N-methylcarbamoyl chloride was slowly added dropwise thereto. After the mixture was stirred at room temperature, the reaction mixture was poured into water and extracted with ethyl acetate. After the organic layer was washed with water, it was dried over anhydrous magnesium sulfate. Ethyl acetate was distilled off and the residue was subjected to silica gel column chromatography using ethyl acetate/n-hexane (1/2) as a developer to obtain 6.0 g of Compound No. 4 shown in Table 1.

1. additionwas added
2. extractionextracted with ethyl acetate
3. washAfter the organic layer was washed with water, it
4. dry with materialwas dried over anhydrous magnesium sulfate
5. distillationEthyl acetate was distilled off