反应详情

2-aminophenol (21.8 g (0.20 mol)) was dissolved in 944 g of DMF, thereto was added 40 mL of 5 mol/L aqueous sodium hydroxide solution (equivalent to 0.20 mol of sodium hydroxide), the resulting mixture was stirred at room temperature for 30 minutes, and then thereto was added a solution obtained by dissolving 50.9 g (0.20 mol) of the obtained S,S′-dimethyl-N-(2-benzothiazolyl)carbonimidodithioate in 1416 g of DMF. The resulting mixture was then heated to 153° C., refluxed under a nitrogen atmosphere for 6 hours, and then cooled to room temperature, and the reaction liquid was added dropwise in 2000 g of water. A precipitate was filtered off, washed with water, and dried to obtain 30.0 g of 2-(2-benzothiazolylamino)benzoxazole (L5: see Table 1 below). The yield was 56.1% based on 2-aminophenol.

1. additionwas added a solution
2. customobtained
3. temperatureThe resulting mixture was then heated to 153° C.
4. temperaturerefluxed under a nitrogen atmosphere for 6 hours
5. temperaturecooled to room temperature
6. customthe reaction liquid
7. filtrationA precipitate was filtered off
8. washwashed with water
9. customdried