反应详情

To an ice cooled stirred solution of 0.44 g (1.0 mmol) of the starting material XXVII in 8 ml of chloroform a solution of 0.19 g (1.2 mmol) of bromine in 3 ml of chloroform was added. After 0.5 h the reaction mixture was diluted with 15 ml of chloroform and washed with sodium hydrogen carbonate solution and water. The residue obtained on concentration was stirred with methanol and filtered to yield 0.36 g (82%) of the title compound. Mp.: 296° C. after recrystallization from ethyl acetate.

1. additionwas added
2. washwashed with sodium hydrogen carbonate solution and water
3. customThe residue obtained on concentration
4. filtrationfiltered