Ammonia → 6-Bromo-2,2-dioxo-3-methyl-1,2-benzoxathiin-8-ylsulfonamide
Reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([S:15](Cl)(=[O:17])=[O:16])[C:5]2[O:10][S:9](=[O:12])(=[O:11])[C:8]([CH3:13])=[CH:7][C:6]=2[CH:14]=1.[NH3:19]>O1CCCC1>[Br:1][C:2]1[CH:3]=[C:4]([S:15]([NH2:19])(=[O:17])=[O:16])[C:5]2[O:10][S:9](=[O:12])(=[O:11])[C:8]([CH3:13])=[CH:7][C:6]=2[CH:14]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 20 °C
Procedure
72.2 g of 6-bromo-2,2-dioxo-3-methyl-1,2-benzoxathiin-8-ylsulfonyl chloride are dissolved in 200 ml of tetrahydrofuran and the solution is added dropwise to 122.6 ml of a 30% aqueous solution of ammonia. The mixture is stirred for 30 minutes at 20° C. and concentrated under reduced pressure at 45° C. The residue is triturated with ether. The precipitate so obtained is isolated, washed with water and dried at 45° C., affording 44.6 g of 6-bromo-2,2-dioxo-3-methyl-1,2-benzoxathiin-8-ylsulfonamide.