Two new series of benzenesulfonamide (4a–f, 5a–b, 6, 7) and 1, 2-benzisothiazol-3 (2H)- one-1, 1-dioxide (9a–c, 10, 12a–d) derivatives were prepared starting from saccharin sodium. The novel compounds were characterized using elemental analyses and different
![9,9-dioxo-8-propan-2-yl-9$l^{6}-thia-8-azabicyclo[4.3.0]nona-1,3,5-trien-7-one Structure](https://image.chemsrc.com/caspic/413/91950-12-8.png)