反应详情

To a solution of 88.9 g of the product of Example 33 in 565 ml of 90% aqueous acetic acid was added 83 g of iron powder at 80°-90° in several portions. Water (60 ml) was then added and heating continued for 20 minutes. Charcoal (10 g) was added and the solution filtered through Celite® and concentrated in-vacuo. The residue was made strongly alkaline with 20% NaOH solution, then extracted with methylene chloride. The extract was dried and concentrated in-vacuo to give 29.3 g of N-methyl-N-(phenylmethoxy)-2-aminobenzenesulfonamide as a yellow oil. [NMR: δ 5.1 (broad singlet, 2H, NH2)].

1. temperatureheating
2. filtrationthe solution filtered through Celite®
3. concentrationconcentrated in-vacuo
4. extractionextracted with methylene chloride
5. customThe extract was dried
6. concentrationconcentrated in-vacuo