反应详情

A solution of N1-(cyclopentyloxy)-3-nitro-1-benzenesulfonamide (2.98 g, 10.41 mmol) in 50 mL of absolute ethanol was combined with 5 wt % Palladium on barium sulfate (300 mg) and reduced under a balloon of hydrogen gas with vigorous agitation for 18 hours. The mixture was filtered, washed with ethanol, and evaporated in vacuo to a residue. The crude product was purified on flash grade silica gel eluting with 4:1 hexane:ethyl acetate. Fractions containing the product were combined, evaporated in vacuo and dried under vacuum to provide 3-amino-N1-(cyclopentyloxy)-1-benzenesulfonamide (2.67 g, 100%) as an oil. H1-NMR (chloroform-D3): 1.62 (m, 8H), 3.92 (bs, 2H), 4.58 (m, 1H), 6.74 (bs, 1H), 6.88 (m, 1H), 7.16 (m, 1H), 7.27 (m, 2H). MS(ESI): 257(MH+).

1. filtrationThe mixture was filtered
2. washwashed with ethanol
3. customevaporated in vacuo to a residue
4. customThe crude product was purified on flash grade silica gel eluting with 4:1 hexane
5. additionFractions containing the product
6. customevaporated in vacuo
7. customdried under vacuum