反应详情

A pressure bottle was charged with a solution of 4-(4-azido-2-methyl-3-oxobutan-2-yl)-2-chlorobenzenesulfonamide (8 g, 25.2 mmol) in EtOH (100 mL), conc HCl (20 mL) and PtO2 (114 mg, 0.5 mmol, 0.02 eq) and then was purged with hydrogen (2×45 psi). The bottle was pressurized with hydrogen (45 psi) and agitated 2 h. The reaction mixture was filtered through Celite™ and the filtrate was evaporated. The residue was triturated with Et2O, filtered and dried to afford 4-(4-amino-2-methyl-3-oxobutan-2-yl)-2-chlorobenzenesulfonamide hydrochloride (7.8 g, 94% yield) as yellow solid. 1H NMR (400 MHz, DMSO) δ 8.22 (br s, 3H), 7.91 (d, J=8.4 Hz, 1H), 7.60 (s, 2H), 7.50 (s, 1H), 7.43 (d, J=8.4 Hz, 1H), 3.92 (m, 2H), 1.49 (s, 6H).

1. customwas purged with hydrogen (2×45 psi)
2. filtrationThe reaction mixture was filtered through Celite™
3. customthe filtrate was evaporated
4. customThe residue was triturated with Et2O
5. filtrationfiltered
6. customdried