反应详情

hydrochloride. To a stirred solution of tert-butyl(3S)-3-({[2-[(aminocarbonyl)amino]-5-(4-methoxyphenyl)-3-thienyl]carbonyl}amino)piperidine-1-carboxylate (0.70 g, 1.47 mmol) in anhydrous MeOH (5.0 mL) was added 4.0N HCl in 1,4-dioxane (10 mL). A small amount of precipitate forms shortly and the reaction is stirred for an additional 4 h at room temperature. The solvent was removed under vacuum. The residue was redissolved in methanol and concentrated under vacuum (2×) to yield 0.51 g (85%) of a light yellow solid. 1H NMR (d6-DMSO δ 10.9, s, 1H; δ 9.39, br s, 1H; δ 9.20, br s, 1H; δ 8.37, d, 1H; δ 7.88, s, 1H; δ 7.49, d, 2H; δ 6.96, d, 2H; δ 6.97, br s, 2H; δ 4.24, m, 1H; δ 3.77, s, 3H; δ 3.29, m, 1H; δ 3.11, m, 1H; δ 2.93, m, 2H; δ 1.91, m, 2H; δ 1.68, m, 2H), LC/MS (APCI, ES, M+H=6875).

1. customThe solvent was removed under vacuum
2. dissolutionThe residue was redissolved in methanol
3. concentrationconcentrated under vacuum (2×)