反应详情

2-{2-[(tert-Butoxycarbonyl)amino]ethoxy}-5-chloro-3-(1-hydroxyethyl)-6-methylbenzoic acid (27 mg, 0.072 mmol) was stirred in 4.0 M hydrogen chloride in 1,4-dioxane (3 mL) and evaporated. 1-Hydroxybenzotriazole hydrate (13 mg, 0.087 mmol), N,N-diisopropylethylamine (63 μL, 0.36 mmol) and N,N-dimethylformamide (2.0 mL) were added and the mixture was stirred for ten minutes. Benzotriazol-1-yloxytris(dimethylamino)-phosphonium hexafluorophosphate (38 mg, 0.087 mmol) was added and the mixture was stirred at 30° C. overnight. The mixture was diluted with ethyl acetate, washed with brine, dried over sodium sulfate, filtered and evaporated to give the desired product (14 mg, 76%). LCMS calculated for C12H15ClNO3 (M+H)+: m/z=256.1; found: 256.0.

1. customevaporated
2. stirringthe mixture was stirred at 30° C. overnight
3. washwashed with brine
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. customevaporated