Trifluoroacetic acid → 2-(acetylamino)-4-[2-(4-aminophenyl)ethyl]-N-methyl-1,3-thiazole-5-carboxamide
Reaktionsgleichung
[C:1]([NH:4][C:5]1[S:6][C:7]([C:26]([NH:28][CH3:29])=[O:27])=[C:8]([CH2:10][CH2:11][C:12]2[CH:17]=[CH:16][C:15]([NH:18]C(=O)OC(C)(C)C)=[CH:14][CH:13]=2)[N:9]=1)(=[O:3])[CH3:2].FC(F)(F)C(O)=O>>[C:1]([NH:4][C:5]1[S:6][C:7]([C:26]([NH:28][CH3:29])=[O:27])=[C:8]([CH2:10][CH2:11][C:12]2[CH:17]=[CH:16][C:15]([NH2:18])=[CH:14][CH:13]=2)[N:9]=1)(=[O:3])[CH3:2]Komponenten
3
Versuchsvorschrift
tert-Butyl 4-(2-{2-(acetylamino)-5-[(methylamino)carbonyl]-1,3-thiazol-4-yl}ethyl)phenylcarbamate (95 mg) and trifluoroacetic acid (2 ml) were combined at 0° C. The reaction mixture was stirred at room temperature for an hour, and concentrated in vacuo. The residue was dissolved in chloroform. The organic solution was washed with 1N sodium hydroxide solution, water and saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated in vacuo. The residue was purified by preparative silica gel column chromatography with chloroform/methanol (10:1) as an eluent to give 2-(acetylamino)-4-[2-(4-aminophenyl)ethyl]-N-methyl-1,3-thiazole-5-carboxamide (49 mg) as an off-white amorphous substance.