2-Amino-2-thioxoethyl 2,2-dimethylpropanoate → Methyl 3-[2-hydroxymethyl-5-methyl-thiazol-4-yl]-benzoate
反応式
[CH3:1][O:2][C:3](=[O:17])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([C:10](=O)[CH:11](Br)[CH2:12]CC)[CH:5]=1.C(C([O:24][CH2:25][C:26]([NH2:28])=[S:27])=O)(C)(C)C>CCO>[CH3:1][O:2][C:3](=[O:17])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([C:10]2[N:28]=[C:26]([CH2:25][OH:24])[S:27][C:11]=2[CH3:12])[CH:5]=1参加物
4
反応条件
- 温度
- 60 °C
実験手順
A sample of rac-3-(2-bromo-pentanoyl)-benzoic acid methyl ester (0.60 g) and and 2-(tert.-butylcarbonyloxy)thioacetamide (0.36 g) in EtOH (4 mL) was heated at reflux for 5 h. The mixture was partitioned between AcOEt and 5% NaHCO3 solution, the organic layer was washed with brine, dried and evaporated. A solution of the residual oil and of NaOMe (0.13 g) in MeOH (10 mL) was stirred at 60° C. for 30 min. The solution was diluted with AcOEt, washed with 1N HCl and brine, dried and evaporated to give 3-(2-hydroxymethyl-5-methyl-thiazol-4-yl)-benzoic acid methyl ester (0.44 g) as an oil.