Thiourea → Ethyl 2-amino-5-benzyl-1,3-thiazole-4-carboxylate
反応式
Br[CH:2]([CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[C:3](=O)[C:4]([O:6][CH2:7][CH3:8])=[O:5].[NH2:17][C:18]([NH2:20])=[S:19]>CCO>[NH2:20][C:18]1[S:19][C:2]([CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)=[C:3]([C:4]([O:6][CH2:7][CH3:8])=[O:5])[N:17]=1参加物
4
実験手順
Ethyl 3-bromo-2-oxo-4-phenylbutanoate (5.8 g) was dissolved in EtOH (110 ml), and then thiourea (3.1 g) was added to the solution. The reaction mixture was refluxed for 2 hours under N2 atmosphere. The cooled reaction mixture was evaporated in vacuo. The residual solid was suspended (pH=8) in saturated NaHCO3 and water. The solid was collected by filtration, and purified by flash column chromatography over silica gel with CHCl3/MeOH (10:1) as an eluent to give ethyl 2-amino-5-benzyl-1,3-thiazole-4-carboxylate (808.2 mg) as a yellow wax.