Hydrazine hydrate (1:1) → 2-Amino-4-cyclopropyl-1,3-thiazole-5-carbohydrazide
反応式
Br.[NH2:2][C:3]1[S:4][C:5]([C:11]([O:13]C)=O)=[C:6]([CH:8]2[CH2:10][CH2:9]2)[N:7]=1.O.[NH2:16][NH2:17]>CO>[NH2:2][C:3]1[S:4][C:5]([C:11]([NH:16][NH2:17])=[O:13])=[C:6]([CH:8]2[CH2:10][CH2:9]2)[N:7]=1参加物
4
反応条件
- 温度
- 55 °C
実験手順
Methyl 2-amino-4-cyclopropyl-1,3-thiazole-5-carboxylate hydrobromide (1.78 g) was dissolved in methanol (4.0 ml), hydrazine monohydrate (2.0 ml) was added thereto, followed by stirring at 55° C. for 3 days. After cooling to room temperature, an insoluble substance was filtered, the mother solution was mixed with basic silica gel and the solvent was evaporated under reduced pressure. The residue was purified by basic silica gel chromatography (chloroform:methanol) to obtain, as a dark brown solid, 2-amino-4-cyclopropyl-1,3-thiazole-5-carbohydrazide (224 mg).