反応 #607436

反応方程式

(2Z)-2-{[(2-bromo-1,3-thiazol-4-yl)methoxy]imino}-N-hydroxy-N-methyl-2-phenylethanimidamide

1,1′-carbonyldiimidazole

→

3-[(Z)-{[(2-bromo-1,3-thiazol-4-yl)methoxy]imino}(phenyl)methyl]-2-methyl-1,2,4-oxadiazol-5(2H)-one

収率 103.9%

溶媒

acetonitrile

反応条件

後処理

1. 1
   その他the reaction was quenched by addition of water (100 ml)
2. 2
   抽出extracted with EtOAc (2×100 ml)
3. 3
   乾燥dried over MgSO4
4. 4
   濃縮concentrated
5. 5
   その他The residue was purified by chromatography on silica gel

実験手順

To a solution of (2Z)-2-{[(2-bromo-1,3-thiazol-4-yl)methoxy]imino}-N-hydroxy-N-methyl-2-phenylethanimidamide (1.8 g, 4.87 mmol, 1 eq.) in acetonitrile (120 ml), was added 1,1′-carbonyldiimidazole (1.58 g, 9.75 mmol, 2 eq.). After stirring at 80° C. for 1 hour, the reaction was quenched by addition of water (100 ml) and extracted with EtOAc (2×100 ml). The organics were combined, dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to give 3-[(Z)-{[(2-bromo-1,3-thiazol-4-yl)methoxy]imino}(phenyl)methyl]-2-methyl-1,2,4-oxadiazol-5(2H)-one (2 g, 100% yield).

出典