Reaktion #607429

Reaktionsgleichung

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

triethylamine

4-fluorophenyl chloroformate

→

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

Ausbeute 104.2%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe reaction was quenched by addition of water (50 ml)
2. 2
   Extraktionextracted with EtOAc (2×150 ml)
3. 3
   Trocknendried over MgSO4
4. 4
   Einengenconcentrated
5. 5
   SonstigeThe residue was purified by chromatography on silica gel

Vorschrift

To a solution of (2Z)-2-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}-N-hydroxy-N-methyl-2-phenylethanimidamide (5.00 g, 16.37 mmol, 1 eq.) and triethylamine (2.28 ml, 16.37 mmol, 1 eq) in DMF (100 ml) at 0° C., was added dropwise 4-fluorophenyl chloroformate (28.58 g, 16.37 mmol, 1 eq.). After stirring at 0° C. for 1 hour, the reaction was quenched by addition of water (50 ml) and extracted with EtOAc (2×150 ml). The organics were combined, dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to give 3-[(Z)-{[(2-amino-1,3-thiazol-4-yl)methoxy]imino}(phenyl)methyl]-2-methyl-1,2,4-oxadiazol-5(2H)-one (5.65 g, 96% yield).

Quelle