Reaktion #2374033

Reaktionsgleichung

3,4-Dihydro-6-hydroxy-2-trichloromethyl-2H-benzo[e]-[1,3]-oxazin-4-one

acetic anhydride

→

6-acetoxy-3,4-dihydro-2-trichloromethyl-2H-benzo[e]-[1,3]-oxazin-4-one

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigewere stirred for 40 hours at room temperature
2. 2
   Filtrationthe mixture was filtered
3. 3
   Waschenthe solid product was washed with acetic anhydride

Vorschrift

3,4-Dihydro-6-hydroxy-2-trichloromethyl-2H-benzo[e]-[1,3]-oxazin-4-one (prepared as described in Example 3--5.0 g.) and acetic anhydride (250 ml.) were stirred for 40 hours at room temperature, the mixture was filtered, and the solid product was washed with acetic anhydride, then diethyl ether, to give 6-acetoxy-3,4-dihydro-2-trichloromethyl-2H-benzo[e]-[1,3]-oxazin-4-one, m.p. 201°-203° C.

Quelle