Reaktion #57292

Reaktionsgleichung

8

4-cyclopropylethynyl-6-(2-methoxy-ethoxymethoxy)-4-trifluoromethyl-1,4-dihydro-benzo[d][1,3]oxazin-2-one

trifluoroacetic acid

→

9

Ausbeute 96.0%

4-cyclopropylethynyl-6-hydroxy-4-trifluoromethyl-1,4-dihydro-benzo[d][1,3]oxazin-2-one

Ausbeute 96.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   EinengenThe reaction mixture was concentrated under reduced pressure
2. 2
   Sonstigethe residue was purified by preparative thin layer chromatography (2 mm silica gel plate, E. Merck)

Vorschrift

To 150 mg (0.39 mmol) of 8 was added 2 mL of trifluoroacetic acid. The mixture was allowed to stir at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure, and the residue was purified by preparative thin layer chromatography (2 mm silica gel plate, E. Merck) using 5% methanol in dichloromethane to give 110 mg (0.37 mmol, 96%) of 9 as a colorless oil [LC-MS; M+H 298.1].

Quelle