Reaktion #1786017

Reaktionsgleichung

ammonium chloride

6-(4-methyl4-phenyl-2-oxo-valeroylamino)-4-methyl-2,3-benzoxazin-1-one

methylmagnesium bromide

→

6-(2-hydroxy-2,4-dimethyl4-phenyl-valeroylamino)-4-methyl-2,3-benzoxazin-1-one

Ausbeute 51.9%

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe organic phase is separated
2. 2
   Sonstigedried
3. 3
   Einengenconcentrated by evaporation

Vorschrift

72 mg of 6-(4-methyl4-phenyl-2-oxo-valeroylamino)-4-methyl-2,3-benzoxazin-1-one in 4 ml of tetrahydrofuran is mixed with 3 ml of methylmagnesium bromide (3 mol) at 0° C. After 30 minutes, ammonium chloride solution is added, the organic phase is separated, dried and concentrated by evaporation. After chromatography on silica gel (hexane/ethyl acetate 1:1), 39 mg of 6-(2-hydroxy-2,4-dimethyl4-phenyl-valeroylamino)-4-methyl-2,3-benzoxazin-1-one, melting point 173-175° C., is obtained.

Quelle