Reaktion #1583823

Reaktionsgleichung

methyl N-[(5-acetyl-2-chlorophenyl)methyl]acetamide

hydroxylamine

ethanol

→

methyl N-[[2-chloro-5-[1-(hydroxyimino)ethyl]phenyl]methyl]carbamate

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction mixture was heated
2. 2
   Temperaturat refluxed overnight
3. 3
   Einengenconcentrated

Vorschrift

To a solution of methyl N-[(5-acetyl-2-chlorophenyl)methyl]acetamide (0.5 g, 2.1 mmol) (prepared according the method given in European Patent Publication EP 1586552) in ethanol (10 mL) was added an aqueous solution hydroxylamine (50% by wt) (0.82 g, 12.4 mmol). The reaction mixture was heated at refluxed overnight, and then concentrated to provide methyl N-[[2-chloro-5-[1-(hydroxyimino)ethyl]phenyl]methyl]carbamate as a white solid, which was used without purification. To N,N-dimethylformamide (5.0 mL) was added methyl N-[[2-chloro-5-[1-(hydroxyimino)ethyl]phenyl]methyl]carbamate (0.28 g, 1.1 mmol), 3-(chloropropyl)trimethylsilane (0.33 g, 2.2 mmol) and potassium carbonate (0.45 g, 3.3 mmol). This reaction mixture was then heated at 100° C. overnight, and then concentrated under reduced pressure. The resulting oil was purified by medium pressure liquid chromatography (0 to 100% gradient of ethyl acetate in hexanes as eluant) to yield the title compound, a compound of the present invention, as a clear oil. (0.22 g).

Quelle