Reaktion #2045093

Reaktionsgleichung

2-bromo-1-(4-chlorophenyl)ethanone

acetonitrile

→

2-amino-1-(4-chlorophenyl)ethanone hydrochloride

Ausbeute 50.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas heated
2. 2
   SonstigeThe formed sodium bromide was removed by filtration
3. 3
   Einengenthe filtrate concentrated in vacuo
4. 4
   workup.DISSOLUTIONThe residue was dissolved in ethanol (2.5 mL per mmol)
5. 5
   workup.ADDITIONconc. aq. hydrochloric acid (0.9 mL per mmol) added at ambient temperature
6. 6
   Filtrationwere filtered off
7. 7
   Waschenwashed with ethanol (1×0.5 mL per mmol)
8. 8
   SonstigeDrying of the solids

Vorschrift

A mixture of 2-bromo-1-(4-chlorophenyl)ethanone (1.0 eq.) and NaN(CHO)2 (1.1 eq.) in acetonitrile (1.5 mL per mmol) was heated to reflux for 4 h at 105° C. ext. temperature. The formed sodium bromide was removed by filtration and the filtrate concentrated in vacuo. The residue was dissolved in ethanol (2.5 mL per mmol) and conc. aq. hydrochloric acid (0.9 mL per mmol) added at ambient temperature. After stirring for 72 h at room temperature the solids were filtered off and washed with ethanol (1×0.5 mL per mmol). Drying of the solids afforded 2-amino-1-(4-chlorophenyl)ethanone hydrochloride in ca. 50% yield that was used in the next step without purification.

Quelle