Reaktion #87860

Reaktionsgleichung

sodium sulphide

sulphur

2-bromo-1-isopropyl-4-nitrobenzene

2-Bromo-1-isopropyl-4-nitrobenzene

→

3-Bromo-4-isopropylaniline

Ausbeute 103.2%

Lösungsmittel

Isopropanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGAfter stirring for another 5 hours
2. 2
   workup.DISTILLATIONFor the work-up, the isopropanol was firstly distilled off
3. 3
   Extraktionthe remaining mixture was extracted with toluene/chlorobenzene
4. 4
   workup.DISTILLATIONThe combined organic phases were distilled under reduced pressure

Vorschrift

A solution of sodium sulphide (31.2 g, 0.24 mol) and sulphur (7.7 g, 0.24 mol) was stirred at 80° C. for 15 minutes. Isopropanol (160 g) was subsequently added and the mixture was stirred at 75° C. for a further 15 minutes and 2-bromo-1-isopropyl-4-nitrobenzene (XI) (50 g, 0.19 mol) was finally added dropwise over a period of 30 minutes. After stirring for another 5 hours, the reaction was complete. For the work-up, the isopropanol was firstly distilled off and the remaining mixture was extracted with toluene/chlorobenzene. The combined organic phases were distilled under reduced pressure. 3-Bromo-4-isopropylaniline (42 g, 91 GC-% by area, 93% of theory) was obtained as a red oil.

Quelle