Réaction #4018

Équation de réaction

2-amino-4-trifluoromethylthiophenol hydrochloride

2-chloro-1,1,1-triethoxyethane

→

2-Chloromethyl-5-trifluoromethylbenzothiazole

Solvants

ethanol

Conditions de réaction

Traitement

1. 1
   ConcentrationThe solution was concentrated
2. 2
   Autreto remove excess ethanol
3. 3
   Extractionthe resulting material was extracted with ether (500 ml)
4. 4
   ExtractionThe organic extract
5. 5
   Lavagewas washed successively with 10% HCl (20 ml), water (100 ml), 10% sodium bicarbonate solution and water (100 ml)
6. 6
   Autreevaporated
7. 7
   Autreto obtain an amber colored oil, which
8. 8
   Autrecrystallized
9. 9
   Autreupon standing at room temperature

Mode opératoire

To a solution of 2-amino-4-trifluoromethylthiophenol hydrochloride (30.0 g) in ethanol (125 ml) was added 2-chloro-1,1,1-triethoxyethane (31.0 g). The mixture was heated for 1 hour at 60° C. The solution was concentrated to remove excess ethanol and the resulting material was extracted with ether (500 ml). The organic extract was washed successively with 10% HCl (20 ml), water (100 ml), 10% sodium bicarbonate solution and water (100 ml), and then evaporated to obtain an amber colored oil, which crystallized upon standing at room temperature (28.9 g; m.p. 52° C).

Source