Reacción #833508

Ecuación de reacción

N,N-dimethyl-4-[1,3-thiazol-2-yldiazenyl]aniline

butane sultone

→

4-(2-{[4-(dimethylamino)phenyl]diazenyl}-1,3-thiazol-3-ium-3-yl)-1-butanesulfonate

Rendimiento 87.0%

Disolventes

tetrahydrofuran

Condiciones de reacción

Tratamiento posterior

1. 1
   TemperaturaAfter cooling
2. 2
   Filtraciónthe precipitated product is filtered off
3. 3
   Lavadowashed with acetone
4. 4
   Otrodried
5. 5
   OtroThe dye is recrystallized with methanol/ethyl acetate

Procedimiento

8.5 g (36.6 mmol) of N,N-dimethyl-4-[1,3-thiazol-2-yldiazenyl]aniline are heated with 85 ml of butane sultone at 110° C. for 6 hours. After cooling, 200 ml of tetrahydrofuran are added to the reaction mixture and the precipitated product is filtered off, washed with acetone and dried. The dye is recrystallized with methanol/ethyl acetate. 11.8 g (87% of theory) of 4-(2-{[4-(dimethylamino)phenyl]diazenyl}-1,3-thiazol-3-ium-3-yl)-1-butanesulfonate are obtained as a dark blue power.

Fuente