Réaction #698629

Équation de réaction

[4-(6-methoxy-benzothiazol-2-ylazo)phenyl]-dimethyl-amine

dimethyl sulfate

→

title compound

2-[[4-(Dimethylamino)phenyl]azo]-6-methoxy-3-methylbenzothiazol-3-ium methylsulfate

Solvants

chlorobenzene

Conditions de réaction

Traitement

1. 1
   TempératureThe solution was cooled
2. 2
   Autresolid formed
3. 3
   FiltrationThe mixture was filtered
4. 4
   Lavagethe solid was washed with diethyl ether
5. 5
   Autrerecrystallized from ethanol

Mode opératoire

A solution of [4-(6-methoxy-benzothiazol-2-ylazo)phenyl]-dimethyl-amine (Example 4b, 0.75 g, 2.40 mmol) and dimethyl sulfate (0.50 mL, 5.28 mmol) in 15 mL of chlorobenzene was heated under nitrogen at 70° C. for 3 hours. The solution was cooled and solid formed. The mixture was filtered, the solid was washed with diethyl ether and recrystallized from ethanol to give the title compound as a dark blue-black solid, mp 206-207° C., dec.

Source