2-Bromoethanol → Benzothiazolium, 3-(2-hydroxyethyl)-6-methoxy-2-methyl-, bromide (1:1)

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 6-methoxy-2-methylbenzothiazole (1.82 g) and 2-bromoethanol (8.8 g) was stirred and heated in an oil bath at 120° C. for 74 hours. After cooling the reaction mixture to room temperature, adding ethyl acetate (25 ml) and stirring for 1 hour, the solid was filtered and collected. The solid was then dissolved in methanol (50 ml) and charcoal (0.5 g) was added. The charcoal was removed by passing through a pad of Celite®. The solution was then concentrated to a small volume and triturated with ethyl acetate (100 ml). The solid was collected, washed with ethyl acetate (2×30 ml) and dried in an oven under high vacuum at 50° C. overnight to obtain 0.9 g (30%) of 4c.

Herkunft & Nachweise