Riluzole → 3-(But-3-en-1-yl)-6-(trifluoromethoxy)-1,3-benzothiazol-2(3H)-imine--hydrogen bromide (1/1)

Participants

Reaction Conditions

Reaction Steps

The procedure is as in Example 15, starting with 2-amino-6-trifluoromethoxybenzothiazole (9.4 g) and 4-bromo-1-butene (10.8 g) in 2-propanol (30 cc). The mixture is heated for 48 hours to boiling. After cooling of the mixture to a temperature in the region of 20° C., the precipitate is filtered off and then washed with 2-propanol (2×50 cc). 3-(3-Butenyl)-2-imino-6-trifluoromethoxybenzothiazoline hydrobromide (2.5 g), m.p. 202° C., is obtained.

Provenance & Evidence