Sodium Iodide → 2-{2-[4-(1,2-Benzisoxazol-3-yl)-1-piperazinyl]ethyl}naphtho[1,8-cd]isothiazole 1,1-dioxide

Participants

Reaction Conditions

Reaction Steps

The experiment is carried out as in Example 1, starting with 2-(2-chloroethyl)naphtho[1,8-cd]isothiazole 1,1-dioxide (5.3 g), triethylamine (3 cc) and 4-(1,2-benzisoxazol-3-yl)piperazine (4 g) and sodium iodide (3 g) in dimethylformamide (60 cc). The mixture is heated for 8 hours at boiling point, then cooled to a temperature of about 20° C. After purification by flash-chromatography on silica gel, under a current of argon at medium pressure (0.5-1.5 bar) with ethyl acetate as eluant, and recrystallization from boiling acetonitrile (22 cc), 2-{2-[4-(1,2-benzisoxazol-3-yl)-1-piperazinyl]ethyl}naphtho[1,8-cd]isothiazole 1,1-dioxide (2.3 g) is obtained m.p. 148° C.

Provenance & Evidence