Triethylamine → 2-{3-[4-(3-Hydroxyphenyl)-1-piperazinyl]propyl}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-(3-chloropropyl)naphtho[1,8-cd]isothiazole 1,1-dioxide (11.2 g), triethylamine (16.8 cc) and 4- (3-hydroxyphenyl)piperazine dihydrobromide (13.6 g) in dimethylformamide (250 cc). The mixture is heated for 6 hours at boiling point, then cooled to a temperature of about 20° C. Stirring is maintained for 6 hours at this temperature. After purification by crystallization from isopropyl oxide (30 cc), then recrystallization from boiling acetonitrile (125 cc), 2-{3-[4-(3-hydroxyphenyl)-1-piperazinyl]propyl}naphtho[1,8-cd]isothiazole 1,1-dioxide (4.6 g) is obtained, m.p. 175° C.

Provenance & Evidence