反应详情

A mixture of 4-[(5-fluoro-2-indolyl)methyl]piperidine (2.9 g), 2-(2-chloroethyl)naphtho[1,8-cd]isothiazole 1,1-dioxide (3.5 g) and sodium hydrogen carbonate (1.1 g) in tetrahydrofuran (30 cc) and dimethylformamide (30 cc) is brought to reflux for 12 hours. After evaporation to dryness at 80° C. under reduced pressure (20 mm Hg; 2.7 kPa), the residue is taken up with water (150 cc) and extracted with ethyl acetate (2×75 cc). The combined organic phases are dried over magnesium sulphate and taken to dryness at 80° C. under reduced pressure (20 mm Hg; 2.7 kPa). The residue is purified by flash chromatography on a silica column under a stream of nitrogen at moderate pressure (0.5-1.5 bar) with a cyclohexane/ethyl acetate mixture (50:50 by volume) as eluent. 2-{2-[4-((5-Fluoro-2-indolyl)methyl)piperidino]ethyl}naphtho[1,8-cd]isothiazole 1,1-dioxide (2.3 g), m.p. 154° C., is obtained.

1. temperatureto reflux for 12 hours
2. customAfter evaporation to dryness at 80° C. under reduced pressure (20 mm Hg; 2.7 kPa)
3. extractionextracted with ethyl acetate (2×75 cc)
4. dry with materialThe combined organic phases are dried over magnesium sulphate
5. customtaken to dryness at 80° C. under reduced pressure (20 mm Hg; 2.7 kPa)
6. customThe residue is purified by flash chromatography on a silica column under a stream of nitrogen at moderate pressure (0.5-1.5 bar) with a cyclohexane/ethyl acetate mixture (50:50 by volume) as eluent