反应详情

The procedure of Example 4 is followed but starting with triethylammonium (6-ethylpyrid-2-yl)dithiocarbamate (72.0 g) and 1-chlorobutan-2-one (25.5 g) in anhydrous acetonitrile (400 cc) at a maximum temperature of 25° C. The reaction is continued for 4 hours at 20°-25° C. The product is purified by chromatography over silica (470 g; 0.063-0.200 mm) contained in a column 3.8 cm in diameter, eluting with chloroform (5 liters). The chromatographed product (43.0 g) is recrystallised from ethanol (120 cc) to give 4-ethyl-3-(6-ethylpyrid-2-yl)-4-hydroxythiazolidine-2-thione (37.2 g) melting at 84° C.

1. customThe product is purified by chromatography over silica (470 g; 0.063-0.200 mm)
2. washeluting with chloroform (5 liters)
3. customThe chromatographed product (43.0 g) is recrystallised from ethanol (120 cc)