反应详情

温度

0 °C

A solution of phenacyl dimethyldithiocarbamate (12.0 grams, 0.050 mole), formaldehyde (4.1 grams of 37% aqueous solution, 0.050 mole), carbon disulfide (1.9 grams, 0.025 mole), and dimethylammonium dimethyldithiocarbamate (8.3 grams, 0.050 mole) in methanol (50 ml.) was stirred and heated at 38° C.-40° C. for 2.5 hours. The reaction mixture was then cooled to 0° C. and the precipitated product was filtered off, washed with cold methanol and dried in air. The yield of product melting at 106° C.-108.5° C. was 17.6 grams (94%). Repeated recrystallization from methylene chloride-methanol and acetone-2-propanol solution without heat gave pure 1-benzoylethylene dimethyldithiocarbamate melting at 106° C.-109.5° C. The structure was determined from the infrared spectrum and elemental analysis.

1. temperatureheated at 38° C.-40° C. for 2.5 hours
2. filtrationthe precipitated product was filtered off
3. washwashed with cold methanol
4. customdried in air
5. customrecrystallization from methylene chloride-methanol and acetone-2-propanol solution
6. temperaturewithout heat