反应详情

10 mmol of 2-amino-1-(3,4-dimethoxyphenyl)-ethanol is dissolved in 6 ml. of pyridine and, under cooling to 0°, combined dropwise with 11 mmol of carbon disulfide in 10 mmol of triethylamine. During this step, the temperature rises greatly. The mixture is agitated for one hour at 0° and then, at the same temperature, 10 mmol of benzyl choride is added dropwise thereto. After agitation overnight at 0°, the batch is taken up in 40 ml. of 3 N sulfuric acid and extracted three times with respectively 50 ml. of chloroform. The combined chloroform phases are washed in succession with sodium bicarbonate and water, dried, filtered, and concentrated. The residue, which crystallizes spontaneously, is recrystallized from benzene and ethyl acetate, thus obtaining in a quantitative yield the benzyl ester of [2-(3,4-dimethoxyphenyl)-2-hydroxyethyl]-dithiocarbamic acid, m.p. 130°-132°.

1. waitAfter agitation overnight at 0°
2. extractionof 3 N sulfuric acid and extracted three times with respectively 50 ml
3. washThe combined chloroform phases are washed in succession with sodium bicarbonate and water
4. customdried
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue, which crystallizes spontaneously
8. customis recrystallized from benzene and ethyl acetate