反应详情

To 36 g. (0.315 mole) of 2,6-dimethylaniline is added 0.4 moles of ethereal HCl and 200 ml of m-cresol. The mixture is then stirred and heated on a steam bath to drive off the ether and excess hydrogen chloride. To the resultant mixture is then added 13.3 g. (0.315 mole) of cyanamide then heated for 2 hours on a steam bath. The reaction mixture is then cooled, added to 150 ml. of conc. sodium hydroxide solution, cooled and extracted with 2 liters of ether. The ether layer is washed with 2×1 liter of water, dried over sodium sulfate, charcoaled and evaporated. The residue is triturated with hexane and the precipitate is filtered off and washed with ether and dried to obtain 2,6-dimethylphenylguanidine.

1. temperatureheated on a steam bath
2. temperatureThe reaction mixture is then cooled
3. additionadded to 150 ml
4. extractionextracted with 2 liters of ether
5. washThe ether layer is washed with 2×1 liter of water
6. dry with materialdried over sodium sulfate
7. customevaporated
8. customThe residue is triturated with hexane
9. filtrationthe precipitate is filtered off
10. washwashed with ether
11. customdried