反应详情

To 51 g (0.315 mole) of 2,6-dichloroaniline is added 0.4 moles of ethereal HCl and 200 ml of m-cresol. The mixture is then sitrred and heated on a steam bath to drive off the ether and excess hydrogen chloride. To the resultant mixture is then added 17.7 g (0.315 mole) of methyl 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 1-(2,6-dichlorophenyl)-3-methylguanidine hydrochloride.

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