تفاعل #55469

معادلة التفاعل

hydrogen chloride

2,6-dichloroaniline

HCl

m-cresol

sodium hydroxide

cyanamide

→

2,6-dichlorophenylguanidine hydrochloride

المذيبات

ether

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةheated on a steam bath
2. 2
   درجة الحرارةthen heated for 2 hours on a steam bath
3. 3
   درجة الحرارةThe reaction mixture is then cooled
4. 4
   درجة الحرارةcooled
5. 5
   استخلاصextracted with 2 liters of ether
6. 6
   غسيلThe ether layer is washed with 2×1 liter of water
7. 7
   تجفيفdried over sodium sulfate
8. 8
   أخرىevaporated
9. 9
   أخرىThe residue is triturated with hexane
10. 10
    ترشيحthe precipitate is filtered off
11. 11
    غسيلwashed with ether
12. 12
    أخرىdried

الإجراء التجريبي

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 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-dichlorophenylguanidine hydrochloride.

المصدر