反应详情

1.31 g. of sodium hydride (55% strength suspension) are added to a solution of 6.15 g. of 2-[(2,6-dichlorophenyl)imino]-1-hydroxyimidazolidine in 45 ml. of absolute dimethylformamide at a temperature of 25°. After 30 minutes, 4.16 g. of propargyl bromide are added dropwise. After 30 minutes, the mixture is poured onto 500 ml. of a saturated solution of sodium chloride and the aqueous phase is extracted with ether. The ether extracts are washed with aqueous hydrochloric acid. The aqueous extracts are then rendered basic with 3 N caustic soda solution and extracted with ether. After evaporating off the solvent, the residue is dissolved in ether, and hydrogen chloride in dioxane is added. The residue is recrystallized from methanol/acetonitrile, whereupon 2-[(2,6-dichlorophenyl)imino]-1-(2-propynyloxy)-imidazolidine hydrochloride, m.p. 198°-199° (from methanol/acetonitrile) is obtained.

1. customat a temperature of 25°
2. waitAfter 30 minutes
3. additionthe mixture is poured onto 500 ml
4. extractionof a saturated solution of sodium chloride and the aqueous phase is extracted with ether
5. washThe ether extracts are washed with aqueous hydrochloric acid
6. extractionextracted with ether
7. customAfter evaporating off the solvent
8. dissolutionthe residue is dissolved in ether
9. additionhydrogen chloride in dioxane is added
10. customThe residue is recrystallized from methanol/acetonitrile, whereupon 2-[(2,6-dichlorophenyl)imino]-1-(2-propynyloxy)-imidazolidine hydrochloride
11. customm.p. 198°-199° (from methanol/acetonitrile) is obtained