反应详情

0.10 g of sodium iodide is added to a mixture of 9.3 g (0.0226 mole) of 1-[2-(o-chlorobenzoyl)-4-chlorophenyl]-5-(chloromethyl)-1H-1,2,4-triazole-3-carboxylic acid (see German `Offenlegungsschrift` No. 2,159,527, page 32) and 9.5 g (0.11 mole) of morpholine in 100 ml of ethanol, and the whole is refluxed for 2 hours. The reaction mixture is thereupon concentrated in vacuo; the residue is dissolved in water, and 2 N hydrochloric acid is added until an acid reaction to Congo red is obtained. The precipitated hydrochloride of the reaction product is extracted twice with 100 ml of methylene chloride each time. After washing with saturated sodium chloride solution, drying over sodium sulphate and concentration by evaporation, the organic extracts yield 1-[2-(o-chlorobenzoyl)-4-chlorophenyl]-5-(morpholinomethyl)-1H-1,2,4-triazole-3-carboxylic acid hydrochloride in the form of an amorphous yellow foam, which is used directly for the next step.

1. concentrationThe reaction mixture is thereupon concentrated in vacuo
2. dissolutionthe residue is dissolved in water
3. addition2 N hydrochloric acid is added until an acid reaction to Congo red
4. customis obtained
5. extractionThe precipitated hydrochloride of the reaction product is extracted twice with 100 ml of methylene chloride each time
6. washAfter washing with saturated sodium chloride solution
7. dry with materialdrying over sodium sulphate and concentration by evaporation