Hydrochloric Acid → HCID 178462988, compound

Participants

Reaction Steps

To a solution of hydrazine monohydrate (10.0 g) in ethanol (100 ml), ethyl glycolate (20.8 g) was slowly added dropwise with keeping the reaction temperature under 10° C. at room temperature. The mixture was stirred for 5 hours at room temperature, and ethyl isothiocyanate (17.42 g) was slowly added dropwise to the mixture with keeping the reaction temperature under 10° C. The mixture was stirred for 18 hours at 40° C., cooled to room temperature, and ice-water (50 ml) was added to the mixture. The mixture was stirred for 15 miuntes, 5N aqueous solution of sodium hydroxide (40 ml) was added to the mixture, and the mixture was stirred for 4 hours at 60° C. Concentrated hydrochloric acid was added dropwise to the solution at 0° C. to adjust pH to 6, and the precipitated crystals were removed by filtration. The mixture was concentrated under reduced pressure, and the precipitated crystals were collected by filtration. The crystals were washed with water, to give 4-ethyl-3-hydroxymethyl-5-mercapto-4H-1,2,4-triazole (7.5 g) as colorless crystals.

Provenance & Evidence