Sodium Hydroxide → HCID 13686018, compound

Participants

Reaction Steps

A 10.0 g (0.03 mole) amount of 5-[4-(4-phenoxybutyl)-1-piperazinyl]-4H-1,2,4-triazol-3-amine, dihydrochloride was partially dissolved in 20 ml of water, then 5N sodium hydroxide was added to adjust the pH to just greater than pH 7, resulting in formation of a solid. The solid was collected by filtration and washed with water. The colorless crystals, were transfered into a 125 ml round bottom flask and dissolved in 50 ml of ethanol. Then 7.5 g (0.05 moles) of bromomalonaldehyde was added and the mixture was heated at reflux for 7 hours. The reaction mixture was cooled and filtered. The filter was washed with ethanol/ether, then ether. The filtrate was evaporated in vacuo, combined with the filter cake, extracted with hot chloroform and filtered. The filtrate was passed through a pad of magnesium silicate and the pad was washed with chloroform. The combined chloroform filtrate and wash was evaporated to a syrup. Crystallization from ethanol gave 2.2 g of the desired product as pale yellow crystals, mp 122°-123° C.

Provenance & Evidence