Bromine → HCID 18958836, compound

Participants

Reaction Steps

A solution of 10 g of 7-n-propyl-5-methyl-1,2,4-triazolo[1,5-c]pyrimidin-2(3H)-one, prepared in Example 193, in 120 ml of acetic acid containing 12 g of sodium acetate, and to which a solution of 2.6 ml of bromine in 50 ml of acetic acid has been added dropwise, is stirred at room temperature for 3 hours. The reaction mixture is then concentrated under vacuum and thereafter treated with water. The crystals formed are drained, washed with water and dried. 7 g of 7-n-propyl-5-methyl-8-bromo-1,2,4-triazolo[1,5-c]pyrimidin-2(3H)-one are thereby obtained in the form of crystals of melting point 221° C.

Provenance & Evidence