Ethanolamine → HCID 22918635, compound

Participants

Reaction Steps

3.61 (10 mmoles) of 1-benzyl-3,5-dibromo-4-nitropyrazole are heated at 80° C. in 15 ml ethanolamine for 2 hours. After cooling, the reaction mixture is poured on 30 ml water and the separated precipitate is collected by filtration. After recrystallizing once from toluene, 2.5 g (74 percent of theory) of 1-benzyl-3-bromo-5-(2'-hydroxyethyl)amino-4-nitropyrazole are obtained in the form of pale yellow crystals with a melting point of 110° to 112° C.

Provenance & Evidence