Acetone → 5-[(4-Methyl-1-piperazinyl)-carbonyl]-7-nitro-1,4-benzodioxane

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

22 ml of water, 22.5 g of 7-nitro-1,4-benzodioxane-5-carboxylic acid, 65 ml of acetone and 10.5 g of triethylamine were introduced into a 250 ml balloon flask provided with an agitator and a thermometer. The mixture was cooled to 10° C. and then 14 g of isobutyl chloroformiate was added. The mixture was agitated and the temperature allowed to rise. The oily compound formed was cooled to 20° C., 11 g of N-methyl piperazine was added and then the mixture was agitated, allowing the temperature to rise. The crystals formed were washed with water. 20.5 g of 5-[(4-methyl-1-piperazinyl)-carbonyl]-7-nitro-1,4-benzodioxane was produced (M.P.: 218° C.; yield: 66.7%).

Herkunft & Nachweise