Ethyl chloroformate → Ethyl 3-methyl-3-[6-(p-chlorophenyl)-3-pyridazinyl]carbazate

Participants

Reaction Steps

A 2.0 g. portion of 6-(p-chlorophenyl)-3-(1-methylhydrazino)pyridazine and 1.30 g. of diisopropylethylamine in 50 ml. of dioxane is warmed slightly in a flask. A 1.0 g. portion of ethyl chloroformate is added and the reaction mixture is stirred for one hour. The dioxane is removed on a rotary evaporator, ethanol and water are added to the residue and a precipitate results. The solid is recrystallized from ethanol to give a pure white solid, m.p. 170°-172° C.

Provenance & Evidence