反应详情

A 4.0 g. portion of ethyl 3-[6-(p-bromophenyl)-5-methyl-3-pyridazinyl]carbazate and 0.9 g. of 10% palladium on carbon catalyst in 100 ml. of ethanol and 50 ml. of ammonium hydroxide is shaken under 40 lb. of hydrogen pressure for 4 hours with external heating of the bottle by means of a heated jacket. The reaction mixture is suction filtered and the filtrate is concentrated to a light yellow oil which is scratched with petroleum ether to give a white solid, m.p. 142°-145° C.

1. filtrationfiltered
2. concentrationthe filtrate is concentrated to a light yellow oil which
3. customto give a white solid, m.p. 142°-145° C.