Two earlier attempts2 were made in this Laboratory to solve the problem presented in the reaction between 4-phenylsemicarbazide and acetylacetone. Posner3 worked out the reaction between semicarbazide and acetylacetone, obtaining 3, 5-dimethylpyrazole-l- carbonamide. In our reaction two compounds are produced: one with a low melting point and very soluble in organic solvents; the other of high melting point and insoluble in ...
