Mohareb R.M.; El-Sayed N.N.E.; Abdelaziz M.A.
(2012)
The reaction of cyanoacetylhydrazine with chloroacetyl chloride gave N?-(2-chloroacetyl)-2-cyanoacetohydrazide. The latter underwent cyclization to afford 1-(5 amino-3-hydroxy-1H-pyrazol-1-yl)-2-chloroethanone, which ...