Gh. Elgemeie et Nh. Metwally, Novel synthesis of 5-amino-1-arylsulfonyl-4-pyrazolin-3-ones as a new class of N-sulfonylated pyrazoles, J CHEM R-S, (6), 1999, pp. 384-385
A novel synthesis of 5-amino-1-arylsulfonyl-4-pyrazolin-3-ones via intramol
ecular cyclization of cyanoaceto-N-arylsulfonylhydrazides is reported and t
he synthetic potential of the method is demonstrated.