Synthesis, spectral, crystal and theoretical studies of some novel 4-heterocyclic substituted pyrazolones

Article abstract of DOI:10.1016/j.molstruc.2013.10.018

Reactions of pyrazolone ketene dithioacetals with various binucleophiles afforded 4-heterocyclic substituted pyrazolone compounds as ketene N,N-, N,O-acetals in the absence of any acid/base catalyst in good yields. The products 3a-i formed by the direct d