Different synthetic strategies to 4,4-disubstituted pyridazines and condensed pyridazines
with a special reference to the synthetic routes to their spiro analogues are comprehensively
outlined in this review.
Keywords: Spirocyclic pyridazines, partially-saturated pyridazines, synthesis, retro-
Diels-Alder, 1, 3-dipolar cycloaddition, Aza-Michael addition, nucleophilic reactions.
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