Abstract
Various β-hydroxyketones and α,β-unsaturated ketones were prepared by the reaction of aldehydes and ketones with 1,4-dianion ( 2 ) which is derived from acetophenone N-ethoxycarbonylhydrazone ( 1 ) with butyllithium. In the reaction of 2 with carbonyl compounds such as ester, amide, acid anhydride, acyl chloride, and alkyl carbonate, pyrazole derivatives were obtained in good yields.
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