Mild and Highly Selective Ultrasound-Promoted Zinc/Acetic Acid Reduction of C = CBonds in alpha, Beta-Unsaturated gamma-Dicarbonyl Compounds

摘要

Sonication of various, alpha, Beta-unsaturated Gamma-diketones, quinones, alpha-Beta-unsaturated Gamma-diacids or Gamma-diesters with powdered zinc and acetic acid at room temperature results in selective reduction of the C=C bond in each case within ca. 5 minutes to 2.5 h and affords the corresponding reduction products in yields of 94-100%. Isolated (i.e., nonconjugated) C=C bonds are not affected by zinc/acetic acid under these conditions. Zinc-acetic acid reduction, Reduction of C=C, Beta-Unsaturated Gamma-dicarbonyl compounds, Ultrasound.