Versatile synthesis of α, β-acetylenic ketones by oxidative nucleophilic addition of vanadium acetylides
作者:Toshikazu Hirao、Daisuke Misu、Toshio Agawa
DOI:10.1016/s0040-4039(00)84141-6
日期:1986.1
Treatment of aldehydes with vanadium acetylides generated from equimolar amounts of vanadium trichloride and acetylenic Grignard or lithium compounds gave α,β-acetylenicketones via oxidative nucleophilic addition.
A new method for synthesizing α,β-acetylenic ketones by palladium-mediated coupling of thiol esters with 1-alkynes is described. The reaction could be applied to coupling of thiol esters bearing various functional groups,such as aromatic bromides, and ketones, with functionalized terminal acetylenes.
A facile and efficient synthesis of 1,3-diketones was developed by the gold(I)-catalyzed regioselective hydration of ynones at room temperature. This methodology employed 2.5 mol% of PPh3AuCl and 3 mol% of AgOTf as a simple catalytic system without any special phosphine ligand and was compatible with a wide range of substrates, giving rise to 1,3-diaryl, 1-alkyl-3-aryl-, and 1,3-dialkyl-1,3-diketones
Synthesis of Alkynyl Ketones via Palladium- and Copper-Catalyzed Carbonylative Cross Coupling of Iodonium Salts with Alk-1-ynes
作者:Suk-Ku Kang、Kwon-Ho Lim、Pil-Su Ho、Won-Yeob Kim
DOI:10.1055/s-1997-1285
日期:1997.8
The palladium- and copper-catalyzed coupling of iodonium salts with alk-1-ynes in the presence of atmospheric pressure of carbon monoxide in DME/H2O (4:1) and Pd(OAc)2 (0.2 mol%) [or Pd(OAc)2 with CuI (10 mol%) and NaHCO3 (1.2 equiv)], or CuI (10 mol%) and NaHCO3 (2.2. equiv) at 30°C afforded α,β-acetylenic ketones.