Enone Synthesis via Palladium Catalyzed Reductive Carbonylation of Terminal Acetylenes
作者:Yoshinao Tamaru、Hirofumi Ochiai、Zen-ichi Yoshida
DOI:10.1016/s0040-4039(01)91188-8
日期:1984.1
Aryl vinyl ketones are prepared by the reaction of aryl iodides and terminal acetylenes in the presence of a catalytic amount of PdCl2(PPh3)2, Cp2TiCl2 and a stoichiometric amount of Zn-Cu under an atmospheric pressure of carbon monoxide.
acids to terminal alkynes under mild conditions affords (E)-α,β-unsaturated ketones with good yields. The reaction was achieved with chloro(1,5-cyclooctadiene)rhodium(I) dimer or chlorodicarbonylrhodium(I) dimer as catalytic precursor without additional phosphine as their use inhibits the reaction. Experiments using deuterated 1-hexyne discarded the possibility of a rhodium-vinylidene intermediate, thus
Palladium-catalyzed coupling reaction of acylzirconocene chlorides with hypervalent iodonium salts: synthesis of aryl-substituted ketones
作者:Suk-Ku Kang、Seok-Keun Yoon
DOI:10.1039/b110983a
日期:2002.2.6
The palladium-catalyzed acylation reaction of alkenoyl- and alkanoylzirconocene chlorides with hypervalent iodonium salts afforded the acylated aromatic compounds under mild conditions.
Gold- and Silver-Catalyzed Reactions of Propargylic Alcohols in the Presence of Protic Additives
作者:Matthew N. Pennell、Peter G. Turner、Tom D. Sheppard
DOI:10.1002/chem.201102830
日期:2012.4.10
secondary and tertiary propargylicalcohols undergo a Meyer–Schusterrearrangement to give enones at room temperature in the presence of a gold(I) catalyst and small quantities of MeOH or 4‐methoxyphenylboronic acid. The syntheses of the enone natural products isoegomaketone and daphenone were achieved using this reaction as the key step. The rearrangement of primary propargylicalcohols can readily be combined