A Mild Isomerization Reaction for β,γ-Unsaturated Ketone to α,β-Unsaturated Ketone
作者:Adam Shih-Yuan Lee、Mei-Chun Lin、Shu-Huei Wang、Li-Shin Lin
DOI:10.1002/jccs.200400058
日期:2004.4
A series of β,γ-unsaturated ketones were isomerized to their corresponding α,β-unsaturatedketones by the introduction of DABCO in iPrOH at room temperature. The endo-cyclic doublebond (β,γ-position) on ketone was rearranged to exo-cyclic doublebond (α,β-position) under the reaction conditions.
The enolates produced from the conjugate addition reaction of lithium dialkylcuprates with α,β- unsaturated ketones react with aldehydes in the presence of zinc chloride to give overall β-alkyl α-hydroxyalkyl addition to the original alkene. Reaction of these enolates with carbon dioxide and ethyl formate is also reported.
FACILE SYNTHESIS OF BENZYL KETONES BY THE REDUCTIVE COUPLING OF BENZYL BROMIDE AND ACYL CHLORIDES IN THE PRESENCE OF A PALLADIUM CATALYST AND ZINC POWDER
Benzyl ketones were obtained in good yields from benzyl bromide and acyl chlorides by the combined use of Zn and a palladium catalyst under mild conditions.
Synthesis of 3-substituted indole by AlCl3-promoted reaction of β,γ-unsaturated ketone with indole
作者:Adam Shih-Yuan Lee、Yu-Chi Wu、Yu-Ting Chang、Bo-Cheng Wang
DOI:10.1007/s11164-014-1605-x
日期:2014.7
acid-promoted reaction condition of β,γ-unsaturated ketone with indole was developed for the synthesis of 3-substituted indoles with moderate to good yields. A Lewis acid such as AlCl3 was shown to be a promising promoter for in situ isomerization of β,γ-unsaturated ketone to its corresponding α,β-unsaturated ketone, then undergoing Friedel–Crafts Michael addition reaction with indole to afford 3-substituted
Synthesis of acyloin natural products by Mukaiyama hydration
作者:Michael Ricca、Wei Zhang、Jiaqi Li、Thomas Fellowes、Jonathan M. White、Paul S. Donnelly、Mark A. Rizzacasa
DOI:10.1039/d2ob00651k
日期:——
The acyloin natural products are a family of bioactive compounds isolated from fungi and myxobacteria. The total synthesis of 7 members of the acyloin family was achieved via a HWE reaction followed by Mukaiyama–Isayama hydration, using novel Co(II) and Co(III) Schiff base SALPN complexes as catalysts for the key enone hydration step. Furthermore, we have shown that a mild acyloin rearrangement is