A reaction mixture of β,γ-unsaturatedketone and BF 3 .OEt 2 in CH 3 OH was stirred at room temperature and β-methoxy ketone was produced in high yield. The β-amino ketone was obtained as the major product from a reaction mixture of β,γ-unsaturatedketone, AlCl 3 and Ts-NH 2 in CH 2 Cl 2 at room temperature. This Lewis acid promoted β-substitution reaction mechanism was proposed as that the process
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.