Synthesis of β-Amino and β-Methoxy Ketones by Lewis Acids Promoted β-Substitution Reactions of β,γ-Unsaturated Ketones
作者:Adam Shih-Yuan Lee、Shu-Huei Wang、Yu-Ting Chang、Shu-Fang Chu
DOI:10.1055/s-2003-42472
日期:——
A reaction mixture of β,γ-unsaturated ketone 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-unsaturated ketone, 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
将β,γ-不饱和酮和BF 3 .OEt 2 在CH 3 OH中的反应混合物在室温下搅拌,以高产率制备β-甲氧基酮。β-氨基酮作为主要产物由β,γ-不饱和酮、AlCl 3 和Ts-NH 2 在室温下在CH 2 Cl 2 中的反应混合物获得。这种路易斯酸促进 β-取代反应机理被提出,因为该过程通过 β,γ-不饱和酮原位异构化为 α,β-不饱和酮,然后发生 1,4-加成反应。