A new type of allylation: synthesis of β,γ-unsaturated ketones from α-halogenated aryl ketones using an allyltributyltin(IV)–tin(II) dichloride–acetonitrile system
作者:Makoto Yasuda、Makihiro Tsuchida、Akio Baba
DOI:10.1039/a708679b
日期:——
Allylation of α-halogenated aryl ketones with an allyltributyltinâtin dichlorideâacetonitrile system gave β,γ-unsaturated ketones in high yields via selective aryl rearrangement.
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
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