Oxidative addition of azide anion to triisopropylsilyl enol ethers: Synthesis of α-azido ketones and 2-amino(methoxycarbonyl)alk-2-en-1-ones
摘要:
Treatment of triisopropylsilyl enol ethers with eerie ammonium nitrate/sodium azide at -20 degrees C in acetonitrile gives alpha-azido ketones in average to good yields (50-80%). Subsequent conversion of the alpha-azido ketones into 2-amino(methoxycarbonyl)cycloalk-2-en-1-ones is described.
Hypervalent Iodine Chemistry: New Oxidation Reactions Using the Iodosylbenzene−Trimethylsilyl Azide Reagent Combination. Direct α- and β-Azido Functionalization of Triisopropylsilyl Enol Ethers
作者:Philip Magnus、Jérôme Lacour、P. Andrew Evans、Michael B. Roe、Christopher Hulme
DOI:10.1021/ja953906r
日期:1996.1.1
Treatment of triisopropylsilyl (TIPS) enolethers with PhIO/TMSN3/at −18 to −15 °C rapidly (5 min) gave β-azido TIPS enolethers in high yields, with only traces of the α-azido adduct. The reaction...
Oxidative addition of azide anion to triisopropylsilyl enol ethers: synthesis of α-azido ketones.
作者:Phillip Magnus、Lisa Barth
DOI:10.1016/s0040-4039(00)78855-1
日期:1992.5
Treatment of triisopropysilyl enolethers with ceric ammonium nitrate/sodium azide at −20°C in acetonitrile gives α-azido ketones in average to good yields (50–80%).
New trialkylsilyl enol ether chemistry. Conjugate additions without the enone
作者:Philip Magnus、Jerome Lacour
DOI:10.1021/ja00036a067
日期:1992.5
Novel Approach to Lactams via (Triisopropylsilyl)azidohydrin Formation and Photoinduced Schmidt Rearrangement
作者:P. Andrew Evans、Dilip P. Modi
DOI:10.1021/jo00126a006
日期:1995.10
Applications of the β-Azidonation Reaction to Organic Synthesis. α,β-Enones, Conjugate Addition, and γ-Lactam Annulation
作者:Philip Magnus、Jérôme Lacour、P. Andrew Evans、Pascal Rigollier、Hans Tobler
DOI:10.1021/ja9829564
日期:1998.12.1
The β-azido functionalization reaction provides a mechanistically different enone synthesis that involves treatment of 2 with fluoride anion to effect desilylation and concomitant β-elimination to give 3. Table 1 lists a number of examples of the direct conversion of a TIPS enolether into the corresponding α,β-enone via a β-azido TIPS enolether. The β-azido group can be ionized with Me3Al or Me2AlCl