La redaction de衍生 de cyclohexene-1yl trimethylsilyl ether avec deselectrophiles donne des衍生 de trimethylsiloxy-2 cyclohexene-2 one (ou ol ou carboxamide)
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...
New trialkylsilyl enol ether chemistry: α-N-tosylamination of triisopropylsilyl enol ethers
作者:Philip Magnus、Jérôme Lacour、Iain Coldham、Benjamin Mugrage、William B. Bauta
DOI:10.1016/0040-4020(95)00696-6
日期:1995.10
Triisopropylsilyl enolethers reaet with (TsN)2Se to give α-N-tosylamino derivatives in modest to good yields. In the absence of 1,3-diaxial interactions the N-tosylamino group prefers an axial conformation. The axial N-tosylamino derivatives can be readily transformed into the azabicyclo[3.3.1]nonane skeleton, the core structure of a number of alkaloids.
Pd(OH)<sub>2</sub>/C-Mediated Selective Oxidation of Silyl Enol Ethers by <i>tert</i>-Butylhydroperoxide, a Useful Method for the Conversion of Ketones to α,β-Enones or β-Silyloxy-α,β-enones
作者:Jin-Quan Yu、Hai-Chen Wu、E. J. Corey
DOI:10.1021/ol050284y
日期:2005.3.1
[reaction: see text] Pd(OH)2-catalyzed oxidation of silyl enol ethers by t-BuOOH gives either beta-silyloxy-alpha,beta-enones or alpha,beta-enones in good yields depending on the base used.
For a series of 6-(4-methylphenylsulphonyl)amino-1-triisopropylsilyl(oxy)-cyclohexenes the preferred conformation, in the solid state, has the –NHTs (Ts = 4-methylphenylsulphonyl) group in an axial orientation; if the axial-NHTs group experiences a 1,3-diaxial interaction with a methyl group, the equatorial conformation becomes the thermodynamically more stable form.