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.
A Catalytic Intermolecular Formal Ene Reaction between Ketone-Derived Silyl Enol Ethers and Alkynes
作者:Stephen D. Holmbo、Nicole A. Godfrey、Joshua J. Hirner、Sergey V. Pronin
DOI:10.1021/jacs.6b06847
日期:2016.9.28
A catalytic formal ene reaction between ketone-derived silylenolethers and terminal alkynes is described. This transformation is uniquely capable of bimolecular assembly of 2-siloxy-1,4-dienes and can be used to access β,γ-unsaturated ketones containing quaternary carbons in the α-position.
Re(I)-Catalyzed Hydropropargylation of Silyl Enol Ethers Utilizing Dynamic Interconversion of Vinylidene–Alkenylmetal Intermediates via 1,5-Hydride Transfer
Re(I)-catalyzed hydropropargylation reaction of silyl enol ethers was realized utilizing dynamic interconversion of vinylidene-alkenylmetal intermediates, where alkenylmetals underwent 1,5-hydridetransfer of the α-hydrogen to generate vinylidene intermediates. Furthermore, this process was found to be in an equilibrium.
A Facile Method for the Synthesis of Highly Substituted Six-Membered Rings: Mukaiyama−Aldol−Prins Cascade Reaction
作者:Hao Li、Teck-Peng Loh
DOI:10.1021/ol100937r
日期:2010.6.18
A highly efficient cascade reaction has been developed using cheap commercially available or easily accessible starting materials. It has the ability to construct highly functionalized six-membered ring with three to four stereogenic centers in high yields.