A Convenient and Versatile Method for the Preparation of α-Hydroxymethyl Ketone Derivatives from the Corresponding Allyl Silyl Ethers or Allyl Carboxylates
作者:Yung-Son Hon、Ying-Chieh Wong、Kuo-Jui Wu
DOI:10.1002/jccs.200800134
日期:2008.8
The ozonolysis of 1-substituted allyl silyl ethers or 1-substituted allyl carboxylates followed by treatment with bases gave the corresponding α-silyloxymethyl- or a-acyloxymethyl-ketones in good yields. It is proposed to proceed via the corresponding α-silyloxy- or α-acyloxyaldehydes intermediates followed by 1,4-group migration. The results of theoretical calculations are applicable to explain the
Reactions and characterization of allylic and related zirconium reagents (allenic and γ-alkoxyallylic zirconiums) generated by treatment of allylic and/or propargylic ethers with a zirconocene-butene complex (“Cp2Zr”) are described.
Preparation and regio- and diastereoselective reactions of allylic zirconium reagents from allylic ether derivatives
作者:Hisanaka Ito、Takeo Taguchi、Yuji Hanzawa
DOI:10.1016/s0040-4039(00)91605-8
日期:1992.3
Allylic zirconium reagents were generated by treating allylic ether derivatives with zirconocene “Cp2Zr”. The allylic zirconium reagents reacted with aldehydes in highly regio- and diastereoselective manner to give homoallylicalcohol compounds.
Reduction of .DELTA.2-isoxazolines. 3. Raney nickel catalyzed formation of .beta.-hydroxy ketones
作者:Dennis P. Curran
DOI:10.1021/ja00356a021
日期:1983.9
On determine les conditions optimales de transformation d'isoxazolines-2 en β-hydroxycetones en utilisant un catalyseur Ni de Raney, l'acide borique, un melange 5/1 methanol/eau et l'hydrogene gazeux
确定最佳条件转化 d'isoxazolines-2 en β-hydroxycetones en utilisant un catalyseur Ni de Raney, l'acide borique, un melange 5/1 甲醇/eau et l'hydrogene Gazeux
Catalytic<i>Z</i>-Selective Cross-Metathesis with Secondary Silyl- and Benzyl-Protected Allylic Ethers: Mechanistic Aspects and Applications to Natural Product Synthesis
作者:Tyler J. Mann、Alexander W. H. Speed、Richard R. Schrock、Amir H. Hoveyda
DOI:10.1002/anie.201302538
日期:2013.8.5
Get me a Z (olefin): Efficient catalytic cross‐metathesis reactions that afford Z‐disubstituted allylic silyl or benzyl ethers are reported (see scheme, MAP=monoalkoxide pyrrolide). The approach, in combination with catalytic cross‐coupling, provides a general entry to otherwise difficult‐to‐access alkyne‐containing Z olefins.
给我一个 Z (烯烃):报告了提供Z-二取代烯丙基甲硅烷基或苄基醚的高效催化交叉复分解反应(参见方案,MAP=单烷氧基吡咯化物)。该方法与催化交叉偶联相结合,为其他难以获得的含炔烃Z 烯烃提供了通用入口。