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.
Novel Catalyst System for Hydrostannation of Alkynes
作者:Sreya Gupta、Youngshil Do、Jin Hee Lee、Miryeong Lee、Junghoon Han、Young Ho Rhee、Jaiwook Park
DOI:10.1002/chem.201303057
日期:2014.1.27
A catalystsystem was developed for the highly regio‐ and stereoselective hydrostannation of a range of alkynes with tributylstannane under mild conditions. The active catalytic species was generated from a stable diruthenium complex by illuminating household fluorescent light (30 W) at room temperature.
Diverse Site-Selective Transformation of Benzylic and Allylic Silyl Ethers via Organocatalytic Oxidation
作者:Shohei Hamada、Kaori Sakamoto、Eri Miyazaki、Elghareeb E. Elboray、Yusuke Kobayashi、Takumi Furuta
DOI:10.1021/acscatal.3c01153
日期:2023.6.16
the electronic properties of silylethers, thus enabling selective oxidation of benzylic and allylic silylethers, despite steric factors. A subsequent one-pot reduction accomplishes the formal deprotection to the corresponding benzylic and allylic alcohols. This catalytic system allows the direct oxidative desymmetrization of bis-benzylic and bis-allylic silylethers to access synthetically useful
The generation of allenic zirconium intermediates by treating propargylic ether derivatives with ''Cp2Zr'' and their reactions with aldehydes in the presence of borontrifluoride etherate yield anti-beta-acetylenic alcohols along with alpha-allenic alcohols.