Renewable camphor-derived hydroperoxide: synthesis and use in the asymmetric epoxidation of allylic alcoholsElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b3/b303904h/
Renewable enantiopure tertiary furyl hydroperoxide has been easily synthesized in two steps starting from low cost (+)-(1R)-camphor and it has been used in the asymmetric epoxidation and kinetic resolution of allylic alcohols (enantioselectivities up to 46%).
Novel amine-modified TiO2–SiO2 aerogel for the demanding epoxidation of substituted cyclohexenols
作者:Marco Dusi、Christian A. Müller、Tamas Mallat、Alfons Baiker
DOI:10.1039/a808374f
日期:——
Amine additives provided high selectivity (up to 98%) in the epoxidation of sensitive alkyl-substituted cyclohexenols with a TiO2âSiO2 aerogel and ButOOH; heterogenization of the catalyst system resulted in a new bifunctional catalyst.
Harnessing bimetallic oxide nanoparticles on ionic liquid functionalized silica for enhanced catalytic performance
作者:Rithik Parmar、Pratikkumar Lakhani、Dhavalkumar Bhanderi、Sanjeev Kane、U.K. Goutam、Chetan K. Modi
DOI:10.1016/j.jorganchem.2024.123073
日期:2024.3
The present study reports on harnessingbimetallic (V and Ni) oxidenanoparticles supported on ionic liquid-functionalized silica for enhancingcatalyticperformance in epoxidation and hydrogenation reactions. The as-synthesized catalyst was ably characterized through various techniques such as FTIR, X-ray diffraction (XRD), N adsorption−desorption isotherms, X-ray photoelectron spectroscopy (XPS)
Regio- and Diastereoselective Catalytic Epoxidation of Chiral Allylic Alcohols with Hexafluoroacetone Perhydrate. Hydroxy-Group Directivity through Hydrogen Bonding
作者:Waldemar Adam、Hans-Georg Degen、Chantu R. Saha-Möller
DOI:10.1021/jo982025a
日期:1999.2.1
The threo diastereoselectivity in the catalytic-epoxidation of chiral allylic alcohols with 1,3-allylic strain by hexafluoroacetone perhydrate and its regioselectivity in the epoxidation of 1-methylgeraniol establishes a hydroxy-directing effect through hydrogen bonding between the oxidant and substrate. The higher syn selectivity for the cis than trans isomer of 5-tert-butylcyclohexen-3-ol suggests a hydrogen-bonded transition-state structure similar to that of peracids for this catalytic oxygen-transfer process.