The alkylation of alcohols and polyols has been investigated with alkylphosphates in the presence of a Lewis or Brønsted acid catalyst. The permethylation of polyols was developed under solvent‐free conditions at 100 °C with either iron triflate or Aquivion PW98, affording the isolated products in yields between 52 and 95 %. The methodology was also adjusted to carry out peralkylation with longer alkyl
A Convenient Catalytic Method for the Synthesis of Ethers from Alcohols and Carbonyl Compounds
作者:Yasuyuki Fujii、Hisakazu Furugaki、Eiko Tamura、Shinji Yano、Katsumi Kita
DOI:10.1246/bcsj.78.456
日期:2005.3
Dialkyl ethers and alkyl fluoroalkyl ethers are obtained in excellent yields by the reaction of alcohols and carbonyl compounds in the presence of Pd/C under the atmospheric pressure of hydrogen, w...
二烷基醚和烷基氟烷基醚是由醇和羰基化合物在Pd/C存在下,在氢气、W...
Continuous-Flow Reductive Alkylation: Synthesis of Bio-based Symmetrical and Disymmetrical Ethers
作者:Christophe Len、Sophie Bruniaux、Denis Luart
DOI:10.1055/s-0036-1591861
日期:2018.5
materials). For the first time, a reductive alkylation process in continuous flow has been elaborated for the conversion of bio-based alcohols and aldehydes into symmetrical and dissymmetrical high-value-added ethers for industrial companies. The developed method is an etherification associating liquid, solid and gasphases under green conditions (continuous flow, catalysis, bio-based starting materials)
Mild and efficient capture and functionalisation of CO2 using silver(i) oxide and application to 13C-labelled dialkyl carbonates
作者:Gemma A. Tunbridge、Riccardo Baruchello、Lorenzo Caggiano
DOI:10.1039/c3ra23281f
日期:——
A high yielding three-component reaction between β-iodo ethylamine derivatives, MeOH and gaseous CO2 at ambient temperatures and pressures is reported using silver(I) oxide. Unfunctionalised alkyl iodides were also found to be effective in this transformation and their optimisation is also described. To highlight the ease and control with which gaseous CO2 can be captured and functionalised under mild conditions, the reaction was performed using 13C-enriched CO2 to afford specifically 13C-carbonyl-labelled dialkyl carbonates with exquisite control of the isotopic purity in good yields and without the need for specialised equipment.
Catalytic Reductive Etherification of Ketones with Alcohols at Ambient Hydrogen Pressure: A Practical, Waste-Minimized Synthesis of Dialkyl Ethers
作者:Lukas Gooßen、Christophe Linder
DOI:10.1055/s-2006-956484
日期:2006.12
A heterogeneous platinum catalyst was found to efficiently mediate the reductive etherification of ketones at ambient hydrogen pressure. In this environmentally benign transformation, water is released as the only by-product, and this is trapped with molecular sieves. The preparative utility of the new reaction protocol is demonstrated by the synthesis of ten unsymmetrical ethers from the corresponding ketones and primary or secondary alcohols.