Continuous flow chemistry: a discovery tool for new chemical reactivity patterns
作者:Jan Hartwig、Jan B. Metternich、Nikzad Nikbin、Andreas Kirschning、Steven V. Ley
DOI:10.1039/c4ob00662c
日期:——
Continuous flow chemistry as a process intensification tool is well known. However, its ability to enable chemists to perform reactions which are not possible in batch is less well studied or understood. Here we present an example, where a new reactivitypattern and extended reaction scope has been achieved by transferring a reaction from batch mode to flow. This new reactivity can be explained by
The invention provides epoxy and oxetane compositions including the novel acyloxy and N-acyl curing agents described herein. Use of invention curing agents result in cured adhesive compositions with remarkably increased adhesion and reduced hydrophilicity when compared to resins cured with other types of curing agents. Furthermore, the curatives of this invention do not interfere with free-radical cure and are thus suited for use in hybrid cure thermoset compositions.
A General Continuous Flow Method for Palladium Catalysed Carbonylation Reactions Using Single and Multiple Tube-in-Tube Gas-Liquid Microreactors
作者:Ulrike Gross、Peter Koos、Matthew O'Brien、Anastasios Polyzos、Steven V. Ley
DOI:10.1002/ejoc.201402804
日期:2014.10
with segmentedflowgas-liquid reactors. As the volume of pressurised gas contained within the device is low, the hazards associated with this are potentially mitigated relative to comparable batch processes. We also show how the incorporation of a second in-line gas-flow reactor allows for the sequential introduction of two gases (carbon monoxide and a gaseous nucleophile) into the reaction stream
Synthesis of α,β-unsaturated esters of perfluoropolyalkylethers (PFPAEs) based on hexafluoropropylene oxide units for photopolymerization
作者:Céline Bonneaud、Mélanie Decostanzi、Julia Burgess、Giuseppe Trusiano、Trevor Burgess、Roberta Bongiovanni、Christine Joly-Duhamel、Chadron M. Friesen
DOI:10.1039/c8ra06354k
日期:——
the addition of maleate (cis-configuration) to a fluorinated moiety is challenging due to its potential isomerization during esterification. Various synthetic routes were attempted and led to very low conversion or side-products. The immiscibility of both reagents combined with an easy isomerization or attack on the double bond were potential explanations. In this paper, the synthesis of maleates ol
Stereoselective formation of malefic acid diester from two diazo acetic acid esters on a Raney nickel surface. Evidence for dipod-chemisorbed carbenes
作者:Hans Bock、Hans Peter Wolf
DOI:10.1039/c39900000690
日期:——
The N2 elimination fromdiazoaceticacidesters, heterogeneously catalysed by RaneyNickel, yields as chemidesorbed main product up to 93% maleficaciddiester, cis-stereoselectivity is observed and additional methyl/ethyl ester crossing experiments provide evidence for dipod-chemisorbedsurfacecarbene intermediates.