The first DMAP-mediated palladium-free Tsuji–Trost-type reaction of cyclic and acyclic Baylis–Hillman alcohols with active methylene compounds
作者:Olfa Mhasni、Farhat Rezgui
DOI:10.1016/j.tetlet.2009.11.053
日期:2010.1
Direct allylic substitution of cyclic Baylis–Hillman alcohols with active methylene compounds under modified Taber’s conditions (DMAP, toluene, reflux, 4 Å molecular sieves), with no Pd catalysts/activating agents, as is usually required for the process, affords the C-allylation products in moderate to good yields.
Et<sub>3</sub>B-mediated and palladium-catalyzed direct allylation of β-dicarbonyl compounds with Morita–Baylis–Hillman alcohols
作者:Ahlem Abidi、Yosra Oueslati、Farhat Rezgui
DOI:10.3762/bjoc.12.234
日期:——
A practical and efficient palladium-catalyzed direct allylation of beta-dicarbonylcompounds with both cyclic and acyclic Morita-Baylis-Hillman (MBH) alcohols, using Et3B as a Lewis acid promoter, is described herein. A wide range of the corresponding functionalized allylated derivatives have been obtained in good yields and with high selectivity.
The invention describes a process for reducing the amount of saturated or unsaturated monomers and oligomers during production and processing of styrenic polymers comprising a mixture of at least two components selected from the group consisting of a) phenol thioethers, b) phenol acrylates, c) 3-arylbenzofuran-2-ones and d) 1,1-di-substituted ethylenes or tri-substituted ethylenes.
STABILIZATION OF ORGANIC MATERIALS
申请人:GERSTER Michèle
公开号:US20120088869A1
公开(公告)日:2012-04-12
Organic materials which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizers at least one compound of the formula I
wherein the general symbols are as defined in claim
1
. The compounds of formula I are especially useful as stabilizers for protecting polymers and lubricants against oxidative, thermal or light-induced degradation and as scavengers for oxidized developer in color photographic material.