A new regioselective synthesis of 3-substituted furan-2(5H)-ones by palladium-catalysed reductive carbonylation of alk-1-ynes
作者:Bartolo Gabriele、Giuseppe Salerno、Mirco Costa、Gian Paolo Chiusoli
DOI:10.1016/s0040-4039(98)02464-2
日期:1999.1
or 3-aryl-substituted furan-2(5H)-ones are obtained directly in fair yields by reductive carbonylation of alk-1-ynes in the presence of catalytic amounts of palladium iodide in conjunction with potassium iodide (10 eq.) and water (200 eq.). Simultaneous oxidation of CO to CO2 accounts for the stoichiometry of the process. Reactions are carried out in dioxane under mild conditions (80 °C and 10 atm of
Palladium-catalysed formation of maleic anhydrides from CO, CO2 and alk-1-ynes
作者:Bartolo Gabriele、Giuseppe Salerno、Mirco Costa、Gian Paolo Chiusoli
DOI:10.1039/a902814e
日期:——
Carbon dioxide causes palladium-catalysed synthesis of unsaturated γ-lactones from alk-1-ynes and CO to shift towards maleic anhydrides.
二氧化碳促使钯催化下不饱和γ-内酯从炔-1-烃和CO向马来酐转变。
[EN] IMPROVEMENTS IN OR RELATING TO CURATIVES<br/>[FR] AMÉLIORATIONS APPORTÉES OU SE RAPPORTANT À DES AGENTS DE DURCISSEMENT
申请人:HEXCEL COMPOSITES LTD
公开号:WO2020216688A1
公开(公告)日:2020-10-29
The host compound in a clathrate is an amino or hydroxyl containing aromatic phosphorous compound, clathrates containing a resin curative and their use in curable resin compositions to produce moulded articles particularly fibre reinforced articles.
Synthesis of Maleic Anhydrides and Maleic Acids by Pd-Catalyzed Oxidative Dicarbonylation of Alk-1-ynes
作者:Bartolo Gabriele、Lucia Veltri、Giuseppe Salerno、Mirco Costa、Gian Paolo Chiusoli
DOI:10.1002/ejoc.200210706
日期:2003.5
effectively promotes the Pd-catalyzedoxidative carbonylation of terminal alkynes to give maleicanhydrides in fair yields. Reactions were carried out in aqueous dioxane at 60−80 °C in the presence of catalytic amounts of PdI2 in conjunction with KI and under a 4:1:10 mixture of CO/air/CO2 (60 atm total pressure at 25 °C). By working in the presence of a large excess of water, maleicacids were formed selectively
Starting from citraconic anhydride, a three-step approach to fimbrolide congener is reported by taking the advantage of a regioselective Grignard reaction with an anhydride, followed by a dehydrative cyclization and double bromination-dehydrobromination sequence. Starting from N-(4-tolyl)maleimide, an eight-step synthesis of two natural fimbrolides is reported with good yields via the synthesis of requisite butylmaleic anhydride, its regioselective Grignard coupling reaction, and a bromination-dehydrobromination pathway.