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-catalyzed oxidative carbonylation of terminal alkynes to give maleic anhydrides 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, maleic acids were formed selectively
我们发现二氧化碳有效地促进了钯催化的末端炔烃的氧化羰基化,从而以合理的产率得到马来酸酐。反应在二恶烷水溶液中在 60-80 °C 下进行,存在催化量的 PdI2 和 KI,并在 CO/空气/CO2 的 4:1:10 混合物(25 °C 下总压为 60 个大气压)下进行. 通过在大量过量的水存在下工作,选择性地形成马来酸,这种反应具有前所未有的催化效率。在后一种情况下,使用过量的二氧化碳往往会抑制而不是促进反应。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)