期刊
SYNLETT
卷 24, 期 8, 页码 981-986出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0032-1316896
关键词
alkynes; carbonylation; heterogeneous catalysis; palladium; alcohols
资金
- Council of Scientific and Industrial Research, New Delhi
Pd/C-catalyzed oxidative alkoxycarbonylation of terminal alkynes using alcohols in the presence of tetrabutylammonium iodide under CO/O-2 (5:1 atm) has been investigated. The desired alpha,beta-alkynyl esters and unsymmetrical maleate esters are formed in good to excellent yields under different reaction conditions. The present protocol eliminates the use of phosphine ligands and has straightforward catalyst recovery. The catalyst was recycled up to six times without significant loss of catalytic activity.
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