期刊
RSC ADVANCES
卷 9, 期 38, 页码 21956-21963出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra04098f
关键词
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2017-04272]
- FRQNT Centre in Green Chemistry and Catalysis (CGCC) Strategic Cluster [FRQNT-2020-RS4-265155-CCVC]
- Universite Laval
- China Scholarship Council (CSC)
Iron(ii) triflate was used in combination with caffeine-derived salts as recyclable catalysts for the Diels-Alder reaction run in dimethyl carbonate (DMC) as a green solvent. The catalyst was prepared as an ionic salt from a xanthinium salt and Fe(OTf)(2). Various substrates including alpha,beta-unsaturated carbonyl and N-acyloxazolidinone derivatives were reacted with cyclopentadiene using this recyclable catalyst. The use of a low catalyst loading (1 mol%) afforded high yields (up to 99%) of the corresponding cycloadducts. The recycling and the efficiency of the catalyst were demonstrated for several runs.
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