期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 26, 页码 14405-14409出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202102353
关键词
biomass conversion; N-heterocycle; sustainable chemistry; tandem catalysis; zeolites
资金
- National Key Research and Development Program of China [2017YFA0403103, 2017YFA0403003]
- National Natural Science Foundation of China [21871277, 21403248, 22003069]
- Beijing Municipal Science & Technology Commission [Z191100007219009]
- Chinese Academy of Sciences [QYZDY-SSW-SLH013]
A new approach for synthesizing Piperidine and delta-Lactam from lignocellulosic biomass with high yield was demonstrated in this study. By using Ru catalysts supported on beta zeolite in a tandem reaction, 2-methyl piperidine and 6-methylpiperidin-2-one were successfully synthesized from glucose.
Piperidine and delta-Lactam chemicals have wide application, which are currently produced from fossil resource in industry. Production of this kind of chemicals from lignocellulosic biomass is of great importance, but is challenging and the reported routes give low yield. Herein, we demonstrate the strategy to synthesize 2-methyl piperidine (MP) and 6-methylpiperidin-2-one (MPO) from biomass-derived triacetic acid lactone (TAL) that is produced microbially from glucose. In this route, TAL was firstly converted into 4-hydroxy-6-methylpyridin-2(1H)-one (HMPO) through facile aminolysis, subsequently HMPO was selectively transformed into MP or MPO over Ru catalysts supported on beta zeolite (Ru/BEA-X, X is the molar ratio of Si to Al) via the tandem reaction. It was found that the yield of MP could reach 76.5 % over Ru/BEA-60 in t-BuOH, and the yield of MPO could be 78.5 % in dioxane. Systematic studies reveal that the excellent catalytic performance of Ru/BEA-60 was closely correlated with the cooperative effects between active metal and acidic zeolite with large pore geometries. The related reaction pathway was studied on the basis of control experiments.
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