Synthesis of triphenylpyridines via an oxidative cyclization reaction using Sr-doped LaCoO3 perovskite as a recyclable heterogeneous catalyst
Autor: | Tien T. T. Tran, Thu N. M. Le, Minh-Vien Le, Phuc Hong Pham, Nam T. S. Phan, Tung T. Nguyen, Khang H. Trinh, Son Doan, Tien V. Huynh |
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Rok vydání: | 2019 |
Předmět: |
General Chemical Engineering
chemistry.chemical_element 02 engineering and technology General Chemistry Phenylacetic acid 010402 general chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences Combinatorial chemistry 0104 chemical sciences Catalysis law.invention Cobaltite chemistry.chemical_compound chemistry law Lanthanum Surface modification Calcination 0210 nano-technology Perovskite (structure) |
Zdroj: | RSC Advances. 9:23876-23887 |
ISSN: | 2046-2069 |
Popis: | An La0.6Sr0.4CoO3 strontium-doped lanthanum cobaltite perovskite was prepared via a gelation and calcination approach and used as a heterogeneous catalyst for the synthesis of triphenylpyridines via the cyclization reaction between ketoximes and phenylacetic acids. The transformation proceeded via the oxidative functionalization of the sp3 C–H bond in phenylacetic acid. The La0.6Sr0.4CoO3 catalyst demonstrated a superior performance to that of the pristine LaCoCO3 as well as a series of homogeneous and heterogeneous catalysts. Furthermore, the La0.6Sr0.4CoO3 catalyst was facilely recovered and reused without considerable decline in its catalytic efficiency. To the best of our knowledge, the combination of ketoximes with easily available phenylacetic acids is novel. |
Databáze: | OpenAIRE |
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