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• W4288045894 endingPage "105696" @default.
• W4288045894 startingPage "105696" @default.
• W4288045894 abstract "Hot compressed solvents (alcohol, water) have been widely used in the production of value-added chemicals from biomass due to their sufficiently low viscosity, high diffusivity, and environmentally-benign features. Anethole (AN) is a unique kind of natural aromatic compound, while its green synthesis method still requires to be explored. Herein, a novel porous acid-base bifunctional phytic acid (PA)-hafnium (Hf)(1:2.5) catalyst was prepared by a simple assembly of PA with Hf under a one-pot hydrothermal method (120 °C, 24 h). The PA-Hf(1: 2.5) possessed outstanding catalytic activity for the synthesis of AN from 4’-methoxypropiophenone (4-MOPP) at 220 °C and 15 bar in 2-pentanol (4-MOPP conversion: 99.8%, AN yield: 98.8%), which can be ascribed to its moderate surface area (95.3 m2/g), pore volume (0.18 cm3/g), mesopores (4.0 nm), and acid-base couple sites (density: 3.6 vs 1.7 mmol/g). 2-Pentanol was determined to serve as the superior hydrogen donor and solvent for the overall conversion process, which can remarkably hinder side reactions in this hot-compressed medium. Moreover, the cooperative interaction of Lewis acid-base couple sites (Hf4+-O2−) and Brønsted acidic species (-OH) of PA-Hf(1:2.5) led to its excellent catalytic performance. PA-Hf(1:2.5) was highly reusable with constant activity after five reaction cycles." @default.
• W4288045894 created "2022-07-27" @default.
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• W4288045894 date "2022-10-01" @default.
• W4288045894 modified "2023-09-28" @default.
• W4288045894 title "Cascade upgrading of bio-based 4’-methoxypropiophenone to anethole enabled by hot-compressed alcohol over a Hf-phytic acid coordination catalyst" @default.
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• W4288045894 doi "https://doi.org/10.1016/j.supflu.2022.105696" @default.
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