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CHINESE JOURNAL OF CATALYSIS · 2019 · IF 4.914

Oxidative esterification of acetol with methanol to methyl pyruvate over hydroxyapatite supported gold catalyst: Essential roles of acid-base properties

Yan Wan,Congcong Zheng,Xianchi Lei,Mengqi Zhuang,Jinhan Lin,Wenda Hu,Jingdong Lin,Shaolong Wan,Yong Wang

ABSTRACT Acetol is a major light oxygenate and readily produced from staged or fast pyrolysis of lignocellulose biomass. Herein we report that acetol can be selectively converted to methyl pyruvate, an important fine chemical, through oxidative esterification over Au-based catalysts. Detailed experimental studies showed that Au on amphoteric supports with appropriate strength and balanced ratio of acid and base sites can facilitate the desired oxidative-esterification pathway without accelerating undesired aldol-condensation or Cannizzaro reactions. In particular, hydroxyapatite (with a Ca/P ratio of 1.62) supported Au achieved 87% selectivity to methyl pyruvate at an acetol conversion of 62%.

研究领域: 化学工程 · 催化科学

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TETRAHEDRON · 2024 · IF 2.1

Phosphine-catalyzed synthesis of (Z)-N-alkenyl-2-pyridones: A dual Z-diastereoselective and N-selective approach under mild conditions

Nan Wang,Yuanyuan Huang,Mengke Wang,Weichun Huang,You Zi

Herein, a new approach for the synthesis of ( Z )- N -alkenyl-2-pyridones from 2-pyridones and propiolates using phosphine catalysis under mild conditions is reported. This dual Z -diastereoselective and N -selective reaction demonstrates excellent selectivity, yielding sole ( Z )- N -alkenyl-2-pyridones. Furthermore, scale-up studies confirm its practical applicability, with consistent efficiencies observed.

研究领域: 有机化学 · 合成化学

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Oxidative esterification of acetol with methanol to methyl pyruvate over hydroxyapatite supported gold catalyst: Essential roles of acid-base properties

Phosphine-catalyzed synthesis of (Z)-N-alkenyl-2-pyridones: A dual Z-diastereoselective and N-selective approach under mild conditions