4.8 Article

Biosourced Polymetallic Catalysts: An Efficient Means To Synthesize Underexploited Platform Molecules from Carbohydrates

期刊

CHEMSUSCHEM
卷 7, 期 7, 页码 1915-1923

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201400078

关键词

biomass; carbohydrates; green chemistry; plant-based catalysis; waste reuse

资金

  1. Agence Nationale de la Recherche (ANR) [11ECOT 011 01]
  2. Agence de l'Environnement et de la Maitrise de l'Energie (ADEME)
  3. Fond Europeen de Developpement Regional (FEDER) programs

向作者/读者索取更多资源

Polymetallic hyperaccumulating plants growing on wastes from former mining activity were used as the starting material in the preparation of novel plant-based Lewis acid catalysts. The preparation of biosourced Lewis acid catalysts is a new way to make use of mining wastes. These catalysts were characterized by X-ray fluorescence, X-ray diffraction, inductively coupled plasma mass spectrometry, and direct infusion electrospray ionization mass spectrometry. These analyses revealed a complex composition of metal species, present mainly as polymetallic chlorides. The catalysts proved to be efficient and recyclable in a solid-state version of the Garcia Gonzalez reaction, which has been underexploited until now in efforts to use carbohydrates from biomass. This methodology was extended to various carbohydrates to obtain the corresponding polyhydroxyalkyl furans in 38-98% yield. These plant-based catalysts may be a better alternative to classical Lewis acid catalysts that were previously used for the Garcia Gonzalez reaction, such as ZnCl2, FeCl3, and CeCl3, which are often unrecyclable, require aqueous treatments, or rely on metals, the current known reserves of which will be consumed in the coming decades. Moreover, the plant-based catalysts allowed novel control of the Garcia Gonzalez reaction, as two different products were obtained depending on the reaction conditions.

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