Ecological Recycling of a Bio-Based Catalyst for Cu Click Reaction: a New Strategy for a Greener Sustainable Catalysis

Abstract

We report the elaboration of novel bio-sourced ecocatalysts for the Cu catalyzed azide-alkyne cycloaddition reaction (CuAAC). Ecocatalysis is based on the recycling of metals issued from rhizofiltration of metal rich effluents, and an innovative chemical valorization of the subsequent biomass in the field of catalysis. Taking advantage of the remarkable ability of Eichhornia crassipes to accumulate Cu(II) into its roots, these can be directly used for the preparation of copper containing ecocatalysts, called EcoCu, which appear as highly active catalysts in the CuAAC reaction. Furthermore, the recycling of Cu from the reaction mixture via E. crassipes is carried out ecologically. The resulting EcoCu 2 material displays reusability for the CuAAC reaction under identical experimental conditions without a loss of its catalytic activity.

From Conventional Lewis Acids to Heterogeneous Montmorillonite K10: Eco‐Friendly Plant‐Based Catalysts Used as Green Lewis Acids

“…The yellow solution is concentrated under vacuum then filtered through a pad of Celite if a purification step is necessary. The resulting solid residue, stored in a desiccator, may be used as an ecocatalyst or may be supported on silica or MK10 …”

Eco‐Mn Ecocatalysts: Toolbox for Sustainable and Green Lewis Acid Catalysis and Oxidation Reactions

“…The concept of ecocatalysis has allowed the preparation of a wide range of ecological catalysts: the ecocatalysts . Ecocatalysts present a flexible reactivity, while respecting the principles of Green chemistry.…”

“…[20][21][22] The concept of ecocatalysis has allowed the preparation of a wide range of ecological catalysts: the ecocatalysts. [23][24][25][26][27] Ecocatalysts present a flexible reactivity, while respecting the principles of Green chemistry. Ecocatalysts can be used as heterogeneous catalysts in synthetic transformations allowing access to molecules with a high added-value for the production of fine chemicals and in scalable processes.…”

Académie des Sciences Prizes/Novartis Chemistry Lectureship 2016–2017/Welch Award in Chemistry

“…Grison's research interests include the transformation of plant‐derived noble and transition metals to polymetallic catalytic materials for organic synthesis. She has reported in ChemSusChem on biosourced polymetallic catalysts, and in ChemistrySelect on biosourced catalysts for the copper‐catalyzed azide–alkyne cycloaddition reaction …”