1. Application of Raw and Chemically Modified Biomasses for Heterogeneous Cu-Catalysed Conversion of Aryl boronic Acids to Phenols Derivatives.
- Author
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Torres, Fernanda Guimarães, Teodoro, Filipe Simões, Gurgel, Leandro Vinícius Alves, Bourdreux, Flavien, Zayene, Olfa, Gaucher, Anne, Gil, Laurent Frédéric, and Prim, Damien
- Subjects
BORONIC acid derivatives ,PHENOL derivatives ,BORONIC acids ,CELLULOSE - Abstract
This work describes the application of raw and chemically modified cellulose and sugarcane bagasse for ipso-hydroxylation of aryl boronic acids in environmentally friendly reaction conditions. The catalytic efficiency of five support-[Cu] materials was compared in forming phenols from aryl boronic acids. Our investigation highlights that the CEDA-[Cu] material (6-deoxy-6-aminoethyleneamino cellulose loaded with Cu) leads to the best results under very mild reaction conditions. The optimized catalytic sequence, allowing a facile transformation of boronic acids to phenols, required the mandatory and joint presence of the support, Cu
2 O, and KOH at room temperature. CEDA-[Cu] was characterized using13 C solid-state NMR, ICP, and FTIR. The use of CEDA-[Cu] accounts for the efficacious synthesis of variously substituted phenol derivatives and presents very good recyclability after five catalytic cycles. [ABSTRACT FROM AUTHOR]- Published
- 2022
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