One-pot production of phenazine from lignin-derived catechol

Abstract

Upgrading lignin-derived monomeric products is crucial in bio-refinery to effectively utilize lignin. Herein, we report a simple strategy to convert catechol to phenazine, a useful N-heterocycle three-aromatic-ring compound, whose current...

Integrated design of an amination process of lignin oxygenated model compounds to synthesize cyclohexylamine: catalyst nanostructure engineering and catalytic conditional strategy

“…It is worth noting that the suitable temperature ranges for these two processes are not the same. Therefore, the one-pot-two-step system proposed by Yan et al 133 is worthy of admiration. That is, according to the characteristics of the reaction, the reaction temperature of the first step is set to be beneficial for the formation of the intermediate to the greatest extent, and the temperature of the second step is set according to the appropriate temperature of the amination reaction.…”

Production of Oximes Directly from Sustainable Lignocellulose‐Derived Aldehydes and Ammonia over HTS‐1 Catalyst

“…[8] For such transformation where most studies used still model compounds of lignin. [9][10][11][12] It was necessary to develop superior and more sustainable synthetic routes to prepare N-substitute aromatic compounds, even from raw biomass. Zhang and co-workers demonstrated that a small amount of benzylamine could be obtained from organic poplar lignin containing βÀ OÀ 4 bond through a two-step process.…”

Sustainable Production of Bioactive Molecules from C‐Lignin‐Derived Propenylcatechol

“…[31] To the best of our knowledge, this is the only existing sample for downstream transformation of C-lignin biopolymers, despite the fact that several conversion protocols for pyrocatechol, a potential secondary product from C-lignin, have been proposed and/or practiced. [32][33][34] We recently reported the hydrogenolysis of C-lignin from castor seed coats over an atomically dispersed Ru catalyst (Ru/ ZnO/C), in which a unique propenylcatechol 1 was generated at a high yield with turnover numbers of up to 345 mol catechols mol Ru À 1 . [28] Given that a catechyl unit is often present in pharmaceuticals and bioactive molecules, and the propenyl end-chain can be diversely functionalized, [35,36] we reasoned that propenylcatechol could serve as a promising platform molecule for the preparation of complex bioactive molecules.…”

“…Very recently, Anastas and Darcel reported that four catechol monomers generated from Cu‐PMO‐catalyzed hydrogenolysis of C‐lignin can be converted into muconolactone derivatives through oxidative C−C cleavage over the (NH 4 ) 2 Fe(SO 4 ) 2 ⋅ 6H 2 O catalyst [31] . To the best of our knowledge, this is the only existing sample for downstream transformation of C‐lignin biopolymers, despite the fact that several conversion protocols for pyrocatechol, a potential secondary product from C‐lignin, have been proposed and/or practiced [32–34] …”