Transition metal- and photoredox-catalyzed valorisation of lignin subunits,Green Chemistry

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Transition metal- and photoredox-catalyzed valorisation of lignin subunits
Green Chemistry ( IF 9.3 ) Pub Date : 2018-10-04 , DOI: 10.1039/c8gc02073f
Amrita Das _{1,

2,

3,

4} , Burkhard König _{1,

2,

3,

4}

Affiliation

Lignin is a valuable source for chemicals, particularly phenols, and has the potential to serve as a raw material for fuels. Since lignin is a very complex molecule, it is very challenging to cleave bonds in lignin selectively yielding value-added chemicals. Over the years, several methods have been developed for lignin valorisation, e.g., pyrolysis, gasification, hydrolysis, hydrogenolysis, chemical oxidation etc. There has also been much advancement towards lignin valorisation by bioengineering and biorefining. In recent years, visible light photoredox catalysis has emerged as a powerful tool for construction and deconstruction of bonds. In this short review, we discuss three types of lignin depolymerisation methods, reductive, oxidative and redox neutral reactions, and compare the use of transition metal catalysis and photoredox catalysis in the transformations. We discuss the advantages and disadvantages of the two approaches.

中文翻译：

过渡金属和光氧化还原催化的木质素亚基的增值

木质素是化学品（尤其是酚）的宝贵来源，并有潜力用作燃料的原料。由于木质素是一个非常复杂的分子，因此在木质素中裂解键选择性地产生增值化学品是非常具有挑战性的。多年来，已经开发了几种用于木质素增价的方法，例如热解，气化，水解，氢解，化学氧化等。。通过生物工程和生物精制，木质素价格也有了很大的进步。近年来，可见光光氧化还原催化已经成为一种用于键的构建和解构的强大工具。在这篇简短的评论中，我们讨论了三种类型的木质素解聚方法：还原，氧化和氧化还原中性反应，并比较了过渡金属催化和光氧化还原催化在转化中的用途。我们讨论了两种方法的优缺点。

更新日期：2018-10-30

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