Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Angew Chem Int Ed Engl. 2017 Nov 20;56(47):14868-14872. doi: 10.1002/anie.201706846. Epub 2017 Sep 22.
Selective transformation of lignin into a valuable chemical is of great importance and challenge owing to its complex structure. Herein, we propose a strategy for the transformation of methoxy group (-OCH ) which is abundant in lignin into pure highly valuable chemicals. As an example to apply this strategy, a route to produce acetic acid with high selectivity by conversion of methoxy group of lignin was developed. It was demonstrated that the methoxy group in lignin could react with CO and water to generate acetic acid over RhCl in the presence of a promoter. The conversions of methoxy group in the kraft lignin and organosolv lignin reached 87.5 % and 80.4 %, respectively, and no by-product was generated. This work opens the way to produce pure chemicals using lignin as the feedstock.
由于木质素结构复杂，将其选择性转化为有价值的化学品具有重要意义和挑战。在此，我们提出了一种策略，用于将木质素中丰富的甲氧基（-OCH ）转化为纯高价值化学品。作为应用该策略的一个例子，开发了一条通过木质素甲氧基转化生产高选择性乙酸的路线。结果表明，在促进剂存在下，木质素中的甲氧基可以与 CO 和水反应，在 RhCl 的存在下生成乙酸。在 kraft 木质素和有机溶剂木质素中，甲氧基的转化率分别达到 87.5%和 80.4%，且没有生成副产物。这项工作为使用木质素作为原料生产纯化学品开辟了道路。
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