Catalytic C-O bond cleavage of 2-aryloxy-1-arylethanols and its application to the depolymerization of lignin-related polymers.

Catalytic C-O bond cleavage of 2-aryloxy-1-arylethanols and its application to the depolymerization of lignin-related polymers.
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DOI:
10.1021/ja106101f
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发表时间:
2010-09-15
影响因子:
15
通讯作者:
Ellman, Jonathan A.
Ellman, Jonathan A.
中科院分区:
化学1区
文献类型:
--
作者:
Nichols, Jason M.;Bishop, Lee M.;Bergman, Robert G.;Ellman, Jonathan A.

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研究了一种2-芳氧基-1-芳基乙醇的氧化还原中性C-O键裂解反应,得到裂解产物,分离产率为62-98%。该反应适用于破坏木质素相关聚合物中发现的关键醚键。通过串联脱氢/还原性醚裂解进行键转化。初步的机理研究表明,醚裂解是最有可能的有机金属C-O活化。木质素相关聚合物的催化解聚定量地产生相应的单体而不添加试剂。
A ruthenium-catalyzed, redox neutral C-O bond cleavage of 2-aryloxy-1-arylethanols was developed that yields cleavage products in 62-98% isolated yield. This reaction is applicable to breaking the key ethereal bond found in lignin-related polymers. The bond transformation proceeds by a tandem dehydrogenation/reductive ether cleavage. Initial mechanistic investigations indicate that the ether cleavage is most likely an organometallic C-O activation. A catalytic depolymerization of a lignin-related polymer quantitatively yields the corresponding monomer with no added reagent.
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