A Photochemical Strategy for Lignin Degradation at Room Temperature

作者：Nguyen, John D.; Matsuura, Bryan S.; Stephenson, Corey R. J.^*

来源：Journal of the American Chemical Society, 2014, 136(4): 1218-1221.

DOI：10.1021/ja4113462

• O BOND-CLEAVAGE
• LIGHT PHOTOREDOX CATALYSIS
• WATER-INSOLUBLE FRACTION
• ELECTRON-TRANSFER
• C-C
• MODEL COMPOUNDS
• AEROBIC OXIDATION
• PYROLYTIC LIGNIN
• SINGLE-LAYER
• HYDROGENOLYSIS

The development of a room-temperature lignin degradation strategy consisting of a chemoselective benzylic oxidation with a recyclable oxidant ([4-AcNH-TEMPO]BF4) and a catalytic reductive C-O bond cleavage utilizing the photocatalyst [Ir(ppy)(2)(dtbbpy)]PF6 is described. This system was tested on relevant lignin model substrates containing beta-O-4 linkages to generate fragmentation products in good to excellent yields.

• 出版日期2014-1-29