Chemoselective metal-free aerobic alcohol oxidation in lignin.

نویسندگان

  • Alireza Rahimi
  • Ali Azarpira
  • Hoon Kim
  • John Ralph
  • Shannon S Stahl
چکیده

An efficient organocatalytic method for chemoselective aerobic oxidation of secondary benzylic alcohols within lignin model compounds has been identified. Extension to selective oxidation in natural lignins has also been demonstrated. The optimal catalyst system consists of 4-acetamido-TEMPO (5 mol %; TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) in combination with HNO3 and HCl (10 mol % each). Preliminary studies highlight the prospect of combining this method with a subsequent oxidation step to achieve C-C bond cleavage.

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عنوان ژورنال:
  • Journal of the American Chemical Society

دوره 135 17  شماره 

صفحات  -

تاریخ انتشار 2013