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Synthesis 1990; 1990(12): 1141-1143
DOI: 10.1055/s-1990-27116
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Transition Metal Catalyzed Oxidations; 4.1 Improved Method for the Oxidation of 1- and 2-Naphthols to 1,2-Napthoquinones

Karsten Krohn* , Hagen Rieger, Kai Brüggmann
  • *Institut für Organische Chemie der Technischen Universität Braunschweig, Hagenring 30, D-3300 Braunschweig, Germany
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Publication Date:
02 May 2002 (online)

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A specific oxidation of 1- and 2-naphthols to the corresponding 1,2-naphthoquinones can be achieved by slow addition of the preformed complex of the naphthols with titanium tetraisopropylate with a syringe pump to excess tert-butyl hydroperoxide (TBHP). A previously described method gave mainly coupling products from the Michael reaction.

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