When substituted 2,3-norbornylhydroquinone is treated with CAN with or without water, an unusual fragmentation-aromatization reaction occurs which leads to a substituted 1,4-naphthoquinone instead of the desired substituted 2,3-norbornylbenzoquinone. (C) 2008 Elsevier Ltd. All rights reserved.
When substituted 2,3-norbornylhydroquinone is treated with CAN with or without water, an unusual fragmentation-aromatization reaction occurs which leads to a substituted 1,4-naphthoquinone instead of the desired substituted 2,3-norbornylbenzoquinone. (C) 2008 Elsevier Ltd. All rights reserved.
5-Phenyl-1,2,3,4-tetrachloro-7,7-dimethoxynotbornadiene (II) may be smoothly cleaved along two pathways at 130°. Methyl 5-phenyl-2,3,4-trichlorobenzoate (VI) and methylchloride are obtained on the one hand, on the other hand result 2,3,4,5-tetrachlorobiphenyl (III) and dimethoxycarbene (XI). The latter may be trapped with methanol yielding methyl ortho-formate or with sulfur giving methyl thionocarbonate