Ultraviolet irradiation of nonaqueous solutions of tetra-O-methylpurpurogallin leads to two new rearrangements. In absolute ethanol the sole isolated product was 1-hydroxy-6,7,8-trimethoxynaphthalene, in a variety of aprotic solvents the naphthol was accompanied by a tricyclic ketone of novel structure.
E. J. Forbes, J. Griffiths and R. A. Ripley, J. Chem. Soc. C, 1968, 1149 DOI: 10.1039/J39680001149
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