Abstract
The alkyl group in 7-alkyl-5, 8-dihydroxy-α-tetralone was extended from C2 to C10 and their oxidation with ferric chloride was examined. It was found that oxidation is effected irrespective of the length of alkyl group and 2-alkyl-8-hydroxy-1, 4-naphthoquinone derivatives are obtained in good yield. The melting point of these quinone derivatives increase with increasing molecular weight, the melting points rising or falling alternately with even and odd number of carbon atoms, and compounds with even number of carbon atoms showed higher melting point than those with odd numbers. Such tendency was not observed with intermediates other than quinone derivatives.
