Unexpected products in the synthesis of tetracyclic anthrone systems

الملخص EN

An unexpected bis-anthranol (11) was obtained in an attempt to synthesis 1, 4- dimethxy anthrone (5a) as a precursor in the total synthesis of tetracyclic anthrone systems (7 and 8) related to anthracyclinones.

Oxidative-demethylation of (11) to the corresponding quinone (12) gave the unexpected quinone methide (13).

The structure of the latter and the other compounds were confined by spectroscopic measurements.