7,12-dihydrobenzo[a]anthracene-7,12-dicarbaldehyde → Benz(a)anthracene-7,12-dicarboxaldehyde

Participants

Reaction Steps

A mixture of isomers of 7,12-dihydro-7,12-benz[a]anthracene dicarboxaldehyde [Newman & Din, J. Org. Chem. 36, 967 (1971)] is suspended in 75 ml. of glacial acetic acid, treated with 6 g. of ferric chloride hexahydrate and stirred at room temperature for 3 hours. The remaining yellow solid is filtered off, washed with acetic acid and water leaving the yellow product, m.p. 197°-198° C.

Provenance & Evidence