HCID 23471436, compound → HCID 23471407, compound

Participants

Reaction Steps

A mixture of isomers of 1,4-dimethoxy-11,12-dihydroxy-9,10-ethano-anthracene weighing 10 g. is dissolved in 150 ml. of glacial acetic acid at 50° C. and treated portionwise with 30 g. of lead tetraacetate. After 2 hours at 50° C., the solution is filtered to remove insoluble materials and cooled yielding orange crystals, which are filtered, washed with glacial acetic acid and dried, m.p. 208°-212° C.

Provenance & Evidence