Abstract: Tris (9-anthron-10-y1idene) cyclopropane (7c) was prepared by the Friedel-Crafts reaction of 9-methoxyanthracene with trichloropropenium tetrachloroaluminate, followed by demethylation and oxidation of the resulting bis (9-hydroxy-10-anthry1) cyclopropenylidenanthrone. The corresponding triquinocyclopropanes with one or two anthraquino groups replaced by 4-oxo-3, 5-di-tert-butyl-2, 5-cyclohexadien-1-ylidene ...
![10-[2,3-bis(10-oxoanthracen-9-ylidene)cyclopropylidene]anthracen-9-one Structure](https://image.chemsrc.com/caspic/069/67745-26-0.png)