Diethyl coronylidenemalonate (II), prepared from coronaldehyde, was nitrated to diethyl dinitrocoronylidenemalonate (III). Cyanocoronene (V), also prepared from coronaldehyde via coronaldoxime (IV), gave on hydrolysis coronenecarboxylic acid (VII). Nitration of cyanocoronene, under vigorous conditions, produced cyanopentanitrocoronene (VI) which was converted into pentanitrocoronenecarboxylic acid (VIII). This acid (VIII) was also prepared by nitrating coronenecarboxylic acid (VII) under forcing conditions.
R E MARKS ,J A ELVIDGE ,M A QURESHI ,
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