Process for the preparation of furans and phenanthrenes

摘要

Furans are prepared by reacting a beta , gamma -olefinically unsaturated carbonyl compound, at temperatures of from -20 to +150 DEG C, with an oxidising agent which is suitable for epoxidising or hydroxylating olefinic double bonds. Phenanthrenes are prepared by converting a beta , gamma -olefinically unsaturated carbonyl compound from the group comprising the 2-(cyclohexen-1-yl)cyclohexanones, at temperatures of from -20 to +150 DEG C and using an oxidising agent which is suitable for epoxidising or hydroxylating olefinic double bonds, into the corresponding, partially hydrogenated, dibenzofuran, subsequently reacting the latter with a dienophile, and subjecting the resulting adduct first to a dehydrating treatment and then to a dehydrogenating treatment.