Patent ID: 6037501
Filing Date: 2000-03-14
Classification: C07C

Abstract:
A process for the preparation of fluorenes represented by the following formula (II): ##STR9## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom, a methyl group or an ethyl group or R.sub.1 and R.sub.2 together represent .dbd.O, and R and R' each represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, which comprises subjecting an aromatic compound represented by the following formula (I): ##STR10## wherein R.sub.1, R.sub.2, R and R' are the same as defined above, to a vapor-phase intramolecular cyclodehydrogenation reaction.