PROCESS FOR PRODUCING FLUORENE OR ITS DERIVATIVES

摘要

A process for efficiently and industrially advantageously producing fluorene or its derivatives represented by general formula (II) via the gas-phase intra-molecular dehydrocyclization of aromatic compounds represented by general formula (I) as an inexpensive material. It is expected that the fluorene or its derivatives are usable as starting materials for producing heat-resistant epoxy resins, polycarbonates and polyesters, wherein R1 and R2 represent each hydrogen, methyl or ethyl, or R1 and R2 together represent =O; and R and R' represent each hydrogen, C1-4 alkyl or C1-4 alkoxy.