| abstract |
The present invention provides a method for producing 9,9-bis (carboxyaryl) fluorenes and esters thereof in high yield. The compound represented by the formula (1) is reacted with carbon monoxide in the presence of a transition metal catalyst, water and / or alcohols. (In the formula, ring Z represents an aromatic hydrocarbon ring, R 1 represents a cyano group, a halogen atom or an alkyl group, R 2 represents a hydrocarbon group, an alkoxy group, an aryloxy group, an aralkyloxy group, etc .; 3 represents a hydrocarbon group optionally substituted by a halogen atom such as a trifluoromethyl group, k is an integer of 0 to 4, m is an integer of 0 or more, and n is an integer of 1 or more.) [Selection figure] None |