Cyclopentanecarboxylic acid
Cyclopentanecarboxylic acid is an organic compound with the formula. It is a colorless nonvolatile oil. It can be produced by the palladium-catalyzed hydrocarboxylation of cyclopentene:
An alternative route involves the Favorskii rearrangement, which is a base-induced ring contraction of 2-chlorocyclohexanone to give the ester methyl cyclopentanecarboxylate, which can be hydrolyzed to the carboxylic acid.