Method for producing fenofibrate from fenofibric acid by in situ preparation of fenofibric acid chloride by means of the action of a chlorinating agent on the acid then by reaction with isopropanol without isolation of the acid chloride.

A method for preparing 2-(n-butyl)-5-nitrobenzofuran from l-halo-4-nitrobenzene, characterized in that l-hexen-3-ol is reacted, and then the product is subject to a Claisen rearrangement, followed by catalytic intramolecular cyclization.