Asymmetric synthesis of (+)-cis-nemorensic acid from a chiral Diels-Alder adduct of 2,5-dimethylfuran.

(+)-cis-Nemorensic acid was synthesized from a chiral Diels-Alder adduct prepared by a catalytic enantioselective Diels-Alder reaction with 2,5-dimethylfuran and 2,2,2-trifluoroethyl acrylate.