Asymmetric Diels–Alder reactions: (S)-(+)-[(η5-C5H5)Fe(CO)(PPh3)COCHCH2] as a chiral acrylate dienophile equivalent
Abstract
The zinc chloride-mediated Diels–Alder reaction between (S)-(+)-[(η5-C5H5)Fe(CO)(PPh3)COCHCH2] and cyclopentadiene yielded (2S)-(–)-bicyclo[2.2.1]hept-5-ene-2-endo-carboxylic acid which was converted into the corresponding optically pure iodolactone.