A convergent total synthesis of (±-PGF2α via the conjugate addition of the dioctenylcuprate reagent 7a, derived from 1-iodo-3-hydroxyoct-1-cis-ene, to 4-[(tert-butyldimethylsilyl)oxy]cyclopent-2-en-l-one (2a) followed by regiospecific enolate trapping with ketene bis(methylthio)acetal monoxide (18) and stereospecific sulfenate-sulfoxide transformation is reported. The thioacetal intermediate 22, after stereospecific reduction and hydrolysis, is converted to the known ketol 24 and then to ±-PGF2α. © 1979, American Chemical Society. All rights reserved.