title: Synthesis of (+)-11-deoxy-15-ethynyl prostaglandins.
abstract: This article describes the preparation of (+)-11-deoxy-15-ethynyl prostaglandins (1 & 16). The key step involves a conjugate addition of the substituted 1-lithio-1-oct-1-ene (2) to the cyclopentenone (3 & 12) to furnish 11-deoxy-prostaglandin skeleton in a simple fashion. Of particular interest in this synthesis is the preparation of alkyl side chain (7) which was achieved in an efficient three-step synthesis starting from the readily available beta-iodo vinyl ketone (4).
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D011465:Prostaglandins, Synthetic / Q000138:chemical synthesis*
chemical_list: D011465:Prostaglandins, Synthetic