Prostaglandins Part 7. Synthesis of (±)-11-deoxy-10-hydroxy- and (±)-11-deoxy-10-oxoprostaglandins
Abstract
The epoxides of 2-alkylcyclopent-2-enones (I) react with acetic acid to give 5-acetoxy-2-alkylcyclopent-2-enones (II) which afford (±)-11-deoxy-10-hydroxyprostaglandins [(V) and (IX)]via conjugate-addition reactions. The 11-deoxy-10-hydroxyprostaglandin (IXa) readily undergoes base-catalysed autoxidation to the 11-deoxy-10-oxoprostaglandin (XIII).