Processes and intermediates for the preparations of prostaglandins

摘要

The present invention provides novel processes for the preparation of a cyclopentanone of Formula II and a lactone of Formula I, which are useful in the production of prostaglandins:
wherein Z, R 2 , R 3 , X 1 , X 2 , and ------ are as defined in the specification. The invention also provides novel enantiomerically enriched compounds.