1,2-CARBONYL TRANSPOSITION OF<i>CIS</i>-BICYCLO[3.3.O]OCTAN-2-ONE TO ITS 3-ONE SKELETON: APPLICATION TO SYNTHESES OF<i>dl</i>-HIRSUTIC ACID AND<i>dl</i>-9(0)-METHANOPROSTACYCLIN
A synthetic route to dl-hirsutic acid and an improved synthesis of dl-9(0)-methanoprostacyclin, both of which employ the 1,2-carbonyl transposition as a key step, are described.