Reactive intermediates, part IX. An attempted synthesis of phenanthrocyclopropenone
Abstract
The dehydrobromination of 5,7-dibromodibenzo[a,c]cycloheptadien-6-one (II) has been investigated as a possible route to phenanthrocyclopropenone (I). The products of the reactions are derivatives of 9-phenanthroic acid, but the cyclopropenone is probably not an intermediate in their formation.