Base-promoted rearrangement of 2,3,5,6-tetrachloropentacyclo-[5.4.0.02,6.03,10.05,9]undecane-4,8,11-trione
Abstract
Reaction of the title compound (III) with an excess of sodium hydroxide in refluxing toluene results in a novel rearrangement, affording 6-chloro-cis-1,2-dihydrobenzocyclobutene-1,2,3-tricarboxylic acid (IVa).