Abstract
In recent years, we have reported on the cycloaddition reactions of dichloroketene to diphenylfulvene1, diphenylbenzorulvene1, and indene2. Last year Kaplan and Hartwig3 published an interesting communication describing the photolysis of exo-3-chlorobicyclo [2.2.1] hept-5-en-2-one (1) to from endo-ó-carbomethoxybicyclo [3.1.0] hex-2-ene (2) in a stereospecific manner.