(1 1) IUPAC nomenclature: 10, tricycl0 [4.3. 1.03'~] dec-4-en-2-0ne; 11, tricyclo [4.3. 1. O'* a] dec-2-en-lO-one.(12) Satisfactory analyses were obtained for all new compounds.(13) Separation of the ketones could be achieved by preparative gas chromatography on an 18%- pmethyl-y-nitropimelonitrile column. 16 of these compounds (Figure 1) showed that the desired intramolecular [4+ 21 cycloaddition had occurred (relative integrated area of ...
