Tricyclo[4.2.2.2^2,5] dodecane and Tricyclo [4.2.2.1^2,5]undecane. Preliminary communication

Abstract

Abstract A synthesis of tricyclo [4.2.2.2 2,5 ]dodecane ( 19 ), a novel tricyclic C 12 H 20 compound, is described. The key intermediate ketone 13 was prepared either from the C 10 ‐photodimer 1 of cyclopentadienone or the C 11 ‐cycloaddition products 11 and 12 . 13 was also transformed to tricyclo [4.2.2.1 2,5 ]undecane ( 8 ).