Dehydro--4,5,15,16-tetramethyl[22] (5,8) phenalenophane-1, 12-diene

Abstract A synthesis of anti -4,5,15,16-tetramethyl[2 2 ] (5,8) phenalenophane-1,12-diene ( 11 ) is described as well as its transformation via a radical abstraction process to an enantiomeric mixture of the Cope rearrangement product 3 .