Facile desymmetrization of 1,4‐diethynylbicyclo[2.2.2]octane based on TMS protection of one of the acetylene termini followed by sublimation of the desired product is presented. The reactivity of this derivative was demonstrated in the synthesis of a complex pyridine‐terminated molecular rod containing both a bicyclo[1.1.1]pentane and a bicyclo[2.2.2]octane cage.