Substituted 7‐aryl‐2,6‐dimethyl‐1,4‐benzoquinone methides which have an electron‐donating methoxy substituent at the para‐position (p‐OMe, 2a) or an electron‐withdrawing chloro one at the para‐ (p‐Cl, 2b), meta‐ (m‐Cl, 2c), and ortho‐positions (o‐Cl, 2d) of the benzene ring were synthesized, and their asymmetricanionicpolymerizations using the complex of lithium 4‐isopropylphenoxide with (−)‐sparteine