(DBU) (3 mol%) as an initiator. Polymers obtained by t-BuOK in polar solvents were composed of the hydrogen-transferpolymerization unit selectively, while those afforded by t-BuOK in less polar solvents or by DBU were composed of both the hydrogen-transfer and the vinyl polymerization units. Although N-acryloyl-N-methyl-N′-p-tolylsulfonylurea (2) prepared by the reaction of p-tolylsulfonyl isocyanate with