Dendronized polymers: Increasing of dendron generation by the attach-to approach

Dendronization with the first: generation (G1) building block 10b of the po lystyrenes 13c and 14c carrying first (G1) and second generation (G2), amin o-terminated appendant dendrons is reported. Comparison of the H-1 and C-13 NMR spectra of the resulting G2 and G3 polystyrenes (15, 17a) with those r ecorded of the same polymers independently prepared from the corresponding G2 and G3 macromonomers 16 and 12, respectively, proved the degree of cover age to be virtually 100%. This is the first example of a convergent synthes is of a G3 polymer, which will considerably widen the synthetic access into this class of macromolecules.