Fig. 2: Synthesis of dendrimer support.

Reagents and conditions: (i) 2 (3.5 equiv.), K₂CO₃ (9.0 equiv.), 18-crown-6 (20 mol%), acetone, 65 °C, 7 h; (ii) 4 (27 equiv.), CuBr(PPh₃)₃ (1.8 equiv.), NEtⁱPr₂ (9.0 equiv.), THF, microwave, 140 °C, 15 min. Ph phenyl, Et ethyl, ⁱPr iso-propyl,THF tetrahydrofuran.