2.5.3. Vinyl-Terminated Dendron G2

2,4-didodecylamino-6-piperazino-1,3,5-triazine (220 mg, 0.41 mmol) and vinyl-terminated carbosilane dendron BrG2V4 (140 mg, 0.3 mmol), K2CO3 (70 mg, 0.5 mmol) were mixed in 30 mL acetone in a sealed ampule with catalytic amounts of 18-crown-6 and KI added. The reaction mixture was stirred for 24 h at 90 ◦C. The reaction completion was monitored by TOCSY 1H NMR following the disappearance of BrCH2 protons. When the reaction was over, the solvent was removed under vacuum, the residue was dissolved in ethyl acetate and washed with brine. The organic phase was dried over Na2SO4, and the solvent was removed. The crude product was purified by silica gel column chromatography (eluent: ethyl acetate:hexane 1:1) to yield functionalized dendron as light-yellow oil (245 mg, 90%).

1H NMR (400 MHz, CDCl3) δ –0.12 (s, 3H, Hm), 0.10 (s, 6H, Hq), 0.46 (m, 2H, Hl), 0.53 (m, 4H, Hn), 0.67 (m, 4H, Hp), 0.84 (t, J = 6.5 Hz, 6H, Ha), 1.19–1.35 (m, 42H, Hb, Hc, Hk, Ho), 1.50 (t, J = 7.3 Hz, 6H, Hd, Hj), 2.32 (t, J = 7.8 Hz, 2H, Hi), 2.42 (t, J = 5.1 Hz, 4H, Hh), 3.30 (d, J = 6.6 Hz, 4H, Hg), 3.76 (s, 4H, He), 4.88 (s, 2H, Hf), 5.59–6.21 (m, 12H, Hr). 13C NMR (101 MHz, CDCl3) δ -5.2, -5.1, 13.9, 14.1, 18.3, 18.5, 18.7, 22.0, 22.7, 26.9, 28.7–30.1 (m), 30.7, 30.9, 31.9, 40.6, 42.9, 53.2, 58.6, 132.6, 137.1, 164.7, 166.1.
