, UV-vis (toluene), ? max abs (? max (mol ?1 L cm ?1 ): 460 (1.78 × 10 4 ), 333 (5.69 × 10 4 ) nm, ? max em, p.4
, To a mixture of 2-(2-bromoethoxy)ethanol (65.9 mg, 0.39 mmol, 1 eq.), carboxylic acid derivative 4 (299 mg, 0.39 mmol, 1 eq.), and 4-(dimethylamino) pyridinium 4-toluenesulfonate (57.4 mg, 0.20 mmol, 0.5 eq.) in dichloromethane (15 mL) was added N,N?-diisopropylcarbodiimide (121 µL, 0.78 mmol, 2 eq.). red powder (200 mg, 51%). 1 H NMR (300 MHz
,
, Hz, 6H), 4.55 (m, 2H), 3.90 (m, 4H), 3.52 (t, J = 6.1 Hz, 2H), 1.37 (s, 18H). 13 C NMR (75 MHz, Hz, 1H), 7.81 (d, J = 7.5 Hz, 1H), 7.55 (d, J = 8.0 Hz, 8H), 7.47 (d, J = 8.5 Hz, 4H), 7.30 (t, J = 9
, Tris(trimethylsilyl)phosphite (2 mL, 6 mmol, 55 eq.) was added to compound 5 (100 mg, 0.11 mmol, 1 eq.) introduced in a flamedried flask under argon. The reaction mixture was allowed to stir for 24 h at 140 °C under argon atmosphere. To the reaction mixture was added methanol (2 mL), the mixture was then stirred for an additional 6 h at 60 °C and methanol was removed under reduced pressure. The crude red product was precipitated in methanol and filtered to give without any further purification compound 6 (p-BDZ) as a pure red powder (100 mg, 100%). T g 146 °C. 1 H NMR (300 MHz, )benzoyl)oxy)ethoxy)ethyl)phosphonic acid, pp.p-BDZ
, 13 C NMR (75 MHz, Hz, 1H), 7.81 (d, J = 7.5 Hz, 1H), 7.43-7.55 (m, 12H), 7.22-7.33 (m, 6H), 4.52 (m, 2H), 3.82 (m, 6H), vol.1, 2018.
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