Bromotrimethylsilane → 3-(4-((4-(Bis(4-methoxyphenyl)amino)phenyl)(4-methoxyphenyl)amino)phenoxy)propylphosphonic acid

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Reaction Steps

11. To a dry 25 mL round bottom flask under nitrogen was added diethyl3-(4-((4-(bis(4-methoxyphenyl)amino)phenyl)(4-methoxyphenyl)amino)phenoxy)propylphosphonate (0.500 g, 0.718 mmol) and the flask was purged with nitrogen. Dichloromethane (1.00 mL) and bromotrimethylsilane (0.199 g, 2.30 mmol) were added under nitrogen and the mixture was allowed to stir at room temperature overnight. Upon disappearance of the starting material the solvent was removed through nitrogen purge. Residual solvent was removed in vacuo. Anhydrous methanol (8.00 mL) was added to the flask and allowed to stir at room temperature overnight. White solid was filtered from methanol through cannula filtration. Solid was washed using 3×5 mL anhydrous methanol and dried in vacuo. The product was collected under nitrogen atmosphere as a green solid (0.185 g, 40.2%). 1H NMR (400 MHz, (CD3)2SO) δ 9.87 (s, 2H), 6.89 (m, 8H), 6.83 (m, 8H), 6.71 (s, 4H), 3.91 (m, 2H), 3.69 (s, 9H), 1.84 (m, 2H), 1.51 (m, 2H). 13C {1H} NMR (400 MHz, (CD3)2S, δ): 154.98, 154.40, 142.17, 140.91, 140.77, 125.27, 125.19, 122.72, 122.68, 115.37, 114.82, 68.35 (m), 55.24, 23.62 (m). 31P NMR (400 MHz, (CD3)2S, δ): 25.05. HRMS-EI (m/z): [M]+ calcd for C36H37N2O7P, 640.23; found, 640.1). Anal. Calcd for C36H37N2O7P: C, 67.49; H, 5.82; N, 4.37. Found: C, 67.09; H, 6.16; N, 3.99.

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