4-((Trimethylsilyl)ethynyl)phenol → 1,4-Bis(4-hyroxyphenyl)-1,2,3-triazole

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4-BPT was prepared in a similar manner as 3-BPT, using 4-TMSE-phenol (3.50 g, 18.4 mmol) and 4-azidophenol (3.73 g, 27.9 mmol) instead of 3-TMSE-phenol and 3-azidophenol. This gave 2.79 g (60% yield) of a purple crystal. 1H NMR (MeOD-d4, 300 MHz, ppm): 8.62 (s, 1H, triazol-H), 7.75-7.68 (m, 4H, Ar—H), 6.99 (d, 2H, J=9.0 Hz, Ar—H), 6.90 (d, 2H, J=8.7 Hz, Ar—H). 13C NMR (MeOD-d4, 75 MHz, ppm): 159.7, 159.3, 149.8, 131.0, 128.4, 123.4, 123.0, 119.4, 117.3, 116.9.

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