HCID 21877347, compound → HCID 21877382, compound

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5-Chloro-2-methyl-4-[2-(trimethyl-silanyl)-ethoxymethoxy]-phenyl-boronic acid was prepared in 54% yield from [2-(4-bromo-2-chloro-5-methyl-phenoxymethoxy)-ethyl]-trimethyl-silane according to the procedure for 5-methoxy-2-methyl-[2-(trimethyl-silanyl)-ethoxymethoxy]-phenyl-boronic acid. 1H NMR (300 MHz, CDCl3) δ 8.11 (s. 1H), 7.09 (s, 1H), 5.37 (s, 2H), 3.84 (t, 2H, J=8.4 Hz), 2.76 (s, 3H), 0.98 (t, 2H, J=8.4 Hz), 0.01 (s, 9H). Anal. (C13H22BClO4Si—H2O)C, H. Calculated: C, 52.28; H, 6.75. Found: C, 51.98; H. 6.84.

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