4-(tert-Butyldimethylsilyloxy)phenylboronic Acid (contains varying amounts of Anhydride) → HCID 85977671, compound

Participants

Reaction Steps

The title compound was prepared by reacting trifluoro-methanesulfonic acid 4-formyl-2-methyl-phenyl ester (9.3 mmol) with 4-tert-butyl-dimethylsilyoxyphenylboronic acid (2.35 g, 9.3 mmol) according to Method B to yield 1.12 mg (57%, over two steps) of yellowish solid: mp 94-96° C.; 1H NMR (DMSO-d6): ): δ 2.33 (3H, s), 6.86 (2H, d, J=8.55 Hz), 7.22 (2H, d, J=8.51 Hz), 7.39 (1H, d, J=7.81 Hz), 7.61 (1H, d, J=7.82 Hz), 7.81 (1H, s), 9.65 (1H, s), 10.00 (1H, s); IR 1670 cm−1; MS (ESI) m/z 211 (M−H)−, 213 (M+H)+.

Provenance & Evidence