Water → 2-(2,4,6-Trimethoxybenzylthio)phenylboronic acid

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To a solution of 4.22 g (2-bromophenyl)(2,4,6-trimethoxybenzyl)sulfane (11.56 mmol) in 150 ml dry THF at −78° C. was added slowly 5.6 ml 2.5M n-BuLi. The solution was stirred at −78° C. for 25 minutes. 1.6 ml B(OMe)3 was added at −78° C. The reaction was stirred 2 hours at RT. 100 ml water was added, stirred overnight. The mixture was extracted with ethyl acetate (2×100 ml). The organic layer was washed with brine, dried over magnesium sulfate, filtered and concentrated. Purification by gradient chromatography (hexane:ethyl acetate 60:40) yielded 1.762 g product (5.3 mmol, 46% yield).

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