Methanol → (S)-2-(2-(3-bromophenyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyethanol

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To a solution of (S)-2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyethyl pivalate (310 mg, 0.577 mmol) in dioxane (5 mL), was added 3-bromophenylboronic acid (173 mg, 0.865 mmol), Ph(PPh3)4 (33 mg, 0.029 mmol) 2N K2CO3 (850 μL) in sealed tube. The reaction mixture was heated at 90° C. for 3 hs. Then the reaction was cooled down and to the mixture was added MeOH (5 mL), 2N NaOH (1.5 mL) and heated at 45° C. After the reaction was finished, the reaction was washed by water, extracted by EtOAc. The organic phase was dried over MgSO4, filtered, concentrated down and purified by silica gel column, eluting by 0-50% EtOAc in hexanes to give the product (110 mg, 36%). LCMS-ESI+: calc'd for C26H25BrClNO2S: 530.0 (M+H+); Found: 530.2 (M+H+).

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