Triethylamine → [4-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzyloxy]-acetic acid tert-butyl ester

Beteiligte Stoffe

Reaktionsschritte

The procedure used in Example 3: step b was followed using (3-iodo-4-methyl-benzyloxy)-acetic acid tert-butyl ester ((Example 300: step a) 600 mg, 1.65 mmol), PdCl2(PPh3)2 (58 mg, 0.08 mmol), triethylamine (1.25 mL, 9.4 mmol), and 4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (0.91 mL, 6.4 mmol) in dioxane (5 mL). Analogous aqueous workup and purification by SiO2 flash column chromatography yielded the title compound contaminated with the product resulting from halide reduction (569 mg, 95%). The material was used without further purification. 1H-NMR (CDCl3): δ 7.73 (d, 1H, J=1.9 Hz), 7.38 (dd, 1H, J=2.1, 7.9 Hz), 7.18 (d, 1H, J=7.9 Hz), 4.61 (s, 2H), 3.97 (s, 2H), 2.55 (s, 3H), 1.50 (s, 9H), 1.37 (s, 9H).

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