ChemicalBook CAS DataBase List (4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanol

(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanol synthesis

8synthesis methods

Product Name:(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanol
CAS Number:302348-51-2
Molecular formula:C13H19BO3
Molecular Weight:234.1

128376-64-7 Synthesis

4-Formylphenylboronic acid pinacol cyclic ester

128376-64-7
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$5.00/250mg

(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanol

302348-51-2
133 suppliers
$5.00/250mg

Yield:302348-51-2 513 mg

Reaction Conditions:

with sodium tetrahydroborate at 20; for 5 h;

Steps:

[4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]methanol (2a).
To a mixture of a4-formylbenzenboronic acid (1a, 375 mg, 2.50 mmol), pinacol (355 mg, 3.00 mmol) and anhydrous magnesium sulfate (625 mg, 5.00 mmol), methanol was added (12.50 mL). The mixture was stirred at room temperature for 6 h. After the reaction was completed, the crude solution was filtered, and then sodium borohydride (47 mg, 1.25 mmol) was added to the filtrate. Afterwards, the reaction mixture was stirred for an additional 5 h. Once the reaction was completed, the reaction mixture was filtered and the filtrate was concentrated in vacuo to give the desired product 2a as a white solid (m.p. 75-77 °C) in88% yield (513 mg). ¹H-NMR (CD₃OD-d₄) δ ppm 7.71 (d, J = 8.0 Hz, 2H), 7.35 (d, J = 7.8 Hz, 2H),4.62 (s, 2H), 1.34 (s, 12H); ¹³C-NMR (CD₃OD-d₄) δ ppm 146.23, 135.93, 127.26, 85.19, 65.24, 25.34;¹¹B-NMR (CDCl₃) δ ppm 34.82.

References:

Chung, Sheng-Hsuan;Lin, Ting-Ju;Hu, Qian-Yu;Tsai, Chia-Hua;Pan, Po-Shen [Molecules,2013,vol. 18,# 10,p. 12346 - 12367]

FullText

873-75-6 Synthesis