Roly J. Armstrong, V. Aggarwal
Jun 20, 2018
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Influential Citations
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Citations
Journal
Organic Syntheses
Abstract
A. 4,4,5,5-Tetramethyl-2-phenethyl-1,3,2-dioxaborolane (1). An oven-dried 250 mL two-necked round-bottomed flask equipped with a 2.5 cm magnetic stir bar, a rubber septum and a nitrogen inlet is charged with 2-phenyl-1ethylboronic acid (10.0 g, 66.7 mmol, 1.00 equiv) (Note 2), pinacol (7.88 g, 66.7 mmol, 1.00 equiv) (Note 2) and oven-dried magnesium sulfate (12.0 g, 99.7 mmol, 1.50 equiv) (Note 2). The flask is evacuated and backfilled with nitrogen three times and then charged by syringe with tert-butyl methyl ether (70 mL) (Note 2). The resulting white suspension is stirred under nitrogen at room temperature for 16 h (Figure 1). B OH OH B O O