Sodium Carbonate → Benzyl (4-hydroxy-2-methylbutan-2-yl)carbamate

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To a 150-mL round-bottomed flask was added 3-amino-3-methyl-butan-1-ol (2.18 mL, 19.39 mmol, Tyger Sci. Inc) and Na2CO3 (3.08 g, 29.1 mmol) (1 M in water) and the solution was cooled to 0° C. Benzyl chloroformate (3.03 mL, 21.33 mmol, Sigma-Aldrich) was added dropwise and the mixture was stirred at 0° C. for 2 h. The mixture was extracted with EtOAc (100 mL×3) and the combined organic layers were dried (MgSO4), filtered and concentrated. The residue was purified with silica gel chromatography (eluted with 10-50% EtOAc in Hex) to give benzyl(4-hydroxy-2-methylbutan-2-yl)carbamate (3.33 g, 14.03 mmol, 72% yield) as a clear oil. MS (ESI, pos. ion) m/z: 238.1 (M+1).

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